Ok it wasn't as bad as I briefly anticipated to set up a url redirection scheme for getting nice URLs with Spring MVC. I found this nice answer on stackoverflow that actually linked to a sample MVC project in spring's repository that shows a really easy to use example of how to use the Tuckey url rewriting filter.
Firsty you simply map all your Spring MVC classes under a path like /controllers. Then you set up explicit redirects to all your subdirectories that contain static files like /javascript, /css and so on and anything that doesn't match that gets mapped to a url where the path starts with /controllers. After doing this I almost (but not quite yet) have figured out all the parts to be used in a simple web app. I was able to get my Spring-managed EntityManager injected and managed to get it to run some queries. But I still have to read the Spring manual chapter on transactions because I still don't feel like I know that well how they work yet. I could just follow a tutorial and just use the <tx:annotation-driven> element and annotate my classes and methods with @Transactional and everything would probably work. But like with all other technologies I've been learning for Java EE recently, I don't like using stuff without understanding how they work.
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