摘要： public static boolean checkip(String ip) { final Pattern IP_PATTERN = Pattern.compile("([1-9]|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])(\\.(\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])){3}"); return IP_PATTERN.matcher(ip).matches(); } 阅读全文