MAC地址获取

前情提要

• 每台联网设备的MAC地址是唯一固定的，所以很多时候都会有获取AMC地址的需求
• MAC地址即使网卡的唯一标识

MAC获取代码

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

/**
 * Created by Administrator on 2018/5/30 0030.
 */
public class NetUtils {
    /**

     * @param args

     * @throws UnknownHostException

     * @throws SocketException

     */

    public static void main(String[] args) throws UnknownHostException, SocketException {
        //得到IP，输出SC-201707281232/192.168.1.20
        InetAddress ia = InetAddress.getLocalHost();
        System.out.println(ia);
        getLocalMac(ia);

    }

    private static void getLocalMac(InetAddress ia) throws SocketException {
        // TODO Auto-generated method stub
        //获取网卡，获取地址
        byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
        System.out.println("mac数组长度："+mac.length);
        StringBuffer sb = new StringBuffer("");
        for(int i=0; i<mac.length; i++) {
            if(i!=0) {
                sb.append(":");
            }
            //字节转换为整数
            int temp = mac[i]&0xff;
            String str = Integer.toHexString(temp);
            System.out.println("每8位:"+str);
            if(str.length()==1) {
                sb.append("0"+str);
            }else {
                sb.append(str);
            }
        }
        System.out.println("本机MAC地址:"+sb.toString().toUpperCase());
    }
}

测试输出

----------输出结果如下--------------

SC-201707281232/192.168.1.20
mac数组长度：6
每8位:1c
每8位:b7
每8位:2c
每8位:ef
每8位:ba
每8位:3d
本机MAC地址:1C-B7-2C-EF-BA-3D

Process finished with exit code 0

----------获取的值是没有问题的

---