注意，只有插网线的网卡才支持网络唤醒，wifi是无法远程开机的，
被唤醒的计算机需要在同一局域网中，通过UDP广播的方式发送魔法包；
蓝屏或死机属于非正常关机状态，不支持远程开机；
在设备管理器中找到 网卡设备，右键选择「属性」，然后在「电源管理」里面开启「允许此设备唤醒计算机」，然后在「高级」一栏里找到「关机网络唤醒」、「魔术封包唤醒」里设置成「开启」
网络唤醒（Wake On Lan）是一种计算机局域网唤醒技术，使局域网内处于关机或休眠状态的计算机，将状态转换成引导（Boot Loader）或运行状态.。用通俗的语言解释，就是你的电脑通电着但没开机，可以用其他电脑通过网络来唤醒(开机)你的电脑，以此实现【远程开关机】的操作。
目前的电脑硬件【主板】都自带有集成网卡，大多数集成网卡都能实现网络唤醒功能，除了【集成网卡】这个硬件条件，还需要到电脑的【BIOS】以及Windows系统中进行一些设置，即可实现远程开、关电脑的需求。
前提条件
主板支持（现在的主板基本都支持，所以基本不用担心），很旧的主板好像是2000年左右的，还是需要插网卡(PCI2.1标准)需要3针WOL线连接主板；
关机时候为主板通电（600mA以上电流）,把电源切断是不行的，网卡带电才可以；
非正常关机可能会唤醒失败，所以里如果断电导致关机的话可能需要手工开启机器；
被唤醒的电脑必须连接网络，或者路由器，并且有一台手机或者电脑可以发送唤醒包；
WakeonlanService.java
package com.imddy.wakeonlan.service;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Service;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;@Servicepublic class WakeonlanService {
private static final Logger log = LoggerFactory.getLogger(WakeonlanService.class);
/**
* Sends a "magic packet" to the specified MAC address.
*
* @param macAddress The MAC address of the target machine in the format xx:xx:xx:xx:xx:xx.
* @param ipBroadcastAddress The broadcast IP address of the target machine's network.
* @throws IOException If there is an error sending the packet.
*/
public static void sendMagicPacket(String macAddress, String ipBroadcastAddress) throws IOException {
byte[] macBytes = parseMacAddress(macAddress);
byte[] data = createMagicPacket(macBytes);
DatagramPacket packet = new DatagramPacket(data, data.length, InetAddress.getByName(ipBroadcastAddress), 9);
try (DatagramSocket socket = new DatagramSocket()) {
socket.send(packet);
}
}
private static byte[] parseMacAddress(String macAddress) {
String[] octets = macAddress.split(":");
byte[] bytes = new byte[6];
for (int i = 0; i < octets.length; i++) {
bytes[i] = (byte) Integer.parseInt(octets[i], 16);
}
return bytes;
}
private static byte[] createMagicPacket(byte[] macBytes) {
byte[] data = new byte[102];
// Fill the first 6 bytes with 0xFF
for (int i = 0; i < 6; i++) {
data[i] = (byte) 0xff;
}
// Repeat the MAC address 16 times
for (int i = 6, j = 0; i < data.length; i++, j++) {
if (j == macBytes.length) j = 0;
data[i] = macBytes[j];
}
return data;
}
public static void main(String[] args) {
try {
sendMagicPacket("00:11:22:33:44:55", "192.168.1.255");
System.out.println("Magic packet sent.");
log.info("Magic packet sent.");
} catch (IOException e) {
e.printStackTrace();
}
}}1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.42.43.44.45.46.47.48.49.50.51.52.53.54.55.56.57.58.59.60.61.62.63.64.65.66.67.68.69.Application.java
package com.imddy.wakeonlan;import com.imddy.wakeonlan.cache.AppCacheMap;import com.imddy.wakeonlan.service.WakeonlanService;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.ApplicationArguments;import org.springframework.boot.ApplicationRunner;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import java.util.Iterator;import java.util.Set;@SpringBootApplicationpublic class Application implements ApplicationRunner {
private static final Logger log = LoggerFactory.getLogger(Application.class);
@Autowired
private WakeonlanService wakeonlanService;
public static void main(String[] args) {
log.info("Application start");
SpringApplication.run(Application.class, args);
log.info("Application end");
}
@Override
public void run(ApplicationArguments args) throws Exception {
log.info("wakeonlan启动run完成...");
/** 默认参数 */
String ip = "";
String mac = "";
/** 有帮助与否显示帮助 */
Set<String> argsSet = args.getOptionNames();
if (argsSet.isEmpty() || argsSet.contains("help")) {
printHelp();
System.exit(1);
}
/** 参数赋值 */
if (!argsSet.isEmpty()) {
for (Iterator iterator = argsSet.iterator(); iterator.hasNext(); ) {
String arg = (String) iterator.next();
if (arg.equalsIgnoreCase("ip")) {
if (args.getOptionValues("ip").size() > 0) {
ip = args.getOptionValues("ip").get(0);
} else {
System.out.println("ip参数异常！");
printHelp();
System.exit(1);
}
}
if (arg.equalsIgnoreCase("mac")) {
if (args.getOptionValues("mac").size() > 0) {
mac = args.getOptionValues("mac").get(0);
} else {
System.out.println("mac参数异常！");
printHelp();
System.exit(1);
}
}
}
}
log.info("ip:" + ip);
log.info("mac:" + mac);
mac = mac.replaceAll("-", ":").toString();
log.info("ip:" + ip);
log.info("mac:" + mac);
AppCacheMap.put("ip", ip);
AppCacheMap.put("mac", mac);
wakeonlanService.sendMagicPacket(mac, ip);
}
public void printHelp() {
System.out.println("--help 显示帮助");
System.out.println("--ip=192.168.106.22 录入IP");
System.out.println("--mac=74:56:3C:88:FA:CE 录入MAC");
}}1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.42.43.44.45.46.47.48.49.50.51.52.53.54.55.56.57.58.59.60.61.62.63.64.65.66.67.68.69.70.71.72.73.74.75.76.77.78.79.80.81.82.83.84.85.86.87.88.89.90.91.92.93.94.95.96.97.98.99.100.101.102.103.
