获取真实用户IP地址

import java.net.InetAddress;
import java.net.UnknownHostException;

public class GetLocalIPAddress {
    public static void main(String[] args) {
        try {
            InetAddress localHost = InetAddress.getLocalHost();
            String ipAddress = localHost.getHostAddress();
            System.out.println("本地机器的 IP 地址是：" + ipAddress);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }
}

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

public class GetRealIPAddress {
    public static void main(String[] args) {
        try {
            Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
            while (networkInterfaces.hasMoreElements()) {
                NetworkInterface networkInterface = networkInterfaces.nextElement();
                Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
                while (inetAddresses.hasMoreElements()) {
                    InetAddress inetAddress = inetAddresses.nextElement();
                    if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress() && inetAddress.isSiteLocalAddress()) {
                        String ipAddress = inetAddress.getHostAddress();
                        System.out.println("真实的 IP 地址是：" + ipAddress);
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }
}