将项目导出为可运行的jar时无法调用外部Bash程序

Question

I have a java project that requires an external bash script to work. It works perfectly fine in Eclipse, but once I export it as a runnable jar, I get the following error: Cannot run program "src/script.sh": error=2, No such file or directory

I have tried:

Runtime.getRuntime().exec("script.sh");

As well as

new ProcessBuilder("src/script.sh").start();

The Bash script takes in no input and does not return any output

Answer 1

Your script is buried inside the jar file and doesn't exist as a standalone file, that's why Java can't "execute" it. You need to read it at runtime using the resources API, then save it to some (temporary?) directory, set its executable permission, and only then run it using ProcessBuilder or some such.