WebWork

WebWork简介

WebWork Architecture

WebWork是由OpenSymphony组织开发的，致力于组件化和代码重用的拉出式MVC模式J2EE Web框架。

WebWork目前最新版本是2.2.4，现在的WebWork2.x前身是Rickard Oberg开发的WebWork，但现在WebWork已经被拆分成了Xwork1和WebWork2两个项目。

Xwork简洁、灵活功能强大，它是一个标准的Command模式实现，并且完全从web层脱离出来。 Xwork提供了很多核心功能：前端拦截机（interceptor），运行时表单属性验证，类型转换，强大的表达式语言（OGNL – the Object Graph Notation Language），IoC（Inversion of Control倒置控制）容器等。 WebWork2建立在Xwork之上，处理HTTP的响应和请求。WebWork2使用ServletDispatcher将HTTP请求的变成 Action(业务层Action类), session（会话）application（应用程序）范围的映射，request请求参数映射。WebWork2支持多视图表示，视图部分可以使用 JSP, Velocity, FreeMarker, JasperReports，XML等。在WebWork2.2中添加了对AJAX的支持，这支持是构建在DWR与Dojo这两个框架的基础之上.【EclipseWork：用于WebWork辅助开发的一个Eclipse插件】

WebWork架构

XWork是一个命令行模式框架，它是WebWork的基础。WebWork在XWork之上添加了一个MVC的Web应用框架。XWork的核心概念包括 Action、Interceptor、Result。WebWork扩展了这些概念的基础实现，用于支持对 Web 应用的开发。

基本特色

• A flexible Validation framework allowing you to decouple validation rules from your action code.
• Type Conversion allowing you to easily convert objects from one class to another, solving one of the most tedious efforts when creating web apps.
• A powerful Expression Language based on OGNL allowing dynamic object graph traversal and method execution and transparent access to properties from multiple beans using a ValueStack. Webwork also has the ability to use JSTL.
• Inversion of Control integration that manages component lifecycle and dependencies without the need to build registry classes that clients must call to obtain a component instance. WebWork recommends Spring for IoC.
• Reusable Tags that allow for easy and reusable component-oriented web development using Themes and Templates
• Advanced Interceptors that provide for various rich functionality, including preventing multiple form submissions and executing long running queries in the background.
• Hierarchical and pluggable support for Internationalization.
• Easy integration with third party software including Hibernate, Spring, Sitemesh, and JSTL.
• Support for many view technologies such as JSP, FreeMarker, and JasperReports.
• Modular Configuration Files using packages and namespaces to manage hundreds of actions.
• Advanced AJAX features provided by the ajax theme.

相关链接

• 官方网站 http://www.opensymphony.com/webwork/
• 下载 http://www.opensymphony.com/webwork/download.action
• http://webwork.javascud.org/