ES在项目中的测试

1、application.yml

server:
  port: ${port:40100}
spring:
  application:
    name: xc-search-service
xuecheng:
  elasticsearch:
    hostlist: ${eshostlist:127.0.0.1:9200} #多个结点中间用逗号分隔

2、ElasticSearchConfi

package com.xuecheng.search.config;

import org.apache.http.HttpHost;
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;

/**
 * @author Administrator
 * @version 1.0
 **/
@Configuration
public class ElasticsearchConfig {

    @Value("${xuecheng.elasticsearch.hostlist}")
    private String hostlist;

    @Bean
    public RestHighLevelClient restHighLevelClient(){
        //解析hostlist配置信息
        String[] split = hostlist.split(",");
        //创建HttpHost数组，其中存放es主机和端口的配置信息
        HttpHost[] httpHostArray = new HttpHost[split.length];
        for(int i=0;i<split.length;i++){
            String item = split[i];
            httpHostArray[i] = new HttpHost(item.split(":")[0], Integer.parseInt(item.split(":")[1]), "http");
        }
        //创建RestHighLevelClient客户端
        return new RestHighLevelClient(RestClient.builder(httpHostArray));
    }

    //项目主要使用RestHighLevelClient，对于低级的客户端暂时不用
    @Bean
    public RestClient restClient(){
        //解析hostlist配置信息
        String[] split = hostlist.split(",");
        //创建HttpHost数组，其中存放es主机和端口的配置信息
        HttpHost[] httpHostArray = new HttpHost[split.length];
        for(int i=0;i<split.length;i++){
            String item = split[i];
            httpHostArray[i] = new HttpHost(item.split(":")[0], Integer.parseInt(item.split(":")[1]), "http");
        }
        return RestClient.builder(httpHostArray).build();
    }

}

3、test

package com.xuecheng.search;

import org.elasticsearch.action.DocWriteResponse;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexResponse;
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.client.IndicesClient;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentType;
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 java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author newcityman
 * @date 2020/2/22 - 13:09
 */
@SpringBootTest
@RunWith(SpringRunner.class)
public class TestIndex {
    @Autowired
    RestClient restClient;
    @Autowired
    RestHighLevelClient restHighLevelClient;

    //删除索引库
    @Test
    public void testDeleteIndex() throws IOException {
        //删除索引对象
        DeleteIndexRequest deleteIndexRequest = new DeleteIndexRequest("xc_course");
        //操作索引的客户端
        IndicesClient indices = restHighLevelClient.indices();
        //执行删除
        DeleteIndexResponse delete = indices.delete(deleteIndexRequest);
        //得到响应
        boolean acknowledged = delete.isAcknowledged();
        System.out.println(acknowledged);
    }

    //创建索引库
    @Test
    public void testCreateIndex() throws IOException {
        //创建索引对象
        CreateIndexRequest createIndexRequest = new CreateIndexRequest("xc_course");
        //设置参数
        createIndexRequest.settings(Settings.builder().put("number_of_shards","1").put("number_of_replicas","0"));
        //指定映射
        createIndexRequest.mapping("doc","{\n" +
                "\t\"properties\": {\n" +
                "\t\t\"studymodel\": {\n" +
                "\t\t\t\"type\": \"keyword\"\n" +
                "\t\t},\n" +
                "\t\t\"name\":{\n" +
                "\t\t\t\"type\": \"keyword\"\n" +
                "\t\t},\n" +
                "\t\t\"description\":{\n" +
                "\t\t\t\"type\":\"text\",\n" +
                "\t\t\t\"analyzer\":\"ik_max_word\",\n" +
                "\t\t\t\"search_analyzer\":\"ik_smart\"\n" +
                "\t\t},\n" +
                "\t\t\"pic\":{\n" +
                "\t\t\t\"type\":\"text\",\n" +
                "\t\t\t\"index\":false\n" +
                "\t\t}\n" +
                "\t}\n" +
                "}", XContentType.JSON);
        //操作索引对象
        IndicesClient indices = restHighLevelClient.indices();
        //执行创建
        CreateIndexResponse createIndexResponse = indices.create(createIndexRequest);
        //得到响应
        boolean acknowledged = createIndexResponse.isAcknowledged();
        System.out.println(acknowledged);
    }

    //添加文档
    @Test
    public void testAddDoc() throws IOException {
        //文档内容
        //准备json数据
        Map<String ,Object> jsonMap = new HashMap<>();
        jsonMap.put("name","spring cloud实战");
        jsonMap.put("description","本课程主要从四个章节进行讲解： 1.微服务架构入门 2.spring cloud 基础入门 3.实战Spring\n" +
                "Boot 4.注册中心eureka。");
        jsonMap.put("studymodel","20101");
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        jsonMap.put("timestamp",dateFormat.format(new Date()));
        jsonMap.put("price",5.6f);
        //创建索引请求对象
        IndexRequest indexRequest = new IndexRequest("xc_course","doc");
        //添加文档内容
        indexRequest.source(jsonMap);
        //通过client进行http的请求
        IndexResponse indexResponse = restHighLevelClient.index(indexRequest);
        //获取响应结果
        DocWriteResponse.Result result = indexResponse.getResult();
        System.out.println(result);

    }

    //查询文档
    @Test
    public void testGetDoc() throws  IOException{
        //查询请求对象
        GetRequest getRequest = new GetRequest("xc_course", "doc", "QWe9a3ABx0F0ZHyZ2N5m");
        //通过client发送查询请求
        GetResponse getResponse = restHighLevelClient.get(getRequest);
        //得到文档的内容
        Map<String, Object> sourceAsMap = getResponse.getSource();
        System.out.println(sourceAsMap);
    }
}