NullPointerException尝试加载文件

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?

Answer 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.