[英]How to stop command line process in Java
I have a program that allows a user to press a button, and then it runs a command line statement that the user is able to see the output of. 我有一个程序,该程序允许用户按下按钮,然后运行一个命令行语句,用户可以看到其输出。
I now want to know if it's possible to stop the command before it finishes. 我现在想知道是否有可能在命令完成之前停止该命令。 I know of the command "ctrl+c" when running command prompt normally, however, I'm not sure how you would implement this in a java program. 我在正常运行命令提示符时知道命令“ ctrl + c”,但是,我不确定如何在Java程序中实现此命令。
runButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent r) {
JFrame runFrame = new JFrame("Running process...");
runFrame.setSize(500, 400);
runFrame.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
runFrame.setLayout(null);
JButton somethingButton = new JButton("Stop");
JButton closeButton = new JButton("Close");
somethingButton.setBounds(65, 290, 105, 25);
closeButton.setBounds(335, 290, 105, 25);
JTextArea run = new JTextArea();
JScrollPane runSP = new JScrollPane(run);
runSP.setBounds(65, 50, 375, 200);
run.setLineWrap(true);
run.setWrapStyleWord(true);
run.setEditable(false);
runFrame.add(runSP);
runFrame.add(somethingButton);
runFrame.add(closeButton);
runFrame.setVisible(true);
//Start of creating of command line stuff
Runtime runtime = Runtime.getRuntime();
Process process = null;
try {
process = runtime.exec("ping riot.de");
} catch (IOException e1) {
System.err.print("Error: " + e1);
e1.printStackTrace();
}
try {
StringBuilder sb = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = br.readLine()) != null) {
sb.append(line);
sb.append("\n");
}
run.setText(sb.toString());
} catch (IOException e) {
System.err.println("Error: " + e);
}
closeButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent c) {
runFrame.dispose();
}
});
somethingButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent c) {
//CODE TO STOP HERE
}
});
}
});
尝试使用提到的代码来取消进程process.destroy();
;。
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