Question

I have a big issue doing something really stupid. That is to say open a stream to a resource file in my META-INF folder. I am working on a jar tool and on doing this:

InputStream schemaIS = this.getClass().getClassLoader().getResourceAsStream("/META-INF/schema.xsd");

I simply get a null! The project is built using maven and the xsd file ends up in the META-INF folder, but it still won’t work.

What I don’t understand is the theory behind it? How do the ClassLoader execute the lookup in the file system? How do I get my hands on the file?

Answer 1

Try removing first slash:

InputStream schemaIS = this.getClass().getClassLoader().getResourceAsStream("META-INF/schema.xsd");

You need a leading slash if you are calling the getResourceAsStream method on a Class object. On a ClassLoader object, the path is always absolute, and the leading slash is not necessary.