01.SpringMVC基础教程HelloWorld之登录

         SpringMVC都不陌生,Spring MVC属于SpringFrameWork的后续产品，已经融合在Spring Web Flow里面。Spring 框架提供了构建 Web 应用程序的全功能 MVC 模块。使用 Spring 可插入的 MVC 架构，可以选择是使用内置的 Spring Web 框架还可以是 Struts 这样的 Web 框架。

不废话了，本文主要是演示springMVC环境搭建以及一个简单的登录,不涉及到dao操作

首先是本工程截图 (dao是象征性的写进去的,后续再修改)

创建工程,并创建package后,在domain包下创建一个User对象

package cn.wangsitu.domain;import java.io.Serializable;public class User implements Serializable{private static final long serialVersionUID = 1L;private Integer id;private String username;private String password;public User() {}public User(String username, String password) {this.username = username;this.password = password;}<span style="white-space:pre"></span>setXXX getXXX 略}

UserDao代码

package cn.wangsitu.dao;import org.springframework.stereotype.Repository;import cn.wangsitu.domain.User;@Repository//通过spring注解定义一个daopublic class UserDao {public User login(String username,String password){User u = new User(username, password);return u;}}

UserService代码

package cn.wangsitu.service;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Repository;import cn.wangsitu.dao.UserDao;import cn.wangsitu.domain.User;@Repositorypublic class UserService {@Autowired //将UserDao自动注入进来private UserDao userDao;public User login(String username,String password){return userDao.login(username, password);}}

LoginCommad代码

package cn.wangsitu.web;public class LoginCommad {private String username;private String password;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

下面是比较重要的LoginController

package cn.wangsitu.web;import javax.servlet.http.HttpServletRequest;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import cn.wangsitu.domain.User;import cn.wangsitu.service.UserService;@Controller@RequestMapping(value="/admin")public class LoginController {@Autowiredprivate UserService userService;@RequestMapping(value = "/login.html")public String loginPage(){return "login";}@RequestMapping(value = "logon.html")public ModelAndView logon(HttpServletRequest request,LoginCommad loginCommand){if("zhangsan".equals(loginCommand.getUsername())){User user = userService.login(loginCommand.getUsername(), loginCommand.getPassword());request.getSession().setAttribute("user", user);return new ModelAndView("index");}else{return new ModelAndView("login","error","用户名或密码错");}}}

下面我们来看配置

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"id="WebApp_ID" version="3.0"><!-- SpringMVC配置 --><context-param><param-name>contextConfiguration</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><servlet><servlet-name>viewspace</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class></servlet><servlet-mapping><servlet-name>viewspace</servlet-name><url-pattern>*.html</url-pattern>  //这里写.html 是方便搜索引擎记录 可自定义</servlet-mapping></web-app>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8" ?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd       http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-3.1.xsd       http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd       http://www.springframework.org/schema/aop       http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">        <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->    <context:component-scan base-package="cn.wangsitu.dao"/>    <context:component-scan base-package="cn.wangsitu.service"/>            <!-- 配置数据源 --></beans>

viewspace-servlet.xml

<?xml version="1.0" encoding="UTF-8" ?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd       http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-3.1.xsd       http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd       http://www.springframework.org/schema/aop       http://www.springframework.org/schema/aop/spring-aop-3.1.xsd"><context:component-scan base-package="cn.wangsitu.web"/>        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"      p:viewClass="org.springframework.web.servlet.view.JstlView"      p:prefix="/WEB-INF/jsp/"      p:suffix=".jsp"      />      </beans>      

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