在JSP中加入以下代码
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%?
????? String url = basePath+"login.jsp";?? //设置跳转的地址
%><html>
????????? ?<head>????????????
?? <meta http-equiv=refresh content=5;url=<%=url %>>???????????
?????????? </head>?
?????? <body >??????????????
<b style=color:blue><span id=jump>5</span> 秒钟后页面将自动返回登录页面...</b>?????
???? ?</body>
</html>????????
?????? ?<script>
????????????????????? function countDown(secs){
?????????????????????????? jump.innerText=secs;
?????????????????????????? if(--secs>0)
??????????????????????????????????? setTimeout("countDown("+secs+" )",1000);
??????????????????? }
???????????????????? countDown(5);
?????? </script>
