Java play framework null pointer exception in reflection giving file

Question

In java play framework project I do not figure out in retrieving file sample.txt in same package of my current controller class.

I try with this command:

URL resource = MyController.class.getResource("text.txt");

This is my current project structure:

- app
---- test
--------- controller
------------- MyController
------------- text.txt

I have tried with a similar command:

 InputStream resource = MyController.class.getResourceAsStream("text.txt");

or

ClassLoader cl = getClass().getClassLoader();
File file = new File(cl.getResource("text.txt").getFile());

Same null pointer.

How can I solve it?

Answer 1

Maybe the instruction: cl.getResource("text.txt").getFile() in play framework do not get the file in the path getClass().getClassLoader() . It can be a visibility problem. Play framework can not access to all project folder via getClassLoader(). Try to put the file into conf folder and get it with Play.application().resourceAsStream("file.txt");

Answer 2

Controller directory it is not the execution directory, it is only for the source code files.

Work directly with ressources, for your case, intenal usages, see https://www.playframework.com/documentation/2.8.x/sbtCookbook#Configure-externalized-resources