Android与iOS设备MAC地址生成原理及Java实现详解

import java.util.Random;

public class BasicMacGenerator {
    public static String generateMac() {
        Random rand = new Random();
        byte[] macBytes = new byte[6];
        rand.nextBytes(macBytes);
        
        // 设置为本地管理+单播 (02:XX:XX:XX:XX:XX)
        macBytes[0] = (byte)((macBytes[0] & 0xFE) | 0x02);
        
        // 格式化为XX:XX:XX:XX:XX:XX
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < macBytes.length; i++) {
            sb.append(String.format("%02X", macBytes[i]));
            if (i < macBytes.length - 1) sb.append(":");
        }
        return sb.toString();
    }

    public static void main(String[] args) {
        System.out.println("Random MAC: " + generateMac());
    }
}

public class PlatformMacGenerator {
    private static final Random random = new Random();

    // Android: 本地管理+单播 (02:XX:XX:XX:XX:XX)
    public static String generateAndroidMac() {
        byte[] mac = new byte[6];
        random.nextBytes(mac);
        mac[0] = (byte)((mac[0] & 0xFE) | 0x02);
        return formatMac(mac);
    }

    // iOS: 格式相同，但行为随机化
    public static String generateIosMac() {
        byte[] mac = new byte[6];
        random.nextBytes(mac);
        mac[0] = (byte)((mac[0] & 0xFE) | 0x02);
        return formatMac(mac);
    }

    private static String formatMac(byte[] mac) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < mac.length; i++) {
            sb.append(String.format("%02X", mac[i]));
            if (i < mac.length - 1) sb.append(":");
        }
        return sb.toString();
    }

    public static void main(String[] args) {
        System.out.println("Android MAC: " + generateAndroidMac());
        System.out.println("iOS MAC: " + generateIosMac());
    }
}