获取本地IP

vincent_hika

于 2013-04-18 14:03:55 发布

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CC 4.0 BY-SA版权

文章标签：发现IP

本文链接：https://blog.youkuaiyun.com/vincent_hika/article/details/8818663

本文介绍了一种通过Java代码获取设备上'eth0'或'wlan0'接口的IPv4地址的方法。该方法利用了NetworkInterface和InetAddress类来遍历网络接口并找到指定名称接口的IP地址。

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public static final String getLocalIpAddress() {
  String networkIp = null;
  try {
   List<NetworkInterface> interfaces = Collections
     .list(NetworkInterface.getNetworkInterfaces());
   for (NetworkInterface iface : interfaces) {
    if (iface.getDisplayName().equals("eth0")) {
     List<InetAddress> addresses = Collections.list(iface
       .getInetAddresses());
     for (InetAddress address : addresses) {
      if (address instanceof Inet4Address) {
       networkIp = address.getHostAddress();
      }
     }
    } else if (iface.getDisplayName().equals("wlan0")) {
     List<InetAddress> addresses = Collections.list(iface
       .getInetAddresses());
     for (InetAddress address : addresses) {
      if (address instanceof Inet4Address) {
       networkIp = address.getHostAddress();
      }
     }
    }
   }
  } catch (SocketException e) {
   e.printStackTrace();
  }

return networkIp;
}