判断ip是否合法

    //用来判断ip是否合法

    public boolean checkIp(String tempIp) {        String regex = "(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)){3}";        Pattern p = Pattern.compile(regex);        Matcher m = p.matcher(tempIp);        return m.matches();    }