Java view technologies and frameworks: Difference between revisions

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{{Short description|NoneProgramming language and libraries}}

'''Java view technologies and frameworks''' are [[web-based]] [[software libraries]] that provide the [[user interface]], or "[[Model–view–controller|view-layer]]", of [[Java (programming language)|Java]] [[web application]]s. Such [[application framework]]s are used for defining [[web page]]s and handling the [[HTTP]] [[List of HTTP header fields#Requests|requests]] (clicks) generated by those web pages. As a sub-category of [[web framework]]s, view-layer frameworks often overlap to varying degrees with web frameworks that provide other functionality for Java web applications.

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! Action-based frameworks:

| [[Apache Struts 2|Apache Struts]], [[Spring Framework|Spring MVC]]

|-

! Component-based frameworks:

| [[Apache Click]], [[Apache Tapestry]], [[Apache Wicket]], [[Jakarta Server Faces|Jakarta Faces]]

|-

! Web template systems:

| [[Apache Tiles]], [[SiteMesh]], [[Thymeleaf]]

|-

|}

* [[Jakarta Server Faces|Jakarta Faces]] (JSF), [[Apache Tapestry]] and [[Apache Wicket]] are competing component-based technologies, abstracting the [[Stateless protocol|stateless]] HTTP request-response cycle and the [[Jakarta Servlet]] [[API]] behind an [[Object-oriented programming|object-oriented]], event-driven component model.

* In contrast, Struts and the [[Spring Framework|Spring MVC Framework]] are action-oriented frameworks that provide a thinner [[abstraction layer]] over the servlet [[API]].

* Apache Tiles is a templating framework designed to work with Struts.

* [[Facelets]] is a view definition and templating technology designed to work with JSF.

* [[SiteMesh]] can be used with any [[Jakarta Server Pages|Jakarta Pages]] (JSP).

* Facelets, Tapestry and Wicket have their own templating approaches based on [[HTML]]/[[XHTML]].

* [[Apache Click]] uses HTML based [[Apache Velocity]] templates and [[plain old Java object]]s (POJOs), with JSP optional.

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==Apache Struts==

{{main |Apache Struts 2}}

* Struts provides for a [[coupling (computer programming)|decoupling]] of the Controller and the View.

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* '''Competitor''': Tapestry, JSF

==Jakarta Faces (JSF) and Facelets==

{{main |Jakarta Server Faces |Facelets}}

* A specification for component-based view frameworks.