Current the context from a servlet - to open a file?

[Jeff Taylor]

When running a servlet (located in webapps/myapp/WEB-INF/classes) I'd
like to open a ascii file (located in webapps/myapp).  What's the best
way of obtaining the current Context -- so as not to hardcode it in?  Is
there an appropriate class/method to call?  Thanks in advance!

Jeff