for (Enumeration<NetworkInterface> en = NetworkInterface
   .getNetworkInterfaces(); en.hasMoreElements();) {
  NetworkInterface intf = en.nextElement();
  if (intf.getName().toLowerCase().equals("eth0") || intf.getName().toLowerCase().equals("wlan0")) { 
   for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
   InetAddress inetAddress = enumIpAddr.nextElement();
   if (!inetAddress.isLoopbackAddress()) {
    ipaddress = inetAddress.getHostAddress().toString();
    if(!ipaddress.contains("::")){//ipV6的地址
    return ipaddress;
    }
   }
   }
  } else {
   continue;
  }
}