9

我需要获取运行程序的系统的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();

        }

       }

    }

我得到以下结果：

 Current IP address : 14.96.192.202
 Current MAC address :

我没有得到 MAC 地址，它是空白的。

我从这里看到了这个例子

4

1 回答 1

35

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）），那么这段代码似乎可以工作：

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();
  }
}

这是我在运行计算机时看到的（经过清理的版本）：

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

这是运行的输出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

从这种混乱中获得“只有一个值”的挑战来自InetAddress.getLocalHost().getHostAddress()网络接口本身之间的关系。考虑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());
      }
    }
  }
}

如果您在计算机上运行此程序，您将看到您当前的 IP 地址与一个适配器相关，但您的硬件接口的 MAC 地址将其自身视为不同的 IP 地址。也许您可以过滤掉虚拟地址，或者只是想办法利用所有可用地址。

于 2013-05-08T20:13:27.560 回答