spring的过滤问题

我使用ssh框架，其中对中文字符过滤式用了spring的CharacterEncodingFilter来过率。十分好用。
但是我在打开页面是发现，这某些页面上的字符串是乱码，而且通常再刷一到2次，就恢复正常。
想问下这是怎么回事？是我的设置的问题吗？
以下是我的相关文件（tomcat6.0,spring3.x,hibernate3.x,struts1.2.x）
web.xml<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <welcome-file-list>
   <welcome-file>index.html</welcome-file>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
<servlet-name>dwr</servlet-name>
<servlet-class>
org.directwebremoting.servlet.DwrServlet
</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dwr</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
  
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>UtilDateConverterInitServlet</servlet-name>
    <servlet-class>com.tonyue.life.web.UtilDateConverterInitServlet</servlet-class>
    <load-on-startup>3</load-on-startup>
  </servlet>  <!-- Standard Action Servlet Mapping -->
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>UtilDateConverterInitServlet</servlet-name>
    <url-pattern>/servlet/UtilDateConverterInitServlet</url-pattern>
  </servlet-mapping>  
 
   <context-param>
   <param-name>contextConfigLocation</param-name>
   <param-value>classpath*:applicationContext-*.xml</param-value>
  </context-param>
   
   <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
   </listener>
   
  <filter>
    <filter-name>Spring character encoding filter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
     <param-name>encoding</param-name>
     <param-value>GBK</param-value>
    </init-param>
  </filter>  <filter-mapping>
    <filter-name>Spring character encoding filter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <filter>
    <filter-name>hibernateFilter</filter-name>
    <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
  </filter>
 <filter-mapping>
    <filter-name>hibernateFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping> 
  
  <filter>
   <filter-name>PageFilter</filter-name>
   <filter-class>com.tonyue.life.web.PageFilter</filter-class>
  </filter>
  <filter-mapping>
   <filter-name>PageFilter</filter-name>
   <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>
[code=HTML]
<%@ page language="java" contentType="text/html; charset=GB18030" pageEncoding="GB18030"%>页面的编码设置为