jnetpcap-javadoc-14r1425-1zip用他的模块库给JAVA获取mac地址方法要简洁

以下是使用jnetpcap获取MAC地址的简洁示例代码：

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

import java.util.List;

public class MacAddress {

    public static void main(String[] args) {
        List<PcapIf> devices = getNetworkDevices();
        if (devices == null) {
            System.out.println("No network devices found.");
            return;
        }

        for (PcapIf device : devices) {
            byte[] macAddress = getMacAddress(device);
            if (macAddress != null) {
                System.out.println(device.getName() + " MAC address: " + formatMacAddress(macAddress));
            }
        }
    }

    private static List<PcapIf> getNetworkDevices() {
        List<PcapIf> devices = new ArrayList<>();
        StringBuilder error = new StringBuilder();
        if (Pcap.findAllDevs(devices, error) == Pcap.NOT_OK || devices.isEmpty()) {
            System.err.println("Error while getting network devices: " + error);
            return null;
        }
        return devices;
    }

    private static byte[] getMacAddress(PcapIf device) {
        byte[] macAddress = new byte[6];
        try {
            byte[] address = device.getHardwareAddress();
            if (address != null) {
                System.arraycopy(address, 0, macAddress, 0, macAddress.length);
                return macAddress;
            }
        } catch (Exception e) {
            System.err.println("Error while getting MAC address of device " + device.getName() + ": " + e.getMessage());
        }
        return null;
    }

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

}

该示例代码首先获取所有网络设备，然后遍历每个设备并获取其MAC地址。获取MAC地址的方法是使用getHardwareAddress()函数，如果该函数返回非空值，则将其复制到一个字节数组中并返回。最后，该示例代码格式化MAC地址并将其打印到控制台上。

请注意，使用jnetpcap获取MAC地址需要在系统上安装WinPcap或Libpcap库。在Windows上，通常可以从WinPcap官方网站下载WinPcap安装程序。在Linux上，通常可以使用包管理器安装Libpcap库。