java - Runtime.getRuntime 未能同时但稍后获得输出

Question

我目前正在使用 Java 制作 Firefox 插件开发 GUI 工具。但是，当我尝试获取 .bat 的输出时，我陷入了困境。文件。

当我运行.bat时file using java 我可以看到输出，但是bat文件中写入了3条命令。当第一个命令执行时，我可以同时获得输出。但是当它执行第二个命令时，输出没有出现。当 .bat文件存在我得到了所有不同时出现的输出。

执行时我立即得到输出:

call "C:\mozilla-build\addon-sdk-1.16\bin\activate.bat

但是我没有同时获得以下命令的输出:

call cfx run

但我知道它正在执行，因为 Firefox 窗口弹出了。当我执行 proc.destroy(); 时，我突然得到所有输出

这是我的bat文件:

@echo off
call  %1
cd C:\Users\Madhawa.se\Desktop\workingfox\beauty
call cfx run
pause  

这是我的 Java 代码:

Thread t = new Thread(new Runnable() {

    @Override
    public void run() {
        try {
            Runtime rt = Runtime.getRuntime();

            String[] commands = {"C:\\Users\\Madhawa.se\\Desktop\\workingfox\\runner\\foxrun.bat", "C:\\mozilla-build\\addon-sdk-1.16\\bin\\activate.bat"};

            proc = rt.exec(commands);

            BufferedReader stdInput = new BufferedReader(new InputStreamReader(proc.getInputStream()));

            BufferedReader stdError = new BufferedReader(new InputStreamReader(proc.getErrorStream()));

            // read the output from the command

            String s = null;
            while ((s = stdInput.readLine()) != null) {
                System.out.println(s);
            }

            // read any errors from the attempted command
            while ((s = stdError.readLine()) != null) {
                System.out.println(s);
            }
            proc.waitFor();
            System.out.println("success");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
});
t.start();

如何立即获取输出以及为什么该命令的行为不同？

Answer 1

我能够使用process builder而不是runtime.exec修复它。并且inheriteIo不起作用。它阻止了实时输出

Thread t = new Thread(new Runnable() {
    private String s;

    @Override
    public void run() {
        try {

            Component selectedComponent = jTabbedPane2.getSelectedComponent();
            if (selectedComponent instanceof MyTextArea) {
                String response = "";
                System.out.println("yes");
                MyTextArea temptextarea = (MyTextArea) selectedComponent;
                String xpiPath = new File(temptextarea.getNameX()).getParentFile().getPath();

                String[] commands = {"C:\\Users\\Madhawa.se\\Desktop\\workingfox\\runner\\foxrun.bat", "C:\\mozilla-build\\addon-sdk-1.16\\bin\\activate.bat

                ProcessBuilder process = new ProcessBuilder(commands);
                process.redirectErrorStream(true);

                Process shell = process.start();

                //shell.waitFor();
                BufferedReader stdInput = new BufferedReader(new InputStreamReader(shell.getInputStream()));
                BufferedReader stdError = new BufferedReader(new InputStreamReader(shell.getErrorStream()));

                // read the output from the command
                System.out.println("Here is the standard output of the command:\n");
                while ((s = stdInput.readLine()) != null) {
                    System.out.println("s:" + s);
                }

                // read any errors from the attempted command
                System.out.println("Here is the standard error of the command (if any):\n");
                while ((s = stdError.readLine()) != null) {
                    System.out.println("w:" + s);
                }
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        }