web.xml完整配置文件帶註釋(已配置錯誤頁)

<?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">
 
 <!-- 配置監聽器 -->
 <listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 
 <!-- 加載spring配置文件 -->
 <context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
 </context-param>
 
 <!-- 配置struts2默認的過濾器 -->
 <filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
 </filter>
 <filter-mapping>
 <filter-name>struts2</filter-name>
 <url-pattern>*.action</url-pattern>
 </filter-mapping>
 <filter-mapping>
 <filter-name>struts2</filter-name>
 <url-pattern>*.jsp</url-pattern>
 </filter-mapping>
 
 <!-- 防止亂碼 -->
 <filter>
 <filter-name>encoding</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>encoding</filter-name>
 <url-pattern>/*</url-pattern>
 </filter-mapping>
 
 <!-- 配置程序默認頁 -->
 <welcome-file-list>
  <welcome-file>/index.jsp</welcome-file>
 </welcome-file-list>
 
 <!-- 配置錯誤頁 -->
  <error-page>
   <error-code>404</error-code>
   <location>/error404.jsp</location>
  </error-page>
   <error-page>
   <error-code>500</error-code>
   <location>/error.jsp</location>
  </error-page>
   <error-page>
   <error-code>503</error-code>
   <location>/error.jsp</location>
  </error-page>
  <error-page>
   <exception-type>java.lang.Exception</exception-type>
   <location>/error.jsp</location>
  </error-page>
 
</web-app>