package OSChina;

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;

/** * 用于的使 Browser 不缓存页面的过滤器 */ public class FilterDemoTwo implements Filter{

 @Override

 public void destroy() {

 }

 @Override

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

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

     ((HttpServletResponse) response).setHeader("Pragma","no-cache");      ((HttpServletResponse) response).setDateHeader ("Expires", -1);      filterChain.doFilter(request, response);

 }

 @Override

 public void init(FilterConfig filterconfig) throws ServletException {

 }

}