springboot集成elasticsearch7的图文方法

1.创建项目

修改依赖版本

2.创建配置文件

package com.huanmingjie.elasticsearch.config;

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
   public RestHighLevelClient restHighLevelClient() {
       RestHighLevelClient client = new RestHighLevelClient(
               RestClient.builder(
                       new HttpHost("localhost", 9200, "http")));
       return client;
   }

}

3.测试

3.1索引操作

1.创建索引

2.判断索引是否存在

3.删除索引

索引操作代码

package com.huanmingjie.elasticsearch;

import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
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.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;

@SpringBootTest
class ElasticsearchApplicationTests {

@Autowired
   private RestHighLevelClient restHighLevelClient;

//创建索引 PUT zoomy_index
   @Test
   void createIndex() throws IOException {
       CreateIndexRequest request = new CreateIndexRequest("zoomy_index");
       restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
   }

//判断索引是否存在
   @Test
   void getIndex() throws IOException {
       GetIndexRequest request = new GetIndexRequest("zoomy_index");
       boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
       System.out.println(exists);
   }

//删除索引
   @Test
   void deleteIndex() throws IOException {
       DeleteIndexRequest request = new DeleteIndexRequest("zoomy_index");
       AcknowledgedResponse delete = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
       System.out.println(delete.isAcknowledged());
   }
}

3.2文档操作

创建实体类

package com.huanmingjie.elasticsearch.pojo;

import org.springframework.stereotype.Component;

@Component
public class User {
   private String name;
   private int age;

public User() {
   }

public User(String name, int age) {
       this.name = name;
       this.age = age;
   }

public String getName() {
       return name;
   }

public void setName(String name) {
       this.name = name;
   }

public int getAge() {
       return age;
   }

public void setAge(int age) {
       this.age = age;
   }
}

1.添加文档

2.获取文档，判断是否存在

3.获取文档信息

4.更新文档

5.删除文档

3.3实战操作

批量创建数据

查询

package com.huanmingjie.elasticsearch;

import com.alibaba.fastjson.JSON;
import com.huanmingjie.elasticsearch.pojo.User;
import com.huanmingjie.elasticsearch.utils.ESConstant;
import net.minidev.json.JSONObject;
import org.apache.lucene.util.QueryBuilder;
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.SearchRequestBuilder;
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.Request;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.MatchAllQueryBuilder;
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.boot.test.context.SpringBootTest;

import javax.naming.directory.SearchResult;
import java.io.IOException;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;

@SpringBootTest
class ElasticsearchApplicationTests {

@Autowired
   private RestHighLevelClient restHighLevelClient;

//创建索引 PUT zoomy_index
   @Test
   void createIndex() throws IOException {
       CreateIndexRequest request = new CreateIndexRequest("zoomy_index");
       restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
   }

//判断索引是否存在
   @Test
   void getIndex() throws IOException {
       GetIndexRequest request = new GetIndexRequest("zoomy_index");
       boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
       System.out.println(exists);
   }

//删除索引
   @Test
   void deleteIndex() throws IOException {
       DeleteIndexRequest request = new DeleteIndexRequest("zoomy_index");
       AcknowledgedResponse delete = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
       System.out.println(delete.isAcknowledged());
   }

//添加文档 PUT zoomy_index/_doc/1
   @Test
   void addDocument() throws IOException {
       User user = new User("zoomy", 21);
       IndexRequest request = new IndexRequest("zoomy_index");
       request.id("1");
       request.timeout(TimeValue.timeValueSeconds(1));
       request.source(JSON.toJSONString(user), XContentType.JSON);
       //客户端发送请求,获取响应结果
       IndexResponse indexResponse = restHighLevelClient.index(request, RequestOptions.DEFAULT);
       System.out.println(indexResponse.toString());
       //命令返回的状态
       System.out.println(indexResponse.status());
   }

//获取文档，判断是否存在
   @Test
   void exitDocument() throws IOException {
       GetRequest request = new GetRequest("zoomy_index", "1");
       //不获取返回的_source的上下文，效率更高
       request.fetchSourceContext(new FetchSourceContext(false));
       request.storedFields("_none_");
       boolean exists = restHighLevelClient.exists(request, RequestOptions.DEFAULT);
       System.out.println(exists);
   }

//获取文档信息
   @Test
   void getDocument() throws IOException {
       GetRequest request = new GetRequest("zoomy_index", "1");
       GetResponse getResponse = restHighLevelClient.get(request, RequestOptions.DEFAULT);
       //打印文档内容
       System.out.println(getResponse.getSourceAsString());
       //返回全部内容
       System.out.println(getResponse);

}

//更新文档 POST zoomy_index/_doc/1/_update
   @Test
   void updateDocument() throws IOException {
       UpdateRequest request = new UpdateRequest("zoomy_index", "1");
       request.timeout(TimeValue.timeValueSeconds(1));
       User user = new User("zoomy", 22);
       request.doc(JSON.toJSONString(user), XContentType.JSON);
       UpdateResponse updateResponse = restHighLevelClient.update(request, RequestOptions.DEFAULT);
       System.out.println(updateResponse.status());
   }

//删除文档
   @Test
   void deleteDocument() throws IOException {
       DeleteRequest request = new DeleteRequest("zoomy_index", "1");

DeleteResponse deleteResponse = restHighLevelClient.delete(request, RequestOptions.DEFAULT);
       System.out.println(deleteResponse.status());
   }

//批量处理数据
   @Test
   void bulkRequest() throws IOException {
       BulkRequest bulkRequest = new BulkRequest();
       bulkRequest.timeout(TimeValue.timeValueSeconds(10));

ArrayList<User> userList = new ArrayList<>();
       userList.add(new User("zoomy1", 21));
       userList.add(new User("zoomy2", 22));
       userList.add(new User("zoomy3", 23));

for (int i = 0; i < userList.size(); i++) {
           bulkRequest.add(
                   new IndexRequest("zoomy_index")
                           .id("" + (i + 1))
                           .source(JSON.toJSONString(userList.get(i)), XContentType.JSON));
       }
       BulkResponse bulkItemResponses = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
       System.out.println(bulkItemResponses.hasFailures());
   }

//批量处理数据
   @Test
   void searchRequest() throws IOException {
       SearchRequest searchRequest = new SearchRequest(ESConstant.ZOOMY_INDEX);
       //构建搜索条件
       SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

//查询条件QueryBuilders工具  termQuery 精确查询 matchAllQuery匹配所有
       TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "zoomy1");
//        MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
       searchSourceBuilder.query(termQueryBuilder);
       //from size有默认参数
//        searchSourceBuilder.from();
//        searchSourceBuilder.size();
       searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
       searchRequest.source(searchSourceBuilder);
       SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
       System.out.println(JSON.toJSONString(searchResponse.getHits()));
       for (SearchHit hit : searchResponse.getHits().getHits()) {
           System.out.println(hit.getSourceAsMap());
       }
   }

}

来源：https://blog.csdn.net/weixin_42691149/article/details/117094305