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springboot + jpa + redis + hibernate validator + 后台抽象_springboot+springdatajpa+hibernate hibernate valid

作者：运维做开发 | 2024-07-12 17:52:06

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springboot+springdatajpa+hibernate hibernate validitor

本文目的：

1.想写一套自己的后台框架

2.激励自己学习的兴趣

那么代码开始

一，pom 文件

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.  
  6.     <groupId>com.dencycheng</groupId>
  7.     <artifactId>admin</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>war</packaging>
  10.  
  11.     <name>admin</name>
  12.     <description>后台管理</description>
  13.  
  14.     <parent>
  15.         <groupId>org.springframework.boot</groupId>
  16.         <artifactId>spring-boot-starter-parent</artifactId>
  17.         <version>2.0.4.RELEASE</version>
  18.         <relativePath/> <!-- lookup parent from repository -->
  19.     </parent>
  20.  
  21.     <properties>
  22.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  23.         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  24.         <java.version>1.8</java.version>
  25.     </properties>
  26.  
  27.     <dependencies>
  28.         <dependency>
  29.             <groupId>org.springframework.boot</groupId>
  30.             <artifactId>spring-boot-starter-data-jpa</artifactId>
  31.         </dependency>
  32.         <dependency>
  33.             <groupId>org.springframework.boot</groupId>
  34.             <artifactId>spring-boot-starter-web</artifactId>
  35.         </dependency>
  36.         <dependency>
  37.             <groupId>mysql</groupId>
  38.             <artifactId>mysql-connector-java</artifactId>
  39.             <scope>runtime</scope>
  40.         </dependency>
  41.         <dependency>
  42.             <groupId>org.springframework.boot</groupId>
  43.             <artifactId>spring-boot-starter-data-redis</artifactId>
  44.         </dependency>
  45.         <!-- 返回Json -->
  46.         <dependency>
  47.             <groupId>net.sf.json-lib</groupId>
  48.             <artifactId>json-lib</artifactId>
  49.             <version>2.4</version>
  50.             <classifier>jdk15</classifier>
  51.         </dependency>
  52.  
  53.         <dependency>
  54.             <groupId>org.springframework.boot</groupId>
  55.             <artifactId>spring-boot-starter-tomcat</artifactId>
  56.             <scope>compile</scope>
  57.         </dependency>
  58.         <dependency>
  59.             <groupId>org.springframework.boot</groupId>
  60.             <artifactId>spring-boot-starter-test</artifactId>
  61.             <scope>test</scope>
  62.         </dependency>
  63.     </dependencies>
  64.  
  65.     <build>
  66.         <plugins>
  67.             <plugin>
  68.                 <groupId>org.springframework.boot</groupId>
  69.                 <artifactId>spring-boot-maven-plugin</artifactId>
  70.             </plugin>
  71.         </plugins>
  72.     </build>
  73.  
  74.  
  75. </project>

二，配置文件 application.yml

  1. #server
  2. server:
  3.    port:8080
  4.    server.tomcat.uri-encoding:UTF-8
  5. spring:
  6.   datasource:
  7.     driver-class-name: com.mysql.jdbc.Driver
  8.     url: jdbc:mysql://localhost:3306/jpatest?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
  9.     username: root
  10.     password: 123456
  11.   jpa:
  12.     hibernate:
  13.       ddl-auto: update
  14.     show-sql: true
  15.     properties:
  16.       hibernate.format_sql: true
  17.   jackson:
  18.     date-format: yyyy-MM-dd HH:mm:ss
  19.     time-zone: UTC
  20.   redis:
  21.     database: 0
  22.     host: 127.0.0.1
  23.     port: 6379
  24.     password:
  25.     timeout: 1000
  26.  
  27.

