struts2需要的jar包
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Struts2是一个非常著名的Java Web开发框架,由Apache软件基金会维护。它基于MVC(Model-View-Controller)设计模式,旨在简化Web应用程序的开发,提高可维护性和可扩展性。Struts2提供了丰富的功能,如拦截器、插件体系、国际化支持、强大的动作和结果配置等。 在创建一个Struts2项目时,你需要引入一系列的JAR(Java Archive)文件,这些文件包含了Struts2框架的核心组件以及其依赖的库。在你提供的"struts-2.3.24-lib"压缩包中,包含了以下关键的JAR文件: 1. **struts2-core.jar**: 这是Struts2的核心库,包含了核心的控制器、拦截器、配置处理等实现。 2. **xwork-core.jar**: XWork是Struts2的基础,提供了一些基础的行动处理、类型转换、异常处理等功能。 3. **ognl.jar**: OGNL(Object-Graph Navigation Language)是用于对象属性导航的语言,Struts2使用OGNL进行表达式语言处理,如在Action类和JSP页面中的数据绑定。 4. **freemarker.jar**: Freemarker是一个模板引擎,Struts2默认使用它来生成动态视图。 5. **struts2-convention-plugin.jar**: 该插件实现了约定优于配置的策略,使得开发者无需显式地编写XML配置文件,只需遵循一定的命名规则,就可以让Struts2自动识别Action和结果。 6. **struts2-dojo-plugin.jar** (如果存在): 这个插件为Struts2提供了与Dojo JavaScript库的集成,用于创建富客户端应用。 7. **struts2-tiles-plugin.jar** (如果存在): Tiles是用于构建页面布局的框架,这个插件使得Struts2能够与Tiles集成,方便管理页面模板。 8. **struts2-json-plugin.jar** (如果存在): 提供了JSON支持,使得Action可以返回JSON格式的数据,方便前后端交互。 9. **commons-logging.jar**: 通用的日志记录接口,Struts2使用它进行日志输出。 10. **commons-fileupload.jar** 和 **commons-io.jar**: 用于处理HTTP请求中的文件上传。 11. **javassist.jar**: 动态字节码操作库,Struts2使用它进行类的增强和拦截器的实现。 12. **其他的依赖库**: 如servlet-api.jar、jsp-api.jar等,这些是Java Web开发的标准库,通常在部署到应用服务器时由服务器提供,但在开发环境中需要包含。 在实际项目中,根据需求可能会有其他特定的插件和库,例如用于测试的struts2-struts1-plugin.jar或struts2-spring-plugin.jar(用于Spring整合)。配置这些JAR文件到项目的类路径后,你就可以开始搭建和使用Struts2框架了。 在使用Struts2时,开发者通常会创建Action类来处理用户请求,通过配置struts.xml文件定义Action的映射、结果类型、拦截器链等。同时,利用OGNL,可以在Action类和JSP页面之间轻松地传递数据。Struts2的拦截器机制允许开发者定义自定义的行为,如日志、权限检查、性能统计等,提高了代码的复用性和模块化。 Struts2是一个功能强大且成熟的Java Web开发框架,通过合理的配置和使用,可以极大地提高开发效率,降低项目复杂度。了解并熟练掌握Struts2的各个组件和使用方法,对于Java Web开发者来说至关重要。
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