springboot集成ES_springboot es

elasticsearch:
rest:
uris: 127.0.0.1:9200 #—ES的连接地址，多个地址用逗号分隔
username: #—用户名
password: #—密码
connection-timeout: 1000 #—连接超时时间(默认1s)
read-timeout: 1000 #—读取超时时间(默认30s)

---

 

3.JavaBean配置以及ES相关注解

• 注解：@Document用来声明Java对象与ElasticSearch索引的关系
               indexName 索引名称(是字母的话必须是小写字母)
               type 索引类型
               shards 主分区数量，默认5
               replicas 副本分区数量，默认1
               createIndex 索引不存在时，是否自动创建索引，默认true
                          不建议自动创建索引(自动创建的索引 是按着默认类型和默认分词器)
• 注解：@Id 表示索引的主键
• 注解：@Field 用来描述字段的ES数据类型，是否分词等配置，等于Mapping描述
               index 设置字段是否索引，默认是true，如果是false则该字段不能被查询
               store 默认为no,被store标记的fields被存储在和index不同的fragment中，以便于快速检索。虽然store占用磁盘空间，但是减少了计算。
               type 数据类型(text、keyword、date、object、geo等)
               analyzer 对字段使用分词器，注意一般如果要使用分词器，字段的type一般是text。
               format 定义日期时间格式，详细见 官方文档: format | Elasticsearch Guide [8.9] | Elastic.
• 注解：@CompletionField 定义关键词索引 要完成补全搜索
               analyzer 对字段使用分词器，注意一般如果要使用分词器，字段的type一般是text。
               searchAnalyzer 显示指定搜索时分词器，默认是和索引是同一个，保证分词的一致性。
               maxInputLength:设置单个输入的长度，默认为50 UTF-16 代码点

常用数据类型：

简单类型：

• 字符串类型: - string(不再支持)可知string类型的field已经被移除了, 我们需要用text或keyword类型来代替string.
                      text：会分词，不支持聚合
                      keyword：不会分词，将全部内容作为一个词条，支持聚合

• 数字类型: 尽可能选择范围小的数据类型, 字段的长度越短, 索引和搜索的效率越高;(优先考虑使用带缩放因子的浮点类型)
                  byte :            有符号的8位整数, 范围: [-128 ~ 127]
                  short :           有符号的16位整数, 范围: [-32768 ~ 32767]
                  integer :        有符号的32位整数, 范围: [−231 ~ 231-1]
                  long :            有符号的64位整数, 范围: [−263 ~ 263-1]
                  float :             32位单精度浮点数
                  double :         64位双精度浮点数
                  half_float :     16位半精度IEEE 754浮点类型
                  scaled_float : 缩放类型的的浮点数, 比如price字段只需精确到分, 57.34缩放因子为100, 存储结果为5734

• 日期类型:date JSON没有日期数据类型, 所以在ES中, 日期可以是:
    —   包含格式化日期的字符串 “2018-10-01”, 或"2018/10/01 12:10:30"    (可以通过 format属性 定义日期时间格式）DateFormat 官方文法.
    —   代表时间毫秒数的长整型数字.
    —   代表时间秒数的整数.

• 布尔类型： boolean 可以接受表示真、假的字符串或数字:
    —  真值: true, “true”, “on”, “yes”, “1”…
    —  假值: false, “false”, “off”, “no”, “0”, “”(空字符串), 0.0, 0

---

复杂类型:

• 数组[]： 由数组中第一个非空值决定数组类型(type = FieldType.Keyword)
• List集合： 由数组中第一个非空值决定数组类型(type = FieldType.Keyword)
• 嵌套类型: list里泛型是object形式的或自定义对象(type = FieldType.Nested)
• 对象：{ }object for single JSON objects 单个JSON对象(type = FieldType.Object)

---

 

3.1 Student实体类

import lombok.AllArgsConstructor;

import lombok.Data;

import lombok.NoArgsConstructor;

import org.springframework.data.annotation.Id;

import org.springframework.data.elasticsearch.annotations.DateFormat;

import org.springframework.data.elasticsearch.annotations.Document;

import org.springframework.data.elasticsearch.annotations.Field;

import org.springframework.data.elasticsearch.annotations.FieldType;

import java.util.Date;
import java.util.List;

/*

• 学生

• */
  @Data
  @AllArgsConstructor
  @NoArgsConstructor
  //indexName名字如果是字母那么必须是小写字母
  @Document(indexName = “student”, type = “_doc”, replicas = 1, shards = 1, createIndex = true)
  public class Student {

  @Id
  @Field(index = true, store = true, type = FieldType.Keyword)
  private String sId;

  @Field(index = true, store = true, type = FieldType.Keyword)
  private String sName;

  @Field(index = true, store = true, type = FieldType.Text, analyzer = “ik_smart”)
  //Text可以分词 ik_smart=粗粒度分词 ik_max_word 为细粒度分词
  private String sAddress;

  @Field(index = false, store = true, type = FieldType.Integer)
  private Integer sAge;

  @Field(index = false, store = true, type = FieldType.Date, format = DateFormat.basic_date_time)
  private Date sCreateTime;

  @Field(index = false, store = true, type = FieldType.Object)
  private Headmaster sHeadmaster;//班主任

  @Field(index = true, store = false, type = FieldType.Keyword)
  private String[] sCourseList; //数组类型 由数组中第一个非空值决定(这里数组和集合一个意思了)

  @Field(index = true, store = false, type = FieldType.Keyword)
  private List<String> sColorList; //集合类型 由数组中第一个非空值决定

  @Field(index = true, store = false, type = FieldType.Nested)//嵌套类型list里泛型是object形式的或自定义对象
  private List<Teacher> sTeacherList; //教所有科目的老师

}

---

 

3.2 Teacher实体类

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.*;
import org.springframework.data.elasticsearch.core.completion.Completion;

import java.util.Date;

/*

• 科目老师

• */
  @Data
  @NoArgsConstructor
  @AllArgsConstructor
  @Document(indexName = “teacher”, type = “_doc”, replicas = 1, shards = 1, createIndex = true)
  public class Teacher {

  //主键id
  @Id
  @Field(index = true, store = true, type = FieldType.Keyword)//index:设置通过这个字段是否可以进行搜索
  private String tId;

  //姓名
  @Field(index = true, store = true, type = FieldType.Keyword)
  private String tName;

  //英文姓名
  @Field(index = true, store = true, type = FieldType.Keyword)
  private String tEnglishName;

  //班级
  @Field(index = true, store = true, type = FieldType.Keyword)
  private String tClassName;

  //地址
  @Field(index = true, store = true, type = FieldType.Text, analyzer = “ik_smart”)
  private String tAddress;

  //至理名言
  @Field(index = true, store = true, type = FieldType.Keyword)
  private String tFamous;

  //年龄
  @Field(index = true, store = true, type = FieldType.Integer)
  private Integer tAge;

  //日期
  @Field(index = true, store = true, type = FieldType.Date, format = DateFormat.basic_date_time)
  private Date tCreateTime;

  //定义关键词索引 要完成补全搜索，必须要用到特殊的数据类型completion，
  //要汉字拼音都能补全，必须要使用自定义的ik+pinyin分词器
  // maxInputLength:设置单个输入的长度，默认为50 UTF-16 代码点
  @CompletionField(analyzer = “ik_smart”, searchAnalyzer = “ik_smart”, maxInputLength = 100)
  private Completion completion;

  public Teacher(String tId, String tName, String tEnglishName, String tClassName, String tAddress, Integer tAge, Date tCreateTime) {
  this.tId = tId;
  this.tName = tName;
  this.tEnglishName = tEnglishName;
  this.tClassName = tClassName;
  this.tAddress = tAddress;
  this.tAge = tAge;
  this.tCreateTime = tCreateTime;
  }
  }

---

 

3.3 Headmaster 实体类

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;
import java.util.Date;
import java.util.List;

/*

• 班主任

• */
  @Data
  @NoArgsConstructor
  @AllArgsConstructor
  @Document(indexName = “headmaster”, type = “_doc”, replicas = 1, shards = 1, createIndex = true)
  public class Headmaster {

  @Field(index = true, store = false, type = FieldType.Keyword)
  private String hId;

  @Field(index = true, store = false, type = FieldType.Keyword)
  private String hName;

  @Field(index = true, store = false, type = FieldType.Keyword)
  private String hAddress;

  @Field(index = false, store = false, type = FieldType.Integer)
  private Integer hSalary;

  @Field(index = false, store = false, type = FieldType.Keyword)
  private List<String> hClass;

  @Field(index = true, store = true, type = FieldType.Date, format = DateFormat.basic_date_time)
  private Date hCreateTime;
  }

---

 

4. 启动类配置

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/*

• 搜索引擎客户端启动类
• */
  @SpringBootApplication
  public class ElasticsearchApplication {
  public static void main(String[] args) {
  SpringApplication.run(ElasticsearchApplication.class, args);
  }
  }

---

 

5.elasticsearchRestTemplate 新增

• 5.1 createIndex && putMapping 创建索引及映射

• • createIndex ：新增索引(数据库)
  • putMapping ：新增映射（表结构）
  • 一定要通过这种方法创建，否则创建出来的映射都是默认的

  ---

  createIndex && putMapping 创建索引及映射测试

  • 入参classType : 对象是要被ES注解所引用的的(基于@Field和@Documen注解属性 创建索引和映射)

• 5.1.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSaveService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.*;
  

• /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 新增类
    */
    @RestController
    @RequestMapping(“/elasticSearch/save”)
    public class ElasticsearchSaveController {

    @Autowired
    private ElasticsearchSaveService elasticsearchSaveService;

    /**

    • @param classType : 要创建es的索引及映射(一定要通过这种方法创建，否则都是创建出来的映射都是默认的)基于传入对象中的@Document注解
    • @return boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:43
      */
      @PostMapping(“createIndexAndMapping”)
      public boolean createIndexAndMapping(Class<?> classType) {
      return elasticsearchSaveService.createIndexAndMapping(classType);
      }