三，公共dao层

  1. package com.dencycheng.framework.dao;
  2.  
  3. import org.springframework.data.jpa.repository.JpaRepository;
  4. import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
  5. import org.springframework.data.repository.NoRepositoryBean;
  6.  
  7. /**
  8.  * @author  DencyCheng
  9.  * @param <T>
  10.  */
  11. @NoRepositoryBean
  12. public interface BaseDao<T> extends JpaRepository<T, Integer>, JpaSpecificationExecutor<T> {
  13.      T findOneById(Integer id);
  14. }

四，公共service层

  1. package com.dencycheng.framework.service;
  2.  
  3. import com.dencycheng.framework.common.ResponseResult;
  4. import com.dencycheng.framework.dao.BaseDao;
  5. import org.springframework.beans.factory.annotation.Autowired;
  6. import org.springframework.cache.annotation.Cacheable;
  7. import org.springframework.cache.annotation.EnableCaching;
  8. import org.springframework.data.domain.Page;
  9. import org.springframework.data.domain.PageRequest;
  10. import org.springframework.data.domain.Pageable;
  11. import org.springframework.data.domain.Sort;
  12. import org.springframework.data.jpa.domain.Specification;
  13. import org.springframework.util.StringUtils;
  14.  
  15. import java.util.List;
  16. import javax.persistence.criteria.*;
  17.  
  18. /**
  19.  * Created by Dency Cheng on 2018/8/7/007.
  20.  */
  21. @EnableCaching
  22. public class BaseService<T> {
  23.  
  24.     @Autowired
  25.     BaseDao<T> baseDao;
  26.  
  27.     
  28.     public T save(T t) {
  29.         return baseDao.save(t);
  30.     }
  31.  
  32.     public void deleteById(Integer id) {
  33.         baseDao.deleteById(id);
  34.     }
  35.  
  36.     public void batchDelete(List deleteList) {
  37.         baseDao.deleteAll(deleteList);
  38.     }
  39.  
  40.     public T findOneById(Integer id) {
  41.         return baseDao.findOneById(id);
  42.     }
  43.  
  44.     @Cacheable(value = "searchList",key = "#root.targetClass.simpleName+':'+#root.methodName+':'+#root.args")
  45.     public ResponseResult searchList(Integer num, Integer size, String name) {
  46.  
  47.         int newNum = StringUtils.isEmpty(num) ? 0 : num;
  48.         int newSize = StringUtils.isEmpty(size) ? 10 : size;
  49.         Sort sort = new Sort(Sort.Direction.DESC, "createDt");
  50.         Pageable pageable = new PageRequest(newNum, newSize, sort);
  51.         Page<T> pages = null;
  52.         if (StringUtils.isEmpty(name)) {
  53.             pages = baseDao.findAll(pageable);
  54.         } else {
  55.             Specification<T> specifications = new Specification<T>() {
  56.                 @Override
  57.                 public Predicate toPredicate(Root root,
  58.                                              CriteriaQuery query,
  59.                                              CriteriaBuilder cb) {
  60.                     Path path = root.get("name");
  61.                     return cb.like(path, name);
  62.                 }
  63.             };
  64.         }
  65.  
  66.         if (pages.getContent().size() == 0) {
  67.             return ResponseResult.noResult();
  68.         } else {
  69.             return ResponseResult.isScuess(pages);
  70.         }
  71.  
  72.  
  73.     }
  74.   
  75. }

