（转）jdk1.6上取得mac地址

（转）jdk1.6下取得mac地址
转自老紫竹

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.NetworkInterface;
import java.util.Enumeration;


/**
* JDK6新特性,JAVA获得机器MAC地址的方法
*
* @author 老紫竹(Java世纪网,java2000.net)
*/
public class Test {
  // 返回一个字节的十六进制字符串
  static String hexByte(byte b) {
     String s = "000000" + Integer.toHexString(b);
    return s.substring(s.length() - 2);
   }


  public static void main(String[] args) throws Exception {
     System.out.println("本机器的所有的网卡MAC发下:");
     getMacOnWindow();
     getMac();
   }


  /**
    * JDK1.6新特性获取网卡MAC地址
    */
  public static void getMac() {
    try {
       Enumeration<NetworkInterface> el = NetworkInterface.getNetworkInterfaces();
      while (el.hasMoreElements()) {
        byte[] mac = el.nextElement().getHardwareAddress();
        if (mac == null)
          continue;


         StringBuilder builder = new StringBuilder();
        for (byte b : mac) {
           builder.append(hexByte(b));
           builder.append("-");
         }
         builder.deleteCharAt(builder.length() - 1);
         System.out.println(builder);


       }
     } catch (Exception exception) {
       exception.printStackTrace();
     }
   }


  /**
    * 原始的获取网卡MAC地址
    */
  public static void getMacOnWindow() {
    try {
       String mac = null;
       Process process = Runtime.getRuntime().exec("ipconfig /all");
       BufferedReader buffer = new BufferedReader(new InputStreamReader(process.getInputStream()));
      for (String line = buffer.readLine(); line != null; line = buffer.readLine()) {
        int index = line.indexOf("Physical Address");
        if (index <= 0) {
          continue;
         }
         mac = line.substring(index + 36);
        break;
       }
       buffer.close();
       process.waitFor();
       System.out.println(mac);
     } catch (Exception exception) {
       exception.printStackTrace();
     }
   }
}