I'm already working with JSF 2.2 and java beans and EJB3 (CDI and not seam framwork). I learned how to use JaxRS Restful and i want to khnow If I can improve my projects by using this technology with my JSF pages? JSF works only with one servlet and to use restful I have to add another servlet in the web.xml file?
You can add as many Servlets as you want to your JavaEE web project.
You could either add another servlet to the web.xml file, or use annotations. I suggest you check out the Oracle JavaEE tutorials for examples.