spring-mvc注解web.xml配置问题

1.web.xml

<?xml version="1.0" encoding="UTF-8"?>  <beans xmlns="http://www.springframework.org/schema/beans"       xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:mvc="http://www.springframework.org/schema/mvc"       xmlns:tx="http://www.springframework.org/schema/tx"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd        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/tx        http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">    //有“<context:component-scan base-package="three.cmd"/>  ”存在的话不用配置下面这句，“<context:component-scan base-package="three.cmd"/>  ”包含了下面这句配置    <mvc:annotation-driven />    <context:component-scan base-package="three.cmd"/>      <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">         <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>     <!-- 支持JSTL -->         <property name="prefix" value="/" />              <!-- 模板的路径 -->         <property name="suffix" value=".jsp" />                <!-- 模板文件的后缀-->      </bean>  </beans>