获取 ip 地址

StringBuilder IFCONFIG=new StringBuilder();
   try {
       for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
           NetworkInterface intf = en.nextElement();
           for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
               InetAddress inetAddress = enumIpAddr.nextElement();
               if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress() && inetAddress.isSiteLocalAddress()) {
               IFCONFIG.append(inetAddress.getHostAddress().toString()+"
");
               }

           }
       }
   } catch (SocketException ex) {
   }
   System.out.println(IFCONFIG);