NullPointerException trying to load a file

Question

Scenario is the following:

Developing a jsp application with jdeveloper
Deploying to Oracle Weblogic
All files are in the same project
Source files are inside packages that are inside the src folder
Inside the Resources folder are two files: menu.json and TestWS.properties

So, I made a java class that should read menu.json and return a menu (in html) based on its structure.

When, inside the class, I do this

InputStream i =
    Thread.currentThread().getContextClassLoader().
        getResourceAsStream("Resources/menu.json");
BufferedReader r = new BufferedReader(new InputStreamReader(i));

The InputStreamReader constructor throws a NullPointerException, I suppose because it can't find the file.

Funny thing is, if I try to load TestWS.properties instead, it loads it just well.

I tried checking the project's properties, manually added both files under Project Source Path -> Resources, adding the .json extension to Compiler -> Copy file types to output directory, renamed, deleted, recreated, changed extension to the json file, deployed to WAR and loaded the project on another machine running weblogic, but to no avail.

Is there anything else I'm missing?

Did you check that the json file is correctly exported in the war file (by decompressing it) ? — Denys Séguret, Jul 12 '12 at 09:54
@dystroy actually no. I just checked and it doesn't. How do I include it? (I'm very very new to this kind of stuff...) — Federico klez Culloca, Jul 12 '12 at 09:59
Thread.getContextClassLoader == null... see http://stackoverflow.com/questions/225594/thread-getcontextclassloader-null — Luca, Jul 12 '12 at 09:59
@Luca if it was the case, it wouldn't load TestWS.properties — Federico klez Culloca, Jul 12 '12 at 10:02
If you are building the WAR file with JDeveloper, there must be some option somewhere which makes it exclude the .json file from the war. — Flavio, Jul 12 '12 at 10:31
Can't find it, but if I move the json file to the public_html folder it seems to see it. When the web services are up again, I'll try again if it runs. — Federico klez Culloca, Jul 12 '12 at 10:33
The file is there, but still can't read it, both trying to load "menu.json" and "/menu.json" — Federico klez Culloca, Jul 12 '12 at 10:41
Take a look at http://tompeez.wordpress.com/2012/05/13/jdeveloper-controlling-which-resources-files-are-copied-into-the-projects-output-directory/ — Jim Garrison, Jul 12 '12 at 23:51
@JimGarrison thanks. Please post that as an answer so I can accept it — Federico klez Culloca, Jul 16 '12 at 13:38

score 1 · Accepted Answer · answered Jul 16 '12 at 16:23

1

This is explained in this article.

In short, you have to change the compiler setting "Copy File Types to Output Directory" to include the extension of the resources you want to have available at runtime.

answered Jul 16 '12 at 16:23

Jim Garrison

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NullPointerException trying to load a file

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