静态资源和动态资源进行不同的缓存处理,代码如下：====NO2判段是否以jsp结尾 处
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.HttpServletRequest;import javax.servlet.http.HttpServletResponse;//禁止浏览器缓存动态资源，例如JSP资源public class FilterDemo5 implements Filter { ???//思路 ???private FilterConfig filterConfig; ???public void init(FilterConfig filterConfig) throws ServletException { ???????this.filterConfig = filterConfig; ???} ???public void doFilter(ServletRequest req, ServletResponse res,FilterChain chain) throws IOException, ServletException { ???????//NO将父子接口强转 ???????HttpServletRequest request = (HttpServletRequest) req; ???????HttpServletResponse response = (HttpServletResponse) res; ???????//NO1取得客户端访问的资源的URI，形式/day04/login.jsp ???????//http: ???????String uri = request.getRequestURI(); ???????//静态资源和动态资源进行不同的缓存处理,代码如下： ???????//NO2判段是否以jsp结尾，即动态资源 ???????if(uri!=null && uri.endsWith("jsp")){ ???????????//NO3如果是动态资源，设置三个响应头通知浏览器不缓存 ???????????response.setHeader("expires","-1"); ???????????response.setHeader("cache-control","no-cache"); ???????????response.setHeader("pragma","no-cache"); ???????}else if(uri!=null && uri.endsWith("html")){ ???????????//NO4如果是静态资源，缓存一定的时间 ???????????String strHtml = filterConfig.getInitParameter("html"); ???????????long time = System.currentTimeMillis()+Integer.parseInt(strHtml)*1000; ???????????//time为毫秒值 ???????????response.setDateHeader("expires",time); ???????????response.setHeader("cache-control",time/1000+""); ???????????response.setHeader("pragma",time/1000+""); ???????} ???????//NO5放行资源 ???????chain.doFilter(request,response); ???} ???public void destroy() { ???}}Filter 禁止浏览器缓存动态资源，例如JSP资源 -学习笔记
原文地址：http://blog.51cto.com/357712148/2105116