34-SpringBoot 整合Elasticsearch-Rest-Client

在此之前,请先安装ES, 详情步骤请看博客:https://blog.youkuaiyun.com/qq_41865229/article/details/126070725

ES官方文档:https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-high.html

1.导入依赖

在pom.xml文件中添加以下依赖

        <!-- 导入es的rest-high-level-client-->
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.4.2</version>
        </dependency>

2.编写配置类

package com.atguigu.gulimall.search.config;

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


/**
 * 1、导入依赖
 * 2、编写配置，给容器中注入一个RestHighLevelClient
 * 3、参照API https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/java-rest-high.html
 */
@Configuration
public class GulimallElasticSearchConfig {

    public static final RequestOptions COMMON_OPTIONS;
    static {
        RequestOptions.Builder builder = RequestOptions.DEFAULT.toBuilder();
        COMMON_OPTIONS = builder.build();
    }

    @Bean
    public RestHighLevelClient esRestClient(){

        RestClientBuilder builder = null;
        builder = RestClient.builder(HttpHost.create("http://192.168.56.103:9200"));
        RestHighLevelClient client = new RestHighLevelClient(builder);
        return client;
    }


}

3.测试类

package com.atguigu.gulimall.search;

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import com.alibaba.fastjson.JSON;
import com.atguigu.gulimall.search.config.GulimallElasticSearchConfig;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.springframework.beans.factory.annotation.Autowired;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

@RunWith(SpringRunner.class)
@SpringBootTest
public class GulimallSearchApplicationTests {
    @Autowired
    private RestHighLevelClient client;

    @Test
    public void test1(){
        System.out.println("ok");
    }

    /**
     * 测试存储数据到es
     * 更新也可以
     */
    @Test
    public void indexData() throws IOException {
        IndexRequest indexRequest = new IndexRequest("users");
        indexRequest.id("1");//数据的id
        Map<String, String> user = new HashMap<>();
        user.put("name", "andy");
        user.put("gender",  "man");
        user.put("age","45");
        String jsonString = JSON.toJSONString(user);
        indexRequest.source(jsonString, XContentType.JSON);//要保存的内容

        //执行操作
        IndexResponse index = client.index(indexRequest, GulimallElasticSearchConfig.COMMON_OPTIONS);
        //提取有用的响应数据
        System.out.println(index);
    }

    /**
     * 测试检索数据
     */
    @Test
    public void searchData() throws IOException {
        //1、创建检索请求
        SearchRequest searchRequest = new SearchRequest();
        //指定索引
        searchRequest.indices("users");
        //2、执行检索；
        SearchResponse searchResponse = client.search(searchRequest, GulimallElasticSearchConfig.COMMON_OPTIONS);

        //3、分析结果 searchResponse
        System.out.println(searchResponse.toString());
    }

}

测试成功