What are the problems of spring license? It's a clear apache 2.0 license which is quite used in the java world. (edit: ok, noticed that the wikipedia page was wrong, I've corrected it)
Additionally, even though I'm not a fan of the following frameworks, but any java web dev know about jsf (due to being pushed as the "standard enterprise web framework") and vaadin.
Additionally, even though I'm not a fan of the following frameworks, but any java web dev know about jsf (due to being pushed as the "standard enterprise web framework") and vaadin.