SSH 框架做的教学生的简单CRUD
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SSH框架是Java Web开发中的一种经典组合,由Spring、Struts和Hibernate三个开源框架组成,分别负责控制层、视图层和持久层的功能。这个"SSH框架做的教学生的简单CRUD"项目,显然是为了帮助初学者理解如何在实际项目中应用SSH框架进行基本的数据操作,即创建(Create)、读取(Retrieve)、更新(Update)和删除(Delete)。 让我们深入了解一下SSH框架的每一个组成部分: 1. **Spring**:Spring是一个全方位的框架,它提供了依赖注入(DI)和面向切面编程(AOP)等核心特性,用于简化Java应用程序的开发。在CRUD操作中,Spring可以管理Bean的生命周期,处理事务,并通过AOP实现如日志记录、权限验证等功能。 2. **Struts**:Struts是MVC(Model-View-Controller)架构的一部分,主要负责处理HTTP请求并转发到相应的业务逻辑。在CRUD应用中,Struts的Action类接收用户请求,调用服务层的方法,处理结果后返回到对应的JSP页面。 3. **Hibernate**:Hibernate是一个对象关系映射(ORM)工具,它将Java对象与数据库中的表进行映射,简化了数据库操作。在CRUD场景下,Hibernate通过SQL语句处理数据的增删改查,提供了透明化的数据访问。 项目中包含的JAR包可能是SSH框架的核心库以及相关的依赖,如数据库驱动等。源码部分则可能包括以下结构: - **Controller**:Struts的Action类,定义了处理HTTP请求的逻辑,比如处理用户提交的表单,调用Service层方法。 - **Service**:业务逻辑层,封装了对DAO的操作,提供给Controller调用,处理CRUD操作。 - **DAO**:数据访问对象,直接与数据库交互,执行Hibernate的Session操作。 - **Model**:实体类,代表数据库中的表,通常包含属性和getter/setter方法。 - **配置文件**:如struts.xml、spring-context.xml和hibernate.cfg.xml,分别配置Struts、Spring和Hibernate的行为。 - **JSP**:视图层,展示数据,通常包含HTML和JSTL标签,可能还有一些EL表达式用于显示模型数据。 学习这个项目,学生可以了解到如何整合这三个框架,设置配置文件,编写Action,设计实体类,以及使用Hibernate进行数据库操作。同时,他们还能实践如何通过Maven或Gradle管理依赖,以及如何使用IDE(如Eclipse或IntelliJ IDEA)进行开发。 这个项目对于初学者来说是一个很好的起点,能够帮助他们建立起SSH框架的基本认知,为进一步的Web开发打下坚实的基础。通过实际操作,学生不仅可以掌握SSH框架的核心概念,还能提高解决问题和调试代码的能力。
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