ES 全量查询的代码

package com.atgulgu.es.test;

import org.apache.http.HttpHost;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;

/**
 * ClassName: ESTest_Client
 * Package: com.atgulgu.es.test
 *
 * @Author
 * @Create 2024/10/7 0007 23:37
 * @Version 1.0
 */
public class ESTest_Doc_Query {
    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"))
        );


     //查询索引中全部的数据
        SearchRequest request  = new SearchRequest();
        request.indices("user");

        request.source(new SearchSourceBuilder().query(QueryBuilders.matchAllQuery()));
        SearchResponse response = esClient.search(request, RequestOptions.DEFAULT);
        SearchHits  hits = response.getHits();
        System.out.println(hits.getTotalHits());
        System.out.println(response.getTook());

        for (SearchHit hit : hits){
            System.out.println(hit.getSourceAsString());
        }

        //关闭ES客户端

        esClient.close();
    }
}

执行结果如下图