通过Java获取默认网络接口

import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class DefaultNetworkInterfaceExample {
    public static void main(String[] args) {
        try {
            Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
            while (networkInterfaces.hasMoreElements()) {
                NetworkInterface networkInterface = networkInterfaces.nextElement();
                if (networkInterface.isUp() && !networkInterface.isLoopback()) {
                    System.out.println("Default Network Interface: " + networkInterface.getName());
                    System.out.println("IP Addresses: ");
                    Enumeration<java.net.InetAddress> inetAddresses = networkInterface.getInetAddresses();
                    while (inetAddresses.hasMoreElements()) {
                        java.net.InetAddress inetAddress = inetAddresses.nextElement();
                        System.out.println("- " + inetAddress.getHostAddress());
                    }
                    break;
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }
}