Foreword: ES version iteration is too fast, the difference between es5, es6, and es7 is still relatively large, refer to: https://blog.csdn.net/chenghuanhuaning/article/details/105235006
Not long-winded here, just go to the example. By the way, pay for the demo I hand-knocked:
https://github.com/javaSunson/es7.6demo.git
1.pom-dependency
<!-- es core jar package --> <dependency> <groupId>org.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-elasticsearch</artifactId> </dependency> <!-- Note the version--> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-rest-high-level-client</artifactId> <version>7.6.1</version> </dependency><!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.6</version> </dependency>
2.pom-properties (the default Springboot2.x or es6 version, you need to manually specify the version. The high version is unified here)
<properties> <java.version>1.8</java.version> <!-- Note that the version is consistent with your es--> <elasticsearch.version>7.6.1</elasticsearch.version> </properties>
3.Config
package com.hmwl.myes.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;
/**
* @author martin
* @version 1.0
* @name: ElasticConfig
* @date: 2021/2/1 9:08
* @description 注意将配置放置到配置中心配置
**/
@Configuration
public class ElasticConfig {
@Bean
public RestHighLevelClient restHighLevelClient(){
RestHighLevelClient client = new RestHighLevelClient(
// 构建者支持 单机 和 集群配置。
RestClient.builder(
new HttpHost("localhost", 19201, "http")));
return client;
}
}
Example:
package com.hmwl.myes;
import com.google.gson.Gson;
import entity.User;
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.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.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.io.IOException;
import java.net.UnknownServiceException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@SpringBootTest
class MyesApplicationTests {
@Autowired
private RestHighLevelClient restHighLevelClient;
@Test
void contextLoads() throws IOException {
CreateIndexRequest createIndexRequest = new CreateIndexRequest("user2");
CreateIndexResponse indexResponse = restHighLevelClient.indices().create(createIndexRequest, RequestOptions.DEFAULT);
System.out.println(indexResponse.toString());
}
/**
* 测试索引是否存在
*/
@Test
void testExistIndex() throws IOException {
GetIndexRequest request = new GetIndexRequest("user2");
boolean exist = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
System.out.println("索引是否存在："+exist);
}
/**
* 测试indexAPi
*/
@Test
public void testIndexApi(){
Map<String, Object> param = new HashMap<>();
param.put("name","martin");
param.put("code","11111111");
param.put("job","programer");
}
/**
* 删除index
*/
@Test
public void deleteIndex() throws IOException {
DeleteIndexRequest deleteIndexRequest = new DeleteIndexRequest("user2");
AcknowledgedResponse delete = restHighLevelClient.indices().delete(deleteIndexRequest,RequestOptions.DEFAULT);
System.out.println(delete.isAcknowledged());
}
/********************* 文档操作 ***************************/
@Test
public void createNewDocuments() throws IOException {
User user = new User("1111","martin","25");
IndexRequest indexRequest = new IndexRequest("user1");
indexRequest.id("1");
indexRequest.timeout("1s");
Gson gson = new Gson();
indexRequest.source(gson.toJson(user),XContentType.JSON);
IndexResponse index = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
System.out.println("创建文档结果:"+index.status());
}
/**
* 判断文档是否存在
*/
@Test
public void testExistDocument() throws IOException {
GetRequest request = new GetRequest("user1", "2");
boolean exists = restHighLevelClient.exists(request, RequestOptions.DEFAULT);
System.out.println("文档是否存在:"+exists);
}
/**
* 获取文档
*/
@Test
void testGetDocument() throws IOException {
GetRequest request = new GetRequest("user1","1");
GetResponse doc = restHighLevelClient.get(request, RequestOptions.DEFAULT);
System.out.println(doc.getSourceAsString());
}
/***
* 修改文档
*/
@Test
public void updateDocument() throws IOException {
User user = new User();
user.setAge("18");
UpdateRequest request = new UpdateRequest("user1","1");
request.timeout(TimeValue.MINUS_ONE);
Gson gson = new Gson();
request.doc(gson.toJson(user),XContentType.JSON);
UpdateResponse result = restHighLevelClient.update(request, RequestOptions.DEFAULT);
System.out.println(result);
}
/**
* 测试删除文档
*/
@Test
void testDeleteDocument() throws IOException {
DeleteRequest request = new DeleteRequest("user1","1");
request.timeout("1s");
DeleteResponse result = restHighLevelClient.delete(request, RequestOptions.DEFAULT);
System.out.println(result);
}
/**
* 批量插入文档
*/
@Test
public void testBatchAddDocument() throws IOException {
List<User> userList = new ArrayList<>();
userList.add(new User("222","张三","11"));
userList.add(new User("223","张四","11"));
userList.add(new User("224","张五","11"));
userList.add(new User("225","张刘","11"));
userList.add(new User("226","张七","11"));
userList.add(new User("227","张八","11"));
Gson gson = new Gson();
BulkRequest request = new BulkRequest();
request.timeout("1s");
for(int i =0;i<userList.size();i++){
request.add(new IndexRequest("user1").
id(""+(i+1)).
source(gson.toJson(userList.get(i)),XContentType.JSON));
BulkResponse result = restHighLevelClient.bulk(request,RequestOptions.DEFAULT);
System.out.println(result.status());
}
}
/**
* 查询文档
*/
@Test
public void searchDocument() throws IOException {
SearchRequest request = new SearchRequest("user1");
// builder condition 构建查询条件
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
// 高亮
sourceBuilder.highlighter();
TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "张四");
sourceBuilder.query(termQueryBuilder);
sourceBuilder.timeout(new TimeValue(6000));
request.source(sourceBuilder);
SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
for (SearchHit hit:
response.getHits().getHits()) {
System.out.println(hit.getSourceAsMap());
}
}
}
Thanks to Mad God Java
Reference website: https://blog.csdn.net/mgdj25/article/details/105740191 , https://blog.csdn.net/lisen01070107/article/details/108288037
Reference video: https://www.bilibili.com/video/BV17a4y1x7zq