Spring+SpringMvc+Mybatis整合注意事项

web.xml代码如下

<?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"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>Archetype Created Web Application</display-name>
    <!-- Spring和mybatis的配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mybatis.xml</param-value>
    </context-param>  

    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 防止Spring内存溢出监听器 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>  

    <!-- Spring MVC servlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 这里代表拦截如下两种后缀的请求,如果只写 /，那么代表拦截所有资源 -->
        <url-pattern>*.json</url-pattern>
        <url-pattern>*.jhtml</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>  

</web-app>  

 <!-- 读取spring和shiro配置文件 -->
<!--     <context-param> -->
<!--         <param-name>contextConfigLocation</param-name> -->
<!--         <param-value>classpath:spring-shiro.xml</param-value> -->
<!--     </context-param> -->
    <!-- 设计路径变量值 -->
<!--     <context-param> -->
<!--         <param-name>webAppRootKey</param-name> -->
<!--         <param-value>springmvc.root</param-value> -->
<!--     </context-param> -->

    <!-- shiro过滤器 -->
<!--     <filter> -->
<!--         <filter-name>shiroFilter</filter-name> -->
<!--         <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> -->
<!--         <init-param> -->
<!--             <param-name>targetFilterLifecycle</param-name> -->
<!--             <param-value>true</param-value> -->
<!--         </init-param> -->
<!--     </filter> -->
<!--     <filter-mapping> -->
<!--         <filter-name>shiroFilter</filter-name> -->
<!--         <url-pattern>*.jhtml</url-pattern> -->
<!--         <url-pattern>*.json</url-pattern> -->
<!--     </filter-mapping> -->