ESTest_Doc_Query

package com.dym.es.test;
 
import org.apache.http.HttpHost;
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.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
 
 
public class ESTest_Doc_Query {
    public static void main(String[] args) throws Exception {
 
        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
 
        // 1. 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());
        }
 
        esClient.close();
    }
}