怎样获取本机的真实IP地址

    日常生活中，很多人都不知道自己的IP地址是多少，下面我来分享给大家一个获取本机的真实IP地址的方法，代码如下：

1. import java.net.InetAddress;
2. import java.net.NetworkInterface;
3. import java.net.SocketException;
4. import java.util.Enumeration;
5. public class Main {
6.     public static void main(String[] args) throws SocketException {
7.         System.out.println(Main.getRealIp());
8.     }
9.     public static String getRealIp() throws SocketException {
10.         String localip = null;// 本地IP，如果没有配置外网IP则返回它
11.         String netip = null;// 外网IP
12.         Enumeration<NetworkInterface> netInterfaces = 
13.             NetworkInterface.getNetworkInterfaces();
14.         InetAddress ip = null;
15.         boolean finded = false;// 是否找到外网IP
16.         while (netInterfaces.hasMoreElements() && !finded) {
17.           NetworkInterface ni = netInterfaces.nextElement();
18.       Enumeration<InetAddress> address = ni.getInetAddresses();
19.             while (address.hasMoreElements()) {
20.                 ip = address.nextElement();
21.               if (!ip.isSiteLocalAddress() 
22.                         && !ip.isLoopbackAddress() 
23.                         && ip.getHostAddress().indexOf(":") == -1) {// 外网IP
24.                     netip = ip.getHostAddress();
25.                     finded = true;
26.                               break;
27.             } else if (ip.isSiteLocalAddress() 
28.                      && !ip.isLoopbackAddress() 
29.              && ip.getHostAddress().indexOf(":") == -1) {// 内网IP
30.                     localip = ip.getHostAddress();
31.                 }
32.             }
33.         }
34.         if (netip != null && !"".equals(netip)) {
35.             return netip;
36.         } else {
37.             return localip;
38.         }
39.     }
40. }