项目中的web.xml基础理解

<?xml version="1.0" encoding="utf-8"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  
  <display-name/>  
  <!--
      www.lekou.com
   -->  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>  
  <!-- SpringMVC核心控制器 -->  
  <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:SpringMVC.xml</param-value>
    </init-param>  
    <load-on-startup>1</load-on-startup>
  </servlet>  
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>  
    <url-pattern>*.action</url-pattern>
  </servlet-mapping>  
  <!-- SpringMVC的编码过滤器 -->  
  <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>  
  <!-- Spring的上下文 -->  
  <context-param>
    <param-name>contextConfigLocation</param-name>  
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param> 
  <!-- Spring的监听器 -->  
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
</web-app>