  }
  
  

  ---

   

  5.1.2 service层

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 新增
    */
    public interface ElasticsearchSaveService {

    /**

    • @param classType : 要创建es的索引及映射(一定要通过这种方法创建，否则都是创建出来的映射都是默认的)基于传入对象中的@Document注解
    • @return boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:43
      */
      boolean createIndexAndMapping(Class<?> classType);
      }

  ---

   

  5.1.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSaveService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.stereotype.Service;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 新增
    */
    @Service
    public class ElasticsearchSaveServiceImp implements ElasticsearchSaveService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param classType : 要创建es的索引及映射(一定要通过这种方法创建，否则都是创建出来的映射都是默认的)基于传入对象中的@Document注解
    • @return boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:43
      */
      @Override
      public boolean createIndexAndMapping(Class<?> classType) {
      if (elasticsearchRestTemplate.indexExists(classType))
      return true;
      boolean index = elasticsearchRestTemplate.createIndex(classType);
      boolean mapping = elasticsearchRestTemplate.putMapping(classType);
      return index && mapping;
      }
      }
      

    ---

     

    createIndex && putMapping 创建索引及映射测试结果：

    • 根据入参对象 ES注解 创建索引及映射
      
      

    import com.it.mhh.elasticsearch.controller.ElasticsearchSaveController;
    

  import com.it.mhh.elasticsearch.entity.Headmaster;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.elasticsearch.core.completion.Completion;
  import org.springframework.test.context.junit4.SpringRunner;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 测试
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSaveControllerTest {

    @Autowired
    private ElasticsearchSaveController elasticsearchSaveController;

    /**

    • @param classType : 要创建es的索引及映射(一定要通过这种方法创建，否则都是创建出来的映射都是默认的)基于传入对象中的@Document注解
    • @return boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:43
      */
      @Test
      public void createIndexAndMapping() {
      boolean indexAndMapping = elasticsearchSaveController.createIndexAndMapping(Student.class);
      System.err.println(indexAndMapping);
      }

  }

  ---

• 5.2 save 添加文档

• • save(Iterable entities)：可传集合 批量添加(同种类对象集合)
  • save(T entity) ：单个对象
  • save(T… entities) : 可变参

  ---

  save 添加文档测试

  • 入参entities ：有重载 可传集合 单个 或者 可变参

• 5.2.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSaveService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.*;
  

• /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 新增类
    */
    @RestController
    @RequestMapping(“/elasticSearch/save”)
    public class ElasticsearchSaveController {

    @Autowired
    private ElasticsearchSaveService elasticsearchSaveService;

    /**

    • @param entities : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】
    • @return T 反参对象
    • @explain : 添加文档
    • @Author Mhh
    • @Date 2021/12/27 10:55
      */
      @PostMapping(“saveList”)
      public <T> Iterable<T> save(@RequestBody Iterable<T> entities) {
      return elasticsearchSaveService.save(entities);
      }

    /**

    • @param t : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】
    • @return T 反参对象
    • @explain : 添加文档
    • @Author Mhh
    • @Date 2021/12/27 10:55
      */
      @PostMapping(“save”)
      public <T> T save(@RequestBody T t) {
      return elasticsearchSaveService.save(t);
      }

  }
  
  

  ---

   

  5.2.2 service层

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 新增
    */
    public interface ElasticsearchSaveService {

    /**
    1

    • @param entities : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】
    • @return T 反参对象
    • @explain : 添加文档
    • @Author Mhh
    • @Date 2021/12/27 10:55
      */
      public <T> Iterable<T> save(Iterable<T> entities);

    /**

    • @param t : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】
    • @return T 反参对象
    • @explain : 添加文档
    • @Author Mhh
    • @Date 2021/12/27 10:55
      */

    public <T> T save(T t);
    }

  ---

   

  5.2.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSaveService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.stereotype.Service;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 新增
    */
    @Service
    public class ElasticsearchSaveServiceImp implements ElasticsearchSaveService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param entities : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】
    • @return T 反参对象
    • @explain : 添加文档
    • @Author Mhh
    • @Date 2021/12/27 10:55
      */
      @Override
      public <T> Iterable<T> save(Iterable<T> entities) {
      return elasticsearchRestTemplate.save(entities);

    }

    /**

    • @param t : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】
    • @return T 反参对象
    • @explain : 添加文档
    • @Author Mhh
    • @Date 2021/12/27 10:55
      */

    @Override
    public <T> T save(T t) {
    return elasticsearchRestTemplate.save(t);
    }

  }
  
  

  ---

   

  save 添加文档测试结果：

  
  

  
  

  • 根据被ES注解引用的入参对象存入相应索引中
    
    

  
  

  import com.it.mhh.elasticsearch.controller.ElasticsearchSaveController;
  
  import com.it.mhh.elasticsearch.entity.Headmaster;
  
  import com.it.mhh.elasticsearch.entity.Student;
  
  import com.it.mhh.elasticsearch.entity.Teacher;
  
  import org.junit.Test;
  
  import org.junit.runner.RunWith;
  
  import org.springframework.beans.factory.annotation.Autowired;
  
  import org.springframework.boot.test.context.SpringBootTest;
  
  import org.springframework.data.elasticsearch.core.completion.Completion;
  
  import org.springframework.test.context.junit4.SpringRunner;
  
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 测试
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSaveControllerTest {

    @Autowired
    private ElasticsearchSaveController elasticsearchSaveController;

    /**

    • @param entities : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】

    • @return T 反参对象

    • @explain : 添加文档

    • @Author Mhh

    • @Date 2021/12/27 10:55
      */
      @Test
      public void savesStudentES() {

      Headmaster headmaster = new Headmaster(“1”, “小白主任”, “山东”, 7500, Arrays.asList(“一班”, “二班”), new Date());//班主任
      List<String> colorList = new ArrayList<>();//颜色
      colorList.add(“red”);
      colorList.add(“white”);
      colorList.add(“black”);

      List<Teacher> teacherList = new ArrayList<>();//所有科目老师
      teacherList.add(new Teacher(“2”, “小黑”, “black”, “一班”, “山东省济南市历下区”, 13, new Date()));
      teacherList.add(new Teacher(“2”, “小蓝”, “blue”, “二班”, “山东省菏泽市单县”, 14, new Date()));

      Student student = new Student(“1”, “mhh”, “济南”, 12, new Date(), headmaster, new String[]{“语文”, “数学”, “英语”}, colorList, teacherList);
      Student save = elasticsearchSaveController.save(student);
      System.out.println(save);
      }

    /**

    • @param entities : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】

    • @return T 反参对象

    • @explain : 添加文档

    • @Author Mhh

    • @Date 2021/12/27 10:55
      */
      @Test
      public void savesTeacherES() {

      Teacher teacher = new Teacher(“1”, “小黑老师”, “black”, “一班”, “河北省保定市莲池区”, 14, new Date());
      Teacher save = elasticsearchSaveController.save(teacher);
      System.out.println(save);
      }

    /**

    • @param entities : 入参对象(必须是被@Document注解注释的)【入参 可传单个 T，集合Iterable<T>，可变参 T… 】

    • @return T 反参对象

    • @explain : 添加文档

    • @Author Mhh

    • @Date 2021/12/27 10:55
      */
      @Test
      public void savesTeacherListES() {

      List<Teacher> teacherList = new ArrayList<>();
      teacherList.add(new Teacher(“1”, “小黑老师”, “black”, “一班”, “山东省泰安市岱岳区”,“且随疾风前行,身后亦须留心”, 15, new Date(), new Completion(new String[]{“山东省泰安市岱岳区”})));
      teacherList.add(new Teacher(“2”, “小白老师”, “white”, “二班”, “山东省济南市历下区”, “此剑之势,愈斩愈烈”,17, new Date(), new Completion(new String[]{“山东省济南市历下区”})));
      teacherList.add(new Teacher(“3”, “小黄老师”, “yellow”, “二班”, “河北省保定市莲池区”, “荣耀存于心,而非流于形”,18, new Date(), new Completion(new String[]{“河北省保定市莲池区”})));
      teacherList.add(new Teacher(“5”, “小蓝教授”, “blue”, “二班”, “山东省济南市高新区”, “吾之初心,永世不忘”,21, new Date(), new Completion(new String[]{“山东省济南市高新区”})));
      teacherList.add(new Teacher(“4”, “小绿教授”, “green”, “一班”, “山西省太原市杏花岭区”, “有些失误无法犯两次”,24, new Date(), new Completion(new String[]{“山西省太原市杏花岭区”})));
      Iterable<Teacher> save = elasticsearchSaveController.save(teacherList);
      System.out.println(save);
      }

  }

  ---

   

  6.elasticsearchRestTemplate 删除

• 6.1 deleteIndex 删除索引

• • deleteIndex ：删除索引(数据库)

  ---

  deleteIndex 删除索引测试

  • 入参classType : 删除的哪个索引(从传入对象中的@Document注解中indexName属性获取)

• 6.1.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchDeleteService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.query.Query;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  

• /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 删除类
    */
    @RestController
    @RequestMapping(“/elasticSearch/delete”)
    public class ElasticsearchDeleteController {

    @Autowired
    private ElasticsearchDeleteService elasticsearchDeleteService;

    /**

    • @param clazz : 删除的哪个索引(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain : 删除索引
    • @Author Mhh
    • @Date 2021/12/27 14:27
      */
      @PostMapping(“deleteIndex”)
      public Boolean deleteIndex(Class<?> clazz) {
      return elasticsearchDeleteService.deleteIndex(clazz);
      }
      }
      

    ---

     

    6.1.2 service层

    import org.springframework.data.elasticsearch.core.query.Query;
    

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchDeleteService {

    /**

    • @param clazz : 删除的哪个索引(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain : 删除索引
    • @Author Mhh
    • @Date 2021/12/27 14:27
      */
      public Boolean deleteIndex(Class<?> clazz);
      }

  ---

   

