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This article is to share with you about what JSF is. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

What is JSF

JSF and JSP are a new pair. JSP is a technology used for logical processing in the background, while JSF, on the contrary, is a technology that enables developers to quickly develop Java-based Web applications and is a presentation layer technology. At present, JSF1.2 has been officially added to Java EE 5 as a standard.

As a highly componentized technology, developers can implement drag-and-drop editing with the support of some development tools. Users can easily develop Web by simply dragging JSF components onto the page. This is its greatest advantage as a component-based technology, we can use not only some relatively simple input boxes and so on, but also more complex components that can be used, such as table components like DataTable, tree components like Tree, and so on.

As a standard technology, JSF is also supported by a considerable number of tool providers. At the same time, we will also have a lot of good free development tools to use. Not long ago, Sun Java Studio Creator 2 and Oracle JDeveloper 10g were released as free development tools to support JSF, which brought a lot of life to JSF. In addition, we also have some excellent commercial development tools to choose from. Plug-in development tools such as BEA Workshop (formerly M7 NitroX) and Exadel,MyEclipse, which are based on Eclipse, have brought great convenience to the majority of Eclipse users. IBM's Rational Application Developer and Borland's JBuilder are also very good commercial development tools that support JSF visualization and development.

JSF is essentially different from the traditional Web technology. In the traditional Web technology, users need to capture the browser request, save the client state, and manually control the page transfer, and so on. The emergence of JSF undoubtedly brings us great convenience. JSF provides an event-driven page navigation model, which enables application developers to design the page flow of an application. In a similar way to Struts, all page flow information is defined in the JSF configuration XML file (faces-config.xml), not hard-coded in the application. This greatly simplifies the difficulty of development for developers and simplifies the development of applications.

At the same time, JSF is also a framework that follows the model-view-controller (MVC) pattern. The complete separation of view code (View) and application logic (Model) is realized, so that the application program using JSF technology can realize the separation of page and code. All requests for JSF pages are processed through a front-end controller (FacesServlet), and the system automatically processes the user's request and returns the result to the user. This is not much different from the traditional MVC framework.

In JSF, we not only use POJO technology, but also use Spring-like IoC (or dependency injection-DI) technology. In JSF's Backing Bean, we can put the data and operations needed by the view into a Backing Bean. At the same time, thanks to the DI technology used by JSF, we can initialize Managed Bean in the configuration file, and we can also easily integrate with Spring using similar technology.

Thank you for reading! This is the end of this article on "what is JSF?". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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