java IP验证

得到当前电脑的IP
InetAddress myComputer=InetAddress.getLocalHost(); //取得主机位置对象
System.out.println(myComputer.getHostAddress());

IP验证正则
String regex = "^(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|[1-9])\\."
                 + "(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)$";