  6.1.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchDeleteService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.query.Query;
  import org.springframework.stereotype.Service;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchDeleteServiceImp implements ElasticsearchDeleteService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param clazz : 删除的哪个索引(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain : 删除索引
    • @Author Mhh
    • @Date 2021/12/27 14:27
      */

    public Boolean deleteIndex(Class<?> clazz) {
    return elasticsearchRestTemplate.deleteIndex(clazz);
    }

  }

  ---

   

  deleteIndex 删除索引测试结果：

  • 根据入参对象 ES@Document注解中indexName属性值删除索引
  • 如果删除的 索引名不存在 返回false
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchDeleteController;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.index.query.QueryBuilders;
  import org.elasticsearch.index.query.TermsQueryBuilder;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.test.context.junit4.SpringRunner;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchDeleteControllerTest {

    @Autowired
    private ElasticsearchDeleteController elasticsearchDeleteController;

    /**

    • @param clazz : 删除的哪个索引(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain : 删除索引
    • @Author Mhh
    • @Date 2021/12/27 14:27
      */

    @Test
    public void deleteIndex() {
    Boolean aBoolean = elasticsearchDeleteController.deleteIndex(Teacher.class);
    System.err.println(aBoolean);
    }
    }

  ---

• 6.2 delete 删除文档(通过主键删除)

• • delete(Object entity):通过入参对象主键删除
  • delete(String id, Class<?> entityType) id表示要删除的主键，entityType表示 被@Document注解且有indexName属性值(indexName属性值为索引名)

  ---

  delete(通过主键删除) 删除文档测试

  • 两种入参形式 都是通过主键id删除,即使入参对象其它属性设置了值也是通过主键id删除

• 6.2.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchDeleteService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.query.Query;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  

• /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 删除类
    */
    @RestController
    @RequestMapping(“/elasticSearch/delete”)
    public class ElasticsearchDeleteController {

    @Autowired
    private ElasticsearchDeleteService elasticsearchDeleteService;

    /**

    • @param id : 要删除的主键id
    • @param entityType : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */
      @PostMapping(“deleteById”)
      public Boolean delete(@RequestParam(“id”) String id, Class<?> entityType) {
      return elasticsearchDeleteService.delete(id, entityType);
      }

    /**

    • @param entity : 这个实体对象必须是被@Document注解且有indexName属性值) 以及主键必须有值,其它参数有无都没关系(和用主键id删除没区别)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */
      @PostMapping(“delete”)
      public Boolean delete(Object entity) {
      return elasticsearchDeleteService.delete(entity);
      }

  }
  
  

  ---

   

  6.2.2 service层

  import org.springframework.data.elasticsearch.core.query.Query;
  
  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchDeleteService {

    /**

    • @param id : 要删除的主键id
    • @param entityType : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */
      Boolean delete(String id, Class<?> entityType);

    /**

    • @param entity : 这个实体对象必须是被@Document注解且有indexName属性值) 以及主键必须有值,其它参数有无都没关系(和用主键id删除没区别)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */

    public Boolean delete(Object entity);
    }

  ---

   

  6.2.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchDeleteService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.query.Query;
  import org.springframework.stereotype.Service;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchDeleteServiceImp implements ElasticsearchDeleteService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param id : 要删除的主键id
    • @param entityType : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */
      @Override
      public Boolean delete(String id, Class<?> entityType) {
      String delete = elasticsearchRestTemplate.delete(id, entityType);
      return true;
      }

    /**

    • @param entity : 这个实体对象必须是被@Document注解且有indexName属性值) 以及主键必须有值,其它参数有无都没关系(和用主键id删除没区别)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */
      @Override
      public Boolean delete(Object entity) {
      String delete = elasticsearchRestTemplate.delete(entity);
      return true;
      }
      }

  ---

   

  delete(通过主键删除) 删除文档测试结果：

  • 根据入参对象 ES@Document注解中indexName属性值查询删除哪哥索引中文档
  • 如果删除的指定索引名中的文档 索引名不存在 报错
  • 即使删除的文档不存在 ES依旧返回删除的主键
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchDeleteController;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.index.query.QueryBuilders;
  import org.elasticsearch.index.query.TermsQueryBuilder;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.test.context.junit4.SpringRunner;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchDeleteControllerTest {

    @Autowired
    private ElasticsearchDeleteController elasticsearchDeleteController;

    /**

    • @param entity : 这个实体对象必须是被@Document注解且有indexName属性值) 以及主键必须有值,其它参数有无都没关系(和用主键id删除没区别)
    • @return java.lang.Boolean
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:40
      */
      @Test
      public void deleteByIdES() {
      Teacher teacher = new Teacher();
      teacher.setTId(“3”);
      teacher.setTName(“mhh”);//没有用处,根据主键删除
      Boolean delete = elasticsearchDeleteController.delete(teacher);
      //==
      Boolean aBoolean = elasticsearchDeleteController.delete(“3”, Teacher.class);
      System.err.println(aBoolean);//true
      }
      }

  ---

• 6.3 delete 删除文档(删除通过query所搜索到的所有数据)

• • delete(Query query, Class<?> clazz, IndexCoordinates index)
              query:查询语法 包含(term查询、terms查询、match查询、范围查询、模糊查询…)
              clazz: 来指定查询字段和结果后返回的实例对象
              indx: 指定索引

  ---

  delete(删除通过query所搜索到的所有数据) 删除文档测试

  • 删除掉被query所搜索到的所有数据。

• 6.3.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchDeleteService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.query.Query;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  

• /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 删除类
    */
    @RestController
    @RequestMapping(“/elasticSearch/delete”)
    public class ElasticsearchDeleteController {

    @Autowired
    private ElasticsearchDeleteService elasticsearchDeleteService;

    /**

    • @param query : 删除掉被query所搜索到的所有数据。
    • @param entity : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain :
    • @Author Mhh
    • @Date 2021/12/27 14:22
      */

    @PostMapping(“deleteByQuery”)
    public Boolean delete(Query query, Class<?> entity) {
    return elasticsearchDeleteService.delete(query, entity);
    }

  }
  
  

  ---

   

  6.3.2 service层

  import org.springframework.data.elasticsearch.core.query.Query;
  
  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchDeleteService {

    /**

    • @param query : 删除掉被query所搜索到的所有数据。
    • @param entity : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain :
    • @Author Mhh
    • @Date 2021/12/27 14:22
      */

    public Boolean delete(Query query, Class<?> entity);

  }

  ---

   

  6.3.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchDeleteService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.query.Query;
  import org.springframework.stereotype.Service;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchDeleteServiceImp implements ElasticsearchDeleteService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param query : 删除掉被query所搜索到的所有数据。
    • @param entity : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain :
    • @Author Mhh
    • @Date 2021/12/27 14:22
      */

    public Boolean delete(Query query, Class<?> entity) {
    elasticsearchRestTemplate.delete(query, entity, elasticsearchRestTemplate.getIndexCoordinatesFor(entity));
    return true;
    }

  }

  ---

   

  delete(删除通过query所搜索到的所有数据) 删除文档测试结果：

  • 通过match词条分词 取并集查询后 结果被删除
  • ik_smart: 粗粒度分词 山东省济南市 被分为(“山东省”,“济南市”)
  • 只要tAddress字段里包含 山东省和济南市 就会被查询到 然后被删除
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchDeleteController;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.index.query.QueryBuilders;
  import org.elasticsearch.index.query.TermsQueryBuilder;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.test.context.junit4.SpringRunner;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchDeleteControllerTest {

    @Autowired
    private ElasticsearchDeleteController elasticsearchDeleteController;

    /**

    • @param query : 删除掉被query所搜索到的所有数据。
    • @param entity : 删除的哪个索引的数据(从传入对象中的@Document注解中indexName属性获取)
    • @return java.lang.Boolean
    • @explain :
    • @Author Mhh
    • @Date 2021/12/27 14:22
      */
      @Test
      public void deleteByQuery() {
      //查询条件(词条查询：对应ES query里的match)
      MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery(“tAddress”, “山东省济南市”).operator(Operator.AND).analyzer(“ik_smart”);
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(matchQueryBuilder);
      Boolean aBoolean = elasticsearchDeleteController.delete(nativeSearchQuery, Teacher.class);
      System.err.println(aBoolean);
      }
      }

  ---

   

  7.elasticsearchRestTemplate 修改

• 7.1 update 修改文档(根据主键修改)

• • update(UpdateQuery query, IndexCoordinates index)
               query:要修改参数的主键及修改值
               index:指定索引
  • bulkUpdate(List<UpdateQuery>queries, IndexCoordinates index):批量修改

  ---

  update 修改文档(根据主键修改)测试

  • id: 表示要修改哪个文档(_id)
  • object：要修改的值对象(这里的对象最终都会转成Map)注意 这里属性值如果是空或null的话 那么也会被更新
                 用的 hutool-core转map(版本高一些，低版本的 如果传的就是Map类型,在map转map时会报错 – 5.7.13)
  • classType : 修改的哪个索引实体 (主要是获取对象里面@Document注解indexName属性获取修改哪个索引里的数据

• 7.1.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchUpdateService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.*;
  

• /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 修改类
    */
    @RestController
    @RequestMapping(“/elasticSearch/update”)
    public class ElasticsearchUpdateController {

    @Autowired
    private ElasticsearchUpdateService elasticsearchUpdateService;

    /**

    • @param id : 主键id(es里的_id)
    • @param object : 要修改的数据(这里的值都会转成Map)注意 这里入参如果是空或null的话 那么也会被更新
    • // 用的 hutool-core转map(版本高一些，低版本的 如果传的就是Map类型,在map转map时会报错 – 5.7.13)
    • @param classType : 修改的哪个索引实体 (主要是获取对象里面@Document注解indexName属性获取修改哪个索引里的数据
    • @return java.lang.Boolean
    • @explain : 根据主键修改数据
    • @Author Mhh
    • @Date 2021/12/27 11:16
      */

    @PostMapping(“update”)
    public Boolean update(@RequestParam(“id”) String id, @RequestBody Object object, Class<?> classType) {
    return elasticsearchUpdateService.update(id, object, classType);
    }
    }

