code: public static String urlDecode(String s) {
  		if (s == null) {
  			return "";
  		}
  		String decoded = s;
  		try {
  			decoded = URLDecoder.decode(s, Config.DEFAULT_ENCODING);
  		} catch (UnsupportedEncodingException ex) {
  			logger.error(null, ex);
  		}
  		return decoded;
  	}
docs: Decodes a URL-encoded string.
  @param s a string
  @return the decoded string