基于Java实现获取本地IP地址和主机名

方式一:通过java.net.InetAddress类获取

public void test1() {

try {

InetAddress addr = InetAddress.getLocalHost();

System.out.println("IP地址:" + addr.getHostAddress() + ",主机名:" + addr.getHostName());

} catch (UnknownHostException e) {

e.printStackTrace();

}

}

输出:

IP地址:192.168.153.1,主机名:DESKTOP-338UP3E

这种方式获取到的主机名没啥问题,这种方式获取的主机名没啥问题,但获取到的IP地址却有待考量,如果一台机器有多个网卡,

他获取的IP是谁的呢?事实上,上面输出的IP是我虚拟机IP地址,既不是我有线网卡的地址,也不是我无线网卡的地址。

方式二:利用java.net.NetworkInterface获取

public void test2() {

try {

Enumeration<NetworkInterface> faces = NetworkInterface.getNetworkInterfaces();

while (faces.hasMoreElements()) { // 遍历网络接口

NetworkInterface face = faces.nextElement();

if (face.isLoopback() || face.isVirtual() || !face.isUp()) {

continue;

}

System.out.print("网络接口名:" + face.getDisplayName() + ",地址:");

Enumeration<InetAddress> address = face.getInetAddresses();

while (address.hasMoreElements()) { // 遍历网络地址

InetAddress addr = address.nextElement();

if (!addr.isLoopbackAddress() && addr.isSiteLocalAddress() && !addr.isAnyLocalAddress()) {

System.out.print(addr.getHostAddress() + " ");

}

}

System.out.println("");

}

} catch (SocketException e) {

e.printStackTrace();

}

}

输出:

网络接口名:VMware Virtual Ethernet Adapter for VMnet8,地址:192.168.153.1

网络接口名:TAP-Windows Adapter V9,地址:10.8.0.30

网络接口名:VMware Virtual Ethernet Adapter for VMnet1,地址:192.168.46.1

网络接口名:Intel(R) Dual Band Wireless-AC 8265,地址:172.16.78.27

疑问?:第一、三行为VM虚拟机网络地址,不知为何还在。

工具类:

import java.net.InetAddress;

import java.net.NetworkInterface;

import java.net.SocketException;

import java.net.UnknownHostException;

import java.util.ArrayList;

import java.util.Enumeration;

import java.util.List;

/**

* 本地主机工具类

*

* @author zhi

* @since 2019年11月13日09:04:36

*

*/

public class LocalHostUtil {

/**

* 获取主机名称

*

* @return

* @throws UnknownHostException

*/

public static String getHostName() throws UnknownHostException {

return InetAddress.getLocalHost().getHostName();

}

/**

* 获取系统首选IP

*

* @return

* @throws UnknownHostException

*/

public static String getLocalIP() throws UnknownHostException {

return InetAddress.getLocalHost().getHostAddress();

}

/**

* 获取所有网卡IP,排除回文地址、虚拟地址

*

* @return

* @throws SocketException

*/

public static String[] getLocalIPs() throws SocketException {

List<String> list = new ArrayList<>();

Enumeration<NetworkInterface> enumeration = NetworkInterface.getNetworkInterfaces();

while (enumeration.hasMoreElements()) {

NetworkInterface intf = enumeration.nextElement();

if (intf.isLoopback() || intf.isVirtual()) { //

continue;

}

Enumeration<InetAddress> inets = intf.getInetAddresses();

while (inets.hasMoreElements()) {

InetAddress addr = inets.nextElement();

if (addr.isLoopbackAddress() || !addr.isSiteLocalAddress() || addr.isAnyLocalAddress()) {

continue;

}

list.add(addr.getHostAddress());

}

}

return list.toArray(new String[0]);

}

/**

* 判断操作系统是否是Windows

*

* @return

*/

public static boolean isWindowsOS() {

boolean isWindowsOS = false;

String osName = System.getProperty("os.name");

if (osName.toLowerCase().indexOf("windows") > -1) {

isWindowsOS = true;

}

return isWindowsOS;

}

public static void main(String[] args) {

try {

System.out.println("主机是否为Windows系统:" + LocalHostUtil.isWindowsOS());

System.out.println("主机名称:" + LocalHostUtil.getHostName());

System.out.println("系统首选IP:" + LocalHostUtil.getLocalIP());

System.out.println("系统所有IP:" + String.join(",", LocalHostUtil.getLocalIPs()));

} catch (UnknownHostException e) {

} catch (Exception e) {

e.printStackTrace();

}

}

}

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