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 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 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 list = new ArrayList<>();
  Enumeration enumeration = NetworkInterface.getNetworkInterfaces();
  while (enumeration.hasMoreElements()) {
   NetworkInterface intf = enumeration.nextElement();
   if (intf.isLoopback() || intf.isVirtual()) { //
    continue;
   }
   Enumeration 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();
  }
 }
}

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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