大数据之hadoop[zookeeper] javaCRUD

java crud 操作 package com.uplooking.bigdata.zookeeper;import org.apache.zookeeper.*; import org.apache.zookeeper.data.Stat; import org.junit.After; import org.junit.Before; import org.junit.Test;import java.io.IOException;/**  * Created by thinkpad on 2016/10/24.  */ public class ZooKeeperTest {    private ZooKeeper zk;    @Before    public void setUp() throws IOException {        String connectStr = "master:2181";        int sessionTimeOut = 20000;        zk = new ZooKeeper(connectStr, sessionTimeOut, new Watcher() {            public void process(WatchedEvent watchedEvent) {                System.out.println("zookeeper服务监听了" + watchedEvent.getType() + "事件");            }        });    }    @Test    public void testCRUD() throws KeeperException, InterruptedException {        //创建一个zk节点        String ret = zk.create("/zk", "parent".getBytes(),                ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);        System.out.println("ret: " + ret);        //获取zk节点中的数据信息        byte[] bytes = zk.getData("/zk", false, new Stat());        System.out.println(new String(bytes));        //创建子节点-->临时子节点        String child = zk.create("/zk/child", "child".getBytes(), ZooDefs.Ids.OPEN_ACL_UNSAFE,                CreateMode.EPHEMERAL);        System.out.println("child: " + child);        zk.delete("/zk", -1);    }    @After    public void cleanUp() {    } }