just wanna survey whether are they many struts developers in msia

No need to survey lar, I can tell you its quite popular. However this is mostly refering to struts 1.x. Note sure about the struts 2, nowadays it has a lot of other competing web frameworks.

can i say this is one of the best frameworks for web apps?

then wat about JSF. Since now AJAX is so hot and there is some latest combination of AJAX with JSF, I think it might increase the usage of JSF.

Popular...but i don't know...

Popular maybe (well used to be), but best it definitely is not. Struts 1.x has quite some shortcomings, hence there was a proliferation of different web frameworks.

One of the newer web frameworks which will be part of JEE would be JSF and Sun is pushing this even though there isnt as much usage of these in existing applications (which I think is normal since its not out as long as struts is).

Of course with any web framework, you'll have evangelists as well as critics. If you're looking for web frameworks for your project, you'd need to identify those that fits your requirements, there is no silver bullet. If you're trying to figure out which web framework to invest in to learn so you can broaden your job hunting proficiency, I'd say struts is useful for now but I cant predict the future so cant really help you on what fits down the road

I don't think it is much on the popularity of Struts per se, but more the MVC Design Pattern. As we all know, Struts was one of the first web application frameworks that adopted the MVC (Model-View-Controller) concept, allowing for clean separation of presentation and controller aspects within the web tier.

There were other frameworks that mushroomed from the MVC paradigm, such as Apache Tapestry (which didn't gain much popularity, due to performance problems), and JSF.

Nonetheless, Struts has been adopted as the industrial standard for most J2EE software development for quite some time.