package com.weixin.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.weixin.model.User;
import com.weixin.service.UserService;
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping("/showUser")
public String show(Model model){
List<User> list = userService.queryAll();
model.addAttribute("list", list);
return "showUser";
}
@RequestMapping("/toAdd")
public String add(){
return "add";
}
@RequestMapping("/addUser")
public String addUser(User user){
userService.addUser(user);
return "redirect:showUser";
}
@RequestMapping("/toDelete")
public String deleteUser(int id){
userService.deleteUser(id);
return "redirect:showUser";
}
@RequestMapping("/tofindId")
public String findUserId(int id,Model model){
User user = userService.findUserById(id);
model.addAttribute("user", user);
return "update";
}
@RequestMapping("/update")
public String updateUser(User user){
userService.updateUser(user);
return "redirect:showUser";
}
}
Spring+SpringMVC+Mybatis+jsp之简单的增删改查Demo
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在IT行业中,Spring、SpringMVC和Mybatis的整合(简称SSM)是Java Web开发中的常见技术栈,尤其适用于构建企业级应用。这个“Spring+SpringMVC+Mybatis+jsp之简单的增删改查Demo”是一个典型的教程,旨在帮助开发者理解如何将这些组件集成并实现基本的数据操作功能。 **Spring框架**是Java应用程序的核心容器,它提供了依赖注入(DI)和面向切面编程(AOP)等关键功能。在本示例中,Spring管理了整个应用的组件,包括数据库连接、业务逻辑和服务接口等。它通过XML配置或Java配置来定义bean的创建和装配,使得各个组件之间的关系变得松散,提高了代码的可测试性和可维护性。 **SpringMVC**是Spring框架的一个模块,专门用于处理Web请求。它遵循模型-视图-控制器(MVC)设计模式,负责接收HTTP请求,转发到相应的控制器处理,然后将处理结果返回给视图。在本Demo中,SpringMVC会配置拦截器、视图解析器等,以处理jsp页面的展示和跳转。 **Mybatis**是一个持久层框架,它简化了与数据库交互的过程。Mybatis允许开发者编写SQL语句,将它们映射到Java对象上,通过注解或XML配置文件来实现数据访问。在这个案例中,Mybatis会与MySQL数据库配合,完成对数据的增、删、改、查操作。 **JSP(JavaServer Pages)**是Java的动态网页技术,用于生成HTML响应。在SSM整合中,JSP通常作为视图层,负责显示数据。开发者可以使用EL(Expression Language)和JSTL(JavaServer Pages Standard Tag Library)标签库来方便地访问和展示模型数据。 在本Demo的实现过程中,首先需要配置SSM的环境,包括添加相关依赖库,设置Spring和Mybatis的配置文件,以及数据库连接信息。接着,定义实体类(Entity)、Mapper接口和Mapper XML文件,以描述数据库表结构和SQL操作。然后,创建Service接口和实现类,实现业务逻辑,并由Spring管理。同时,编写Controller类,处理HTTP请求,调用Service进行数据操作,并返回结果给JSP页面。设计JSP页面,展示数据,并提供用户交互界面。 通过这个Demo,开发者可以学习到如何在实际项目中搭建SSM框架,理解各组件之间的协作机制,以及如何编写基本的增删改查功能。这将为更复杂的企业级应用开发打下坚实的基础。同时,对于初学者来说,这是一个很好的实践平台,能够提升其Java Web开发技能。
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