  ---

   

  7.1.2 service层

  /**
   * @创建人: Mhh
   * @创建时间: 2021/12/10
   * @描述: 修改
   */
  public interface ElasticsearchUpdateService {
  /**
   * @param id        : 主键id(es里的_id)
   * @param object    : 要修改的数据(这里的值都会转成Map)注意 这里入参属性值如果是空或null的话 那么也会被更新
   * //                      用的 hutool-core转map(版本高一些，低版本的 如果传的就是Map类型,在map转map时会报错  -- 5.7.13)
   * @param classType : 修改的哪个索引实体 (主要是获取对象里面@Document注解indexName属性获取修改哪个索引里的数据
   * @return java.lang.Boolean
   * @explain :  根据主键修改数据
   * @Author Mhh
   * @Date 2021/12/27 11:16
   */
  
  Boolean update(String id, Object object, Class<?> classType);
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  7
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  12
  

  }

  ---

   

  7.1.3 serviceimpl层

  import cn.hutool.core.bean.BeanUtil;
  import com.it.mhh.elasticsearch.service.ElasticsearchUpdateService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.UpdateQuery;
  import org.springframework.data.elasticsearch.core.query.UpdateResponse;
  import org.springframework.stereotype.Service;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 修改
    */
    @Service
    public class ElasticsearchUpdateServiceImp implements ElasticsearchUpdateService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param id : 主键id(es里的_id)
    • @param object : 要修改的数据(这里的值都会转成Map)注意 这里入参如果是空或null的话 那么也会被更新
    • // 用的 hutool-core转map(版本高一些，低版本的 如果传的就是Map类型,在map转map时会报错 – 5.7.13)
    • @param classType : 修改的哪个索引实体 (主要是获取对象里面@Document注解indexName属性获取修改哪个索引里的数据
    • @return java.lang.Boolean
    • @explain : 根据主键修改数据
    • @Author Mhh
    • @Date 2021/12/27 11:16
      */

    @Override
    public Boolean update(String id, Object object, Class<?> classType) {
    UpdateQuery.Builder builder = UpdateQuery.builder(id)
    .withDocument(org.springframework.data.elasticsearch.core.document.Document.from(BeanUtil.beanToMap(object)));
    IndexCoordinates of = IndexCoordinates.of(classType.getAnnotation(Document.class).indexName());
    UpdateResponse update = elasticsearchRestTemplate.update(builder.build(), of);
    return true;
    }

  }

  ---

   

  update 修改文档(根据主键修改)测试结果：

  • 据主键id修改(这里如果修改时没找到主键id就会报错)
  • 这里可以复用es的插入(存入时es里已经有此主键就是修改，没有就是新增)
  • 注意属性值是否为null值 es不会分辨 只会更新(即使是null值也会更新)
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.controller.ElasticsearchUpdateController;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.test.context.junit4.SpringRunner;
  import java.util.HashMap;
  import java.util.Map;
  

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchUpdateControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;
    @Autowired
    private ElasticsearchUpdateController elasticsearchUpdateController;

    /*

    • 根据主键id修改(这里如果修改时没找到主键id就会报错)[这里可以复用es的插入(存入时es里已经有此主键就是修改，没有就是删除)]
    • */

    @Test
    public void updateByIdES() {
    Teacher teacher = elasticsearchSelectController.get(“2”, Teacher.class);
    //Teacher(tId=2, tName=小白老师, tEnglishName=white, tClassName=二班, tAddress=山东省济南市历下区, tFamous=此剑之势,愈斩愈烈, tAge=17, tCreateTime=Wed Dec 29 14:20:50 CST 2021, completion=org.springframework.data.elasticsearch.core.completion.Completion@6cd2cb2)
    System.err.println(teacher);
    Map<String, Object> map = new HashMap<>();
    map.put(“tName”, “mhh”);
    map.put(“tAge”, 11);
    map.put(“tAddress”,null);
    Boolean aBoolean = elasticsearchUpdateController.update(“2”, map, Teacher.class);//这里建议用map形式的(主要是它不能像sql智能,校验null:如果传了字段是null，那么就会修改成为null)
    System.err.println(aBoolean);//true
    teacher = elasticsearchSelectController.get(“2”, Teacher.class);
    //Teacher(tId=2, tName=mhh, tEnglishName=white, tClassName=二班, tAddress=null, tFamous=此剑之势,愈斩愈烈, tAge=11, tCreateTime=Wed Dec 29 14:20:50 CST 2021, completion=org.springframework.data.elasticsearch.core.completion.Completion@1d1cfe4)
    System.err.println(teacher);
    }

  }

  ---

   

  8.elasticsearchRestTemplate 查询

• 8.1 get 查询文档(根据主键查询)

• • get(String id, Class<?> clazz)
         id:文档主键
         clazz:类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])

  ---

  get 查询文档(根据主键查询)测试

  • 根据主键id查询数据

• 8.1.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return T
    • @explain : 根据主键id查询数据
    • @Author Mhh
    • @Date 2021/12/10 10:46
      */
      @PostMapping(“get”)
      public <T> T get(String id, Class<T> classType) {
      return elasticsearchSelectService.get(id, classType);
      }
      }
      

    ---

     

    8.1.2 service层

    import org.elasticsearch.client.indices.AnalyzeResponse;
    

  import org.elasticsearch.index.query.Operator;
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return T
    • @explain : 根据主键id查询数据
    • @Author Mhh
    • @Date 2021/12/10 10:46
      */
      public <T> T get(String id, Class<T> classType);

  }

  ---

   

  8.1.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return T
    • @explain : 根据主键id查询数据
    • @Author Mhh
    • @Date 2021/12/10 10:46
      */
      @Override
      public <T> T get(String id, Class<T> classType) {
      T t = elasticsearchRestTemplate.get(id, classType);
      return t;
      }

  }

  ---

   

  get 查询文档(根据主键查询)测试结果：

  • 根据主键id查询结果
  • 获取不到就是null

  
  
  

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    @Test
    public void selectByIdES() {
    Teacher teacher = elasticsearchSelectController.get(“2”, Teacher.class);
    System.err.println(teacher);//Teacher(tId=2, tName=小白老师, tAge=17, tCreateTime=Sat Dec 04 10:43:34 CST 2021)

     Student student = elasticsearchSelectController.get("1", Student.class);
     System.err.println(student);
                 /*Student
                      (sId=1, sName=mhh, sAddress=济南, sAge=12, sCreateTime=Sat Dec 04 10:34:14 CST 2021,
                         sHeadmaster=Headmaster(hId=1, hName=小白主任, hAddress=山东, hSalary=7500, hClass=[一班, 二班], hCreateTime=Sat Dec 04 10:34:14 CST 2021),
                           sCourseList=[语文, 数学, 英语],
                             sColorList=[red, white, black],
                               sTeacherList=[Teacher(tId=2, tName=小黑, tAge=13, tCreateTime=Sat Dec 04 10:34:14 CST 2021), Teacher(tId=2, tName=小蓝, tAge=14, tCreateTime=Sat Dec 04 10:34:14 CST 2021)])*/
    
     Student nullStudent = elasticsearchSelectController.get("11", Student.class);//测试没有此主键的查询
     System.err.println(nullStudent); // null
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11

    }

  }

  ---

• 8.2 exists 查询文档(判断主键id是否存在)

• • exists(String id, Class<?> clazz)
            id:文档主键
            clazz:类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
  • exists(String id, IndexCoordinates index)
            id:文档主键
            index:指定索引

  ---

  exists 查询文档(判断主键id是否存在)测试

  • 根据主键id查询索引中是否存在此文档

• 8.2.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return java.lang.Boolean
    • @explain : 判断主键id是否存在
    • @Author Mhh
    • @Date 2021/12/29 14:54
      */

    @PostMapping(“exists”)
    public Boolean exists(String id, Class<?> classType) {
    return elasticsearchSelectService.exists(id, classType);
    }

  }
  
  

  ---

   

  8.2.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return java.lang.Boolean
    • @explain : 判断主键id是否存在
    • @Author Mhh
    • @Date 2021/12/29 14:54
      */

    public Boolean exists(String id, Class<?> classType);

  }

  ---

   

  8.2.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return java.lang.Boolean
    • @explain : 判断主键id是否存在
    • @Author Mhh
    • @Date 2021/12/29 14:54
      */

    @Override
    public Boolean exists(String id, Class<?> classType) {
    return elasticsearchRestTemplate.exists(id, classType);
    }

  }

  ---

   

  exists 查询文档(判断主键id是否存在)测试结果：

  • 根据主键id判断此索引中是否有此文档(有返回true,没有返回false)
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param id : 主键id
    • @param classType : 类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
    • @return java.lang.Boolean
    • @explain : 判断主键id是否存在
    • @Author Mhh
    • @Date 2021/12/29 14:54
      */
      @Test
      public void exists() {
      Boolean exists = elasticsearchSelectController.exists(“11”, Teacher.class);
      System.err.println(exists);//false
      }

  }

  ---

• 8.3 queryForPage 查询文档(分页查询)

• • queryForPage(Query query, Class<?> clazz, IndexCoordinates index)
            query:查询语法 包含(term查询、terms查询、match查询、范围查询、模糊查询…)
            clazz:类对象(用来获取这个对象中的@Document注解中indexName属性[表示查询那个索引])
            index:指定索引

  ---

  queryForPage 查询文档(分页查询)测试

  • NativeSearchQueryBuilder withPageable(Pageable pageable)
  • 构建Pageable 对象 进行分页
  • 添加分页信息 不设置 默认10条(用查询条件构建器)

• 8.3.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param pageNum : 分页查询的页数
    • @param pageSize : 分页查询返回的每页个数
    • @param key : 查询es的字段名
    • @param value : 要查询字段名中的值
    • @param classType : 返回的类类型
    • @return List<T></T>
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:36
      */
      @PostMapping(“selectFindPage”)
      public <T> List<T> selectFindPage(Integer pageNum, Integer pageSize, String key, String value, Class<T> classType) {
      return elasticsearchSelectService.selectFindPage(pageNum, pageSize, key, value, classType);
      }

