1、新建一个专门用来得到电脑的MAC地址对象类，然后对其进行调用

MacAddress.java

import java.io.*;
import java.util.*;
import java.util.regex.*;

public class MacAddress {

    private static final String[] windowsCommand = {"ipconfig", "/all"};
    private static final String[] linuxCommand = {"/sbin/ifconfig", "-a"};
    private static final Pattern macPattern = Pattern.compile(".*((:?[0-9a-f]{2}[-:]){5}[0-9a-f]{2}).*", Pattern.CASE_INSENSITIVE);

    private static List<String> getMacAddressList() throws IOException {
        ArrayList<String> macAddressList = new ArrayList<String>();
        final String os = System.getProperty("os.name");
        final String[] command;
        if (os.startsWith("Windows")) {
            command = windowsCommand;
        } else if (os.startsWith("Linux")) {
            command = linuxCommand;
        } else {
            throw new IOException("Unknown operating system: " + os);
        }
        final Process process = Runtime.getRuntime().exec(command);
        // Discard the stderr
        new Thread() {

            @Override
            public void run() {
                try {
                    InputStream errorStream = process.getErrorStream();
                    while (errorStream.read() != -1) {
                    }
                    errorStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }.start();
        // Extract the MAC addresses from stdout
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        for (String line = null; (line = reader.readLine()) != null;) {
            Matcher matcher = macPattern.matcher(line);
            if (matcher.matches()) {
                //macAddressList.add(matcher.group(1));
                macAddressList.add(matcher.group(1).replaceAll("[-:]", ""));
            }
        }
        reader.close();
        return macAddressList;
    }

    public static String getMacAddress() {
        try {
            List<String> addressList = getMacAddressList();
            if (addressList.isEmpty()) {
                return "";
            }
            return addressList.get(0);
        } catch (IOException e) {
        	e.printStackTrace();
            return "";
        }
    }

    public static String[] getMacAddresses() {
        try {
            return getMacAddressList().toArray(new String[0]);
        } catch (IOException e) {
        	e.printStackTrace();
            return new String[0];
        }
    }
}

?2、建一个主类对其进行调用

import java.io.IOException;

public class test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
					MacAddress mac = new MacAddress();
					System.out.println("本电脑的MAC地址为："+mac.getMacAddress());
	}

	 
}

?

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