Java获取本地IP地址和主机名

时间:2022-05-06 13:39:38

方式一:通过java.net.InetAddress类获取

public void test1() {
    try {
        InetAddress addr = InetAddress.getLocalHost();
        System.out.println("IP地址:" + addr.getHostAddress() + ",主机名:" + addr.getHostName());
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
}

输出:

IP地址:192.168.153.1,主机名:DESKTOP-338UP3E

这种方式获取到的主机名没啥问题,这种方式获取的主机名没啥问题,但获取到的IP地址却有待考量,如果一台机器有多个网卡,他获取的IP是谁的呢?事实上,上面输出的IP是我虚拟机IP地址,既不是我有线网卡的地址,也不是我无线网卡的地址。

 

方式二:利用java.net.NetworkInterface获取

public void test2() {
    try {
        Enumeration<NetworkInterface> faces = NetworkInterface.getNetworkInterfaces();
        while (faces.hasMoreElements()) { // 遍历网络接口
            NetworkInterface face = faces.nextElement();
            if (face.isLoopback() || face.isVirtual() || !face.isUp()) {
                continue;
            }
            System.out.print("网络接口名:" + face.getDisplayName() + ",地址:");
            Enumeration<InetAddress> address = face.getInetAddresses();
            while (address.hasMoreElements()) { // 遍历网络地址
                InetAddress addr = address.nextElement();
                if (!addr.isLoopbackAddress() && addr.isSiteLocalAddress() && !addr.isAnyLocalAddress()) {
                    System.out.print(addr.getHostAddress() + " ");
                }
            }
            System.out.println("");
        }
    } catch (SocketException e) {
        e.printStackTrace();
    }
}

输出:

网络接口名:VMware Virtual Ethernet Adapter for VMnet8,地址:192.168.153.1 
网络接口名:TAP-Windows Adapter V9,地址:10.8.0.30 
网络接口名:VMware Virtual Ethernet Adapter for VMnet1,地址:192.168.46.1 
网络接口名:Intel(R) Dual Band Wireless-AC 8265,地址:172.16.78.27 

疑问?:第一、三行为VM虚拟机网络地址,不知为何还在。