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();
}
}
}