I'd like to make some Java/JSTL servlets that access an oracle database.
Can someone recommend a hosting service?
I'm most familiar with the open source products like JBoss and Jetty and tomcat.
You know Oracle is wickedly expensive, right? Expect a yearly license fee of 5000 or even 80000 dollars just to be allowed to use it for commercial purposes, price depending on what you're going to do with it and on what kind of hardware it is going to run on.
Other than that: nobody can recommend you where you should be throwing your money at. Perform research yourself and if you're stuck choosing between different options provide them here and perhaps someone will have an opinion on it (likely not though).