方法

通过http 9200访问
使用ES-Rest-Clients

单独创建模块

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添加maven

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

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编写配置文件

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package com.jhj.gulimall.search.config;

import org.apache.http.HttpHost;
import org.elasticsearch.client.HttpAsyncResponseConsumerFactory;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @Description GulimallElasticSearchConfig
 * @Author jhj
 * @Date 2022/6/1310:50
 **/
@Configuration
public class GulimallElasticSearchConfig {
    
    @Value("${es.ip}") //在yml中配置
    private String ip;
    @Value("${es.port}") //在yml中配置
    private Integer port;

    public static final RequestOptions COMMON_OPTIONS;

    static {
    
        RequestOptions.Builder builder = RequestOptions.DEFAULT.toBuilder();
//        builder.addHeader("Authorization", "Bearer" + TOKEN);
//        builder.setHttpAsyncResponseConsumerFactory(
//                new HttpAsyncResponseConsumerFactory
//                        .HeapBufferedResponseConsumerFactory(30 * 1024 * 1024 * 1024));
        COMMON_OPTIONS = builder.build();
    }

    @Bean
    public RestHighLevelClient esRestClient() {
    
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost(this.ip, this.port, "http"))
        );
        return client;
    }
}

使用

详细可以参考官方文档

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package com.jhj.gulimall.search;

import com.alibaba.fastjson.JSON;
import com.jhj.gulimall.search.config.GulimallElasticSearchConfig;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;
import java.io.IOException;

@RunWith(SpringRunner.class)
@SpringBootTest
public class GulimallSearchApplicationTests {
    

    class User{
    
        private String username;
        private String gender;
        private Integer age;

        public void setUsername(String username) {
    
            this.username = username;
        }

        public void setGender(String gender) {
    
            this.gender = gender;
        }

        public void setAge(Integer age) {
    
            this.age = age;
        }
    }
    @Resource
    private RestHighLevelClient restHighLevelClient;
    @Test
    /**
     * 保存 /更新
     */
    public void saveTest() throws IOException {
    
        IndexRequest users = new IndexRequest("users");
        //不设置会自动生成
        users.id("1");
        //1. 键值对
//        users.source("userName","zhangsan","age",18);
        //2. 对象 json转 推荐使用
        User user = new User();
        String s = JSON.toJSONString(user);
        user.setUsername("靳豪杰");
        user.setAge(22);
        user.setGender("男");
        users.source(s, XContentType.JSON);
//执行操作
        IndexResponse index = restHighLevelClient.index(users, GulimallElasticSearchConfig.COMMON_OPTIONS);
        System.out.println(index);
    }

    @Test
    /**
     * 搜索
     */
    public void searchTest() throws IOException {
    
        //创建请求
        SearchRequest searchRequest = new SearchRequest();
        //指定索引 库
        searchRequest.indices("users");
        //指定DSL 检索条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchRequest.source(searchSourceBuilder);
        //执行
        restHighLevelClient.search(searchRequest,GulimallElasticSearchConfig.COMMON_OPTIONS);
    }

}

作者声明

1
如有问题，欢迎指正！