public class BrowserNoCacheFilter implements Filter {

     public void init(FilterConfig filterconfig) throws ServletException {

     }

     public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterchain) throws IOException, ServletException {

         ((HttpServletResponse) response).setHeader("Cache-Control", "no-cache");      //HTTP消息头，控制网页的缓存

         ((HttpServletResponse) response).setHeader("Pragma", "no-cache");        //禁止浏览器从缓存中调阅页面内容

         ((HttpServletResponse) response).setHeader("Expires", "-1");                   //指定网页在缓存中的过期时间

         filterchain.doFilter(request, response);

     }

     public void destroy() {

     }

 }