Java 校验 ip地址

 String ipAddr = vo.getIp();
            if(org.apache.commons.lang3.StringUtils.isNotEmpty(ipAddr)){
                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)$";
                if (ipAddr.matches(regex)) {
                  return true;
                }

            }