<dependency>
	<groupId>com.101tec</groupId>
	<artifactId>zkclient</artifactId>
	<version>0.11</version>
</dependency>

@Test
public void testCreateNode() {
	//建立連接
	//zkServers: Zookeeper服務器IP地址和端口號，如果是集群情況下用逗號分割多個Zookeeper服務器地址
	//sessionTimeout: 會話超時時間
	//connectionTimeout: 連接超時時間
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);

	//創(chuàng)建數(shù)據(jù)
	Student student = new Student();
	student.setName("張三");
	student.setAge(18);
	student.setPhone("1585454xxxx");

	//創(chuàng)建持久節(jié)點
	zkClient.createPersistent("/p_node", student);
	//創(chuàng)建持久順序節(jié)點
	zkClient.createPersistentSequential("/ps_node", student);
	//創(chuàng)建臨時節(jié)點
	zkClient.createEphemeral("/e_node", student);
	//創(chuàng)建臨時順序節(jié)點
	zkClient.createEphemeralSequential("/ps_node", student);

	//關閉客戶端
	//關閉客戶端的同時，前面創(chuàng)建的臨時節(jié)點也會被刪除
	zkClient.close();
}

@Test
public void testReadNodeData() {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);

	Stat stat = new Stat();
	Student student = zkClient.readData("/p_node", stat);
	System.out.println("節(jié)點狀態(tài)信息：" + JSON.toJSONString(student));
	System.out.println("節(jié)點數(shù)據(jù)：" + JSON.toJSONString(stat));

	zkClient.close();
}
//輸出結果：
//節(jié)點狀態(tài)信息：{"age":18,"name":"張三","phone":"1585454xxxx"}
//節(jié)點數(shù)據(jù)：{"aversion":0,"ctime":1619165355431,"cversion":0,"czxid":165,"dataLength":260,"ephemeralOwner":0,"mtime":1619165355431,"mzxid":165,"numChildren":0,"pzxid":165,"version":0}

@Test
public void testDeleteNode() {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);

	//刪除節(jié)點，不能刪除帶有子節(jié)點的節(jié)點
	zkClient.delete("/p_node");
	//刪除節(jié)點，遞歸刪除所有子孫節(jié)點
	zkClient.deleteRecursive("/p_node2");

	zkClient.close();
}

@Test
public void testWriteNodeData() {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);

	//更新節(jié)點數(shù)據(jù)
	zkClient.writeData("/p_node", "myData1");
	//使用CAS更新節(jié)點數(shù)據(jù)
	//zkClient.writeData("/p_node", "myData2", 1);

	zkClient.close();
}

@Test
public void testGetChildNodes() {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);

	//獲取子節(jié)點列表
	List<String> childList = zkClient.getChildren("/p_node");
	childList.stream().forEach(System.out::println);

	zkClient.close();
}

@Test
public void testSubscribeChildChanges() throws IOException {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);
	zkClient.subscribeChildChanges("/p_node", new IZkChildListener(){

		//子節(jié)點改變時調用
		@Override
		public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception {
			System.out.println(parentPath + "子節(jié)點發(fā)生改變");
			System.out.println("當前子節(jié)點列表：" + currentChilds);
		}

	});

	//阻塞客戶端，便于測試
	System.in.read();
}

@Test
public void testSubscribeDataChanges() throws IOException {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);
	zkClient.subscribeDataChanges("/p_node", new IZkDataListener(){

		//節(jié)點數(shù)據(jù)改變時調用
		@Override
		public void handleDataChange(String dataPath, Object data) throws Exception {
			System.out.println(dataPath + "節(jié)點數(shù)據(jù)發(fā)生變化");
			System.out.println("修改后的數(shù)據(jù)為：" + data.toString());
		}

		//節(jié)點被刪除時調用
		@Override
		public void handleDataDeleted(String dataPath) throws Exception {
			System.out.println(dataPath + "節(jié)點已被刪除");
		}
	});

	//阻塞客戶端，便于測試
	System.in.read();
}

@Test
public void testSubscribeStateChanges() throws IOException {
	ZkClient zkClient = new ZkClient("127.0.0.1:2181", 60000, 5000);
	zkClient.subscribeStateChanges(new IZkStateListener(){

		//當zookeeper連接狀態(tài)改變時調用
		@Override
		public void handleStateChanged(Watcher.Event.KeeperState state) throws Exception {
			System.out.println("當前狀態(tài)" + state);
		}

		//在zookeeper會話過期并且創(chuàng)建了一個新的會話之后調用
		@Override
		public void handleNewSession() throws Exception {
			System.out.println("會話過期，已創(chuàng)建新的會話");
		}

		//當會話不能重新建立時調用
		@Override
		public void handleSessionEstablishmentError(Throwable error) throws Exception {
			error.printStackTrace();
		}
	});

	//阻塞客戶端，便于測試
	System.in.read();
}