從一串字串中匹配URL地址 正則 (可以沒有http或https開頭)

主要需求是可以匹配短URL 自己用了用感覺還不錯 太長的沒有嘗試

/**
     * 從字串中擷取出url地址
     *
     * @param text
     * @return
     */
    public static String getUrl(String text) {
        Pattern pattern = Pattern.compile("((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|((www.)|[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)");
        Matcher matcher = pattern.matcher(text);
        StringBuffer buffer = new StringBuffer();
        while (matcher.find()) {
            buffer.append(matcher.group());
        }
        return buffer.toString();
    }

正則

((http[s]{0,1}|ftp)://[a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,4})(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&*+?:_/=<>]*)?)|((www.)|[a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,4})(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&*+?:_/=<>]*)?)