  }
  
  

  ---

   

  8.3.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param pageNum : 分页查询的页数
    • @param pageSize : 分页查询返回的每页个数
    • @param key : 查询es的字段名
    • @param value : 要查询字段名中的值
    • @param classType : 返回的类类型
    • @return List<T></T>
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:36
      */
      public <T> List<T> selectFindPage(Integer pageNum, Integer pageSize, String key, String value, Class<T> classType);

  }

  ---

   

  8.3.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param pageNum : 分页查询的页数

    • @param pageSize : 分页查询返回的每页个数

    • @param key : 查询es的字段名

    • @param value : 要查询字段名中的值

    • @param classType : 返回的类类型

    • @return List<T></T>

    • @throws

    • @Author Mhh

    • @Date 2021/12/9 10:36
      */
      public <T> List<T> selectFindPage(Integer pageNum, Integer pageSize, String key, String value, Class<T> classType) {

      NativeSearchQueryBuilder nativeSearchQueryBuilder = new NativeSearchQueryBuilder();
      MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery(key, value).analyzer(“ik_smart”);//分词查询(这里指定分词只是分传过来的参数)[它是要和es索引里的分词后数据一一对应才能返回]
      /例子：前台传了 (山东省:粗粒度分为山东省 细粒度分为：山东省,山东,省)
      es索引库里(山东省济南市 粗粒度分为 山东省,济南市 细粒度分为:山东省,山东,省,济南市,济南,市)
      只有当前台分的词和后台分的词能有一个匹配上就可以/
      nativeSearchQueryBuilder.withQuery(matchQueryBuilder);
      nativeSearchQueryBuilder.withPageable(PageRequest.of(pageNum == null || pageNum == 0 ? 0 : pageNum - 1, pageSize));
      //4.构建查询对象
      NativeSearchQuery query = nativeSearchQueryBuilder.build();

      IndexCoordinates of = IndexCoordinates.of(classType.getAnnotation(Document.class).indexName());
      AggregatedPage<T> page = elasticsearchRestTemplate.queryForPage(query, classType, of);
      long totalElements = page.getTotalElements(); // 总记录数
      int totalPages = page.getTotalPages(); // 总页数
      int pageNumber = page.getPageable().getPageNumber(); // 当前页号
      List<T> beanList = page.toList(); // 当前页数据集
      Set<T> beanSet = page.toSet(); // 当前页数据集
      return page.getContent();

    }

  }

  ---

   

  queryForPage 查询文档(分页查询)测试结果：

  • match分词查询 默认并集 ES索引中可看出符合的有两条，最终通过分页返回一条
    

  

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param pageNum : 分页查询的页数
    • @param pageSize : 分页查询返回的每页个数
    • @param key : 查询es的字段名
    • @param value : 要查询字段名中的值
    • @param classType : 返回的类类型
    • @return List<T></T>
    • @throws
    • @Author Mhh
    • @Date 2021/12/9 10:36
      */
      @Test
      public void selectFindPage() {
      List<Teacher> teacherList = elasticsearchSelectController.selectFindPage(1, 1, “tAddress”, “山东省”, Teacher.class);
      System.out.println(teacherList.size());// 1
      }

  }

  ---

• 8.4 AnalyzeRequest (根据入参内容返回分词后结果)

• • tokenizer: 选择粗细粒度分词器
  • text: 需要分词的内容

  ---

  AnalyzeRequest (根据入参内容返回分词后结果)测试

  • 粗粒度分词器:ik_smart
               粗粒度分词—北京天安门：[北京,天安门]
  • 细粒度分词器:ik_max_word
               细粒度分词—北京天安门：[北京,天安门,天安,门]

• 8.4.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param tokenizer : 粗细粒度分词(粗粒度:ik_smart 细粒度:ik_max_word)
    • @param text : 需要分词的入参
    • @return java.util.List<org.elasticsearch.client.indices.AnalyzeResponse.AnalyzeToken>
    • @throws
    • @explain
    • @Author Mhh
    • @Date 2021/12/9 16:16
      */
      @PostMapping(“selectBreakUpText”)
      public List<AnalyzeResponse.AnalyzeToken> selectBreakUpText(String tokenizer, String text) throws NoSuchFieldException, IllegalAccessException, IOException {
      return elasticsearchSelectService.selectBreakUpText(tokenizer, text);
      }

  }
  
  

  ---

   

  8.4.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param tokenizer : 粗细粒度分词(粗粒度:ik_smart 细粒度:ik_max_word)
    • @param text : 需要分词的入参
    • @return java.util.List<org.elasticsearch.client.indices.AnalyzeResponse.AnalyzeToken>
    • @throws
    • @explain
    • @Author Mhh
    • @Date 2021/12/9 16:16
      */
      public List<AnalyzeResponse.AnalyzeToken> selectBreakUpText(String tokenizer, String text) throws NoSuchFieldException, IllegalAccessException, IOException;

  }

  ---

   

  8.4.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param tokenizer : 粗细粒度分词(粗粒度:ik_smart 细粒度:ik_max_word)
    • @param text : 需要分词的入参
    • @return java.util.List<org.elasticsearch.client.indices.AnalyzeResponse.AnalyzeToken>
    • @throws
    • @explain
    • @Author Mhh
    • @Date 2021/12/9 16:16
      */
      public List<AnalyzeResponse.AnalyzeToken> selectBreakUpText(String tokenizer, String text) throws IOException {
      RestHighLevelClient restHighLevelClient = elasticsearchRestTemplate.execute((client) -> client);
      AnalyzeRequest request = AnalyzeRequest.buildCustomAnalyzer(tokenizer).build(text);
      AnalyzeResponse response = restHighLevelClient.indices().analyze(request, RequestOptions.DEFAULT);
      return response.getTokens();
      //-------------------------------这两种都可以---------------------------------------------------------------------
      // AnalyzeRequest request = AnalyzeRequest.buildCustomAnalyzer(tokenizer).build(text);
      // Class<? extends ElasticsearchRestTemplate> aClass = elasticsearchRestTemplate.getClass();//反射
      // Field client = aClass.getDeclaredField(“client”);//获得 ElasticsearchRestTemplate里的client属性
      // client.setAccessible(true);//私有权限解除
      // RestHighLevelClient restHighLevelClient = (RestHighLevelClient) client.get(elasticsearchRestTemplate);
      // AnalyzeResponse response = restHighLevelClient.indices().analyze(request, RequestOptions.DEFAULT);
      // return response.getTokens();
      }

  }

  ---

   

  AnalyzeRequest (根据入参内容返回分词后结果)测试结果：

  • 通过查询分词后结果来校验 分词后查询文档返回的解果是否正确
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param tokenizer : 粗细粒度分词(粗粒度:ik_smart 细粒度:ik_max_word)
    • @param text : 需要分词的入参
    • @return java.util.List<org.elasticsearch.client.indices.AnalyzeResponse.AnalyzeToken>
    • @throws
    • @explain
    • @Author Mhh
    • @Date 2021/12/9 16:16
      */
      @Test
      public void breakUpText() throws IllegalAccessException, NoSuchFieldException, IOException {
      List<AnalyzeResponse.AnalyzeToken> maxAnalyzeTokens = elasticsearchSelectController.selectBreakUpText(“ik_max_word”, “北京天安门”);//细粒度分词
      List<AnalyzeResponse.AnalyzeToken> smartAnalyzeTokens = elasticsearchSelectController.selectBreakUpText(“ik_smart”, “北京天安门”);//粗粒度分词
      System.err.println(“maxAnalyzeTokens细粒度的size:” + maxAnalyzeTokens.size() + “\n” + “smartAnalyzeTokens粗粒度的size:” + smartAnalyzeTokens.size());
      }

  }

  ---

• 8.5 termQuery 查询文档(入参不分词，精确匹配)

• • termsQuery(String name, Object… values)
  • termsQuery(String name, String… values)
  • termsQuery(String name, long… values)
  • termsQuery(String name, int… values)
  • …
            name: 域(字段名)
            values:一域多值, 查询的值

  ---

  termQuery 查询文档(入参不分词，精确匹配)测试

  • 入参不分词 会查询ES索引中文档(如果ES中索引文档被分词.只要匹配到词条就可以返回)
  • values：一域多值(只要匹配到一个值就可以返回)

• 8.5.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param values : 一域多值, 查询的值
    • @return java.util.List<T>
    • @explain :词条查询：不分词，精确匹配
    • @Author Mhh
    • @Date 2021/12/10 14:28
      */
      @PostMapping(“termQuery”)
      public <T> List<T> termQuery(String key, Class<T> classType, String… values) {
      return elasticsearchSelectService.termQuery(key, classType, values);
      }

  }
  
  

  ---

   

  8.5.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param values : 一域多值, 查询的值
    • @return java.util.List<T>
    • @explain :词条查询(不分前端传过来的数据)
    • @Author Mhh
    • @Date 2021/12/10 14:28
      */
      public <T> List<T> termQuery(String key, Class<T> classType, String… values);

  }

  ---

   

  8.5.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param values : 一域多值, 查询的值
    • @return java.util.List<T>
    • @explain :词条查询(不分前端传过来的数据)
    • @Author Mhh
    • @Date 2021/12/10 14:28
      */
      public <T> List<T> termQuery(String key, Class<T> classType, String… values) {
      //查询条件(词条查询：对应ES query里的term)
      TermsQueryBuilder termsQueryBuilder = QueryBuilders.termsQuery(key, values);
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(termsQueryBuilder);
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());

