What is JavaServer Faces

JSF is new standard framework, developed through Java Community Process (JCP) that makes it easy to build user interfaces for java web applications by creating reusable components in a page. You can think of JSF framework as a toolbox that is full of ready to use components. So JSF applications are event driven. You typically embed components in a jsp page using custom tags defined by JSF technology and use the framework to handle navigation from one page to another. Components can be nested within another component, for example, input box, button in a form. JSF is based on well established Model-View-Controller (MVC) design pattern. Applications developed using JSF frameworks are well designed and easy to maintain then any other applications developed in JSP and Servlets. Unlike request-driven MVC web frameworks, JSF uses a component-based approach. The state of UI components is saved when the client requests a new page and restored when the request is returned JSF includes: A set of APIs for representing user interface (UI) components and managing their state, handling events and input validation, converting values, defining page navigation, and supporting internationalization and accessibility A default set of UI components Two JavaServer Pages (JSP) custom tag libraries for expressing a JavaServer Faces interface within a JSP page. A server-side event model State management Managed Beans (JavaBeans created with dependency injection)