code: public static WatchMonitor createAll(URL url, Watcher watcher){
  		try {
  			return createAll(Paths.get(url.toURI()), watcher);
  		} catch (URISyntaxException e) {
  			throw new WatchException(e);
  		}
  	}
docs: 创建并初始化监听，监听所有事件
  @param url URL
  @param watcher {@link Watcher}
  @return {@link WatchMonitor}