    }

  }

  ---

   

  termQuery 查询文档(入参不分词，精确匹配)测试结果：

  • term查询，查询text类型字段时，只有其中的单词相匹配都会查到，text字段会对数据进行分词
  • term查询，查询keyword类型字段时，只有完全匹配才会查到，keyword字段不会对数据进行分词
  • term query会去倒排索引中寻找确切的term，它并不知道分词器的存在。这种查询适合keyword 、numeric、date
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param values : 一域多值, 查询的值
    • @return java.util.List<T>
    • @explain :词条查询：不分词，精确匹配
    • @Author Mhh
    • @Date 2021/12/10 14:28
      */
      @Test
      public void termQuery() {
      List<Teacher> teacherList = elasticsearchSelectController.termQuery(“tAddress”, Teacher.class, “泰安市”, “河北省”);
      teacherList.forEach(System.err::println);
      }

  }

  ---

• 8.6 match 查询文档(会对查询条件进行分词)

• • matchQuery(String name, Object text)
            name: 域(字段名)
            text: 要查询的入参值

  ---

  match查询文档(会对查询条件进行分词)测试

  • 会对查询条件进行分词。
  • 将分词后的查询条件和词条进行等值匹配
  • 默认取并集（OR）

• 8.6.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • 入参分词: 山东省济南市 ik_smart粗粒度:[山东省,济南市] ik_max_word细粒度:[山东省,山东,省,济南市,济南,南市]
    • @param operator : Operator.OR(并集) [默认] 只要分的词有一个和索引字段上对应上则就返回

    •              Operator.AND(交集)   分的词全部满足的数据返回
      1

    • @param analyzer : 选择分词器[ik_smart粗粒度,ik_max_word细粒度] 默认:ik_max_word细粒度
    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param text : 查询的值
    • @return java.util.List<T>
    • @explain ：matchQuery:词条分词查询(会对查询条件进行分词)
    • @Author Mhh
    • @Date 2021/12/10 15:21
      */
      @PostMapping(“matchQuery”)
      public <T> List<T> matchQuery(Operator operator, String analyzer, String key, Class<T> classType, String text) {
      return elasticsearchSelectService.matchQuery(operator, analyzer, key, classType, text);
      }

  }
  
  

  ---

   

  8.6.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • 入参分词: 山东省济南市 ik_smart粗粒度:[山东省,济南市] ik_max_word细粒度:[山东省,山东,省,济南市,济南,南市]
    • @param operator : Operator.OR(并集) [默认] 只要分的词有一个和索引字段上对应上则就返回

    •              Operator.AND(交集)   分的词全部满足的数据返回
      1

    • @param analyzer : 选择分词器[ik_smart粗粒度,ik_max_word细粒度] 默认:ik_max_word细粒度
    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param text : 查询的值
    • @return java.util.List<T>
    • @explain ：matchQuery:词条分词查询(会对查询条件进行分词)
    • @Author Mhh
    • @Date 2021/12/10 15:21
      */

    public <T> List<T> matchQuery(Operator operator, String analyzer, String key, Class<T> classType, String text);

  }

  ---

   

  8.6.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • 入参分词: 山东省济南市 ik_smart粗粒度:[山东省,济南市] ik_max_word细粒度:[山东省,山东,省,济南市,济南,南市]
    • @param operator : Operator.OR(并集) [默认] 只要分的词有一个和索引字段上对应上则就返回

    •              Operator.AND(交集)   分的词全部满足的数据返回
      1

    • @param analyzer : 选择分词器[ik_smart粗粒度,ik_max_word细粒度] 默认:ik_max_word细粒度
    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param text : 查询的值
    • @return java.util.List<T>
    • @explain ：matchQuery:词条分词查询(会对查询条件进行分词)
    • @Author Mhh
    • @Date 2021/12/10 15:21
      */
      public <T> List<T> matchQuery(Operator operator, String analyzer, String key, Class<T> classType, String text) {
      //查询条件(词条查询：对应ES query里的match)
      MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery(key, text).analyzer(analyzer).operator(operator);
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(matchQueryBuilder);
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());

    }

  }

  ---

   

  match 查询文档(会对查询条件进行分词)测试结果：

  • match query知道分词器的存在。并且理解是如何被分词的
  • Operator：
               Operator.AND:交集(表示被分词后的值都包含在域(字段)中就返回此数据)
               Operator.OR:  并集(表示被分词后的值只要有一个被包含在域(字段)中就返回此数据)

  
  

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • 入参分词: 山东省济南市 ik_smart粗粒度:[山东省,济南市] ik_max_word细粒度:[山东省,山东,省,济南市,济南,南市]
    • @param operator : Operator.OR(并集) [默认] 只要分的词有一个和索引字段上对应上则就返回

    •              Operator.AND(交集)   分的词全部满足的数据返回
      1

    • @param analyzer : 选择分词器[ik_smart粗粒度,ik_max_word细粒度] 默认:ik_max_word细粒度
    • @param key : es里索引的域(字段名)
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param text : 查询的值
    • @return java.util.List<T>
    • @explain ：matchQuery:词条分词查询(会对查询条件进行分词)
    • @Author Mhh
    • @Date 2021/12/10 15:21
      */
      @Test
      public void matchQuery() {
      List<Teacher> teacherList =
      elasticsearchSelectController.matchQuery(Operator.AND,
      “ik_smart”,
      “tAddress”,
      Teacher.class,
      “山东省济南市”);
      teacherList.forEach(System.err::println);
      }

  }

  ---

• 8.7 matchAllQuery 查询文档(查询此索引下所有文档)

• • matchAllQuery():匹配所有文档的查询。

  ---

  matchAllQuery 查询文档(查询此索引下所有文档)测试

  • 查询指定索引下所有文档 (默认十条)

• 8.7.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 返回索引库里所有数据
    • @Author Mhh
    • @Date 2021/12/10 15:44
      */
      @PostMapping(“matchAllQuery”)
      public <T> List<T> matchAllQuery(Class<T> classType) {
      return elasticsearchSelectService.matchAllQuery(classType);
      }

  }
  
  

  ---

   

  8.7.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 返回索引库里所有数据
    • @Author Mhh
    • @Date 2021/12/10 15:44
      */
      public <T> List<T> matchAllQuery(Class<T> classType);

  }

  ---

   

  8.7.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 返回索引库里所有数据
    • @Author Mhh
    • @Date 2021/12/10 15:44
      */
      public <T> List<T> matchAllQuery(Class<T> classType) {
      //查询条件(词条查询：对应ES query里的match)
      MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(matchAllQueryBuilder);
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());

    }

  }

  ---

   

  matchAllQuery 查询文档(查询此索引下所有文档)测试结果：

  • 通过入参对象里面@Document注解indexName属性获取查询哪个索引
  • 返回指定索引下所有文档

  

  

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 返回索引库里所有数据
    • @Author Mhh
    • @Date 2021/12/10 15:44
      */
      @Test
      public void matchAllQuery() {
      List<Teacher> teacherList = elasticsearchSelectController.matchAllQuery(Teacher.class);
      teacherList.forEach(System.err::println);
      }
      }

  ---

• 8.8 wildcardQuery 查询文档(模糊查询)

• • wildcardQuery(String name, String query)
                          name: 域名(字段名称)
                          query: 通配符查询字符串

  ---

  wildcardQuery 查询文档(模糊查询)测试

  • wildcard查询：会对查询条件进行分词,还可以使用通配符
  • ? : 任意单个字符
  • * : 0个或多个字符

• 8.8.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /*

    • ?:只包含一个字符

    •   山?省:  山东省 或者 山西省 等等   ?包含一个字符
      1

    •   ??省：  山东省 或者 吉林省 等等   ?包含一个字符
      1

    •   ???:    你好啊 或者 早上好 等等 ?包含一个字符
      1

    • *:表示0个或多个字符

    •   济南*： 济南市 或者 济南市历下区.....  *表示0个或多个字符
      1

    •   *剑 ：  长虹剑 或者 冰魄长虹倚天剑.... *表示0个或多个字符
      1

    • 注意: *或者?放在最前面(例如：*省 | ?省 *为 | ?为) 会引发全表(全索引)扫描 注意效率问题
    • */

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : wildcardQuery模糊查询(会对查询条件分词，还可以使用通配符)[?:表示任意单个字符][*:表示0或多个字符]
    • @Author Mhh
    • @Date 2021/12/10 16:10
      */

    @PostMapping(“wildcardQuery”)
    public <T> List<T> wildcardQuery(String key, String value, Class<T> classType) {
    return elasticsearchSelectService.wildcardQuery(key, value, classType);
    }

  }
  
  

  ---

   

  8.8.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /*

    • ?:只包含一个字符

    •   山?省:  山东省 或者 山西省 等等   ?包含一个字符
      1

    •   ??省：  山东省 或者 吉林省 等等   ?包含一个字符
      1

    •   ???:    你好啊 或者 早上好 等等 ?包含一个字符
      1

    • *:表示0个或多个字符

    •   济南*： 济南市 或者 济南市历下区.....  *表示0个或多个字符
      1

    •   *剑 ：  长虹剑 或者 冰魄长虹倚天剑.... *表示0个或多个字符
      1

    • 注意: *或者?放在最前面(例如：*省 | ?省 *为 | ?为) 会引发全表(全索引)扫描 注意效率问题
    • */

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : wildcardQuery模糊查询(会对查询条件分词，还可以使用通配符)[?:表示任意单个字符][*:表示0或多个字符]
    • @Author Mhh
    • @Date 2021/12/10 16:10
      */

    public <T> List<T> wildcardQuery(String key, String value, Class<T> classType);

  }

  ---

   

  8.8.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /*

    • ?:只包含一个字符

    •   山?省:  山东省 或者 山西省 等等   ?包含一个字符
      1

    •   ??省：  山东省 或者 吉林省 等等   ?包含一个字符
      1

    •   ???:    你好啊 或者 早上好 等等 ?包含一个字符
      1

    • *:表示0个或多个字符

    •   济南*： 济南市 或者 济南市历下区.....  *表示0个或多个字符
      1

    •   *剑 ：  长虹剑 或者 冰魄长虹倚天剑.... *表示0个或多个字符
      1

    • 注意: *或者?放在最前面(例如：*省 | ?省 *为 | ?为) 会引发全表(全索引)扫描 注意效率问题
    • */

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : wildcardQuery模糊查询(会对查询条件分词，还可以使用通配符)[?:表示任意单个字符][*:表示0或多个字符]
    • @Author Mhh
    • @Date 2021/12/10 16:10
      */

    public <T> List<T> wildcardQuery(String key, String value, Class<T> classType) {

     //查询条件(词条查询：对应ES query里的wildcard)
     WildcardQueryBuilder wildcardQueryBuilder = QueryBuilders.wildcardQuery(key, value);
     //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
     NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(wildcardQueryBuilder);
     //查询,获取查询结果
     SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
     //获取总记录数
     long totalHits = search.getTotalHits();
     //获取值返回
     return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10