五，返回类 

ResponseResult 

  1. package com.dencycheng.framework.common;
  2.  
  3. import com.fasterxml.jackson.annotation.JsonInclude;
  4.  
  5. import java.io.Serializable;
  6.  
  7. /**
  8.  * 统一返回
  9.  * @author DencyCheng
  10.  */
  11. @JsonInclude(JsonInclude.Include.NON_NULL)
  12. public class ResponseResult implements Serializable{
  13.     private Integer code;
  14.     private String state;
  15.     private Object data;
  16.  
  17.     /**
  18.      * 正常返回结果
  19.      * @param object
  20.      * @return
  21.      */
  22.     public static ResponseResult isScuess(Object object){
  23.         return new ResponseResult(Code.SUCCESS.getCode(), State.SCUUESS.name(),object);
  24.     }
  25.  
  26.     /**
  27.      * 正常返回结果
  28.      * @return
  29.      */
  30.     public static ResponseResult isScuess(){
  31.         return new ResponseResult(Code.SUCCESS.getCode(), State.SCUUESS.name(),"操作成功");
  32.     }
  33.  
  34.     /**
  35.      * 查询无结果
  36.      * @return
  37.      */
  38.     public static ResponseResult noResult(){
  39.         return new ResponseResult(Code.NORESULT.getCode(), State.SCUUESS.name(),"无数据");
  40.     }
  41.  
  42.     /**
  43.      * 返回错误信息
  44.      * @param object
  45.      * @return
  46.      */
  47.     public static ResponseResult isError(Object object){
  48.         return new ResponseResult(Code.ERROR.getCode(), State.ERROR.name(),object);
  49.     }
  50.  
  51.     /**
  52.      * 参数错误
  53.      * @param object
  54.      * @return
  55.      */
  56.     public static ResponseResult isParmError(Object object){
  57.         return new ResponseResult(Code.PARMERROR.getCode(), State.ERROR.name(),object);
  58.     }
  59.  
  60.     /**
  61.      * 参数错误
  62.      * @return
  63.      */
  64.     public static ResponseResult isParmError(){
  65.         return new ResponseResult(Code.PARMERROR.getCode(), State.ERROR.name(),"缺少参数");
  66.     }
  67.  
  68.  
  69.     public ResponseResult(Integer code, String state, Object data) {
  70.         this.code = code;
  71.         this.state = state;
  72.         this.data = data;
  73.     }
  74.  
  75.     public ResponseResult(Integer code, String state) {
  76.         this.code = code;
  77.         this.state = state;
  78.     }
  79.  
  80.     public Integer getCode() {
  81.         return code;
  82.     }
  83.  
  84.     public void setCode(Integer code) {
  85.         this.code = code;
  86.     }
  87.  
  88.     public String getState() {
  89.         return state;
  90.     }
  91.  
  92.     public void setState(String state) {
  93.         this.state = state;
  94.     }
  95.  
  96.     public Object getData() {
  97.         return data;
  98.     }
  99.  
  100.     public void setData(Object data) {
  101.         this.data = data;
  102.     }
  103. }
Code
  1. package com.dencycheng.framework.common;
  2.  
  3. /**
  4.  * 返回结果CODE
  5.  */
  6. public enum Code {
  7.     SUCCESS("成功",200),
  8.     NORESULT("没有检索到数据",201),
  9.     PARMERROR("参数错误",202),
  10.     ERROR("失败",202),
  11.     NOPERMISSION ("无权限访问",40001);
  12.  
  13.     private String desc;
  14.     private int code;
  15.  
  16.     public String getDesc() {
  17.         return desc;
  18.     }
  19.  
  20.     public void setDesc(String desc) {
  21.         this.desc = desc;
  22.     }
  23.  
  24.     public int getCode() {
  25.         return code;
  26.     }
  27.  
  28.     public void setCode(int code) {
  29.         this.code = code;
  30.     }
  31.  
  32.     Code(String desc, int code) {
  33.         this.desc = desc;
  34.         this.code = code;
  35.     }
  36. }

State

  1. package com.dencycheng.framework.common;
  2.  
  3. /**
  4.  * 请求状态
  5.  */
  6. public enum State {
  7.     SCUUESS,
  8.     ERROR;
  9. }

六，user类

  1. package com.dencycheng.admin.model;
  2.  
  3.  
  4. import javax.persistence.Entity;
  5. import javax.persistence.GeneratedValue;
  6. import javax.persistence.Id;
  7. import javax.persistence.Table;
  8. import javax.validation.constraints.Max;
  9. import javax.validation.constraints.Min;
  10. import javax.validation.constraints.NotNull;
  11. import javax.validation.constraints.Size;
  12. import java.io.Serializable;
  13. import java.util.Date;
  14.  
  15. /**
  16.  * 用户实体类
  17.  * @author DencyCheng
  18.  */
  19. @Table(name = "t_user")
  20. @Entity
  21. public class User  implements Serializable {
  22.  
  23.     @Id
  24.     @GeneratedValue
  25.     private Integer id;
  26.  
  27.     @NotNull(message = "{CMM_E0008}年龄")
  28.     @Max(value = 100, message = "年龄{CMM_E0017}100")
  29.     @Min(value = 0, message = "{CMM_E0016}0")
  30.     private Integer age;
  31.  
  32.     @NotNull(message = "{CMM_E0008}姓名")
  33.     @Size(max = 9, message = "姓名{CMM_E0012}")
  34.     private String name;
  35.  
  36.     private Date createDt;
  37.  
  38.     public User() {
  39.     }
  40.  
  41.     public Integer getId() {
  42.         return id;
  43.     }
  44.  
  45.     public void setId(Integer id) {
  46.         this.id = id;
  47.     }
  48.  
  49.     public Integer getAge() {
  50.         return age;
  51.     }
  52.  
  53.     public void setAge(Integer age) {
  54.         this.age = age;
  55.     }
  56.  
  57.     public String getName() {
  58.         return name;
  59.     }
  60.  
  61.     public void setName(String name) {
  62.         this.name = name;
  63.     }
  64.  
  65.     public Date getCreateDt() {
  66.         return createDt;
  67.     }
  68.  
  69.     public void setCreateDt(Date createDt) {
  70.         this.createDt = createDt;
  71.     }
  72. }

