JavaServer Faces (JSF) framework:

JavaServer Faces is a new framework for creating Web applications using Java. JSF gives you with the following main features:

• Basic user interface elements like input fields, buttons, links etc. and custom components like tree/table viewer, query builder etc. JSF was creating with a component model in mind to give tool developers to support Rapid Application Development (RAD). User interfaces can be made from these reusable server-side elements.
• Gives a set of JSP tags to access interface components. Also Gives a framework for implementing custom components.
• Allows mark up languages other than HTML like WML (Wireless Markup Language) by encapsulating component rendering and event handling. There is a single controller servlet every request sends through where the job of the controller servlet is to receive a faces page with elements and then fire off events for each component to render the elements using a render tool kit.
• Uses a declarative navigation model by describing the navigation rules inside the XML configuration file faces-config.xml . This configuration file also describes bean resources used by JSF.
• JSF may hook into your model, which seems the model is loosely coupled from JSF.