开启elasticsearch
开启elasticsearch-head-master
对文档的操作参考：springboot集成ElasticSearch7.6实现对索引的操作
项目结构：
导入依赖：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<!-- 自定义es版本依赖-->
<elasticsearch.version>7.6.1</elasticsearch.version>
</properties>
<dependencies>
<!-- fastjson-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>
<!-- elasticsearch-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<!-- web-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 热部署-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- 加载配置类-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<!-- lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- text测试-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
创建客户端实例
package com.example.demo.ElasticsearchClientConfig;
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("127.0.0.1", 9200, "http")));
return client;
}
}
编写实体类
package com.example.demo.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.stereotype.Component;
//get,set
//有参，无参
//注入到spring
@Data
@AllArgsConstructor
@NoArgsConstructor
@Component
public class User {
private String name;
private int age;
}
编写测试类
package com.example.demo;
import com.alibaba.fastjson.JSON;
import com.example.demo.pojo.User;
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.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
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.util.ArrayList;
import java.util.concurrent.TimeUnit;
@SpringBootTest
public class TextDocumetn {
@Autowired
private RestHighLevelClient restHighLevelClient;
//添加文档记录
@Test
void addDoc() throws Exception{
//创建对象
User user = new User("moerduo",18);
//创建请求
IndexRequest request = new IndexRequest("demo_index");
//规则
request.id("1");
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 = restHighLevelClient.index(request, RequestOptions.DEFAULT);
System.out.println(indexResponse.toString());
System.out.println(indexResponse.status()); //返回状态
}
//获取文档是否存在
@Test
void docExists() throws Exception{
//索引名称，id
GetRequest getRequest=new GetRequest("demo_index","1");
boolean exists = restHighLevelClient.exists(getRequest, RequestOptions.DEFAULT);
System.out.println(exists); //存在返回true
}
//获取文档信息。
@Test
void textGetDocument() throws Exception{
//索引名称，id
GetRequest getRequest=new GetRequest("demo_index","1");
GetResponse getResponse = restHighLevelClient.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
}
//更新文档信息。
@Test
void textUpdateDocument() throws Exception {
//索引名称，id
UpdateRequest updateRequest = new UpdateRequest("demo_index", "1");
updateRequest.timeout("1s");
//更新后的数据
User user = new User("abcd", 20);
updateRequest.doc(JSON.toJSONString(user),XContentType.JSON);
UpdateResponse updateResponse = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
System.out.println(updateResponse.status());
}
//删除文档信息。
@Test
void textDeleteDocument() throws Exception{
//索引名称，id
DeleteRequest request = new DeleteRequest("demo_index", "1");
request.timeout("1s");
DeleteResponse deleteResponse = restHighLevelClient.delete(request, RequestOptions.DEFAULT);
System.out.println(deleteResponse.status());
}
//批量插入数据
@Test
void textBulkRequest() throws Exception{
BulkRequest bulkRequest = new BulkRequest();
bulkRequest.timeout("10s");
//插入数据
ArrayList<User> userList = new ArrayList<>();
userList.add(new User("moerduo0",18));
userList.add(new User("moerduo1",18));
userList.add(new User("moerduo2",18));
userList.add(new User("moerduo3",18));
userList.add(new User("moerduo4",18));
userList.add(new User("moerduo5",18));
//批量处理请求
for (int i = 0; i < userList.size(); i++) {
bulkRequest.add(
new IndexRequest("demo_index")
.id(""+(i+1)) //id自增
.source(JSON.toJSONString(userList.get(i)),XContentType.JSON)
);
}
BulkResponse bulkResponse = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
System.out.println(bulkResponse.hasFailures()); //返回false说明添加失败
}
//查询数据
@Test
void textSearch() throws Exception{
//索引名称
SearchRequest searchRequest = new SearchRequest("demo_index");
//构建搜索条件
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
//查询条件，我们可以用QueryBuilders工具实现
//QueryBuilders.termQuery 精确查找
TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "moerduo0");
sourceBuilder.query(termQueryBuilder);
sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
searchRequest.source(sourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
System.out.println(JSON.toJSONString(searchResponse.getHits()));
System.out.println("============================");
for(SearchHit documentFields:searchResponse.getHits()){
System.out.println(documentFields.getSourceAsMap());
}
}
}
效果：
