正则表达式验证IP地址

    public static boolean validatorIp(String ipStr) {
        String pattern = "(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])$";
        Pattern p = Pattern.compile(pattern);


        Matcher m = p.matcher(ipStr);
        return m.matches();
    }