获取Java中的系统MAC地址

我需要获取运行该程序的系统的MAC地址。但我无法做到这一点。获取Java中的系统MAC地址

我写下面的代码：

public class App{ 

     public static void main(String[] args){ 

     InetAddress ip; 
     try { 

      ip = InetAddress.getLocalHost(); 
      System.out.println("Current IP address : " + ip.getHostAddress()); 

      NetworkInterface network = NetworkInterface.getByInetAddress(ip); 

      byte[] mac = network.getHardwareAddress(); 

      System.out.print("Current MAC address : "); 

      StringBuilder sb = new StringBuilder(); 
      for (int i = 0; i < mac.length; i++) { 
       sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));   
      } 
      System.out.println(sb.toString()); 

     } catch (UnknownHostException e) { 

      e.printStackTrace(); 

     } catch (SocketException e){ 

      e.printStackTrace(); 

     } 

     } 

    }

而且我得到以下结果：

Current IP address : 14.96.192.202 
Current MAC address :

我没有得到的MAC地址是空白。

我看到here

来源

2013-05-08 Veer Shrivastav

它在输出中显示NULL。 – 2013-05-08 19:57:57

Windows还是Linux？可能需要确保程序以管理员身份运行？ – 2013-05-08 20:01:36

我正在使用Windows – 2013-05-08 20:11:54

这个例子如果你占了多个接口，以及一些空的MAC地址（我在Windows 7上运行的Java 7中安装了VMware（所以我有一些虚拟网络适配器）），那么该代码似乎工作：

public static void main(String[] args) { 
    try { 
    InetAddress ip = InetAddress.getLocalHost(); 
    System.out.println("Current IP address : " + ip.getHostAddress()); 

    Enumeration<NetworkInterface> networks = NetworkInterface.getNetworkInterfaces(); 
    while(networks.hasMoreElements()) { 
     NetworkInterface network = networks.nextElement(); 
     byte[] mac = network.getHardwareAddress(); 

     if(mac != null) { 
     System.out.print("Current MAC address : "); 

     StringBuilder sb = new StringBuilder(); 
     for (int i = 0; i < mac.length; i++) { 
      sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : "")); 
     } 
     System.out.println(sb.toString()); 
     } 
    } 
    } catch (UnknownHostException e) { 
    e.printStackTrace(); 
    } catch (SocketException e){ 
    e.printStackTrace(); 
    } 
}

这里是（一消毒的版本），我看到我的电脑上，当我运行它：

Current IP address : {I'm not telling :)} 
Current MAC address : 
Current MAC address : {actual hardware interface} 
Current MAC address : 00-00-00-00-00-00-00-E0 
Current MAC address : 00-00-00-00-00-00-00-E0 
Current MAC address : 00-00-00-00-00-00-00-E0 
Current MAC address : 00-00-00-00-00-00-00-E0 
Current MAC address : 00-00-00-00-00-00-00-E0 
Current MAC address : 00-50-56-C0-00-01 
Current MAC address : 00-50-56-C0-00-08

这里是运行ipconfig /all

C:\>ipconfig /all 

Windows IP Configuration (minus any actual interface because I don't like sharing that kind of information :) 

Ethernet adapter Local Area Connection 2: 

    Media State . . . . . . . . . . . : Media disconnected 
    Connection-specific DNS Suffix . : 
    Description . . . . . . . . . . . : Gbridge Virtual Private Network Adapter 
    Physical Address. . . . . . . . . : 02-50-F2-CE-82-01 
    DHCP Enabled. . . . . . . . . . . : Yes 
    Autoconfiguration Enabled . . . . : Yes 

Ethernet adapter VMware Network Adapter VMnet1: 

    Connection-specific DNS Suffix . : 
    Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet1 
    Physical Address. . . . . . . . . : 00-50-56-C0-00-01 
    DHCP Enabled. . . . . . . . . . . : No 
    Autoconfiguration Enabled . . . . : Yes 
    Link-local IPv6 Address . . . . . : fe80::9c27:3d03:da2c:f14d%19(Preferred) 
    Autoconfiguration IPv4 Address. . : {Hidden}(Preferred) 
    Subnet Mask . . . . . . . . . . . : 255.255.0.0 
    Default Gateway . . . . . . . . . : 
    DHCPv6 IAID . . . . . . . . . . . : 268456022 
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-DB-D9-CB-B8-AC-6F-AF-9D-F2 
    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1 
             fec0:0:0:ffff::2%1 
             fec0:0:0:ffff::3%1 
    NetBIOS over Tcpip. . . . . . . . : Enabled 

