java操作zookeeper

1、首先通过idea创建maven工程，并添加依赖
<!-- zkclient -->
<dependency>
    <groupId>com.101tec</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.11</version>
</dependency>

 

2  节点的创建修改删除（连接时间尽可能写长点，否则连接不上,同时在监听器那块，必须先序列化）
package zookeeper.curd;

import org.I0Itec.zkclient.exception.ZkMarshallingError;
import org.I0Itec.zkclient.serialize.ZkSerializer;

import java.io.UnsupportedEncodingException;

public class CustomerSerializer implements ZkSerializer {

    /** default utf 8 */
    private String charset = "UTF-8";


    public CustomerSerializer() {
        // TODO Auto-generated constructor stub
    }
    public CustomerSerializer(String charset) {
        this.charset = charset;
    }

    /**
     * 序列化
     */
    @Override
    public byte[] serialize(Object data) throws ZkMarshallingError {
        try {
            byte[] bytes = String.valueOf(data).getBytes(charset);
            return bytes;
        } catch (UnsupportedEncodingException e) {
            throw new ZkMarshallingError("Wrong Charset:" + charset);
        }
    }

    /**
     * 反序列化
     */
    @Override
    public Object deserialize(byte[] bytes) throws ZkMarshallingError {
        String result = null;
        try {
            result = new String(bytes, charset);
        } catch (UnsupportedEncodingException e) {
            throw new ZkMarshallingError("Wrong Charset:" + charset);
        }
        return result;
    }

}

package zookeeper.curd;


import org.I0Itec.zkclient.IZkDataListener;
import org.I0Itec.zkclient.ZkClient;
import org.apache.zookeeper.CreateMode;


import java.io.IOException;


public class TestCrud {
    //集群地址，如果是单机 写一个
    private static final String zkServer="47.100.100.223:2181,47.107.124.77:2181,114.116.246.18:2181";
    private static ZkClient zkClient=null;
    static {
        zkClient=new ZkClient(zkServer,50000,50000,new CustomerSerializer("UTF-8"));
    }
    public static void main(String[] args) throws IOException {
//       String s = zkClient.create("/java", "hello world", CreateMode.PERSISTENT);
//        System.out.println(s);
        //获取节点
//        String s = zkClient.readData("/java");
//        System.out.println(s);
        //监听数据的变化
        zkClient.subscribeDataChanges("/java", new IZkDataListener() {
            @Override
            public void handleDataChange(String dataPath, Object data) throws Exception {
                System.out.println(dataPath+"--handleDataDelete--"+data);
            }


            @Override
            public void handleDataDeleted(String dataPath) throws Exception {
                System.out.println(dataPath+"--handleDataDelete--");
            }
        });
        System.out.println("监听成功！！");
        //不让程序结束
        System.in.read();
    }
}

 

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