以编程方式杀死Java中的进程

Question

I have a Swing application which get inputs through the text boxes and when Start button is Hit/clicked, we start a Ant script - programmatically (org.apache.tools.ant.Project, org.apache.tools.ant.ProjectHelper) (ant file properties come from input text boxes). This Ant script will start checking out code from CVS.

Now, I want to stop this Ant script execution when user hits Stop button.

Problem: As soon as user fills in text boxes and hits Start, I start the Ant script execution. So, the control moves from that Applet or Input page to back end java code. So I am not able to access "Stop" button in main applet.

Answer 1

我不确定，但是听起来您想要做的是使用线程执行后端Java代码，然后告诉该线程在用户按下stop时终止。

Answer 2

public class Kill 
{
    public static void main(String[] args) throws Exception 
    {
        ProcessBuilder p = new ProcessBuilder("notepad.exe","fake.xml");
        p.directory(new File("c:/temp/"));

        System.out.println("Starting ...");
        Process x = p.start();
        System.out.println("Started ...");
        System.out.println("Sleeping ...");
        Thread.sleep(3000);     
        System.out.println("Woke up ...");
        System.out.println("Destroying...");

        x.destroy();
        x.waitFor(); // If you don't wait for it then the application will be terminated as soon as it is started

        System.out.println("Return value = " + x.exitValue());
        System.out.println("Over ...");
    }
}

One way is to use x.waitFor(); method and keep waiting for either user action to kill the ant process or it may finishes by its own. Anyhow you will need the x.destroy(); and check for the success and failure using the x.exitValue() . But using this in a worker thread makes more sense as the UI will remain responsive.