ES-入门-JavaAPI-索引-查询-删除

package com.atgulgu.es.test;

import org.apache.http.HttpHost;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.CreateIndexResponse;

/**
 * ClassName: ESTest_Client
 * Package: com.atgulgu.es.test
 *
 * @Author 杨小燕
 * @Create 2024/10/7 0007 23:37
 * @Version 1.0
 */
public class ESTest_index_Create {
    public static void main(String[] args)  throws  Exception {
      //创建ES客户单
        RestHighLevelClient esClient =  new RestHighLevelClient(
                RestClient.builder(new HttpHost("192.168.1.108",9200,"http"))
        );


        //创建索引
       CreateIndexRequest  request = new CreateIndexRequest("user");
        CreateIndexResponse createIndexResponse = esClient.indices().create(request, RequestOptions.DEFAULT);
        //响应状态
        boolean acknowledged = createIndexResponse.isAcknowledged();
        System.out.println("索引操作：" +acknowledged);

        //关闭ES客户端

        esClient.close();
    }
}

上述是创建索引的操作

下面是使用代码查询索引信息

package com.atgulgu.es.test;

import org.apache.http.HttpHost;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
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.elasticsearch.client.indices.GetIndexResponse;

/**
 * ClassName: ESTest_Client
 * Package: com.atgulgu.es.test
 *
 * @Author 杨小燕
 * @Create 2024/10/7 0007 23:37
 * @Version 1.0
 */
public class ESTest_index_Search {
    public static void main(String[] args)  throws  Exception {
      //创建ES客户单
        RestHighLevelClient esClient =  new RestHighLevelClient(
                RestClient.builder(new HttpHost("192.168.1.108",9200,"http"))
        );


        //查询索引
        GetIndexRequest  request = new GetIndexRequest("user");
        GetIndexResponse getIndexResponse = esClient.indices().get(request, RequestOptions.DEFAULT);
        //响应状态
        System.out.println(getIndexResponse.getAliases());
        System.out.println(getIndexResponse.getMappings());
        System.out.println(getIndexResponse.getSettings());

        //关闭ES客户端

        esClient.close();
    }
}

执行结果如下:

package com.atgulgu.es.test;

import org.apache.http.HttpHost;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.client.indices.GetIndexResponse;

/**
 * ClassName: ESTest_Client
 * Package: com.atgulgu.es.test
 *
 * @Author 杨小燕
 * @Create 2024/10/7 0007 23:37
 * @Version 1.0
 */
public class ESTest_index_Delete {
    public static void main(String[] args)  throws  Exception {
      //创建ES客户单
        RestHighLevelClient esClient =  new RestHighLevelClient(
                RestClient.builder(new HttpHost("192.168.1.108",9200,"http"))
        );


        //查询索引
        DeleteIndexRequest request = new DeleteIndexRequest("user");
        AcknowledgedResponse response = esClient.indices().delete(request, RequestOptions.DEFAULT);
        //响应状态
        System.out.println(response.isAcknowledged());

        //关闭ES客户端

        esClient.close();
    }
}

删除索引的执行结果