Spring Boot集成ES_springboot集成es

POM依赖

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.6.2</version>
</dependency>
<properties>
    <!--需要覆盖默认的ES版本配置，与本地引入的ES版本保持一致-->
    <elasticsearch.version>7.6.2</elasticsearch.version>
</properties>
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配置文件

import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;


@Configuration
public class ElasticSearchClientConfig {

    @Bean
    // 硬编码的值可以设置到配置文件，通过@Value读取
    public RestHighLevelClient restHighLevelClient(){
       //不带账号密码
        RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(
                new HttpHost("192.168.0.1", 9200, "http")));

        //带账号密码
        /*HttpHost host=new HttpHost("192.168.0.1", 9200, HttpHost.DEFAULT_SCHEME_NAME);
        RestClientBuilder builder=RestClient.builder(host);
        CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("elastic","mypass"));
        builder.setHttpClientConfigCallback(f -> f.setDefaultCredentialsProvider(credentialsProvider));
        RestHighLevelClient client = new RestHighLevelClient( builder);*/

        System.out.println("es-config-success............");
        return client;
    }
}

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示例代码

import lombok.AllArgsConstructor;
import lombok.Data;

@Data
@AllArgsConstructor
public class User {
    private String name;
    private int age;
}
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import java.io.IOException;
import java.util.ArrayList;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import com.yfapi.apinodb.entity.User;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.CreateIndexResponse;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.test.context.SpringBootTest;

import com.alibaba.fastjson.JSON;

/**
 *  es7.6.x 高级客户端测试 API
 */
@SpringBootTest
public class ElasticsearchJdApplicationTests {
    // 面向对象来操作
    @Autowired
    @Qualifier("restHighLevelClient")
    private RestHighLevelClient client;

    // 测试索引的创建 Request PUT zzzili_index
    @Test
    void testCreateIndex() throws IOException {
        // 1、创建索引请求
        CreateIndexRequest request = new CreateIndexRequest("zzzili_index");
        // 2、客户端执行请求 IndicesClient,请求后获得响应
        CreateIndexResponse createIndexResponse = client.indices().create(request, RequestOptions.DEFAULT);
        System.out.println(createIndexResponse);
    }

    // 测试获取索引,判断其是否存在
    @Test
    void testExistIndex() throws IOException {
        GetIndexRequest request = new GetIndexRequest("zzzili_index2");
        boolean exists = client.indices().exists(request, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

    // 测试删除索引
    @Test
    void testDeleteIndex() throws IOException {
        DeleteIndexRequest request = new DeleteIndexRequest("zzzili_index");
        // 删除
        AcknowledgedResponse delete = client.indices().delete(request, RequestOptions.DEFAULT);
        System.out.println(delete.isAcknowledged());
    }

    // 测试添加文档
    @Test
    void testAddDocument() throws IOException {
        // 创建对象
        User user = new User("zzzili", 3);
        // 创建请求
        IndexRequest request = new IndexRequest("zzzili_index");
        // 规则 put /zzzili_index/_doc/1
        request.id(UUID.randomUUID().toString());
        request.timeout(TimeValue.timeValueSeconds(1));
        request.timeout("1s");
        // 将我们的数据放入请求 json
        request.source(JSON.toJSONString(user), XContentType.JSON);
        // 客户端发送请求 , 获取响应的结果
        IndexResponse indexResponse = client.index(request, RequestOptions.DEFAULT);
        System.out.println(indexResponse.toString()); //
        System.out.println(indexResponse.status()); // 对应我们命令返回的状态CREATED*/
    }

    // 获取文档，判断是否存在 get /index/doc/1
    @Test
    void testIsExists() throws IOException {
        GetRequest getRequest = new GetRequest("zzzili_index", "1");
        // 不获取返回的 _source 的上下文了
        getRequest.fetchSourceContext(new FetchSourceContext(false));
        getRequest.storedFields("_none_");
        boolean exists = client.exists(getRequest, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

    // 获得文档的信息
    @Test
    void testGetDocument() throws IOException {
        GetRequest getRequest = new GetRequest("zzzili_index", "1");
        GetResponse getResponse = client.get(getRequest, RequestOptions.DEFAULT);
        System.out.println(getResponse.getSourceAsString()); // 打印文档的内容
        System.out.println(getResponse); // 返回的全部内容和命令式一样的
    }

    // 更新文档的信息
    @Test
    void testUpdateRequest() throws IOException {
        UpdateRequest updateRequest = new UpdateRequest("zzzili_index", "1");
        updateRequest.timeout("1s");
        User user = new User("zzziliJava", 18);
        updateRequest.doc(JSON.toJSONString(user), XContentType.JSON);
        UpdateResponse updateResponse = client.update(updateRequest, RequestOptions.DEFAULT);
        System.out.println(updateResponse.status());
    }

    // 删除文档记录
    @Test
    void testDeleteRequest() throws IOException {
        DeleteRequest request = new DeleteRequest("zzzili_index", "1");
        request.timeout("1s");
        DeleteResponse deleteResponse = client.delete(request, RequestOptions.DEFAULT);
        System.out.println(deleteResponse.status());
    }

    // 特殊的，真的项目一般都会批量插入数据！
    @Test
    void testBulkRequest() throws IOException {
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("10s");
        ArrayList<User> userList = new ArrayList<>();
        userList.add(new User("zzzili1", 3));
        userList.add(new User("zzzili2", 3));
        userList.add(new User("zzzili3", 3));
        userList.add(new User("zzl1", 3));
        userList.add(new User("zzl1", 3));
        userList.add(new User("zzl1", 3));
        // 批处理请求
        for (int i = 0; i < userList.size(); i++) {
            // 批量更新和批量删除，就在这里修改对应的请求就可以了
            bulkRequest.add(new IndexRequest("zzzili_index").id("" + (i + 1))
                    .source(JSON.toJSONString(userList.get(i)), XContentType.JSON));
        }
        BulkResponse bulkResponse = client.bulk(bulkRequest, RequestOptions.DEFAULT);
        System.out.println(bulkResponse.hasFailures()); // 是否失败，返回 false 代表 成功！
    }

    // 查询
    // SearchRequest 搜索请求
    // SearchSourceBuilder 条件构造
    // HighlightBuilder 构建高亮
    // TermQueryBuilder 精确查询
    // MatchAllQueryBuilder
    // xxx QueryBuilder 对应我们刚才看到的命令！
    @Test
    void testSearch() throws IOException {
        SearchRequest searchRequest = new SearchRequest("zzzili_index");
        // 构建搜索条件
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.highlighter();
        // 查询条件，我们可以使用 QueryBuilders 工具来实现
        // QueryBuilders.termQuery 精确
        // QueryBuilders.matchAllQuery() 匹配所有
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "zzzili1");
        // MatchAllQueryBuilder matchAllQueryBuilder =
        QueryBuilders.matchAllQuery();
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        System.out.println(JSON.toJSONString(searchResponse.getHits()));
        System.out.println("=================================");
        for (SearchHit documentFields : searchResponse.getHits().getHits()) {
            System.out.println(documentFields.getSourceAsMap());
        }
    }
}

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