code: public String read(String path, Watcher watcher, Stat stat) throws InterruptedException, KeeperException {
  
          byte[] data = zk.getData(path, watcher, stat);
          return new String(data, CHARSET);
      }
docs: @param path
  @param watcher
  
  @return String
  
  @throws InterruptedException
  @throws KeeperException
  @Description: 读数据
  @author liaoqiqi
  @date 2013-6-14