java客户端连接zookeeper

一、使用官方的maven依赖：

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
        </dependency>

代码：

   ZooKeeper zooKeeper = new ZooKeeper("192.168.233.11:2182,192.168.233.11:2183,192.168.233.11:2184", 20000, new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                String path = event.getPath();
                System.out.println("path:"+path);
                System.out.println("state:"+event.getState());
                System.out.println("type: "+event.getType());
                System.out.println("wrapper: "+event.getWrapper());
            }
        });

        /**
         * //创建永久节点
         * zooKeeper.create("/lock/pp","aaaa".getBytes(StandardCharsets.UTF_8), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
         * //创建永久顺序节点
         * String response = zooKeeper.create("/lock/pp", "aaaa".getBytes(StandardCharsets.UTF_8), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL);
         * //创建临时节点
         * zooKeeper.create("/lock/temp","aaaa".getBytes(StandardCharsets.UTF_8), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
         * //创建临时顺序节点
         * zooKeeper.create("/lock/temp","aaaa".getBytes(StandardCharsets.UTF_8), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL);
         *   //查询节点的数据
         *   byte[] data = zooKeeper.getData("/lock/pp", false, null);
         *
         *  //修改节点的数据
         *  zooKeeper.setData("/lock/pp", "bbd".getBytes(StandardCharsets.UTF_8), 0);
         *
         *  //判断路径是否存在
         *   zooKeeper.exists("/lock/pp33", false);
         *   //删除节点
         *    zooKeeper.delete("/lock",0);
            //递归删除使用
           ZKUtil.deleteRecursive(zk,"/lock")
         */

        //注册事件
        List<String> children = zooKeeper.getChildren("/lock/pp", new Watcher() {
            @Override
            public void process(WatchedEvent event) {
                System.out.println("收到回调事件。。。。。。。。。。。。。。。。。。。。");
                String path = event.getPath();
                System.out.println("path:" + path);
                System.out.println("state:" + event.getState());
                System.out.println("type: " + event.getType());
                System.out.println("wrapper: " + event.getWrapper());
            }
        });
        //创建子节点，触发事件
        zooKeeper.create("/lock/pp/ll","aaaa".getBytes(StandardCharsets.UTF_8), ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);

        TimeUnit.SECONDS.sleep(15);

 方案二、第三方对官方依赖的封装：

       <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
        </dependency>

 代码：

package com.example.mybatis.demo_mybatis;

import org.I0Itec.zkclient.IZkChildListener;
import org.I0Itec.zkclient.ZkClient;
import org.apache.zookeeper.*;
import org.apache.zookeeper.data.Stat;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.sql.Statement;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * author: yangxiaohui
 * date:   2023/7/10
 */
public class Test {
    public static void main(String[] args) throws InterruptedException {

        ZkClient zkClient = new ZkClient("192.168.233.11:2182,192.168.233.11:2183,192.168.233.11:2184",20);
        //创建永久节点
       // zkClient.create("/lock/nn","aa",CreateMode.PERSISTENT);
        //获取节点数据
       // Object o = zkClient.readData("/lock/nn");
        //创建永久顺序节点
        //zkClient.createPersistentSequential("/lock/nn","aa");
        //修改数据
       // zkClient.writeData("/lock/nn","dd");
        //递归删除
      //  zkClient.deleteRecursive("/lock/nn");

        //开启监控
        zkClient.subscribeChildChanges("/lock", new IZkChildListener() {
            @Override
            public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception {
                System.out.println("收到回调");
                System.out.println("parentPath: "+parentPath+"currentChild: "+currentChilds);
            }
        });
        //创建子节点
        zkClient.create("/lock/nnd","cc",CreateMode.EPHEMERAL);

        TimeUnit.SECONDS.sleep(20);

      

    

    }
}