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我可以在java中运行一个bat文件，我也可以让它向java发送信息。

运行下面的 bat 文件的代码。我想我可以使用输入流以某种方式取得进展。我也在想也许我可以把东西留在 bat 文件中让它读取以获取状态。

我希望有人能给我一些关于如何添加基本进度条的代码。我从 oracle 阅读了演示和示例，但它们没有涵盖从 bat 文件中获取进度。

我在下面更新了我的代码，我仍然需要运行它并获取真正 100% 完成的行数。但是，它并没有像我想象的那样显示进展。它运行并保持在 0%，我可以说它仍在运行，因为任务管理器。

public class ProgressBar extends JPanel
                          implements ActionListener, 
                                     PropertyChangeListener {

private JProgressBar progressBar;
private JButton startButton;
private JTextArea taskOutput;
private Task task;

class Task extends SwingWorker<Void, Void> {
    /*
     * Main task. Executed in background thread.
     */
    @Override
    public Void doInBackground() {
        Random random = new Random();
        int progress = 0;
        //Initialize progress property.
        setProgress(0);
        //Sleep for at least one second to simulate "startup".
        try {
            Thread.sleep(1000 + random.nextInt(2000));
        } catch (InterruptedException ignore) {}
       // while (progress < 100) {
            //Sleep for up to one second.
            try {
                Thread.sleep(random.nextInt(1000));
            } catch (InterruptedException ignore) {}
            //Make random progress.
            try { 
                String ls_str;   
                Process ls_proc = Runtime.getRuntime().exec("\\WMIRebuild.bat"); 
            //     get its output (your input) stream    
                DataInputStream ls_in = new DataInputStream( 
                    ls_proc.getInputStream()); 
                try { 
                while ((ls_str = ls_in.readLine()) != null) { 
                    System.out.println(ls_str);
                    progress++;
                    } 
                } catch (IOException e) {
                System.exit(0); 
                } 
            } catch (IOException e1) { 
                System.err.println(e1); 
                System.exit(1); 
            }
            setProgress(Math.min(progress, 100));
       // }
        return null;
    }

    /*
     * Executed in event dispatch thread
     */
    public void done() {
        Toolkit.getDefaultToolkit().beep();
        startButton.setEnabled(true);
        taskOutput.append("Done!\n");
    }
}

public ProgressBar() {
    super(new BorderLayout());

    //Create the demo's UI.
    startButton = new JButton("Start");
    startButton.setActionCommand("start");
    startButton.addActionListener(this);

    progressBar = new JProgressBar(0, 18);
    progressBar.setValue(0);

    //Call setStringPainted now so that the progress bar height
    //stays the same whether or not the string is shown.
    progressBar.setStringPainted(true); 

    taskOutput = new JTextArea(5, 20);
    taskOutput.setMargin(new Insets(5,5,5,5));
    taskOutput.setEditable(false);

    JPanel panel = new JPanel();
    panel.add(startButton);
    panel.add(progressBar);

    add(panel, BorderLayout.PAGE_START);
    add(new JScrollPane(taskOutput), BorderLayout.CENTER);
    setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}

/**
 * Invoked when the user presses the start button.
 */
public void actionPerformed(ActionEvent evt) {
    progressBar.setIndeterminate(true);
    startButton.setEnabled(false);
    //Instances of javax.swing.SwingWorker are not reusuable, so
    //we create new instances as needed.
    task = new Task();
    task.addPropertyChangeListener(this);
    task.execute();
}

/**
 * Invoked when task's progress property changes.
 */
public void propertyChange(PropertyChangeEvent evt) {
    if ("progress" == evt.getPropertyName()) {
        int progress = (Integer) evt.getNewValue();
        progressBar.setIndeterminate(false);
        progressBar.setValue(progress);
        taskOutput.append(String.format(
                    "Completed %d%% of task.\n", progress));
    }
}

/**
 * Create the GUI and show it. As with all GUI code, this must run
 * on the event-dispatching thread.
 */
private static void createAndShowGUI() {
    //Create and set up the window.
    JFrame frame = new JFrame("ProgressBarDemo2");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    JComponent newContentPane = new ProgressBar();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

    //Display the window.
    frame.pack();
    frame.setVisible(true);
}

public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            createAndShowGUI();
        }
    });
}

}

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1 回答 1

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将进度条的框架与您的main()方法分开。让它在自己的线程上运行。当您从批处理文件中读取内容时ls_in.readLine()，请更新另一帧中的进度。例如，您可以在框架中调用一个方法，该方法addTick()将另一个块添加到进度条，每次从批处理文件中读取一行时都可以调用该方法。

非常基本的例子：

从进程中读取的线程：

    while ((ls_str = ls_in.readLine()) != null) { 
        System.out.println(ls_str);
        progressBar.addTick();
    }

进度条，在自己的线程上运行：

    String bar = "#";

    public void addTick()
    {
        if(bar.length() < maxBarLength) {
            bar = bar + "#";
            drawBar(bar);
        }
    }

    public void draw()
    {
        drawBar(bar);
    }

    public void paint()
    {
        // draw some stuff
        draw(bar);
    }

我不知道，类似的东西。显然，进度条将与此不同，这只是伪代码，让您了解 main() 方法如何与进度条交互。

于 2012-08-30T23:39:40.063 回答