springMVC学习+登陆小实例讲解

      之前在学习SpringMVC的过程中，写了一个springMVC的实例，今天终于有时间把这个例子传上来。这个例子就是做了登陆这个最最简单的功能，使用springMVC尽可能简单的配置来实现的。下面是这个SpringMVC的目录结构，源码可以下载SpringMVC实例。

 首先要对项目的web.xml进行配置，这个项目的web.xml的内容如下

<?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_2_5.xsd" id="WebApp_ID" version="2.5">  <display-name>springMVC1</display-name>    <welcome-file-list>    <welcome-file>view/login.jsp</welcome-file>  </welcome-file-list>    <context-param>  <param-name>contextConfigLocation</param-name>  <param-value>  classpath:/config/spring/Context.xml  classpath:/config/spring/springDao.xml  </param-value>  </context-param>    <context-param>                       <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/config/log4j.xml</param-value>    </context-param>    <listener>   <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>    <servlet>  <servlet-name>springMVC</servlet-name>  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  <init-param>  <param-name>contextConfigLocation</param-name>  <param-value>/WEB-INF/config/spring-mvc.xml</param-value>  </init-param>  <load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>  <servlet-name>springMVC</servlet-name>  <url-pattern>/</url-pattern>  </servlet-mapping>    <filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param>  </filter>  <filter-mapping>  <filter-name>encodingFilter</filter-name>  <url-pattern>/</url-pattern>  </filter-mapping>    <filter>  <filter-name>openSession</filter-name>  <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>  </filter>  <filter-mapping>  <filter-name>openSession</filter-name>  <url-pattern>/*</url-pattern>  </filter-mapping>  </web-app>

具体的解释可以参照点击这里。

       在完成web.xml的配置后，根据web.xml中的需要的配置文件分别对context.xml(数据库相关的配置)、log4j.xml(日志文件的配置，具体配置解释可以点击这里)、spring-mvc.xml以及springDao.xml的配置。

      其中spring-mvc.xml的配置内容是最基本的springMVC的配置，其内容如下：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:p="http://www.springframework.org/schema/p"   xmlns:mvc="http://www.springframework.org/schema/mvc"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">         <!-- 注解扫描包 --><context:component-scan base-package="com.spri.controller" /><!-- 开启注解 --><mvc:annotation-driven/><!-- 静态资源访问 --> <mvc:resources location="/img/" mapping="/img/**"/>   <mvc:resources location="/js/" mapping="/js/**"/>   <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/"></property><property name="suffix" value=".jsp"></property></bean><mvc:view-controller path="/" view-name="redirect:/user/welcome" /><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  <property name="defaultEncoding" value="utf-8" />      <property name="maxUploadSize" value="10485760000" />      <property name="maxInMemorySize" value="40960" /></bean> </beans>  

         springDao.xml中配置了一些bean，在使用时通过set方法注入到相应的都相中去，下面是本文的基本的bean的配置

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [<!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml">]><beans><bean id="userDao" class="com.spri.dao.impl.UserDaoImpl"><property name="sessionFactory" ref="sessionFactory"></property></bean><bean id="userSerciceImpl" class="com.spri.service.impl.UserServiceImpl"><property name="userDao" ref="userDao"></property></bean><bean id="userManager" parent="transactionBase"><property name="target" ref="userSerciceImpl"></property></bean></beans>

       以上这四个配置文件配置完成后就可以进行前后台的编码工作了。后台分别由controller、dao及其实现、service及其实现以及entity，这些都完成了这个登陆流程中相对简单的实现。

       此例controller中没有对登陆密码进行验证，只是读取数据库中的用户名进行用户名的验证，在spring-mvc.xml中还对springmvc实例的项目登陆的首页进行了设置，contrler的内容如下：

package com.spri.controller;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.omg.IOP.ExceptionDetailMessage;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import com.spri.entity.User;import com.spri.service.UserService;@Controller@RequestMapping("/user")public class UserController {@Resource(name="userSerciceImpl")private UserService userSerciceImpl;  @RequestMapping("/welcome")public String login(){return "/login";}@RequestMapping("/checkLogin")public String checkLogin(User luser, HttpServletRequest request ,HttpSession session){User user = userSerciceImpl.getUser(luser.getUserName());//User user = null;if(user!= null){session.setAttribute("user",user);request.setAttribute("user",user);return "WEB-INF/view/loginMain";}else{return "error";}}@RequestMapping("/loginSuccess")public String loginSuccess(){return "WEB-INF/view/loginMain";}}

登陆首页：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><html><head><script  type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.9.1.js"></script><script  type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.validate.min.js"></script><script  type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.form.min.js"></script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>用户登陆</title><script type="text/javascript">function login(){var form = document.forms[0];form.action="/springMVC/user/checkLogin";form.method="post";form.submit();}</script></head><body><div id="logindlg" class="easyui-dialog" title="登陆"bstyle="width: 400px; height: 200px;"><br><form id="loginform" method="post"><center><table cellspacing="5px;"><tr align="left"><td>用户：</td><td><input  type="text"  name="userName"/></td></tr><tr align="left"><td>密码：</td><td><input type="password" name="passWord" /></td></tr></table><br> <a href="#1"  onclick="login()">登陆</a>      <a href="#2" onclick="user_register()">取消</a></center></form></div></body></html>

登陆效果：

登陆成功后的效果：

由于本人也是在学习的过程中，可能有些地方写的不对，还麻烦大家指正……

资料：

springMVC快速入门指导：http://jeromejaglale.com/doc/spring4_tutorial/mvc_web_application

springMVC和模板，怎么使用模板访问数据：http://www.thymeleaf.org/doc/articles/springmvcaccessdata.html

什么是springMVC的Modelview：http://stackoverflow.com/questions/3423262/what-is-modelattribute-in-spring-mvc

springMVC中的表单和数据模型：http://bitbybitblog.com/forms-and-data-models-in-spring-mvc/

springMVC指导：http://www.mkyong.com/tutorials/spring-mvc-tutorials/