七，userDao

  1. package com.dencycheng.admin.dao;
  2.  
  3. import com.dencycheng.admin.model.User;
  4. import com.dencycheng.framework.dao.BaseDao;
  5.  
  6. public interface UserDao extends BaseDao<User> {
  7.  
  8. }

八，userService

  1. package com.dencycheng.admin.service;
  2.  
  3.  
  4. import com.dencycheng.admin.dao.UserDao;
  5. import com.dencycheng.admin.model.User;
  6. import com.dencycheng.framework.service.BaseService;
  7. import org.springframework.beans.factory.annotation.Autowired;
  8. import org.springframework.stereotype.Service;
  9.  
  10.  
  11. /**
  12.  * @author DencyCheng
  13.  */
  14. @Service
  15. public class UserService extends BaseService<User> {
  16.     @Autowired
  17.     UserDao userDao;
  18. }

九，userController

  1. package com.dencycheng.admin.controller;
  2.  
  3. import com.dencycheng.admin.model.User;
  4. import com.dencycheng.admin.service.UserService;
  5. import com.dencycheng.framework.common.ResponseResult;
  6. import org.springframework.beans.factory.annotation.Autowired;
  7. import org.springframework.validation.BindingResult;
  8. import org.springframework.web.bind.annotation.*;
  9.  
  10. import javax.validation.Valid;
  11. import java.util.HashMap;
  12. import java.util.Map;
  13.  
  14. /**
  15.  * 用户控制器
  16.  */
  17. @RestController
  18. @RequestMapping("/user")
  19. public class UserController {
  20.  
  21.     @Autowired
  22.     UserService userService;
  23.  
  24.     /**
  25.      * 搜索列表
  26.      * @param num
  27.      * @param size
  28.      * @param name
  29.      * @return
  30.      */
  31.     @PostMapping("list/{num}/{size}")
  32.     private ResponseResult searchList(@PathVariable Integer num,@PathVariable Integer size, String name){
  33.         return userService.searchList(num,size,name);
  34.     }
  35.  
  36.  
  37.     /**
  38.      * 查询单个用户
  39.      *
  40.      * @param id
  41.      * @return
  42.      */
  43.     @PostMapping("/findOneById/{id}")
  44.     private ResponseResult findOneById(@PathVariable Integer id) {
  45.         if (id == null) {
  46.             return ResponseResult.isParmError();
  47.         }
  48.         User user = userService.findOneById(id);
  49.         if (user == null) {
  50.             return ResponseResult.noResult();
  51.         } else {
  52.             return ResponseResult.isScuess(user);
  53.         }
  54.     }
  55.  
  56.     /**
  57.      * 保存，更新
  58.      *
  59.      * @return
  60.      */
  61.     @PostMapping("/save")
  62.     private ResponseResult save(@Valid User user, BindingResult result) {
  63.         Map<String, String> errorsMap = new HashMap<String, String>();
  64.         // 普通校验
  65.         if (result.hasErrors()) {
  66.             result.getFieldErrors().forEach(p -> {
  67.                 errorsMap.put(p.getField(), p.getDefaultMessage());
  68.             });
  69.         }
  70.  
  71.         if (!errorsMap.isEmpty()) {
  72.             return ResponseResult.isParmError(errorsMap);
  73.         }
  74.  
  75.         //业务校验
  76.         
  77.         return ResponseResult.isScuess(userService.save(user));
  78.     }
  79.  
  80.     /**
  81.      * 删除
  82.      *
  83.      * @return
  84.      */
  85.     @PostMapping("/delete/{id}")
  86.     private ResponseResult delete(@PathVariable Integer id) {
  87.  
  88.         if (id == null) {
  89.             return ResponseResult.isParmError();
  90.         }
  91.         userService.deleteById(id);
  92.         return ResponseResult.isScuess();
  93.     }
  94.  
  95.  
  96. }

注：项目还在改善中，现在不是很完美

项目码云地址:https://gitee.com/DencyCheng/admin-api

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