springboot集成ElasticSearch7.6实现对索引的操作

开启elasticsearch
开启elasticsearch-head-master

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;
    }
}

编写测试类

package com.example.demo;

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;

@SpringBootTest
class DemoApplicationTests {
    
    

    @Autowired
    private RestHighLevelClient restHighLevelClient;


    //创建索引
    @Test
    void textCreateIndex()throws  Exception {
    
    
        //创建索引请求
        CreateIndexRequest request=new CreateIndexRequest("demo_index");
        //客户端执行请求 IndicesClient，请求后获得响应
        CreateIndexResponse createIndexResponse = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
        //返回ture创建成功
        System.out.println(createIndexResponse.isAcknowledged());
    }

    //获取索引，判断是否存在
    @Test
    void textExistIndex()throws  Exception {
    
    
        GetIndexRequest demo_index = new GetIndexRequest("demo_index");
        boolean exists = restHighLevelClient.indices().exists(demo_index, RequestOptions.DEFAULT);
        //返回ture索引存在
        System.out.println(exists);
    }

    //删除索引
    @Test
    void textDeleteIndex()throws  Exception {
    
    
        DeleteIndexRequest demo_index = new DeleteIndexRequest("demo_index");
        //删除
        AcknowledgedResponse delete = restHighLevelClient.indices().delete(demo_index, RequestOptions.DEFAULT);
        //返回ture删除成功
        System.out.println(delete.isAcknowledged());
    }

}

效果