Web tier: servlets, JSP, Web frameworks: JSF, Struts whats for?
I've tried to study struts and I've looked at JSF and I think that:
-Why do we have to use them? Just to build HelloWorld web application, we have to provide so much xml. So what are their advantages? Explain to me please! :)
-Is it real that many people using struts have migrate to JSF?
For simple, basic and small web applications then MVC frameworks like struts and JSF are overkill. If you have ever developed any larger web applications though you will know that it soon becomes unweildy to create simple pages that statically link together. By using something like JSF or struts it allows you seperate your flow control from your presentation and business rule tiers so that during development it is much easier to redesign your application or change the flow or its use without adversely affecting a large chunk of code. This means that with larger applications the overhead and work required for continued development is much smaller WITH the use of JSF or struts.
Another good resource for all things JSF is http://www.jsfcentral.com/
Oh and here is an article from the creator of struts about JSF vs Struts that answers your questions about migration between struts and JSF
Oh and here is an article from the creator of struts about JSF vs Struts that answers your questions about migration between struts and JSFoops forgot the URL:
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