JS倒計時、跳轉模組以及JSP中比較日期跳轉模組

最後更新：2018-12-03 來源：互聯網

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1，前言

這個是根據網上一些資料重新編寫整理而來的，主要是作為自己使用的一個小積累，原本的目的是使網頁在規定的時間段內自動跳轉，在時間段外的請求不做處理；分別寫了JS和JSP的代碼，放在這裡以備查用；

2，代碼

2.1 倒計時模組

這個每隔1秒自動重新整理，可以稍作修改以作他用：

<!--倒計時-->  <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"); //標準時間格式var now = new Date();var diff = -480 - now.getTimezoneOffset(); //是北京時間和當地時間的時間差  var leave = (deadline.getTime() - now.getTime()) + diff*60000; //getTime()可以取得1970之後的毫秒數，1970年前為負數var day = Math.floor(leave / (1000 * 60 * 60 * 24));  //天數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 = "現在離"+symbol+"還有"+day+"天"+hour+"小時"+minute+"分"+second +"秒"  ;test.innerHTML= "getTime:"+now.getTime()+"Deadline:"+deadline.getTime();setTimeout("Dclock()",1000); //調用自身每隔1秒 }  else if (now.getTime()>deadline.getTime()){LiveClock.innerHTML = "END";setTimeout("Dclock()",1000);}}  </script>  <!--倒計時-->  <body onload=Dclock()>  <div id= LiveClock></div>  <div id=test></div></body>

2.2 JS跳轉

<!--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"); //記時起點var deadline_2= new Date("05/31/2012 21:30:00"); //記時結束    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語言寫慣了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代碼

由於JS取得是用戶端時間，雖然可以通過互動來取得伺服器時間，但是顯得有些多餘，這裡貼一下JSP的代碼

<%@ page contentType="text/html; charset=UTF-8" import="java.util.*;" %><%//擷取目前時間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語言寫慣了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()){}%>

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