Java获取本机mac地址

下面的两种方法都能获取本机的mac地址，但是第二种方法需要使用jdk1.6。

 

package cn.lifx.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

public class MacAddressTest
{
	public static void main(String[] args)
	{
		String address = "";
		String host = "*.*.*.*";
		
		MacAddressTest test = new MacAddressTest();
		
		address = test.getMacAddress();
		System.out.println("Physical Address is : " + address);
		
		address = test.getMacAddress(host);
		System.out.println("Physical Address is : " + address);
	}
	
	public String getMacAddress()
	{
		String mac = "";  
		String line = "";
        
        String os = System.getProperty("os.name");  
        
        if (os != null && os.startsWith("Windows")) 
        {   
            try 
            {   
                String command = "cmd.exe /c ipconfig /all";   
                Process p = Runtime.getRuntime().exec(command);   
                
                BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));   
                
                while((line = br.readLine()) != null)
                {   
                    if (line.indexOf("Physical Address") > 0)
                    {   
                        int index = line.indexOf(":") + 2;
                        
                        mac = line.substring(index);
                        
                        break;   
                    }   
                }   
                
                br.close();   
                
            } catch (IOException e) {}   
        }   
        
        return mac;   
	}
	
	public String getMacAddress(String host)
	{
		String mac = "";
		StringBuffer sb = new StringBuffer();
		
		try 
		{
			NetworkInterface ni = NetworkInterface.getByInetAddress(InetAddress.getByName(host));
			
			byte[] macs = ni.getHardwareAddress();
			
			for(int i=0; i<macs.length; i++)
			{
				mac = Integer.toHexString(macs[i] & 0xFF); 
				
			     if (mac.length() == 1) 
			     { 
			    	 mac = '0' + mac; 
			     } 

				sb.append(mac + "-");
			}
						
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		
		mac = sb.toString();
		mac = mac.substring(0, mac.length()-1);
		
		return mac;
	}
}

 

评论

4 楼 shengtu 2013-08-05  

楼主好， & 0xFF是为了什么呢？

3 楼 suene 2012-12-21  

	public static List<String> getAllMacAddresses()
	{
		List<String> addresses = new ArrayList<String>();

		StringBuffer sb = new StringBuffer();
		try
		{
			Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
			while(networkInterfaces.hasMoreElements())
			{
				NetworkInterface netInterface = networkInterfaces.nextElement();
				byte[] mac = netInterface.getHardwareAddress();
				if(mac != null && mac.length != 0)
				{
					sb.delete(0, sb.length());
					for(byte b : mac)
					{
						String hexString = Integer.toHexString(b & 0xFF);
						sb.append((hexString.length() == 1) ? "0" + hexString : hexString);
					}
					addresses.add(sb.toString());
				}
			}
		}
		catch(SocketException e)
		{
			e.printStackTrace();
		}

		return addresses;
	}

2 楼 生于菇乡 2010-04-21  

恩，刚看懂，谢谢楼主！！！

1 楼 生于菇乡 2010-04-21  

没看懂，当还是谢谢楼主分享