ssm框架整合配置---web.xml，傻傻分不清楚

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0"    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_3_0.xsd">   <display-name></display-name>       <!-- 404错误拦截 -->  <error-page>    <error-code>404</error-code>    <location>/error404.jsp</location>  </error-page>  <!-- 500错误拦截 -->  <error-page>    <error-code>500</error-code>    <location>/error500.jsp</location>  </error-page>   <!-- 加载spring容器 -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>WEB-INF/classes/spring/applicationContext-*.xml</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>   <!-- 配置前端控制器 -->  <servlet>      <servlet-name>spring</servlet-name>      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>      <init-param>          <!-- ContextconfigLocation配置springmvc加载的配置文件          适配器、处理映射器等           -->          <param-name>contextConfigLocation</param-name>          <param-value>WEB-INF/classes/spring/springmvc.xml</param-value>  </init-param>  </servlet>  <servlet-mapping>      <servlet-name>spring</servlet-name>      <!-- 1、.action访问以.action结尾的  由DispatcherServlet进行解析           2、/,所有访问都由DispatcherServlet进行解析       -->      <url-pattern>/</url-pattern>  </servlet-mapping>   <!-- 解决post乱码问题的过滤器 -->  <filter>      <filter-name>CharacterEncodingFilter</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>  </filter>  <filter-mapping>      <filter-name>CharacterEncodingFilter</filter-name>      <url-pattern>/*</url-pattern>  </filter-mapping>  <welcome-file-list>    <welcome-file>welcome.jsp</welcome-file>  </welcome-file-list> </web-app>