Java获取本地MAC地址 （注意有的时候那个地址是英文或者中文的形式）

package org.jivesoftware;

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

import org.junit.Test;

public class GetMACAddress {
	
	private String mac;
	
	/**   
     *  获取当前操作系统名称.   
     *  return 操作系统名称 例如:windows,Linux,Unix等.   
    */     
   public static String getOSName() {     
       return System.getProperty("os.name").toLowerCase();     
   }     
            
   /**   
     * 获取Unix网卡的mac地址.   
    * @return mac地址   
    */     
   public static String getUnixMACAddress() {     
       String mac = null;     
       BufferedReader bufferedReader = null;     
       Process process = null;     
       try {     
             /**  
              *  Unix下的命令，一般取eth0作为本地主网卡 显示信息中包含有mac地址信息    
              */  
           process = Runtime.getRuntime().exec("ifconfig eth0");   
           bufferedReader = new BufferedReader(new InputStreamReader(process     
                   .getInputStream()));     
           String line = null;     
           int index = -1;     
           while ((line = bufferedReader.readLine()) != null) {     
                  /**  
                   *  寻找标示字符串[hwaddr]   
                   */  
               index = line.toLowerCase().indexOf("hwaddr");    
                  /**  
                   * 找到了  
                   */  
               if (index != -1) {     
                      /**  
                       *   取出mac地址并去除2边空格    
                       */  
                   mac = line.substring(index +"hwaddr".length()+ 1).trim();   
                   break;     
               }     
           }     
       } catch (IOException e) {     
           e.printStackTrace();     
       } finally {     
           try {     
               if (bufferedReader != null) {     
                   bufferedReader.close();     
               }     
           } catch (IOException e1) {     
              e1.printStackTrace();     
          }     
           bufferedReader = null;     
           process = null;     
       }     
    
       return mac;     
   }     
        
          
          
       /**   
         * 获取Linux网卡的mac地址.   
        * @return mac地址   
        */     
       public static String getLinuxMACAddress() {     
           String mac = null;     
           BufferedReader bufferedReader = null;     
           Process process = null;     
           try {     
                 /**  
                  *  linux下的命令，一般取eth0作为本地主网卡 显示信息中包含有mac地址信息    
                  */  
               process = Runtime.getRuntime().exec("ifconfig eth0");   
               bufferedReader = new BufferedReader(new InputStreamReader(process     
                       .getInputStream()));     
               String line = null;     
               int index = -1;     
               while ((line = bufferedReader.readLine()) != null) {     
                   index = line.toLowerCase().indexOf("硬件地址");    
                      /**  
                       * 找到了  
                       */  
                   if (index != -1) {     
                          /**  
                           *   取出mac地址并去除2边空格    
                           */  
                       mac = line.substring(index+4).trim();   
                       break;     
                   }     
               }     
           } catch (IOException e) {     
               e.printStackTrace();     
           } finally {     
               try {     
                   if (bufferedReader != null) {     
                       bufferedReader.close();     
                   }     
               } catch (IOException e1) {     
                  e1.printStackTrace();     
              }     
               bufferedReader = null;     
               process = null;     
           }   
        
           return mac;     
       }   
          
       /**   
        * 获取widnows网卡的mac地址.   
        * @return mac地址   
        */     
       public static String getWindowsMACAddress() {     
           String mac = null;     
           BufferedReader bufferedReader = null;     
           Process process = null;     
           try {     
                 /**  
                  * windows下的命令，显示信息中包含有mac地址信息    
                  */  
               process = Runtime.getRuntime().exec("ipconfig /all");   
               bufferedReader = new BufferedReader(new InputStreamReader(process     
                       .getInputStream()));     
               String line = null;     
               int index_zh = -1;     
               int index_en = -1;
               while ((line = bufferedReader.readLine()) != null) {     
                      /**  
                       *  寻找标示字符串[physical address]  或  [物理地址] 是中文还是英文会因为操作系统不同而改变
                       */  
                   index_zh = line.toLowerCase().indexOf("物理地址");    
                   index_en = line.toLowerCase().indexOf("physical address");
                   
                   if (index_zh != -1) {   
                	   index_zh = line.indexOf(":");   
                       if (index_zh != -1) {   
                              /**  
                               *   取出mac地址并去除2边空格  
                               */  
                          mac = line.substring(index_zh + 1).trim();    
                      }   
                       break;     
                   }else if(index_en !=-1){
                	   index_en = line.indexOf(":");   
                       if (index_en != -1) {   
                              /**  
                               *   取出mac地址并去除2边空格  
                               */  
                          mac = line.substring(index_en + 1).trim();    
                      }   
                       break;   
                   }
               }   
           } catch (IOException e) {     
               e.printStackTrace();     
           }finally {     
               try {     
                   if (bufferedReader != null) {     
                       bufferedReader.close();     
                     }     
               }catch (IOException e1) {     
                   e1.printStackTrace();     
                 }     
               bufferedReader = null;     
               process = null;     
           }     
        
           return mac;     
       }     
        
       /**   
        * 测试用的main方法.   
        *    
        * @param argc   
       *            运行参数.   
        */  
       public static String getMACAddress() {     
           String os = getOSName();     
           System.out.println(os); 
           String mac=null;
           if(os.startsWith("windows")){     
                mac = getWindowsMACAddress();     
               System.out.println("本地是windows:"+mac);     
           }else if(os.startsWith("linux")){     
                mac = getLinuxMACAddress();     
               System.out.println("本地是Linux系统,MAC地址是:"+mac);   
           }else{     
                mac = getUnixMACAddress();                         
               System.out.println("本地是Unix系统 MAC地址是:"+mac);   
           }   
           return mac;
       }     

}