/**

      * @param args

      */

     public static void main(String[] args) throws Exception {

         InetAddress ia = InetAddress.getLocalHost();

         System.out.println(ia);

         //获取网卡，获取地址

         byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();

         System.out.println("mac数组长度："+mac.length);

         StringBuffer sb = new StringBuffer("");

         for(int i=0; i<mac.length; i++) {

             if(i!=0) {

                 sb.append("-");

             }

             //字节转换为整数

             int temp = mac[i]&0xff;

             String str = Integer.toHexString(temp);

             System.out.println("每8位:"+str);

             if(str.length()==1) {

                 sb.append("0"+str);

             }else {

                 sb.append(str);

             }

         }

         System.out.println("本机MAC地址:"+sb.toString().toUpperCase());

     }