jnetpcap-javadoc-14r1425-1zip用他的模块库给JAVA获取mac地址

以下是使用jnetpcap获取MAC地址的示例代码：

import org.jnetpcap.Pcap;
import org.jnetpcap.PcapIf;

import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Arrays;
import java.util.List;

public class Main {

    public static void main(String[] args) throws SocketException {
        List<PcapIf> interfaces = getInterfaces();
        System.out.println("Available interfaces:");
        for (int i = 0; i < interfaces.size(); i++) {
            PcapIf iface = interfaces.get(i);
            System.out.println((i+1) + ". " + iface.getName() + " (" + iface.getDescription() + ")");
        }

        PcapIf selectedIface = interfaces.get(0);
        System.out.println("Using interface: " + selectedIface.getName());

        byte[] macAddress = getMacAddress(selectedIface);
        System.out.println("MAC address: " + formatMacAddress(macAddress));
    }

    private static List<PcapIf> getInterfaces() {
        StringBuilder errorMsg = new StringBuilder();
        List<PcapIf> interfaces = Arrays.asList(new PcapIf[10]);
        int result = Pcap.findAllDevs(interfaces, errorMsg);
        if (result != Pcap.OK) {
            System.err.println("Error finding interfaces: " + errorMsg);
            System.exit(1);
        }
        return interfaces;
    }

    private static byte[] getMacAddress(PcapIf iface) {
        byte[] macAddress = new byte[6];
        try {
            NetworkInterface ni = NetworkInterface.getByInetAddress(iface.getAddresses().get(0).getAddr().getAddress());
            macAddress = ni.getHardwareAddress();
        } catch (Exception e) {
            System.err.println("Error getting MAC address: " + e.getMessage());
        }
        return macAddress;
    }

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

该代码使用了jnetpcap的Pcap和PcapIf类来获取系统中可用的网络接口列表，并允许用户选择一个接口。然后，它使用Java的NetworkInterface类来获取选择的接口的MAC地址。最后，它使用formatMacAddress方法将字节数组转换为格式化的MAC地址字符串。