如何使用Curator操作zookeeper - 三劫散仙

package com.qin.curator.zk;

import java.io.File;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.curator.CuratorZookeeperClient;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.CuratorFrameworkFactory.Builder;
import org.apache.curator.framework.api.CreateBuilder;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZKUtil;

import framework.CrudExamples;
/**
 * @author qindongliang
 * curator操作zookeeper的
 * 基本例子
 * **/
public class CuratorTools {
	
	static CuratorFramework zkclient=null;
	static String nameSpace="php";
	static {
		
		  String zkhost="192.168.46.22:2181";//zk的host
		  RetryPolicy rp=new ExponentialBackoffRetry(1000, 3);//重试机制
		  Builder builder = CuratorFrameworkFactory.builder().connectString(zkhost)
				  .connectionTimeoutMs(5000)
				  .sessionTimeoutMs(5000)
				  .retryPolicy(rp);
		  builder.namespace(nameSpace);
		  CuratorFramework zclient = builder.build();
		  zkclient=zclient;
		  zkclient.start();// 放在这前面执行
		  zkclient.newNamespaceAwareEnsurePath(nameSpace);
		  
	}
	
	public static void main(String[] args)throws Exception {
		CuratorTools ct=new  CuratorTools();
		//ct.getListChildren("/zk/bb");
		//ct.upload("/jianli/123.txt", "D:\\123.txt");
		//ct.createrOrUpdate("/zk/cc334/zzz","c");
		//ct.delete("/qinb/bb");
		//ct.checkExist("/zk");
		ct.read("/jianli/123.txt");
		zkclient.close();
		
		
	}

	/**
	 * 创建或更新一个节点
	 * 
	 * @param path 路径
	 * @param content 内容
	 * **/
	public void createrOrUpdate(String path,String content)throws Exception{
		 
		zkclient.newNamespaceAwareEnsurePath(path).ensure(zkclient.getZookeeperClient());
	    zkclient.setData().forPath(path,content.getBytes());	
	    System.out.println("添加成功！！！");
		
	}
	
	/**
	 * 删除zk节点
	 * @param path 删除节点的路径
	 * 
	 * **/
	public void delete(String path)throws Exception{
		zkclient.delete().guaranteed().deletingChildrenIfNeeded().forPath(path);
		System.out.println("删除成功!");
	}
	
	
	/**
	 * 判断路径是否存在
	 * @param path
	 * **/
	public void checkExist(String path)throws Exception{
		
		if(zkclient.checkExists().forPath(path)==null){
			System.out.println("路径不存在!");
		}else{
			System.out.println("路径已经存在!");
		}
		
	}
	
	/**
	 * 读取的路径
	 * @param path
	 * **/
	public void read(String path)throws Exception{
		 
	 
		String data=new String(zkclient.getData().forPath(path),"gbk");
		
		System.out.println("读取的数据:" data);
		
	}
	
	
	/**
	 * @param path 路径
	 * 获取某个节点下的所有子文件
	 * */
	public void getListChildren(String path)throws Exception{
		
		List<String> paths=zkclient.getChildren().forPath(path);
		for(String p:paths){
			System.out.println(p);
		}
		
	}
	
	/**
	 * @param zkPath zk上的路径
	 * @param localpath 本地上的文件路径
	 * 
	 * **/
	public void upload(String zkPath,String localpath)throws Exception{
		
		createrOrUpdate(zkPath, "");//创建路径
		byte[] bs=FileUtils.readFileToByteArray(new File(localpath));
		zkclient.setData().forPath(zkPath, bs);
		System.out.println("上传文件成功！");
		
		
	}
	
	
	
	
	
}