java如何获取本机IP

 1 import java.net.*;
 2 
 3 public class Test6 {
 4 
 5     public static void main(String[] args) {
 6         // TODO Auto-generated method stub
 7         InetAddress ia=null;
 8         try {
 9             ia=ia.getLocalHost();
10             
11             String localname=ia.getHostName();
12             String localip=ia.getHostAddress();
13             System.out.println("本机名称是："+ localname);
14             System.out.println("本机的ip是 ："+localip);
15         } catch (Exception e) {
16             // TODO Auto-generated catch block
17             e.printStackTrace();
18         }
19     }
20 
21 }

获取所有IPv4的IP地址：

 1 public static List<String> getLocalIPList() {
 2         List<String> ipList = new ArrayList<String>();
 3         try {
 4             Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
 5             NetworkInterface networkInterface;
 6             Enumeration<InetAddress> inetAddresses;
 7             InetAddress inetAddress;
 8             String ip;
 9             while (networkInterfaces.hasMoreElements()) {
10                 networkInterface = networkInterfaces.nextElement();
11                 inetAddresses = networkInterface.getInetAddresses();
12                 while (inetAddresses.hasMoreElements()) {
13                     inetAddress = inetAddresses.nextElement();
14                     if (inetAddress != null && inetAddress instanceof Inet4Address) { // IPV4
15                         ip = inetAddress.getHostAddress();
16                         ipList.add(ip);
17                     }
18                 }
19             }
20         } catch (SocketException e) {
21             e.printStackTrace();
22         }
23         return ipList;
24     }