    }

  }

  ---

   

  wildcardQuery 查询文档(模糊查询)测试结果：

  • "*华*" 包含华字的
  • "华*" 华字后边零个或多个字符
  • "华?" 华字后边一个字符
  • "*华"或"?华" 会引发全表（全索引）扫描 注意效率问题
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : wildcardQuery模糊查询(会对查询条件分词，还可以使用通配符)[?:表示任意单个字符][*:表示0或多个字符]
    • @Author Mhh
    • @Date 2021/12/10 16:10
      */

    @Test
    public void wildcardQuery() {
    List<Teacher> teacherList = elasticsearchSelectController.wildcardQuery(
    “tAddress”,
    “山?省”,
    Teacher.class);
    teacherList.forEach(System.err::println);
    }
    }

  ---

• 8.9 prefixQuery 查询文档(前缀查询)

• • prefixQuery(String name, String prefix)
                          name: 域名(字段名称)
                          prefix: 前缀值查询

  ---

  prefixQuery 查询文档(前缀查询)测试

  • 前缀查询 对keyword类型支持比较好

• 8.9.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : prefixQuery 前缀查询 对keyword类型支持比较好(text也能用:索引库字段分词后 分的词前缀要是能匹配也是可以返回此数据)
    • @Author Mhh
    • @Date 2021/12/10 16:49
      */

    @PostMapping(“prefixQuery”)
    public <T> List<T> prefixQuery(String key, String value, Class<T> classType) {
    return elasticsearchSelectService.prefixQuery(key, value, classType);
    }

  }
  
  

  ---

   

  8.9.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : prefixQuery 前缀查询 对keyword类型支持比较好(text也能用:索引库字段分词后 分的词前缀要是能匹配也是可以返回此数据)
    • @Author Mhh
    • @Date 2021/12/10 16:49
      */
      public <T> List<T> prefixQuery(String key, String value, Class<T> classType);
      }

  ---

   

  8.9.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param key : es里索引的域(字段名)

    • @param value : 查询的值

    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引

    • @return java.util.List<T>

    • @explain : prefixQuery 前缀查询 对keyword类型支持比较好(text也能用:索引库字段分词后 分的词前缀要是能匹配也是可以返回此数据)

    • @Author Mhh

    • @Date 2021/12/10 16:49
      */
      public <T> List<T> prefixQuery(String key, String value, Class<T> classType) {

      //查询条件(词条查询：对应ES query里的prefixQuery)
      PrefixQueryBuilder prefixQueryBuilder = QueryBuilders.prefixQuery(key, value);
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(prefixQueryBuilder);
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());

    }

  }

  ---

   

  prefixQuery 查询文档(前缀查询)测试结果：

  • text也能用:索引库字段分词后 分的词前缀要是能匹配也是可以返回此数据
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : prefixQuery 前缀查询 对keyword类型支持比较好(text也能用:索引库字段分词后 分的词前缀要是能匹配也是可以返回此数据)
    • @Author Mhh
    • @Date 2021/12/10 16:49
      */
      @Test
      public void prefixQuery() {
      List<Teacher> teacherList =
      elasticsearchSelectController.prefixQuery(
      “tAddress”,
      “济”,
      Teacher.class);
      teacherList.forEach(System.err::println);
      }
      }

  ---

• 8.10 regexpQuery 查询文档(正则表达式查询)

• • regexpQuery(String name, String regexp)
                          name: 域名(字段名称)
                          regexp: 正则表达式

  ---

  regexpQuery 查询文档(正则表达式查询)测试

  • 匹配包含具有指定正则表达式的术语的文档的查询
  • 菜鸟教程-正则表达式: 正则表达式 – 语法 | 菜鸟教程.

• 8.10.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 正则表达式查询:regexpQuery
    • @Author Mhh
    • @Date 2021/12/11 19:17
      */
      @PostMapping(“regexpQuery”)
      public <T> List<T> regexpQuery(String key, String value, Class<T> classType) {
      return elasticsearchSelectService.regexpQuery(key, value, classType);
      }

  }
  
  

  ---

   

  8.10.2 service层

  import org.elasticsearch.client.indices.AnalyzeResponse;
  
  import org.elasticsearch.index.query.Operator;
  
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 正则表达式查询:regexpQuery
    • @Author Mhh
    • @Date 2021/12/11 19:17
      */
      public <T> List<T> regexpQuery(String key, String value, Class<T> classType);

  }

  ---

   

  8.10.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 正则表达式查询:regexpQuery
    • @Author Mhh
    • @Date 2021/12/11 19:17
      */
      public <T> List<T> regexpQuery(String key, String value, Class<T> classType) {
      //查询条件(词条查询：对应ES query里的regexpQuery)
      RegexpQueryBuilder regexpQueryBuilder = QueryBuilders.regexpQuery(key, value);
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(regexpQueryBuilder);
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());
      }
      }

  ---

   

  regexpQuery 查询文档(正则表达式查询) 测试结果：

  • 正则查询取决于正则表达式的效率
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param key : es里索引的域(字段名)
    • @param value : 查询的值
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : 正则表达式查询:regexpQuery
    • @Author Mhh
    • @Date 2021/12/11 19:17
      /
      @Test
      public void regexpQuery() {
      List<Teacher> teacherEnglishNameList = elasticsearchSelectController.regexpQuery(
      “tEnglishName”,
      "b+(.)“,
      Teacher.class);
      teacherEnglishNameList.forEach(System.err::println);
      System.out.println(”---------------------------------------");
      List<Teacher> teacherNameList =
      elasticsearchSelectController.regexpQuery(
      “tName”,
      “小白+(.)*”,
      Teacher.class);
      teacherNameList.forEach(System.err::println);
      }

  }

  ---

• 8.11 rangeQuery 查询文档(范围查询)

• • rangeQuery(String name).from(Object from,boolean includeLower).to(Object to,boolean includeLower)
                        name: 域名(字段名称)
                        from: 范围查询的from部分, Null 表示无界
                        includeLower：是否包含 默认为true[包含]
                        to: 范围查询的to部分, Null 表示无界
                        includeLower：是否包含 默认为true[包含]

  ---

  rangeQuery 查询文档(范围查询) 测试

  • 支持范围查询的字段类型有:数值、日期、地址的IP范围。

• 8.11.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param name :es里索引的域(字段名)
    • @param from :范围查询值 1 from(Object from, boolean includeLower) includeLower：是否包含 默认为true[包含]

    •              //              如果from==null  那么就是<=to的
      1

    • @param to :范围查询值 2 to(Object to, boolean includeUpper) includeLower：是否包含 默认为true[包含]

    •              //              如果to==null 那么就是 >=from的
      1

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : rangeQuery 范围查询
    • @Author Mhh
    • @Date 2021/12/12 18:13
      */
      @PostMapping(“rangeQuery”)
      public <T> List<T> rangeQuery(String name, Integer from, Integer to, Class<T> classType) {
      return elasticsearchSelectService.rangeQuery(name, from, to, classType);
      }
      }
      

    ---

     

    8.11.2 service层

    import org.elasticsearch.client.indices.AnalyzeResponse;
    

  import org.elasticsearch.index.query.Operator;
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param name :es里索引的域(字段名)
    • @param from :范围查询值 1 from(Object from, boolean includeLower) includeLower：是否包含 默认为true[包含]
    • // 如果from==null 那么就是<=to的
    • @param to :范围查询值 2 to(Object to, boolean includeUpper) includeLower：是否包含 默认为true[包含]
    • // 如果to==null 那么就是 >=from的
    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : rangeQuery 范围查询
    • @Author Mhh
    • @Date 2021/12/12 18:13
      */
      public <T> List<T> rangeQuery(String name, Integer from, Integer to, Class<T> classType);

  }

  ---

   

  8.11.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param name :es里索引的域(字段名)

    • @param from :范围查询值 1 from(Object from, boolean includeLower) includeLower：是否包含 默认为true[包含]

    • // 如果from==null 那么就是<=to的

    • @param to :范围查询值 2 to(Object to, boolean includeUpper) includeLower：是否包含 默认为true[包含]

    • // 如果to==null 那么就是 >=from的

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引

    • @return java.util.List<T>

    • @explain : rangeQuery 范围查询

    • @Author Mhh

    • @Date 2021/12/12 18:13
      */
      public <T> List<T> rangeQuery(String name, Integer from, Integer to, Class<T> classType) {

      //查询条件(词条查询：对应ES query里的rangeQuery)
      RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery(name).from(from).to(to);
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(rangeQueryBuilder);
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());
      }

  }

  ---

   

  rangeQuery 查询文档(范围查询) 测试结果：

  includeLower=true;(是否包含 默认为true[包含])

  • 如果from==null 那么就是<=to的
  • 如果to==null 那么就是 >=from的
  • 如果 from!=null && to!=null 那么就是from>=to的
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param name :es里索引的域(字段名)
    • @param from :范围查询值 1 from(Object from, boolean includeLower) includeLower：是否包含 默认为true[包含]

    •              //              如果from==null  那么就是<=to的
      1

    • @param to :范围查询值 2 to(Object to, boolean includeUpper) includeLower：是否包含 默认为true[包含]

