code: public static URL[] getURLs(File... files) {
  		final URL[] urls = new URL[files.length];
  		try {
  			for (int i = 0; i < files.length; i++) {
  				urls[i] = files[i].toURI().toURL();
  			}
  		} catch (MalformedURLException e) {
  			throw new UtilException(e, "Error occured when get URL!");
  		}
  
  		return urls;
  	}
docs: 获得URL，常用于使用绝对路径时的情况
  
  @param files URL对应的文件对象
  @return URL
  @exception UtilException MalformedURLException