1 public static void main(String[] args) {
 2     　　try {
 3              InetAddress address = InetAddress.getLocalHost();//获取的是本地的IP地址 //PC-20140317PXKX/192.168.0.121
 4              String hostAddress = address.getHostAddress());//192.168.0.121
 5              InetAddress address1 = InetAddress.getByName("www.wodexiangce.cn");//获取的是该网站的ip地址，比如我们所有的请求都通过nginx的，所以这里获取到的其实是nginx服务器的IP地
 6              String hostAddress1 = address1.getHostAddress());//124.237.121.122
 7              InetAddress[] addresses = InetAddress.getAllByName("www.baidu.com");//根据主机名返回其可能的所有InetAddress对象
 8              for(InetAddress addr:addresses){
 9              System.out.println(addr);//www.baidu.com/14.215.177.38
10              //www.baidu.com/14.215.177.37
11            }
12         } catch (UnknownHostException e) {
13              e.printStackTrace();
14       }
15  }

 1 /**
 2      * 获取服务器IP地址
 3      * @return
 4      */
 5     @SuppressWarnings("unchecked")
 6     public static String  getServerIp(){
 7         String SERVER_IP = null;
 8         try {
 9             Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();
10             InetAddress ip = null;
11             while (netInterfaces.hasMoreElements()) {
12                 NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
13                 ip = (InetAddress) ni.getInetAddresses().nextElement();
14                 SERVER_IP = ip.getHostAddress();
15                 if (!ip.isSiteLocalAddress() && !ip.isLoopbackAddress()
16                         && ip.getHostAddress().indexOf(":") == -1) {
17                     SERVER_IP = ip.getHostAddress();
18                     break;
19                 } else {
20                     ip = null;
21                 }
22             }
23         } catch (SocketException e) {
24             // TODO Auto-generated catch block
25             e.printStackTrace();
26         }
27
28         return SERVER_IP;
29     }
30 }