WOL 唤醒内网设备

package net.liukai.tool;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class WakeOnLanTest {

    public static void wakeUp(String macAddress) {
        try {
            byte[] macBytes = getMacBytes(macAddress);
            byte[] magicPacket = new byte[102];
            // 添加6个FF字节
            for (int i = 0; i < 6; i++) {
                magicPacket[i] = (byte) 0xff;
            }
            // 添加16次MAC地址
            for (int i = 6; i < magicPacket.length; i += 6) {
                System.arraycopy(macBytes, 0, magicPacket, i, 6);
            }
            // 创建用于发送UDP数据报的Socket
            DatagramSocket socket = new DatagramSocket();
            // 发送数据报到目标主机的255.255.255.255端口
            DatagramPacket packet = new DatagramPacket(magicPacket, magicPacket.length, InetAddress.getByName("255.255.255.255"), 9);
            socket.send(packet);
            // 关闭Socket
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static byte[] getMacBytes(String macAddress) throws IllegalArgumentException {
        String[] hex = macAddress.split("(\\:|\\-)");
        if (hex.length != 6) {
            throw new IllegalArgumentException("Invalid MAC address.");
        }
        byte[] bytes = new byte[6];
        try {
            for (int i = 0; i < 6; i++) {
                bytes[i] = (byte) Integer.parseInt(hex[i], 16);
            }
        } catch (NumberFormatException e) {
            throw new IllegalArgumentException("Invalid hex digit in MAC address.");
        }
        return bytes;
    }

    public static void main(String[] args) {
        String macAddress = "11:22:33:44:55:66"; // 替换为目标设备的MAC地址
        wakeUp(macAddress);
    }
}