java 获取MAC地址

获取MAC地址：

package com;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;

public class Test {

/**
* @param args
* @throws IOException 
*/
public static void main(String[] args) throws IOException {
   // TODO Auto-generated method stub
   Properties pp = System.getProperties(); //获取系统的所有属性
   pp.list(System.out);//打印所有的属性
   String command = "cmd.exe /c ipconfig/all ";
   Process p = Runtime.getRuntime().exec(command);//执行DOS程序
  
   System.out.println(p);
   BufferedReader br = new BufferedReader(new InputStreamReader(p
     .getInputStream()));
   String line;
   String address = "";
   while ((line = br.readLine()) != null) {
    System.out.println(line);
    if (line.indexOf("Physical Address") > 0) {//如果有Physical Address字符串
     int index = line.indexOf(":");
     index += 2;
     address = line.substring(index);
     break;
    }
   }
   br.close();

   System.out.println(address);
  
}

}