java ip地址格式正则匹配代码

Pattern pattern = Pattern.compile("\b((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\.((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\.((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\.((?!\d\d\d)\d+|1\d\d|2[0-4]\d|25[0-5])\b");

Matcher matcher = pattern.matcher(ip); //验证IP地址有效性

if(!matcher.matches()){
    System.out.println(ip+"错误的IP请求参数!");
}