如何通过swing GUI打开任何命令行程序并将命令传递给它？

我基本上想要使用Swing将命令行程序转换为gui程序。 一旦用户按下适当的按钮，GUI就应该将相应的命令传递给命令行程序。 如果我们可以在不显示命令行程序的情况下执行此操作，那么它将完全取代该程序。

我一直试图在互联网上搜索这两天，我只发现Runtime.getRuntime（）。exec（cmd）命令对打开命令提示符并打开命令行程序很有用，但是命令可以不再传递给提示，不能对该程序进行进一步的操作。 请帮忙。

Answer 1

我实际上会避免通过命令提示符并直接调用您的命令行程序。 您所要做的就是找到您的程序所在的位置。

需要考虑的一些事项：

• 您应该在EDT（事件调度线程）之外执行命令以避免GUI冻结（ SwingWorker会做得很好）
• 而是使用ProcessBuilder不是RuntimeExec

下面是一个调用命令java -version代码示例（这仅用于使用ProcessBuilder API的示例）：

 import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.io.InputStream; import java.io.StringWriter; import java.util.concurrent.ExecutionException; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.SwingUtilities; import javax.swing.SwingWorker; import javax.swing.UIManager; public class TestRuntimeExec { private JButton executeButton; protected void initUI() { final JFrame frame = new JFrame(); frame.setTitle(TestRuntimeExec.class.getSimpleName()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); executeButton = new JButton("Clik me to execute command"); executeButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { doWork(); } }); frame.add(executeButton, BorderLayout.SOUTH); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } protected void doWork() { SwingWorker worker = new SwingWorker() { @Override protected String doInBackground() throws Exception { ProcessBuilder builder = new ProcessBuilder(System.getProperty("java.home") + "/bin/java", "-version"); builder.redirectErrorStream(true); Process process = builder.start(); ConsoleReader consoleReader = new ConsoleReader(process.getInputStream()); consoleReader.start(); int waitFor = process.waitFor(); consoleReader.join(); switch (waitFor) { case 0: return consoleReader.getResult(); default: throw new RuntimeException("Failed to execute " + builder.command() + " \nReturned message: " + consoleReader.getResult()); } } @Override protected void done() { try { showCommandResult(get()); } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); showCommandError(e); } } }; worker.execute(); } protected void showCommandError(ExecutionException e) { JOptionPane.showMessageDialog(executeButton, e.getMessage(), "An error has occured", JOptionPane.ERROR_MESSAGE); } protected void showCommandResult(String commandResult) { JOptionPane.showMessageDialog(executeButton, commandResult); } public static void main(String[] args) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new TestRuntimeExec().initUI(); } }); } public static class ConsoleReader extends Thread { private InputStream is; private StringWriter sw; ConsoleReader(InputStream is) { this.is = is; sw = new StringWriter(); } @Override public void run() { try { int c; while ((c = is.read()) != -1) { sw.write(c); } } catch (IOException e) { ; } } String getResult() { return sw.toString(); } } }