使用runtime.getruntime.exec从Java调用python脚本 [英] Calling python script from Java using runtime.getruntime.exec

问题描述

我有一个java web开发项目，想要调用python脚本在后台运行，然后继续使用java。

I have a java web development project, and want to call a python script to run in the background and then carry on with the java.

String command = "cmd.exe /c cd "C:\\path\\to\\py\\" && python script.py";
Process p = Runtime.getRuntime().exec(command);

当我调用它时似乎没有发生任何事情，但我需要在脚本访问文件时首先更改目录在其目录中。

Nothing seems to happen when i call this, but i need to change directory first as the script accesses files in its directory.

感谢您的帮助

编辑：

正确的答案是添加开始，这是我编辑的代码

Correct answer was adding start, this is my edited code

String command = "cmd.exe /c cd "C:\\path\\to\\py\\" && start python script.py";
Process p = Runtime.getRuntime().exec(command);

推荐答案

您是否配置了环境以支持可执行python脚本？

如果没有，你应该这样调用：

Did you configure your environment to support "executable" python scripts?
If not, you should call it like this:

String command = "cmd.exe /c start python path\to\script\script.py";
Process p = Runtime.getRuntime().exec(command);

start 命令运行相应的可执行文件（在这种情况下，python解释器），提供其参数（在本例中为脚本本身）。

The start command runs the appropriate executable (in this case python interpreter), with its supplied arguments (in this case the script itself).

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