response.setContentType("text/html;charset=UTF-8");
/*response.setIntHeader("refresh", 1);//设置1秒钟刷新一次
Random r = new Random();
response.getWriter().write(r.nextInt()+"");*/
response.getWriter().write("注册成功!3秒钟跳到主页");
//设置3秒钟跳转
response.setHeader("refresh", "3;url=/day09_00_HttpServletResponse/servlet/demo6");
//告诉客户端不使用缓存
response.setHeader("pragma", "no-cache");
response.setHeader("cache-control", "no-cache");
response.setIntHeader("expires", 0);