web.xml

运用过滤器对请求和响应进行替换

<?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">

   <!-- 
   <filter>
        <filter-name>SimpleFilter</filter-name>
        <filter-class>org.sunxin.ch16.filter.SimpleFilter</filter-class>
    </filter>
    
    <filter-mapping>
        <filter-name>SimpleFilter</filter-name>
        <url-pattern>/test.jsp</url-pattern>
    </filter-mapping>
     -->
   	<!-- 
   	<filter>
        <filter-name>LogonFilter</filter-name>
        <filter-class>org.sunxin.ch16.filter.LogonFilter</filter-class>
        
        <init-param>
            <param-name>logon_uri</param-name>
            <param-value>/logon.jsp</param-value>
        </init-param>
        <init-param>
            <param-name>home_uri</param-name>
            <param-value>/home.jsp</param-value>
        </init-param>
    </filter>
    
    <filter-mapping>
        <filter-name>LogonFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
   	 -->
   	 <!-- 
   	<filter>
        <filter-name>CompressionFilter</filter-name>
        <filter-class>org.sunxin.ch16.filter.CompressionFilter</filter-class>
    </filter>
    
    
    <filter-mapping>
        <filter-name>CompressionFilter</filter-name>
        <url-pattern>*.jsp</url-pattern>
        <url-pattern>*.html</url-pattern>
    </filter-mapping>
     -->
   	<filter>
        <filter-name>GuestbookFilter</filter-name>
        <filter-class>org.sunxin.ch16.filter.GuestbookFilter</filter-class>
        <init-param>
            <param-name>word_file</param-name>
            <param-value>/WEB-INF/word.txt</param-value>
        </init-param>
    </filter>
    
    <filter-mapping>
        <filter-name>GuestbookFilter</filter-name>
        <url-pattern>/process.jsp</url-pattern>
    </filter-mapping>
    
     <filter-mapping>
        <filter-name>GuestbookFilter</filter-name>
        <url-pattern>/index.jsp</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>FORWARD</dispatcher>
    </filter-mapping>
   	
</web-app>