ip地址验证的正则表达式
String regex = "^(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
+ "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
+ "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
+ "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)$";
原文链接：https://www.f2er.com/regex/361868.html