Java判断IP是否在指定范围

public class ipTest {
 /**
  * 判断IP是否在指定范围；
  */
 
 public static boolean ipIsValid(String ipSection, String ip) {
  if (ipSection == null)
   throw new NullPointerException("IP段不能为空！");
  if (ip == null)
   throw new NullPointerException("IP不能为空！");
  ipSection = ipSection.trim();
  ip = ip.trim();
  final String REGX_IP = "((25[0-5]|2[0-4]//d|1//d{2}|[1-9]//d|//d)//.){3}(25[0-5]|2[0-4]//d|1//d{2}|[1-9]//d|//d)";
  final String REGX_IPB = REGX_IP + "//-" + REGX_IP;
  if (!ipSection.matches(REGX_IPB) || !ip.matches(REGX_IP))
   return false;
  int idx = ipSection.indexOf('-');
  String[] sips = ipSection.substring(0, idx).split("//.");
  String[] sipe = ipSection.substring(idx + 1).split("//.");
  String[] sipt = ip.split("//.");
  long ips = 0L, ipe = 0L, ipt = 0L;
  for (int i = 0; i < 4; ++i) {
   ips = ips << 8 | Integer.parseInt(sips[i]);
   ipe = ipe << 8 | Integer.parseInt(sipe[i]);
   ipt = ipt << 8 | Integer.parseInt(sipt[i]);
  }
  if (ips > ipe) {
   long t = ips;
   ips = ipe;
   ipe = t;
  }
  return ips <= ipt && ipt <= ipe;
 }
 public static void main(String[] args) {
  if (ipIsValid("192.168.1.1-192.168.1.10", "192.168.3.54")) {
   System.out.println("ip属于该网段");
  } else
   System.out.println("ip不属于该网段");
 }
}