InetAddress

这个方法不是很稳定

  1. String hostAddress = InetAddress.getLocalHost().getHostAddress();  // 192.168.1.15

NetworkInterface

比较稳定，遍历网卡，获取IP列表。

  1. import org.springframework.util.Assert;
  3. import java.net.InetAddress;
  4. import java.net.NetworkInterface;
  5. import java.net.SocketException;
  6. import java.util.*;
  8. /**
  9.  * 网络攻击类
  10.  */
  11. public class NetUtil {
  12.     /**
  13.      * 获取IP列表
  14.      * @return
  15.      * @throws SocketException
  16.      */
  17.     public static HashSet<String> getLocalIpAddr() throws SocketException {
  18.         HashSet<String> ipList = new HashSet<>();
  19.         Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
  20.         while (interfaces.hasMoreElements()) {
  21.             NetworkInterface ni = (NetworkInterface) interfaces.nextElement();
  22.             Enumeration ipAddrEnum = ni.getInetAddresses();
  23.             while (ipAddrEnum.hasMoreElements()) {
  24.                 InetAddress addr = (InetAddress) ipAddrEnum.nextElement();
  25.                 if (addr.isLoopbackAddress()) {
  26.                     continue;
  27.                 }
  28.                 String ip = addr.getHostAddress();
  29.                 //skip the IPv6 addr
  30.                 if (ip.contains(":")) {
  31.                     continue;
  32.                 }
  33.                 // 去掉以1结尾的
  34.                 if (ip.endsWith(".1")) {
  35.                     continue;
  36.                 }
  37.                 ipList.add(ip);
  38.             }
  39.         }
  40.         Assert.isTrue(ipList.size() > 0, "没有获取到IP");
  41.         return ipList;
  42.     }
  44.     public static void main(String args[]) throws SocketException {
  45.         HashSet<String> localIpAddr = getLocalIpAddr();
  46.         System.out.println(localIpAddr);
  47.     }
  48. }