超时后从 Java 锁定 Windows 桌面
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Lock windows desktop from Java after timeout
提问by Daisetsu
I want my java app to lock the windows desktop after a specific timeout. I have a timer which works fine, but I can't seem to execute the command to lock the workstation.
我希望我的 Java 应用程序在特定超时后锁定 Windows 桌面。我有一个可以正常工作的计时器，但我似乎无法执行锁定工作站的命令。
javax.swing.Timer tim = new javax.swing.Timer(1000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("CARD NOT PRESENT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
// LOCK SCREEN
Runtime rt = Runtime.getRuntime();
Process pr = rt.exec("%windir%/System32/rundll32.exe user32.dll,LockWorkStation");
}
});
Is there some mistake in this? Or maybe an easier way to do this?
这有什么错误吗？或者也许有更简单的方法来做到这一点？
回答by Roman Malieiev
Try absolute location:
尝试绝对位置：
Runtime.getRuntime().exec("C:\Windows\System32\rundll32.exe user32.dll,LockWorkStation");
回答by Steve S.
This is working as well (tested on Windows 7 x86):
这也有效（在 Windows 7 x86 上测试）：
final String path = System.getenv("windir") + File.separator + "System32" + File.separator + "rundll32.exe";
Process pr = rt.exec(path + " user32.dll,LockWorkStation");
回答by jayunit100
I think there is a better way to test this :
我认为有一个更好的方法来测试这个：
1) put the command in a .bat file.
1) 将命令放在 .bat 文件中。
2) Run the bat file. does it work ?
2）运行bat文件。它有效吗？
3) If so , call the .bat file in your code.
3) 如果是这样，请在您的代码中调用 .bat 文件。
4) Does it work ? If so, then you are done. I dont think there is any value in encoding windows specific code into runtime exec, just keep the bat file as a seperate file in your app .
4）它有效吗？如果是这样，那么你就完成了。我认为将特定于 Windows 的代码编码为运行时 exec 没有任何价值，只需将 bat 文件作为应用程序中的单独文件即可。
Runtime.exec sometimes fails because the paths arent the same inside the JVM as they are in the native os.
Runtime.exec 有时会失败，因为 JVM 中的路径与它们在本机操作系统中的路径不同。
