public String urlDecode(String s) {
        if (s == null || s.isEmpty()) {
            return s;
        }
        return URL.decodeQueryString(s);
    }
public String urlDecode ( String s ) { if ( s == null || s . isEmpty ( ) ) { return s ; } return URL . decodeQueryString ( s ) ; }
URLDecode a string
@param s
@return