连不上Zookeeper

老师测试一下

package com.imooc.zkjavaapi.watcher;

import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;

/**
 * 描述:      连接Watcher
 */
public class ConnectWatcher implements Watcher {


    @Override
    public void process(WatchedEvent watchedEvent) {
        System.out.println("ConnectWatcher的process被调用了");
        if (watchedEvent.getState() == Event.KeeperState.SyncConnected) {
            System.out.println("连接成功");
        }
        if (watchedEvent.getState() == Event.KeeperState.Closed) {
            System.out.println("连接关闭");
        }
    }

}

package com.imooc.zkjavaapi;

import com.imooc.zkjavaapi.watcher.ConnectWatcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.ZooKeeper.States;

import java.io.IOException;

/**
 * 描述:   连接到ZK
 */
public class FirstConnect {

    public static void main(String[] args) throws IOException, InterruptedException {
        ConnectWatcher connectWatcher = new ConnectWatcher();
        ZooKeeper zk = new ZooKeeper(ZKConstant.ZK_HOST, ZKConstant.CONNECT_TIMEOUT, connectWatcher);
        System.out.println("客户端开始连接ZK服务器");
        States state = zk.getState();
        System.out.println(state);
        Thread.sleep(2000);
        state = zk.getState();
        System.out.println(state);
        Thread.sleep(2000);
        zk.close();

    }
}

package com.imooc.zkjavaapi;

/**
 * 描述:     ZK常量类
 */
public class ZKConstant {

    public static final String ZK_HOST = "192.168.172.134:2181";
    public static final Integer CONNECT_TIMEOUT = 3000;
}