code: public static String urlDecode(final String part) {
  		try {
  			return URLDecoder.decode(part, DEFAULT_URL_ENCODING);
  		} catch (UnsupportedEncodingException e) {
  			throw new ImpossibleException(e);
  		}
  	}
docs: URL 解码，默认编码为 UTF-8。
  
  @param part
  待解码字符串
  @return 解码字符串