获取本机的ip地址（Windows+Lunix）

最新推荐文章于 2025-05-28 12:43:49 发布

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#java #ip

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本文介绍了一种在Java中获取本机IP地址的正确方法，通过遍历所有网络接口和IP地址，筛选出非回环且为站点本地地址的最佳实践。


1.源码：
package com.jindian.spingbootecharts.controller;

import org.springframework.stereotype.Controller;

import java.net.*;
import java.util.Enumeration;

/**
 * @author tank
 * @Description:
 * @create 2019-04-11 9:33
 **/
@Controller
public class TestController {

    //获取本机的IP地址
    public static void main(String[] args) {
        //address1();
        try {
            final InetAddress localHostLANAddress = getLocalHostLANAddress();
            System.out.println("localHostLANAddress="+localHostLANAddress.getHostAddress());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //方式一：只能在Windows下使用
    public static void address(){
        try {
            final InetAddress localHost = InetAddress.getLocalHost();
            // final String hostAddress = InetAddress.getLocalHost().getHostAddress();
            System.out.println("本机地址为："+localHost);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }

    //方式二:windows下会产生多个值（不准确）
    public static void address1()  {
        try{
        Enumeration allNetInterfaces = NetworkInterface.getNetworkInterfaces();
        InetAddress ip = null;
        while (allNetInterfaces.hasMoreElements())
        {
            NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
            System.out.println(netInterface.getName());
            Enumeration addresses = netInterface.getInetAddresses();
            while (addresses.hasMoreElements())
            {
                ip = (InetAddress) addresses.nextElement();
                if (ip != null && ip instanceof Inet4Address)
                {
                    System.out.println("本机的IP = " + ip.getHostAddress());
                }
            }
        }
    } catch (SocketException e) {
        e.printStackTrace();
    }

    }

    //正确方法
    public static InetAddress getLocalHostLANAddress()  {
        try {
            InetAddress candidateAddress = null;
            // 遍历所有的网络接口
            for (Enumeration ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements(); ) {
                NetworkInterface iface = (NetworkInterface) ifaces.nextElement();
                // 在所有的接口下再遍历IP
                for (Enumeration inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements(); ) {
                    InetAddress inetAddr = (InetAddress) inetAddrs.nextElement();
                    if (!inetAddr.isLoopbackAddress()) {// 排除loopback类型地址
                        if (inetAddr.isSiteLocalAddress()) {
                            // 如果是site-local地址，就是它了
                            return inetAddr;
                        } else if (candidateAddress == null) {
                            // site-local类型的地址未被发现，先记录候选地址
                            candidateAddress = inetAddr;
                        }
                    }
                }
            }
            if (candidateAddress != null) {
                return candidateAddress;
            }
            // 如果没有发现 non-loopback地址.只能用最次选的方案
            InetAddress jdkSuppliedAddress = InetAddress.getLocalHost();
            return jdkSuppliedAddress;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


}



2.本地的ip地址：