Question

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。

我正在编写以下代码：

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();

        }

       }

    }

我得到了以下结果：

 Current IP address : 14.96.192.202
 Current MAC address :

我没有得到空白的MAC地址。

我在here

中看到了这个例子

Answer 1

如果您考虑多个接口和一些空MAC地址（我在安装了VMWare的Windows 7上运行Java 7（所以我有一些虚拟网络适配器）），那么这段代码似乎有效：

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();
  }
}

这是我在计算机上运行时看到的（消毒版本）：

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

这是运行ipconfig /all

的输出

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

从这个混乱中获取“只有一个价值”的挑战来自于InetAddress.getLocalHost().getHostAddress()与网络接口本身之间的关系。考虑一下这个初始程序的轻微扩展版本（使用这个非常酷的IterableEnumeration实用程序类）：

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());
      }
    }
  }
}

如果在计算机上运行此命令，您将看到当前的IP地址与一个适配器相关，但您的硬件接口的MAC地址将其视为另一个IP地址。也许您可以过滤掉虚拟地址或只是找到一种方法来利用所有可用的地址。

用Java获取系统的MAC地址

1 个答案: