Python 官方文档:入门教程 => 点击学习
目录前言一、规则二、获取1.使用2.工具类前言 在Java中如何准确的获取到本机IP地址呢?网上大部分的做法是InetAddress.getLocalHost().getHostAd
在Java中如何准确的获取到本机IP地址呢?网上大部分的做法是InetAddress.getLocalHost().getHostAddress()
。这的确能获取到本机IP地址,但是是不准确的。因为忽略了一个问题,网络环境是多变的,一台计算机不同的网卡有多个IP地址,Lan、WiFi、蓝牙、热点、虚拟机网卡等。
public static void main(String[] args) throws SocketException {
System.out.println( IpUtil.getLocalIp4Address().get().toString().replaceAll("/",""));
}
package com.dingwen.test.utils;
import org.springframework.util.ObjectUtils;
import java.net.*;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Optional;
public class IpUtil {
public static List<Inet4Address> getLocalIp4AddressFromNetworkInterface() throws SocketException {
List<Inet4Address> addresses = new ArrayList<>(1);
// 所有网络接口信息
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
if (ObjectUtils.isEmpty(networkInterfaces)) {
return addresses;
}
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
//滤回环网卡、点对点网卡、非活动网卡、虚拟网卡并要求网卡名字是eth或ens开头
if (!isValidInterface(networkInterface)) {
continue;
}
// 所有网络接口的IP地址信息
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
InetAddress inetAddress = inetAddresses.nextElement();
// 判断是否是IPv4,并且内网地址并过滤回环地址.
if (isValidAddress(inetAddress)) {
addresses.add((Inet4Address) inetAddress);
}
}
}
return addresses;
}
private static boolean isValidInterface(NetworkInterface ni) throws SocketException {
return !ni.isLoopback() && !ni.isPointToPoint() && ni.isUp() && !ni.isVirtual()
&& (ni.getName().startsWith("eth") || ni.getName().startsWith("ens"));
}
private static boolean isValidAddress(InetAddress address) {
return address instanceof Inet4Address && address.isSiteLocalAddress() && !address.isLoopbackAddress();
}
private static Optional<Inet4Address> getIpBySocket() throws SocketException {
try (final DatagramSocket socket = new DatagramSocket()) {
socket.connect(InetAddress.getByName("8.8.8.8"), 10002);
if (socket.getLocalAddress() instanceof Inet4Address) {
return Optional.of((Inet4Address) socket.getLocalAddress());
}
} catch (UnknownHostException networkInterfaces) {
throw new RuntimeException(networkInterfaces);
}
return Optional.empty();
}
public static Optional<Inet4Address> getLocalIp4Address() throws SocketException {
final List<Inet4Address> inet4Addresses = getLocalIp4AddressFromNetworkInterface();
if (inet4Addresses.size() != 1) {
final Optional<Inet4Address> ipBySocketOpt = getIpBySocket();
if (ipBySocketOpt.isPresent()) {
return ipBySocketOpt;
} else {
return inet4Addresses.isEmpty() ? Optional.empty() : Optional.of(inet4Addresses.get(0));
}
}
return Optional.of(inet4Addresses.get(0));
}
}
参考:
https://www.jianshu.com/p/f619663f0f0a
Https://www.cnblogs.com/starcrm/p/7071227.html
下面在分享一段Java获取本机IP地址的示例代码
import java.net.*;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
public class IpUtil {
public static List<Inet4Address> getLocalIp4AddressFromNetworkInterface() throws SocketException {
List<Inet4Address> addresses = new ArrayList<>(1);
// 所有网络接口信息
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
if (Objects.isNull(networkInterfaces)) {
return addresses;
}
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
//滤回环网卡、点对点网卡、非活动网卡、虚拟网卡并要求网卡名字是eth或ens开头
if (!isValidInterface(networkInterface)) {
continue;
}
// 所有网络接口的IP地址信息
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
InetAddress inetAddress = inetAddresses.nextElement();
// 判断是否是IPv4,并且内网地址并过滤回环地址.
if (isValidAddress(inetAddress)) {
addresses.add((Inet4Address) inetAddress);
}
}
}
return addresses;
}
private static boolean isValidInterface(NetworkInterface ni) throws SocketException {
return !ni.isLoopback() && !ni.isPointToPoint() && ni.isUp() && !ni.isVirtual()
&& (ni.getName().startsWith("eth") || ni.getName().startsWith("ens"));
}
private static boolean isValidAddress(InetAddress address) {
return address instanceof Inet4Address && address.isSiteLocalAddress() && !address.isLoopbackAddress();
}
private static Optional<Inet4Address> getIpBySocket() throws SocketException {
try (final DatagramSocket socket = new DatagramSocket()) {
socket.connect(InetAddress.getByName("8.8.8.8"), 10002);
if (socket.getLocalAddress() instanceof Inet4Address) {
return Optional.of((Inet4Address) socket.getLocalAddress());
}
} catch (UnknownHostException networkInterfaces) {
throw new RuntimeException(networkInterfaces);
}
return Optional.empty();
}
public static Optional<Inet4Address> getLocalIp4Address() throws SocketException {
final List<Inet4Address> inet4Addresses = getLocalIp4AddressFromNetworkInterface();
if (inet4Addresses.size() != 1) {
final Optional<Inet4Address> ipBySocketOpt = getIpBySocket();
if (ipBySocketOpt.isPresent()) {
return ipBySocketOpt;
} else {
return inet4Addresses.isEmpty() ? Optional.empty() : Optional.of(inet4Addresses.get(0));
}
}
return Optional.of(inet4Addresses.get(0));
}
}
到此这篇关于Java 获取本机IP地址的文章就介绍到这了,更多相关Java 获取本机IP地址内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!
--结束END--
本文标题: Java 获取本机IP地址的实例代码
本文链接: https://www.lsjlt.com/news/147797.html(转载时请注明来源链接)
有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341
下载Word文档到电脑,方便收藏和打印~
2024-03-01
2024-03-01
2024-03-01
2024-02-29
2024-02-29
2024-02-29
2024-02-29
2024-02-29
2024-02-29
2024-02-29
回答
回答
回答
回答
回答
回答
回答
回答
回答
回答
0