从 Java 执行命令并等待命令完成
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原文地址: http://stackoverflow.com/questions/6444812/
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Executing a Command from Java and Waiting for the Command to Finish
提问by Matt R. Johnson
In my Java program, I create a process that executes a command to run a batch file like this:
在我的 Java 程序中，我创建了一个进程，该进程执行一个命令来运行这样的批处理文件：
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);
}
Now, what I would like to have happen is that the command
现在，我希望发生的是命令
refreshActionPerformed(evt);
runs only after the batch file I called has finished executing. But right now, it runs immediately after the Command Prompt opens.
仅在我调用的批处理文件执行完毕后运行。但是现在，它会在命令提示符打开后立即运行。
How do I fix this?
我该如何解决？
采纳答案by Matt R. Johnson
I manged to find the answer elsewhere. To keep the initial process open until the batch file finished all you need is "/wait"
我设法在别处找到了答案。要保持初始进程打开直到批处理文件完成，您只需要“/wait”
Process p = Runtime.getRuntime().exec("cmd /C start /wait filepath.bat");
int exitVal = p.waitFor();
回答by Triton Man
calling "cmd /c start" causes cmd to fire off another instance and exit immediately. Try taking out the "start" command.
调用“cmd /c start”会导致 cmd 触发另一个实例并立即退出。尝试取出“开始”命令。
回答by Pedro Arnoldo Machado Duran
The answer given is correct. I added that the window opened by the code needs to be closed manually.
给出的答案是正确的。我补充说代码打开的窗口需要手动关闭。
Process p = Runtime.getRuntime().exec("cmd /C start /wait filepath.bat");
int exitVal = p.waitFor();
