获得网卡地址

public static String getMACAddress(){

String address = "";

String os = System.getProperty("os.name");

String osUser=System.getProperty("user.name");

if (os != null && os.startsWith("Windows")) {
  try {
    String command = "cmd.exe /c ipconfig /all";
    Process p = Runtime.getRuntime().exec(command);
    BufferedReader br =new BufferedReader(new InputStreamReader(p.getInputStream()));
    String line;
    while ((line = br.readLine()) != null) {
    if (line.indexOf("Physical Address") > 0) {
      int index = line.indexOf(":");
      indx += 2;
      address = line.substring(index);
      break;
    }
  }
  br.close();
  return address.trim();
  }
  catch (IOException e) {
  }
  }
  return address;
}