java怎么获取服务器的IP地址 获取本机与服务器IP地址的方法

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

public class LocalIP {
    public static void main(String[] args) {
        try {
            InetAddress localHost = InetAddress.getLocalHost();
            System.out.println("本机IP地址: " + localHost.getHostAddress());
            System.out.println("本机主机名: " + localHost.getHostName());
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }
}

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

public class RealLocalIP {
    public static void main(String[] args) {
        try {
            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
            while (interfaces.hasMoreElements()) {
                NetworkInterface ni = interfaces.nextElement();
                if (ni.isLoopback() || !ni.isUp()) continue; // 跳过回环和未启用的接口

                Enumeration<InetAddress> addresses = ni.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    InetAddress addr = addresses.nextElement();
                    if (!addr.isLoopbackAddress() && addr instanceof java.net.Inet4Address) {
                        System.out.println("真实IP地址: " + addr.getHostAddress());
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }
}

import java.net.InetAddress;

public class ServerIP {
    public static void main(String[] args) {
        try {
            InetAddress address = InetAddress.getByName("www.baidu.com");
            System.out.println("百度服务器IP: " + address.getHostAddress());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

String clientIP = request.getHeader("X-Forwarded-For");
if (clientIP == null || clientIP.isEmpty()) {
    clientIP = request.getRemoteAddr();
}