    •              //              如果to==null 那么就是 >=from的
      1

    • @param classType :返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : rangeQuery 范围查询
    • @Author Mhh
    • @Date 2021/12/12 18:13
      */
      @Test
      public void rangeQuery() {
      List<Teacher> lteTeacherList = elasticsearchSelectController.rangeQuery(
      “tAge”, null, 18, Teacher.class);
      lteTeacherList.forEach(System.err::println);
      System.out.println(“-------------------------------------”);
      List<Teacher> gteTeacherList = elasticsearchSelectController.rangeQuery(
      “tAge”, 18, null, Teacher.class);
      gteTeacherList.forEach(System.err::println);
      }

  }

  ---

• 8.12 Sort 查询文档 (排序)

• • addSort(Sort sort): 添加排序
               by(Sort.Direction direction, String… properties)
                        direction : 排序 Sort.Direction.ASC:升序 || Sort.Direction.DESC:降序
                        properties : 域名(可变参数,可传1至多个)

  ---

  Sort 查询文档 (排序) 测试

  • 在排序的过程中，只能使用可排序的属性进行排序(数字、日期)

• 8.12.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /**

    • @param direction : 排序 Sort.Direction.ASC:升序 || Sort.Direction.DESC:降序
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param properties : 域名(可变参数,可传1至多个)
    • @return java.util.List<T>
    • @explain : 给查询 结果排序
    • @Author Mhh
    • @Date 2021/12/12 18:45
      */
      @PostMapping(“sort”)
      public <T> List<T> sort(Sort.Direction direction, Class<T> classType, String… properties) {
      return elasticsearchSelectService.sort(direction, classType, properties);
      }
      }
      

    ---

     

    8.12.2 service层

    import org.elasticsearch.client.indices.AnalyzeResponse;
    

  import org.elasticsearch.index.query.Operator;
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /**

    • @param direction : 排序 Sort.Direction.ASC:升序 || Sort.Direction.DESC:降序
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param properties : 域名(可变参数,可传1至多个)
    • @return java.util.List<T>
    • @explain : 给查询 结果排序
    • @Author Mhh
    • @Date 2021/12/12 18:45
      */
      public <T> List<T> sort(Sort.Direction direction, Class<T> classType, String… properties);

  }

  ---

   

  8.12.3 serviceimpl层

  import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.action.search.SearchResponse;
  import org.elasticsearch.client.RequestOptions;
  import org.elasticsearch.client.RestHighLevelClient;
  import org.elasticsearch.client.indices.AnalyzeRequest;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.*;
  import org.elasticsearch.search.aggregations.Aggregation;
  import org.elasticsearch.search.aggregations.AggregationBuilders;
  import org.elasticsearch.search.aggregations.bucket.terms.Terms;
  import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
  import org.elasticsearch.search.aggregations.metrics.*;
  import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
  import org.elasticsearch.search.suggest.*;
  import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
  import org.elasticsearch.search.suggest.phrase.PhraseSuggestionBuilder;
  import org.elasticsearch.search.suggest.term.TermSuggestionBuilder;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.PageRequest;
  import org.springframework.data.domain.Sort;
  import org.springframework.data.elasticsearch.annotations.Document;
  import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
  import org.springframework.data.elasticsearch.core.SearchHit;
  import org.springframework.data.elasticsearch.core.SearchHits;
  import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
  import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
  import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
  import org.springframework.stereotype.Service;
  

  import java.io.IOException;
  import java.lang.reflect.Field;
  import java.util.*;
  import java.util.stream.Collectors;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @Service
    public class ElasticsearchSelectServiceImp implements ElasticsearchSelectService {

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    /**

    • @param direction : 排序 Sort.Direction.ASC:升序 || Sort.Direction.DESC:降序
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param properties : 域名(可变参数,可传1至多个)
    • @return java.util.List<T>
    • @explain : 给查询 结果排序
    • @Author Mhh
    • @Date 2021/12/12 18:45
      */
      public <T> List<T> sort(Sort.Direction direction, Class<T> classType, String… properties) {
      //查询条件(词条查询：对应ES query里的sort)
      MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
      //创建查询条件构建器SearchSourceBuilder(对应ES外面的大括号)
      NativeSearchQuery nativeSearchQuery = new NativeSearchQuery(matchAllQueryBuilder);
      nativeSearchQuery.addSort(Sort.by(direction, properties));
      //查询,获取查询结果
      SearchHits<T> search = elasticsearchRestTemplate.search(nativeSearchQuery, classType);
      //获取总记录数
      long totalHits = search.getTotalHits();
      //获取值返回
      return search.getSearchHits().stream().map(SearchHit::getContent).collect(Collectors.toList());
      }

  }

  ---

   

  Sort 查询文档 (排序) 测试结果：

  • ES支持多级排序—sort : 将查询结果首先按第一个自定义条件排序，当第一个 sort 值完全相同时，再按照第二个条件进行排序，以此类推。
    
    

  import com.it.mhh.elasticsearch.controller.ElasticsearchSelectController;
  import com.it.mhh.elasticsearch.entity.Student;
  import com.it.mhh.elasticsearch.entity.Teacher;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.data.domain.Sort;
  import org.springframework.test.context.junit4.SpringRunner;
  

  import java.io.IOException;
  import java.util.*;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述:
    */
    @SpringBootTest
    @RunWith(SpringRunner.class)
    public class ElasticsearchSelectControllerTest {

    @Autowired
    private ElasticsearchSelectController elasticsearchSelectController;//es的查询

    /**

    • @param direction : 排序 Sort.Direction.ASC:升序 || Sort.Direction.DESC:降序
    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @param properties : 域名(可变参数,可传1至多个)
    • @return java.util.List<T>
    • @explain : 给查询 结果排序
    • @Author Mhh
    • @Date 2021/12/12 18:45
      */
      @Test
      public void sort() {
      List<Teacher> ascTeacherList = elasticsearchSelectController.sort(
      Sort.Direction.ASC, Teacher.class, “tAge”);
      ascTeacherList.forEach(System.err::println);
      System.out.println(“------------------------------------”);
      List<Teacher> descTeacherList = elasticsearchSelectController.sort(
      Sort.Direction.DESC, Teacher.class, “tAge”);
      descTeacherList.forEach(System.err::println);
      }

  }

  ---

• 8.13 queryStringQuery 查询文档 (多条件查询 一值多域)

• • queryStringQuery(String queryString).fields(Map<String, Float> fields).analyzer(String analyzer).defaultOperator(Operator defaultOperator)
                                 queryString : 要运行的查询字符串
                                 fields : 添加多个域(字段)以及针对特定权重进行查询。
                                 analyzer : 选择分词器(对查询的只进行分词)
                                 defaultOperator : Operator.OR 并集 || Operator.AND 交集

  ---

  queryStringQuery 查询文档 (多条件查询 一值多域) 测试

  • queryString 多条件查询
  • 会对查询条件进行分词。
  • 将分词后的查询条件和词条进行等值匹配
  • 默认取并集（OR）
  • 可以指定多个查询字段
  • query_string：识别query中的连接符（or 、and）

• 8.13.1 Controller层

• import com.it.mhh.elasticsearch.service.ElasticsearchSelectService;
  import org.elasticsearch.client.indices.AnalyzeResponse;
  import org.elasticsearch.index.query.Operator;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.data.domain.Sort;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  

• import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询类
    */
    @RestController
    @RequestMapping(“/elasticSearch/select”)
    public class ElasticsearchSelectController {

    @Autowired
    private ElasticsearchSelectService elasticsearchSelectService;

    /*

    •  多域查询的交并集理解:
      1

    •                  OR:  只要有一个域中包含入参value被分词后的"一个值"时就返回
      1

    •                  AND: 只要有一个域中包含入参value被分词后的"所有值"时返回
      1

    • @param fields : Map<String,Float>类型:key为域名,Float为boost值

    •              boost: 参数被用来提升一个语句的相对权重（ boost 值大于 1 ）或降低相对权重（ boost 值处于 0 到 1 之间），但是这种提升或降低并不是线性的，换句话说，如果一个 boost 值为 2 ，并不能获得两倍的评分 _score 。
      1

    • @param queryString : 要查询的值 (会对查询条件进行分词)
    • @param analyzer : 选择分词器[ik_smart粗粒度,ik_max_word细粒度] 默认:ik_max_word细粒度
    • @param operator : Operator.OR(并集) [默认] 只要分的词有一个和索引字段上对应上则就返回

    •              Operator.AND(交集)   分的词全部满足的数据返回
      1

    • @param classType : 返回的list里的对象并且通过对象里面@Document注解indexName属性获取查询哪个索引
    • @return java.util.List<T>
    • @explain : queryString 多条件查询
    • •会对查询条件进行分词。
    • •然后将分词后的查询条件和词条进行等值匹配
    • •默认取并集（OR）
    • •可以指定多个查询字段
    • •query_string：识别query中的连接符（or 、and）
    • @Author Mhh
    • @Date 2021/12/12 19:45
      */

    @PostMapping(“queryStringQuery”)
    public <T> List<T> queryStringQuery(Map<String, Float> fields, String queryString, String analyzer, Operator operator, Class<T> classType) {
    return elasticsearchSelectService.queryStringQuery(fields, queryString, analyzer, operator, classType);
    }
    }
    

    ---

     

    8.13.2 service层

    import org.elasticsearch.client.indices.AnalyzeResponse;
    

  import org.elasticsearch.index.query.Operator;
  import org.springframework.data.domain.Sort;

  import java.io.IOException;
  import java.util.List;
  import java.util.Map;

  /**

  • @创建人: Mhh

  • @创建时间: 2021/12/10

  • @描述: 查询
    */
    public interface ElasticsearchSelectService {

    /*

    •  多域查询的交并集理解:
      1

    •                  OR:  只要有一个域中包含入参value被分词后的"一个值"时就返回
      1

    •                  AND: 只要有一个域中包含入参value被分词后的"所有值"时返回
      1

    • @param fields : Map<String,Float>类型:key为域名,Float为boost值

    •              boost: 参数被用来提升一个语句的相对权重（ boost 值大于 1 ）或降低相对权重（ boost 值处于 0 到 1 之间），但是这种提升或降低并不是线性的，换句话说，如果一个 boos
      1