设置不使用缓存的过滤器(ClearCacheFilter)
本系列文章导读:
设置站点黑名单的过滤器(BannedAccessFilter)
将响应数据进行压缩处理的过滤器(CompressionFilter)
替换禁用语(指定关键字)的过滤器(StopWordsFilter)
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
* 创建日期:2012-01-10 * * @author 何明旺 */ 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() { } }