win.hupubao.common.utils.MacUtils Maven / Gradle / Ivy

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package win.hupubao.common.utils;

import java.net.InetAddress;
import java.net.NetworkInterface;

public class MacUtils {

    public static String getLocalMac() {
        InetAddress ia;
        byte[] mac = null;
        try {
            //获取本地IP对象
            ia = InetAddress.getLocalHost();
            //获得网络接口对象（即网卡），并得到mac地址，mac地址存在于一个byte数组中。
            mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < mac.length; i++) {
            if (i != 0) {
                sb.append("-");
            }
            //mac[i] & 0xFF 是为了把byte转化为正整数
            String s = Integer.toHexString(mac[i] & 0xFF);
            sb.append(s.length() == 1 ? 0 + s : s);
        }

        return sb.toString().toUpperCase();
    }

    public static void main(String[] args) {
        System.out.println(getLocalMac());
    }
}