校验IP是否合法

/**

*IP地址校验

*@paramipStr

*@return

*/

public static booleanisIP(String ipStr) {

String num ="(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)";

String regex ="^"+ num +"\\."+ num +"\\."+ num +"\\."+ num +"$";

Pattern pattern = Pattern.compile(regex);

Matcher matcher = pattern.matcher(ipStr);

returnmatcher.matches();

}