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
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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
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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:
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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(); } } } |