根据IP地址获取用户的MAC地址 </div>

 

[Java]代码    

/**    * 根据IP地址获取mac地址    * @param ipAddress 127.0.0.1    * @return    * @throws SocketException    * @throws UnknownHostException    */   public static String getLocalMac(String ipAddress) throws SocketException,     UnknownHostException {    // TODO Auto-generated method stub    String str = "";    String macAddress = "";    final String LOOPBACK_ADDRESS = "127.0.0.1";    // 如果为127.0.0.1,则获取本地MAC地址。    if (LOOPBACK_ADDRESS.equals(ipAddress)) {     InetAddress inetAddress = InetAddress.getLocalHost();     // 貌似此方法需要JDK1.6。     byte[] mac = NetworkInterface.getByInetAddress(inetAddress)       .getHardwareAddress();     // 下面代码是把mac地址拼装成String     StringBuilder sb = new StringBuilder();     for (int i = 0; i < mac.length; i++) {      if (i != 0) {       sb.append("-");      }      // mac[i] & 0xFF 是为了把byte转化为正整数      String s = Integer.toHexString(mac[i] & 0xFF);      sb.append(s.length() == 1 ? 0 + s : s);     }     // 把字符串所有小写字母改为大写成为正规的mac地址并返回     macAddress = sb.toString().trim().toUpperCase();     return macAddress;    } else {     // 获取非本地IP的MAC地址     try {      System.out.println(ipAddress);      Process p = Runtime.getRuntime()        .exec("nbtstat -A " + ipAddress);      System.out.println("===process=="+p);      InputStreamReader ir = new InputStreamReader(p.getInputStream());            BufferedReader br = new BufferedReader(ir);           while ((str = br.readLine()) != null) {       if(str.indexOf("MAC")>1){        macAddress = str.substring(str.indexOf("MAC")+9, str.length());        macAddress = macAddress.trim();        System.out.println("macAddress:" + macAddress);        break;       }      }      p.destroy();      br.close();      ir.close();     } catch (IOException ex) {     }     return macAddress;    }   }