elasticsearch Java接口汇总

服务器端和客户端的elasticsearch版本号须一致

setExplain(true)设置是否按查询匹配度排序

import java.util.Date;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import org.elasticsearch.action.delete.DeleteResponse;

import org.elasticsearch.action.get.GetResponse;

import org.elasticsearch.action.index.IndexResponse;

import org.elasticsearch.action.search.SearchResponse;

import org.elasticsearch.action.search.SearchType;

import org.elasticsearch.client.transport.TransportClient;

import org.elasticsearch.common.transport.InetSocketTransportAddress;

import org.elasticsearch.common.unit.TimeValue;

import org.elasticsearch.index.query.QueryBuilder;

import org.elasticsearch.index.query.QueryBuilders;

import org.elasticsearch.search.SearchHit;

public class Searcher {

    private TransportClient client;

    

    public void init(){

        client = new TransportClient().addTransportAddress(

                new InetSocketTransportAddress("10.18.6.90", 9300));// localhost9300

    }

    

    //生成索引

    public void generateIndex() {

        Map<String, Object> json = new HashMap<String, Object>();

        json.put("user", "hdidkv");

        json.put("postDate", new Date());

        json.put("message", "哥大富大贵");

        IndexResponse response = this.client

            .prepareIndex("twitter", "tweet", "1")

            .setSource(json)

            .execute()

            .actionGet();

    }

    //查看索引

    public void getIndex() {

       GetResponse response = client.prepareGet("twitter", "test", "1")

            .execute().actionGet();

       Map<String, Object> rpMap = response.getSource();

       if (rpMap == null) {

           System.out.println("empty");

           return;

       }

       

       Iterator<Entry<String, Object>> rpItor = rpMap.entrySet().iterator();

       while (rpItor.hasNext()) {

           Entry<String, Object> rpEnt = rpItor.next();

           System.out.println(rpEnt.getKey() + " : " + rpEnt.getValue());

       }

   }

    

    

    //创建一个termQuery查询

    public void searchIndex() {

          QueryBuilder qb = QueryBuilders.termQuery("user", "hdidkv");

          SearchResponse scrollResp = client.prepareSearch("twitter")

                  //.setSearchType(SearchType.SCAN)

                  .setTypes("tweet")

                  .setScroll(new TimeValue(60000))

                  .setQuery(qb)

                  .setSize(100).execute().actionGet(); //100 hits per shard will be returned for each scroll

          

          //Scroll until no hits are returned

          while (true) {

              scrollResp = client.prepareSearchScroll(scrollResp.getScrollId()).

                      setScroll(new TimeValue(600000)).execute().actionGet();

              System.out.println(scrollResp.getHits().getTotalHits());

              for (SearchHit hit : scrollResp.getHits()) {

                  Iterator<Entry<String, Object>> rpItor = hit.getSource().entrySet().iterator();

                  while (rpItor.hasNext()) {

                      Entry<String, Object> rpEnt = rpItor.next();

                      System.out.println(rpEnt.getKey() + " 1:1 " + rpEnt.getValue());

                  }

              }

              

              if (scrollResp.getHits().hits().length == 0) {

                  break;

              }

          }

    }

    //删除索引

    public void deleteIndex() {

        DeleteResponse response = client.prepareDelete("twitter", "tweet", "1")

           .execute().actionGet();

    }

    

    //关闭连接

    public void closeClient() {

        this.client.close();

    }

    

    //练习使用elasticsearch的Java接口

    public static void main(String[] args) {

        //TransportClient client = new TransportClient().addTransportAddress(new InetSocketTransportAddress("10.18.6.90", 9200));

        Searcher searcher = new Searcher();

        searcher.init();

        

        searcher.generateIndex();

        //searcher.getIndex();

        

        searcher.searchIndex();

        

        searcher.closeClient();

    }

}