Spring MVC简例

applicationContext.xml的配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans
 xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
 <!-- spring MVC中Action使用的配置-->   <!-- Action类可继承ActionController实现基本页面跳转-->

                                                   <!-- Action类可继承SimpleFormController实现接收表单后的跳转-->

 <bean name="/hbtAccount.html" class="hibntTest4.action.AccountAction"></bean>
 <bean name="/hbtInfoSet.html" class="hibntTest4.action.InfoSetAction">

<!-- 配置接收表单的类-->
  <property name="commandClass">
   <value>hibntTest4.domain.User</value>
  </property>
 </bean>

</beans>

web.xml配置如下：

<?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">
 <servlet>
  <servlet-name>SpringDispatcher</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>applicationContext.xml的位置，例如：/WEB-INF/applicationContext.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>SpringDispatcher</servlet-name>
  <url-pattern>*.html</url-pattern> 
 </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

Action书写如下：

public class AccountAction extends AbstractController{

 @Override
 protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception {
  return new ModelAndView("/WEB-INF/hibnt4/account.jsp");
 } 
}

InfoSetAction书写如下
public class InfoSetAction extends SimpleFormController{
 @Override
 protected ModelAndView onSubmit(Object form) throws Exception {

//接收来自页面传来的表单信息，并自动封装为User类型的对象
  User u=(User)form;

//根据用户名查找数据库得到用户信息
  User user=((UserDao)ACUtil.getAC().getBean("userDao")).findByName(u.getUsername());
  if(user!=null){
   if(user.getPassword().equals(u.getPassword())){

//如果用户名和密码都正确，返回用户信息，可通过EL表达试得到相应值，如:${user.username }
    return new ModelAndView("/WEB-INF/hibnt4/showInfo.jsp","user",user);
   }else{

//如果用户名存在，但密码不正确,返回到登录页面，并告知错误信息
    return new ModelAndView("/WEB-INF/hibnt4/account.jsp","error","用户名或密码不正确！");
   }
  }else{

//如果用户不存在，进入注册页面，可以显示用户名。
   return new ModelAndView("/WEB-INF/hibnt4/infoSet.jsp","user",u);
  }
 } 
}