elasticsearch 初學入門

初學elasticsearch，查閱無數資料終得運行成功，本文環境基於Java、Windows。

1. elasticsearch版本：5.0.1，下載ZIP包，地址：點擊打開鏈接
2. 
   
3. 下載後解壓到C:\elasticsearch-5.0.1
4. 運行elasticsearch.bat，就在本機開啓一個elasticsearch節點
5. 瀏覽器訪問 http://localhost:9200/ ，如果能夠正常訪問，說明該節點配置成功。
6. Java Maven 項目調用 elasticsearch API，直接貼代碼

pom.xml文件詳見 pom.xml

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


    	@SuppressWarnings("resource")


    	TransportClient client = new PreBuiltTransportClient(Settings.EMPTY).addTransportAddress(new InetSocketTransportAddress(


    	InetAddress.getByName("127.0.0.1"), 9300));


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


    	json.put("user", "jack k");


    	json.put("postDate", "2016-11-23");


    	json.put("message", "es demo");


    	client.prepareIndex("twitter", "tweet", "1").setType("muti_field").setSource(json).execute().actionGet();


    	GetResponse response = client.prepareGet("twrite", "tweet", "1").execute().actionGet();


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


    	Iterator<Entry<String, Object>> iter = map.entrySet().iterator();


		while (iter.hasNext()) {


			Entry<String, Object> ent = iter.next();


			System.out.println(ent.getKey() + "=" + ent.getValue());


		}


		QueryBuilder qb = QueryBuilders.matchQuery("user", "jack");


		SearchResponse scrollResp = client.prepareSearch("twitter")


				.setSearchType(SearchType.DEFAULT)


				.setScroll(new TimeValue(60000)).setQuery(qb).setSize(100)


				.execute().actionGet();


		System.out.println("通過user字段查詢:" + scrollResp);


		System.out.println(


				"通過user字段查詢信息數量:" + 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() + " : " + rpEnt.getValue());


			}


		}


		client.close();


	}