Java awt.Robot : CTRL+ALT+DEL does not bring up desired screen

Question

我最近才发现 awt.Robot 库，我很高兴能够使用它。我想我可以对我的 friend 开个恶作剧，让机器人按下 control、alt、delete 按下锁定计算机按钮，但我无法让程序调出控制 alt 删除屏幕。

这是我的代码:

import java.awt.*;
import java.awt.event.KeyEvent;
public class Bot {
public static void main(String[] args)
{
    try {
        Robot bot = new Robot();
        bot.delay(4000);
        bot.keyPress(KeyEvent.VK_CONTROL);
        bot.delay(100);
        bot.keyPress(KeyEvent.VK_ALT);
        bot.delay(100);
        bot.keyPress(KeyEvent.VK_DELETE);
        bot.delay(500);
        bot.keyRelease(KeyEvent.VK_CONTROL);
        bot.keyRelease(KeyEvent.VK_ALT);
        bot.keyRelease(KeyEvent.VK_DELETE);
    } catch (AWTException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

public static void pressEnter(Robot bot)
{
    bot.keyPress(KeyEvent.VK_ENTER);
    bot.delay(40);
    bot.keyRelease(KeyEvent.VK_ENTER);
}
}

Answer 1

这不能在 Windows XP¹(+ 补丁？)中使用模拟按键事件来完成。

来自comment here在一篇显示如何使用进行模拟的旧文章上:

For secure reasons on Vista we can not broadcast hotkey message to simulate CTRL ALT DEL. To do this on VISTA you need to use a special library "SASLIB" not provided by default...

无论如何，如果您直接使用 Win32(或任何操作系统)API，您可能可以访问适当的 API 来执行任务。例如，参见 LockWorkStation :

This function has the same result as pressing Ctrl+Alt+Del and clicking Lock Workstation.

参见 Is there a Java library to access the native Windows API?有关如何访问 native (Windows) API 的线索。

---

¹ 根据操作的描述，我假设目标是 Windows。