Ethernet adapter VMware Network Adapter VMnet8: 

    Connection-specific DNS Suffix . : 
    Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet8 
    Physical Address. . . . . . . . . : 00-50-56-C0-00-08 
    DHCP Enabled. . . . . . . . . . . : No 
    Autoconfiguration Enabled . . . . : Yes 
    Link-local IPv6 Address . . . . . : fe80::cdbb:434:7fd9:2574%20(Preferred) 
    IPv4 Address. . . . . . . . . . . : 192.168.42.1(Preferred) 
    Subnet Mask . . . . . . . . . . . : 255.255.255.0 
    Default Gateway . . . . . . . . . : 
    DHCPv6 IAID . . . . . . . . . . . : 285233238 
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-13-DB-D9-CB-B8-AC-6F-AF-9D-F2 
    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1 
             fec0:0:0:ffff::2%1 
             fec0:0:0:ffff::3%1 
    NetBIOS over Tcpip. . . . . . . . : Enabled 

Tunnel adapter 6TO4 Adapter: 

    Description . . . . . . . . . . . : Microsoft 6to4 Adapter 
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 
    DHCP Enabled. . . . . . . . . . . : No 
    Autoconfiguration Enabled . . . . : Yes 
    IPv6 Address. . . . . . . . . . . : 2002:204c:1bc6::204c:1bc6(Preferred) 
    Default Gateway . . . . . . . . . : 
    NetBIOS over Tcpip. . . . . . . . : Disabled 

Tunnel adapter isatap.{3E45CB42-BC1E-4F89-9C16-25166C0EABA1}: 

    Media State . . . . . . . . . . . : Media disconnected 
    Connection-specific DNS Suffix . : 
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter 
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 
    DHCP Enabled. . . . . . . . . . . : No 
    Autoconfiguration Enabled . . . . : Yes 

Tunnel adapter isatap.{77F1FADC-02BA-44AF-9FDF-97E23F8B5FE7}: 

    Media State . . . . . . . . . . . : Media disconnected 
    Connection-specific DNS Suffix . : 
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3 
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 
    DHCP Enabled. . . . . . . . . . . : No 
    Autoconfiguration Enabled . . . . : Yes 

Tunnel adapter isatap.{608257AC-C0F3-43A5-8595-898533C95D90}: 

    Media State . . . . . . . . . . . : Media disconnected 
    Connection-specific DNS Suffix . : 
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #5 
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0 
    DHCP Enabled. . . . . . . . . . . : No 
    Autoconfiguration Enabled . . . . : Yes

所面临的挑战，从这个烂摊子让“只是一个值”的输出来自InetAddress.getLocalHost().getHostAddress()和网络接口本身之间的关系。考虑初始程序的这种轻微的扩展版本（使用这真的很酷IterableEnumeration实用类）：

public static void main(String[] args) throws UnknownHostException, SocketException { 
    System.out.println("Current IP address : " + InetAddress.getLocalHost().getHostAddress()); 

    for(NetworkInterface network : IterableEnumeration.make(NetworkInterface.getNetworkInterfaces())) { 
    byte[] mac = network.getHardwareAddress(); 
    if(mac != null) { 
     System.out.print("Current MAC address : "); 
     StringBuilder sb = new StringBuilder(); 
     for (int i = 0; i < mac.length; i++) { 
     sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : "")); 
     } 
     System.out.println(sb.toString()); 
     //Bound InetAddress for interface 
     for(InetAddress address : IterableEnumeration.make(network.getInetAddresses())) { 
     System.out.println("\tBound to:"+address.getHostAddress()); 
     } 
    } 
    } 
}

如果您的计算机上运行此，你会看到你当前的IP地址关联到一个适配器，但该MAC地址的硬件接口将它看作是一个不同的IP地址。也许你可以过滤掉虚拟地址，或者找到一种利用所有可用地址的方法。

来源

2013-05-08 20:13:27

它返回一组值。但我只需要一个值为我的程序。那么我将如何取得一个价值。那太适当了。 – 2013-05-08 20:24:46

我刺伤了我的答案。 – 2013-05-08 20:42:23

获取Java中的系统MAC地址

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