基于注解的Spring MVC的从零单建(简略版)

网上关于此教程各种版本，太多太多了，因为我之前没搭过框架，最近带着两个实习生，为了帮他们搭框架，我只好。。。惭愧啊。。。基本原理的话各位自己了解下，表示我自己从来没研究过Spring的源码，所以工作了一年多还是在写代码。。。

下面直接正题，怎么搭建

我的Project目录结构，jsp在web-inf目录，js之类的在webroot根目录。

1.配置web.xml

SpringMVC是一个基于DispatcherServlet的MVC框架，每一个请求最先访问的都是DispatcherServlet，DispatcherServlet负责转发每一个Request请求给相应的Handler，Handler处理以后再返回相应的视图(View)和模型(Model)，返回的视图和模型都可以不指定，即可以只返回Model或只返回View或都不返回。DispatcherServlet是继承自HttpServlet的，既然SpringMVC是基于DispatcherServlet的，那么我们先来配置一下DispatcherServlet。

 <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5"      xmlns="http://java.sun.com/xml/ns/javaee"      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee      http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">     <display-name>sy</display-name>      <servlet>      <servlet-name>dispatcherServlet</servlet-name>      <servlet-class>             org.springframework.web.servlet.DispatcherServlet         </servlet-class>     <init-param>       <param-name>contextConfigLocation</param-name>       <param-value>classpath*:/main/config/applicationContext.xml,classpath*:/main/config/springmvc-servlet.xml</param-value>     </init-param>     <load-on-startup>1</load-on-startup>   </servlet>   <servlet-mapping>     <servlet-name>dispatcherServlet</servlet-name>     <url-pattern>*.html</url-pattern>   </servlet-mapping>   <welcome-file-list>     <welcome-file>index.jsp</welcome-file>   </welcome-file-list> </web-app> 

2.配置springmvc-servlet.xml，看注解。

 <?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"     xmlns:util="http://www.springframework.org/schema/util"     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-3.0.xsd                 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd                 http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">           <!-- 对web包中的Controller进行扫描，以完成Bean创建和自动依赖注入的功能 -->     <context:component-scan base-package="main.java.com.sy.controller"/>      <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->     <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>      <!--对模型视图名称的解析，即在模型视图名称添加前后缀 -->     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/pages/" p:suffix=".jsp"/>     </beans> 

3.配置applicationContext.xml,扫描entity，service，dao的注解，其他的就不需要扫描，解析数据库properties文件，配置事务，和之前的Spring配置一样

 <?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:aop="http://www.springframework.org/schema/aop"     xmlns:tx="http://www.springframework.org/schema/tx"     xmlns:context="http://www.springframework.org/schema/context"     xsi:schemaLocation=" http://www.springframework.org/schema/beans  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop  http://www.springframework.org/schema/aop/spring-aop-3.0.xsd   http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-3.0.xsd ">    <context:component-scan base-package="main.java.com.sy.service"></context:component-scan>   <context:component-scan base-package="main.java.com.sy.dao"></context:component-scan>   <context:component-scan base-package="main.java.com.sy.bean"></context:component-scan>      <context:property-placeholder location="classpath*:/main/config/application.properties" />     <!-- 支持aop注解 -->     <aop:aspectj-autoproxy />      <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">               <property name="driverClassName" value="${jdbc.driverClass}"></property>               <property name="url" value="${jdbc.url}"></property>               <property name="username" value="${jdbc.user}"></property>               <property name="password" value="${jdbc.password}"></property>     </bean>       <bean id="sessionFactory"          class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">              <property name="dataSource">                  <ref bean="dataSource" />              </property>            <property name="hibernateProperties">                  <props>                    <prop key="hibernate.dialect">${hibernate.dialect}</prop>                      <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>                    <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>                </props>            </property>         <property name="packagesToScan">             <value>main.java.com.sy.entity</value>         </property>    </bean>    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate" >     <property name="sessionFactory" ref="sessionFactory"></property> </bean>   <bean id="jdbcTemplate"  class="org.springframework.jdbc.core.JdbcTemplate">         <property name="dataSource" ref="dataSource"/>    </bean>   <!-- 配置事务管理 -->     <bean id="hibernateTransactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" >         <property name="sessionFactory" ref="sessionFactory"></property>     </bean>     <tx:annotation-driven transaction-manager="hibernateTransactionManager" />     <aop:config>          <aop:pointcut expression="execution(* main.java.com.sy.service.impl.*.*(..))" id="businessService"/>          <aop:advisor advice-ref="txAdvice" pointcut-ref="businessService" />      </aop:config>       <tx:advice id="txAdvice" transaction-manager="hibernateTransactionManager">         <tx:attributes>             <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="delet*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="save*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="create*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="merge*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="revoke*" propagation="REQUIRED" rollback-for="Exception"/>             <tx:method name="*" propagation="SUPPORTS"/>         </tx:attributes>     </tx:advice>  </beans> 

4.配置application.properties

 #jdbc jdbc.driverClass=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/sy jdbc.user=root jdbc.password=root  #hibernate hibernate.dialect=org.hibernate.dialect.MySQLDialect hibernate.show_sql=true hibernate.hbm2ddl.auto=update 

5.默认是进index.jsp页面，但是我们不可以直接访问，所以呢，做点修改。

 <html>   <head>   </head>     <body>     <script type="text/javascript">                 top.window.location.replace("login.html");     </script>   </body> </html> 

6.如何才能进入这个页面呢，我们来写个Controller方法

UserController.java

 @Controller public class UserController {              @RequestMapping(value = "/login.html")     public String login(HttpServletRequest request,HttpServletResponse reponse) throws Exception{         return "user/login";     }     } 

7.因为我们想默认进一个登录页面，方法有了跳转，页面建立一下。

 <form action="success.html" name="loginform" accept-charset="utf-8" id="login_form" class="loginForm" method="post">      <label class="input-tips" for="u">帐号：</label>          <input type="text" id="accounName" name="accounName" class="inputstyle" placeholder="输入用户名/登录名"/>      <label class="input-tips" for="p">密码：</label>                      <input type="password" id="loginPassword" name="loginPassword" class="inputstyle" placeholder="输入密码" autocomplete="off"/>                   <input type="button" id="login_button" value="登 录" style="width:150px;" class="button_blue"/> </form> 

8.进入页面之后，我们需要判断正确性咯，在UserController加个success方法。

 @RequestMapping(value = "/success.html") public String success(HttpServletRequest request,HttpServletResponse reponse){     String msg ="add successfully";     request.setAttribute("msg", msg);     return "user/sucess"; } 

9.测试msg页面很简单，一个el表达式搞定

 <html>   <head>   </head>   <body>    msg=${msg }   </body> </html> 

关于详细的源码， 源码下载地址 （提取码：48f0），可以直接运行，多余的jar包大家酌情删除，由于完稿仓促，很多细节没有写好，源码我最近也重新修改了，我会尽快完善的。

有问题的同学可以加我企鹅：四零一二七六