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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