java 获取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; // 字节转换为整数
                            String str = Integer.toHexString(tmp);
                            if (str.length() == 1) {
                                sb.append("0" + str);
                            } else {
                                sb.append(str);
                            }
                        }
                    }
                }
            }

            System.out.println("本机MAC地址:" + sb.toString().toLowerCase());


        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString().toLowerCase();

    }

    public static void main(String[] args) {

        getLocalMac();
    }

}