JavaServer Faces (JSF) is a JavaWeb application frameworkdevelopmentuser interfaces

JSF is a request-driven MVCFaceletsstateSaving (note: transient true)), and restored upon next creation of that view. Several types of state-saving are available, including Client-side and Server-side state saving. Out of the box, JSF 1.x uses JavaServer PagesXULFacelets

Core features

JSF versions

JSF and Ajax

JSF is often mentioned together with AjaxRich Internet applicationMojarra[1]) and MyFaces were originally developed for HTML only, and Ajax had to be added via JavaScript. This has changed, however:

Because JSF supports multiple output formats, Ajax-enabled components can easily be added to enrich JSF-based user interfaces. The JSF 2.0 specification provides built in support for Ajax by standardizing the Ajax request lifecycle, and providing simple development interfaces to Ajax events, allowing any event triggered by the client to go through proper validation, conversion, and finally method invocation, before returning the result to the browser via an XML DOM update.

JSF 2 includes support for graceful degradationJavaScript

Ajax-enabled components and frameworks

The following companies and projects offer Ajax-based JSF frameworks or component libraries:

Latest developments

Facelets

The new JSF developments also provide wide accessibility to Java 5 annotations such as @ManagedBean, @ManagedProperty and @FacesComponent which removes the need for faces-config.xml in all cases save framework extension. Navigation has been simplified, removing the need for faces-config.xml navigation cases. Page transitions can be invoked simply by passing the name of the desired View/Facelet.

Addition of Partial State Saving and DOM updates are part of the built in standardized Ajax

The latest JSF release has built-in support for handling resources like images, CSS and Javascript, allowing artifacts to be included with component libraries, separated into JAR files, or simply co-located into a consistent place within the web-application. Includes logical naming and versioning of resources.

JSF 2.0 also includes a number of other changes like adding support for events, RAILS_ENV style development stages and significantly expanding the standard set of components.