从Java执行命令，等待命令完成 [英] Executing a Command from Java and Waiting for the Command to Finish

问题描述

在我的Java程序中，我创建了执行命令来运行这样一个批处理文件的过程：

In my Java program, I create a process that executes a command to run a batch file like this:

try {
        File tempFile = new File("C:/Users/Public/temp.cmd");
        tempFile.createNewFile();
        tempFile.deleteOnExit();


        setContents(tempFile, recipe.getText()); //Writes some user input to file
        String cmd = "cmd /c start " + tempFile.getPath();


        Process p = Runtime.getRuntime().exec(cmd);


        int exitVal = p.waitFor();

        refreshActionPerformed(evt);

    } catch (InterruptedException ex) {
        Logger.getLogger(mainFrame.class.getName()).log(Level.SEVERE, null, ex); 
    } catch (IOException ex) {
        Logger.getLogger(mainFrame.class.getName()).log(Level.SEVERE, null, ex);
    } 

现在，我想有发生的事情是，命令

Now, what I would like to have happen is that the command

refreshActionPerformed(evt);

运行后，才称为批处理文件执行完毕。但是现在，它运行命令提示符打开之后。

runs only after the batch file I called has finished executing. But right now, it runs immediately after the Command Prompt opens.

我该如何解决这个问题？

How do I fix this?

推荐答案

我manged在别处找到了答案。为了保持最初的进程打开，直到该批处理文件完成了所有你需要的是/等待

I manged to find the answer elsewhere. To keep the initial process open until the batch file finished all you need is "/wait"

Process p = Runtime.getRuntime().exec("cmd /C start /wait filepath.bat");
int exitVal = p.waitFor();

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