Es中的查询操作

package com.atguigu.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.GetIndexRequest;
import org.elasticsearch.client.indices.GetIndexResponse;
import org.elasticsearch.cluster.metadata.AliasMetadata;
import org.elasticsearch.cluster.metadata.MappingMetadata;
import org.elasticsearch.common.settings.Settings;
import java.io.IOException;
import java.util.List;
import java.util.Map;

public class ESTest_Index_Search {
    public static void main(String[] args) throws IOException {
        //创建ES客户端
        HttpHost httpHost = new HttpHost("localhost", 9200, "http");
        RestHighLevelClient esClient = new RestHighLevelClient(RestClient.builder(httpHost));
        //查询索引
        GetIndexRequest request = new GetIndexRequest("user");
       GetIndexResponse getIndexResponse =
                esClient.indices().get(request,RequestOptions.DEFAULT);
        //查询的返回状态
        Map> aliases = getIndexResponse.getAliases();
        Map mappings = getIndexResponse.getMappings();
        Map settings = getIndexResponse.getSettings();
        System.out.println("aliases："+aliases);
        System.out.println("mappings："+mappings);
        System.out.println("settings："+settings);
        //关闭ES客户端
        esClient.close();
    }
}