es索引的RestHighLevelClient实现

java代码：

import java.io.IOException;

import org.apache.http.HttpHost;

import org.elasticsearch.action.search.SearchRequest;

import org.elasticsearch.action.search.SearchResponse;

import org.elasticsearch.client.RestClient;

import org.elasticsearch.client.RestHighLevelClient;

import org.elasticsearch.search.SearchHit;

import org.elasticsearch.search.SearchHits;

import org.elasticsearch.search.builder.SearchSourceBuilder;

public class App3 {

    public static void main(String[] args) throws IOException {

         RestHighLevelClient client = new RestHighLevelClient(

                    RestClient.builder(

                            new HttpHost("localhost", 9200, "http")));

/*         Long start=System.currentTimeMillis();

         IndicesClient indicesClient=client.indices();

         DeleteIndexRequest deleteIndexRequest=new DeleteIndexRequest("person");

         DeleteIndexResponse delRes=indicesClient.deleteIndex(deleteIndexRequest);

         if(delRes.isAcknowledged()) {

             System.out.println("delete success");

         }else{

             System.out.println("delete failed");

         }

         System.out.println("耗时:"+(System.currentTimeMillis()-start)+" 毫秒");*/

         SearchRequest req=new SearchRequest("person");

         SearchSourceBuilder builder=new SearchSourceBuilder();

         builder.size(10);

         req.source(builder);

         SearchResponse res=client.search(req);

         SearchHits hits=res.getHits();

         SearchHit[] hitArr=hits.getHits();

         for(SearchHit hit:hitArr) {

             System.out.println(hit.getSourceAsString());

         }

        /**** Done ****/

        System.out.println("Done");

    }

}

无用的import自动删除快捷键

导入需要的包快捷键 shift+ctrl+o，自动导入包，当然也会清除掉多余的包。