maven项目使用java接口连接elasticsearch，基本操作：增删改查

创建maven项目，创建myElasticSearch.java文件，在App.java(默认创建文件)中的Main()执行。

---

pom.xml文件

  4.0.0

  com.test
  myES
  0.0.1-SNAPSHOT
  jar

  myES
  http://maven.apache.org

  
    UTF-8
  

  
    
      junit
      junit
      3.8.1
      test
    
    
	    org.elasticsearch
	    elasticsearch
	    2.3.0
	
	
	
	    com.fasterxml.jackson.core
	    jackson-databind
	    2.6.2
	
  

---

myElasticSearch.java

package com.test.myES;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;

import org.elasticsearch.action.admin.indices.create.CreateIndexRequestBuilder;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.bulk.BulkRequestBuilder;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import static org.elasticsearch.common.xcontent.XContentFactory.*;



public class myElasticSearch{
	
	//private Logger logger
	public final static String HOST = "127.0.0.1";
	public final static int PORT = 9300;
	public final static String _cluster_name = "my_ElasticcSearch_10";
	public final static String _index = "es1024";
	
	public final static String _type = "t_link";
	public Client client = null;
	
	public myElasticSearch(){
		
	}
	
	public void openConnectES() throws UnknownHostException{
		Settings settings = Settings.settingsBuilder()
				.put("cluster.name", "my_ElasticcSearch_10").build();
		client = TransportClient.builder().settings(settings).build()
				.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));
	}
	public void closeConnectES(){
		client.close();
	}
	
	//创建索引index--类似于数据库
	public void createIndex() throws IOException{
		XContentBuilder mapping = XContentFactory.jsonBuilder()
				.startObject()
					.startObject("settings")
						.field("number_of_shards", 2)	//分片数量
						.field("number_of_replicas", 0)	//副本数量
					.endObject()
				.endObject()
				.startObject()
					.startObject("t_type")	//表名称
						.startObject("properties")	//列属性
							.startObject("type").field("type", "string").field("store", "yes")
							.endObject()
							.startObject("eventCount").field("type", "long").field("store", "yes")
							.endObject()
							.startObject("eventDate").field("type", "date")
							  .field("format", "dateOptionalTime").field("stroe","yes")
							.endObject()
							.startObject("message").field("type", "string")
								.field("index", "not_analyzed").field("stroe", "yes")
							.endObject()
						.endObject()
					.endObject()
				.endObject();
		CreateIndexRequestBuilder cirb = client.admin().indices()
				.prepareCreate("i_index")
				.setSource(mapping);
		CreateIndexResponse response = cirb.execute().actionGet();
		if(response.isAcknowledged()){
			System.out.println("Index created.");
		}else{
			System.err.println("Index creation failed.");
		}
		
	}
	public void insert() throws IOException{
		IndexResponse response = client
				.prepareIndex("i_index", "t_type", "1")
				.setSource(
						jsonBuilder().startObject()
						.field("type", "syslog")
						.field("eventCount", 1)
						.field("eventDate", new Date())
						.field("message", "i_index insert doc test")
					.endObject()).get();
		System.out.println("index"+response.getIndex()
								+" insert doc id:"+response.getId()
								+" result:"+response.isCreated());
	}
	public void update() throws IOException, InterruptedException, ExecutionException{
		UpdateRequest updateRequest = new UpdateRequest();
		updateRequest.index("i_index");
		updateRequest.type("t_type");
		updateRequest.id("1");
		updateRequest.doc(
				jsonBuilder()
				.startObject().field("type", "file").endObject());
		client.update(updateRequest).get();
	}
	public void updateIfNoExist() throws IOException, InterruptedException, ExecutionException{
		IndexRequest indexRequest = new IndexRequest("i_index", "t_type", "100")
			.source(jsonBuilder()
				.startObject()
					.field("type", "syslog")
					.field("eventCount", 2)
					.field("eventDate", new Date())
					.field("message", "i_index insert doc test")
				.endObject());
		UpdateRequest updateRequest = new UpdateRequest("i_index", "t_type", "100")
			.doc(jsonBuilder().startObject().field("type","file").endObject())
			.upsert(indexRequest);	//upsert:更新插入
		client.update(updateRequest).get();
	}
	
	public void delete(){
		//删除文档
		DeleteResponse deleteReponse = client.prepareDelete("i_index", "t_type", "100").get();
		boolean isFound = deleteReponse.isFound();
		
		//删除索引
		DeleteIndexRequest delete = new DeleteIndexRequest("i_index");
		client.admin().indices().delete(delete);
	}
	
	public void query() throws UnknownHostException{
		GetResponse response = client.prepareGet(_index, _type, "11056").get();
		String source = response.getSource().toString();
		long version = response.getVersion();
		String indexName = response.getIndex();
		String type = response.getType();
		String id = response.getId();		
		
/*
		Settings settings = Settings.settingsBuilder().put("cluster.name", "my_ElasticcSearch_10").build();
		 
		try {
 
			Client client = TransportClient.builder().settings(settings).build()
					.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));
 
			// 批量创建索引
			BulkRequestBuilder bulkRequest = client.prepareBulk();
			Map map = new HashMap<>();
			map.put("link", "Jack");
 
			IndexRequest request = client.prepareIndex("es1024", "t_link").setSource(map).request();
			bulkRequest.add(request);
			BulkResponse bulkResponse = bulkRequest.execute().actionGet();
			if (bulkResponse.hasFailures()) {
				System.out.println("批量创建索引错误！");
			}
			
			GetResponse response = client.prepareGet("es1024", "t_link", "11056").get();
			String source = response.getSource().toString();
			
			client.close();
			System.out.println("批量创建索引成功");
		} catch (UnknownHostException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}		
*/
	}
}

 

---

App.java

package com.test.myES;

import java.io.IOException;
import java.util.concurrent.ExecutionException;

/**
 * Hello world!
 *
 */
public class App 
{
    public static void main( String[] args ) throws IOException, InterruptedException, ExecutionException
    {
    	myElasticSearch m = new myElasticSearch();
    	m.openConnectES();
    	//m.createIndex();			//创建索引（数据库）
    	//m.insert();				//插入一列数据（数据库）
    	//m.update();					//更新数据
    	//m.delete();
    	//m.query();
    	m.closeConnectES();
        System.out.println( "Hello World!" );
    }
}