JAVA得到網卡物理地址(Windows和Linux)

/*   * Test.java   *   * Created on 2007-9-27, 9:11:15   *   * To change this template, choose Tools | Templates   * and open the template in the editor.   */      package test2;      import java.io.BufferedReader;   import java.io.IOException;   import java.io.InputStreamReader;   import java.util.Properties;   import java.util.logging.Level;   import java.util.logging.Logger;      /**   *   * @author hadeslee   */   public class Test {      public static String getMACAddress() {      String address = "";   String os = System.getProperty("os.name");   System.out.println(os);   if (os != null) {   if (os.startsWith("Windows")) {   try {   ProcessBuilder pb = new ProcessBuilder("ipconfig", "/all");   Process p = pb.start();   BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));   String line;   while ((line = br.readLine()) != null) {   if (line.indexOf("Physical Address") != -1) {   int index = line.indexOf(":");   address = line.substring(index   1);   break;   }   }   br.close();   return address.trim();   } catch (IOException e) {      }   }else if(os.startsWith("Linux")){   try {   ProcessBuilder pb = new ProcessBuilder("ifconfig");   Process p = pb.start();   BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));   String line;   while((line=br.readLine())!=null){   int index=line.indexOf("硬體地址");   if(index!=-1){   address=line.substring(index 4);   break;   }   }   br.close();   return address.trim();   } catch (IOException ex) {   Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);   }      }   }   return address;   }      public static void main(String[] args) {   System.out.println(""   Test.getMACAddress());   }   }