See also
- Comparison of web frameworks
- Wt, the C++ project from which JWt is derived
| Original author(s) | Emweb |
|---|---|
| Initial release | 1.0.0 / December 2005 |
| Stable release | 4.6.1 / December 27, 2021 [1] |
| Repository | github |
| Written in | Java |
| Operating system | Cross-platform |
| Type | Web framework |
| License | Dual License: GNU General Public License or Commercial License |
| Website | www |
JWt (pronounced "jay-witty") is an open-source widget-centric web application framework for the Java programming language developed by Emweb. It has an API that uses established GUI application development patterns. The programming model is component-based and event-driven, similar to Swing.
The goal of the library is to benefit from the stateful component model used in desktop applications APIs, applied to web development, instead of the traditional model–view–controller (MVC) model. Rather than using MVC at the level of a page, MVC is pushed to the level of individual components.
While the library uses a desktop application development model, it does support web-specific features including semantic URLs, browser history navigation support, internationalization, themes, and styling.
A unique feature of the library is its abstraction layer of the browser rendering model. The library uses Ajax for communicating with Ajax-capable browsers, while using plain HTML form post-backs for other user agents (for accessibility and search engines). Using a progressive bootstrap method, the user interface is initially rendered as plain HTML, and for Ajax-capable browsers, it is automatically upgraded to use Ajax for increased interactivity.
JWt is distributed as a jar file. A JWt application is a war file that is deployed in a standards-compliant servlet container.
See the feature list on the project homepage for a more detailed overview. [2]
The Hello World! [3] example full source code [4]
/* * A simple hello world application class which demonstrates how to react * to events, read input, and give feed-back. */publicclassHelloApplicationextendsWApplication{publicHelloApplication(WEnvironmentenv){super(env);setTitle("Hello world");getRoot().addWidget(newWText("Your name, please ? "));finalWLineEditnameEdit=newWLineEdit(getRoot());nameEdit.setFocus();WPushButtonbutton=newWPushButton("Greet me.",getRoot());button.setMargin(5,Side.Left);getRoot().addWidget(newWBreak());finalWTextgreeting=newWText(getRoot());button.clicked().addListener(this,newSignal.Listener(){publicvoidtrigger(){greeting.setText("Hello there, "+nameEdit.getText());}});}}
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