Why use JSF 1.2 over JSF 2.0

when searching for solutions to problems I have writing a JSF 2.0 application, 99% of the questions and answers refer to JSF 1.2

I know there are differences (ie. a lot of nav rules in 1.2 use a special xml file, and 2.0 doesn't do 开发者_开发知识库that)

is there a reason that most people seem to be using 1.2? is it better, is JSF 2.0 too new and no one knows anything about it?

In Java EE world, business companies upgrade relatively slow. It's not uncommon that they only upgrade when the maturity of a new technology has proven itself after one or two years or even more. JSF 1.0 was also by almost everyone skipped. Most started with JSF 1.1 or 1.2 only. Also, JSF 1.2 existed for relatively a long time, that's why most of the existing JSF questions/answers concerns JSF 1.2. However, currently I see here at Stackoverflow a trend that more and more JSF 2.0 questions are been asked and answered as compared to JSF 1.x.

If you have a JSF 2.0 specific issue for which you can't find an answer yet, just ask it here. This way we can build together towards a great knowledge base. That's where Stackoverflow is all about. If you explore/search the jsf-2.0 tag and the frequently asked questions, you'll find several great JSF 2.0 specific questions and answers.

My recommendation would be, stick to JSF 2.0. It's so much better than JSF 1.2.