Is there any web framework for Java?

Question

Can you build a website only with Java? what framework will you use? how hard it can be?

Answer 1

Yes, you can develop web applications with JSP a.k.a. Java Server Pages.
I'm not experienced with JSP but some framework names I've heard repeatedly and might be worth checking out:
- Spring MVC
- Google Web toolkit
- Struts
you can probably Google "JSP Frameworks" for more.