设置不使用缓存的过滤器（ClearCacheFilter）

功能描述

        将HTTP响应头信息中的缓存参数设置为不进行缓存。

使用方法

        在 java web 项目的 web.xml 文件中添加如下代码。

<!--设置不使用缓存的过滤器配置  开始 -->

<filter>

 <filter-name>ClearCacheFilter</filter-name>

 <filter-class>com.hmw.filter.ClearCacheFilter</filter-class>

</filter>

 

<filter-mapping>

 <filter-name>ClearCacheFilter</filter-name>

 <url-pattern>*.do</url-pattern>

</filter-mapping>

<filter-mapping>

 <filter-name>ClearCacheFilter</filter-name>

 <url-pattern>*.jsp</url-pattern>

</filter-mapping>

<!--设置不使用缓存的过滤器配置  结束 -->

过滤器源码

package com.hmw.filter;

 

import java.io.IOException;

 

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletResponse;

 

/**

 * 使浏览器不缓存页面信息的过滤器<br>

 */

public class ClearCacheFilter implements Filter {

 

    @Override

    public void init(FilterConfig filterConfig) throws ServletException {

    }

 

    @Override

    public void doFilter(ServletRequest request, ServletResponse response,

            FilterChain filterChain) throws IOException, ServletException {

        HttpServletResponse httpResponse = (HttpServletResponse) response;

        httpResponse.setHeader("Cache-Control", "no-cache");

        httpResponse.setHeader("Pragma", "no-cache");

        httpResponse.setDateHeader("Expires", -1);

        filterChain.doFilter(request, response);

    }

 

    @Override

    public void destroy() {

    }

}