java 獲取mac地址

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import java.util.HashMap;

public class MacUtils {

    private static String getLocalMac() {

        InetAddress ia = null;
        StringBuffer sb = new StringBuffer("");

        try {

            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();

            while (interfaces.hasMoreElements()) {
                NetworkInterface networkInterface = interfaces.nextElement();
                if (networkInterface != null) {

                    String name = networkInterface.getName();

                    if(!name.equals("en0")){                        continue;                    }                    byte[] bytes = networkInterface.getHardwareAddress();                    if (bytes != null) {                        for (int i = 0; i < bytes.length; i++) {                            if (i != 0) {                                sb.append(":");                            }                            int tmp = bytes[i] & 0xff; // 字節轉換爲整數                            String str = Integer.toHexString(tmp);                            if (str.length() == 1) {                                sb.append("0" + str);                            } else {                                sb.append(str);                            }                        }                    }                }            }            System.out.println("本機MAC地址:" + sb.toString().toLowerCase());        } catch (Exception e) {            e.printStackTrace();        }        return sb.toString().toLowerCase();    }    public static void main(String[] args) {        getLocalMac();    }}