Looking for a KISS webapp framework

The landscape of java frameworks for Web Applications is one of most various and controversial ever seen in any technical context.

If you look into the internet you will find a ton of frameworks, less or more known by the big community. And if you ask into newsgroups or mailing lists you will find a big variety of different opinions about them. There are also several philosophies: some frameworks (most of them, honestly) rely on the MVC pattern; some others mix application code with html/xml code. There are component based frameworks, action based ones; with declarative and iterative approach; ajax versus standard html and so on.

The life is not simple for the Java* KISS web programmer.