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> ## JavaServer Faces Technology Benefits

> One of the greatest advantages of JavaServer Faces technology is that it offers a clean separation between behavior and presentation. Web applications built with JSP technology partially achieve this separation. However, a JSP application cannot map HTTP requests to component-specific event handling or manage UI elements as stateful objects on the server. JavaServer Faces technology allows you to build Web applications that implement finer-grained separation of behavior and presentation traditionally offered by client-side UI architectures.

> The separation of logic from presentation also allows each member of a Web application development team to focus on their piece of the development process, and provides a simple programming model to link the pieces together. For example, Page Authors with no programming expertise can use JavaServer Faces technology UI component tags to link to application code from within a Web page without writing any scripts.

> Another important goal of JavaServer Faces technology is to leverage familiar UI-component and Web-tier concepts without limiting you to a particular scripting technology or markup language. While JavaServer Faces technology includes a JSP custom tag library for representing components on a JSP page, the JavaServer Faces technology APIs are layered directly on top of the JavaServlet API. This allows you to do a few things: to use another presentation technology besides JSP, to create your own custom components directly from the component classes, and to generate output for different client devices.

> Most importantly, JavaServer Faces technology provides a rich architecture for managing component state, processing component data, validating user input, and handling events.

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