在Java中模拟按键，以将用户输入内容写入另一个应用程序 [英] Simulate keypress in java to write user inputs to another application

问题描述

我正在开发一个虚拟键盘应用程序.一切工作正常，只不过我写的内容只写到当前应用程序中，而不是写在后面.

I am developing a virtual keyboard application. Everything works fine except that what ever i write is written into the present application only not the one that is running behind.

我之所以这样，是因为Java中的ROBOT类仅适用于创建它的应用程序上下文.

I fell this is because ROBOT class in java only works for the application context that creates it.

有没有解决的办法?

这是代码，我试图在我的Java应用程序后面的终端中写 ls :

Here is the code, i am trying to write ls in the terminal that is behind my java application:

        Robot robot = new Robot();

        robot.keyPress(KeyEvent.VK_ALT);
        robot.keyPress(KeyEvent.VK_TAB);
        robot.keyRelease(KeyEvent.VK_TAB);
        robot.keyRelease(KeyEvent.VK_ALT);

        robot.keyPress('l');
        robot.keyRelease('l');
        robot.keyPress('s');
        robot.keyRelease('s');

        robot.keyPress(KeyEvent.VK_ENTER);
        robot.keyRelease(KeyEvent.VK_ENTER);

推荐答案

从

judging from this example, the Robot class is able to send keystrokes to external applications - but they will arrive at the topmost window so you basically need to focus the window to which you want to have your keystrokes sent, there seems to be a variety of solutions for this, im guessing this one is the easiest :

https://stackoverflow.com/a/4782350/351861 :

或者，您可以编写一个VBScript来激活另一个 应用.例如:

Alternatively, you can write a VBScript to activate another application. For example:

Set WshShell = WScript.CreateObject("WScript.Shell") 
WshShell.AppActivate("Firefox")

然后使用Java应用程序中的Runtime.exec执行脚本.

Then use Runtime.exec from your Java app to execute the script.

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