JS倒计时、跳转模块以及JSP中比较日期跳转模块
1，前言
这个是根据网上一些资料重新编写整理而来的，主要是作为自己使用的一个小积累，原本的目的是使网页在规定的时间段内自动跳转，在时间段外的请求不做处理；分别写了JS和JSP的代码，放在这里以备查用；
2，代码
2.1 倒计时模块
这个每隔1秒自动刷新，可以稍作修改以作他用：
[javascript]
<!--倒计时-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script language="JavaScript">
function Dclock()
{
var symbol="3月31日";
var deadline= new Date("03/31/2013 11:25:00"); //标准时间格式
var now = new Date();
var diff = -480 - now.getTimezoneOffset(); //是北京时间和当地时间的时间差
var leave = (deadline.getTime() - now.getTime()) + diff*60000; //getTime()可以取得1970之后的毫秒数，1970年前为负数
var day = Math.floor(leave / (1000 * 60 * 60 * 24)); //天数
var hour = Math.floor(leave / (1000*3600)) - (day * 24);
var minute = Math.floor(leave / (1000*60)) - (day * 24 *60) - (hour * 60);
var second = Math.floor(leave / (1000)) - (day * 24 *60*60) - (hour * 60 * 60) - (minute*60);
if (now.getTime()<deadline.getTime())
{
LiveClock.innerHTML = "现在离"+symbol+"还有"+day+"天"+hour+"小时"+minute+"分"+second +"秒" ;
test.innerHTML= "getTime:"+now.getTime()+"Deadline:"+deadline.getTime();
setTimeout("Dclock()",1000); //调用自身每隔1秒
}
else if (now.getTime()>deadline.getTime())
{
LiveClock.innerHTML = "END";
setTimeout("Dclock()",1000);
}
}
</script>
<!--倒计时-->
<body onload=Dclock()>
<div id= LiveClock></div>
<div id=test></div>
</body>
<!--倒计时-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script language="JavaScript">
function Dclock()
{
var symbol="3月31日";
var deadline= new Date("03/31/2013 11:25:00"); //标准时间格式
var now = new Date();
var diff = -480 - now.getTimezoneOffset(); //是北京时间和当地时间的时间差
var leave = (deadline.getTime() - now.getTime()) + diff*60000; //getTime()可以取得1970之后的毫秒数，1970年前为负数
var day = Math.floor(leave / (1000 * 60 * 60 * 24)); //天数
var hour = Math.floor(leave / (1000*3600)) - (day * 24);
var minute = Math.floor(leave / (1000*60)) - (day * 24 *60) - (hour * 60);
var second = Math.floor(leave / (1000)) - (day * 24 *60*60) - (hour * 60 * 60) - (minute*60);
if (now.getTime()<deadline.getTime())
{
LiveClock.innerHTML = "现在离"+symbol+"还有"+day+"天"+hour+"小时"+minute+"分"+second +"秒" ;
test.innerHTML= "getTime:"+now.getTime()+"Deadline:"+deadline.getTime();
setTimeout("Dclock()",1000); //调用自身每隔1秒
}
else if (now.getTime()>deadline.getTime())
{
LiveClock.innerHTML = "END";
setTimeout("Dclock()",1000);
}
}
</script>
<!--倒计时-->
<body onload=Dclock()>
<div id= LiveClock></div>
<div id=test></div>
</body> 2.2 JS跳转
[javascript]
<!--Javascript begin-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script language="JavaScript">
function Dclock()
{
var deadline= new Date("05/31/2012 20:30:00"); //记时起点
var deadline_2= new Date("05/31/2012 21:30:00"); //记时结束
var symbol="5月31日";
var now = new Date();
if (now.getTime()<deadline.getTime())
{
}
else if (deadline.getTime()<now.getTime()&&now.getTime()<deadline_2.getTime())//C语言写惯了a<b<c了把
{
//alert(now.getTime());
window.location.href="http://localhost/XXX/page.html";
setTimeout("Dclock()",1000);
}
else if (now.getTime()>deadline_2.getTime())
{
}
}
</script>
<Javascript end-->
<!--Javascript begin-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script language="JavaScript">
function Dclock()
{
var deadline= new Date("05/31/2012 20:30:00"); //记时起点
var deadline_2= new Date("05/31/2012 21:30:00"); //记时结束
var symbol="5月31日";
var now = new Date();
if (now.getTime()<deadline.getTime())
{
}
else if (deadline.getTime()<now.getTime()&&now.getTime()<deadline_2.getTime())//C语言写惯了a<b<c了把
{
//alert(now.getTime());
window.location.href="http://localhost/XXX/page.html";
setTimeout("Dclock()",1000);
}
else if (now.getTime()>deadline_2.getTime())
{
}
}
</script>
<Javascript end-->
2.3 JSP代码
由于JS取得是客户端时间，虽然可以通过交互来取得服务器时间，但是显得有些多余，这里贴一下JSP的代码
[java]
<%@ page contentType="text/html; charset=UTF-8" import="java.util.*;" %>
<%//获取当前时间
java.util.Date now=new java.util.Date();
java.util.Date dline=new java.util.Date("03/01/2012 20:30:00");
java.util.Date dline2=new java.util.Date("03/03/2012 21:30:00");
if (now.getTime()<dline.getTime())
{
}
else if (dline.getTime()<now.getTime()&&now.getTime()<dline2.getTime())//C语言写惯了a<b<c了把
{
response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
String newLocn="http://XXX/page/earthhour/";
response.setHeader("Location",newLocn);
}
else if (now.getTime()>dline2.getTime())
{
}
%>
