1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   *
12   *
13   */
14  
15  package com.liferay.portal.kernel.util;
16  
17  import com.liferay.portal.SystemException;
18  
19  import java.net.Inet4Address;
20  import java.net.InetAddress;
21  import java.net.NetworkInterface;
22  
23  import java.util.Enumeration;
24  
25  /**
26   * <a href="InetAddressUtil.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Michael C. Han
29   * @author Shuyang Zhou
30   */
31  public class InetAddressUtil {
32  
33      public static InetAddress getLocalInetAddress() throws Exception {
34          Enumeration<NetworkInterface> enu1 =
35              NetworkInterface.getNetworkInterfaces();
36  
37          while (enu1.hasMoreElements()) {
38              NetworkInterface networkInterface = enu1.nextElement();
39  
40              Enumeration<InetAddress> enu2 =
41                  networkInterface.getInetAddresses();
42  
43              while (enu2.hasMoreElements()) {
44                  InetAddress inetAddress = enu2.nextElement();
45  
46                  if (!inetAddress.isLoopbackAddress() &&
47                      (inetAddress instanceof Inet4Address)) {
48  
49                      return inetAddress;
50                  }
51              }
52          }
53  
54          throw new SystemException("No local internet address");
55      }
56  
57  }