script language="JavaScript"

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function showTime(){
var div=document.getElementById("timeDiv");
var date=new Date();
var year=date.getFullYear();
var month=date.getMonth()+1;
var day=date.getDate();
var hour=date.getHours();
var minute=date.getMinutes();
var second=date.getSeconds();
div.innerHTML=year+"-"+format(month)+"-"+format(day)+" "+format(hour)+":"+format(minute)+":"+format(second);
}
function format(i){
return i10?"0"+i:i;
}
/script
html
body onload="setInterval(showTime,1000);"/body
/html
div id="timeDiv"div
public?static?void?main(String[]?args)?throws?ParseException?{
//當(dāng)前時(shí)間
Date?now=new?Date();
SimpleDateFormat?sdf=new?SimpleDateFormat("yyyy-MM-dd?HH:mm:ss");
//今年3月5號(hào)10點(diǎn)15分20轉(zhuǎn)成Date類型
Date?old=sdf.parse("2016-03-05?10:15:20");
//計(jì)算時(shí)間差
long?diff=now.getTime()-old.getTime();
long?day=diff/(24*60*60*1000);
long?hour=(diff/(60*60*1000)-day*24);
long?min=((diff/(60*1000))-day*24*60-hour*60);
long?s=(diff/1000-day*24*60*60-hour*60*60-min*60);
System.out.println(""+day+"天"+hour+"小時(shí)"+min+"分"+s+"秒");
}
start用來(lái)記錄開(kāi)始時(shí)間,end用來(lái)記錄程序結(jié)束時(shí)間。那個(gè)for循環(huán)就是模擬你load頁(yè)面的時(shí)間
明白了么?
long start = System.currentTimeMillis();
for(int i = 1; i 10000000; i++){
for(int j = 1; j 100; j++){
}
}
long end = System.currentTimeMillis();
System.out.println("Start time for pgm: " + start);
System.out.println("End time for pgm: " + end);
System.out.println("Total " + (end - start) + " seconds to run the program above");
----------
Start time for pgm: 1291953801885
End time for pgm: 1291953803994
Total 2109 seconds to run the program above
html
head
title當(dāng)前時(shí)間/title
/head
!--將以下代碼加入HTML的Body/Body之間--
script language=JavaScript
var timerID = null;
var timerRunning = false;
function stopclock (){
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;}
function startclock () {
stopclock();
showtime();}
function showtime () {
var now = new Date();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
var timeValue = "" +((hours = 12) ? "下午 " : "上午 " )
timeValue += ((hours 12) ? hours -12 :hours)
timeValue += ((minutes 10) ? ":0" : ":") + minutes
timeValue += ((seconds 10) ? ":0" : ":") + seconds
document.clock.thetime.value = timeValue;
timerID = setTimeout("showtime()",1000);
timerRunning = true;}
/SCRIPT
body onload=startclock()
form name=clock
input name=thetime style="font-size: 9pt;color:#000000;border:0px none; " size=12
/form
/body/html
下面這個(gè)javascript是每秒顯示一次時(shí)間,你只需要把下面的showTime()函數(shù)里面程序一修改就可以得到你想要的結(jié)果了
setInterval("showTime()", 1000);
function showTime()
{
var today = new Date();
alert("The time is: " + today.toString());
} 答案補(bǔ)充 setInterval("showTime()", 1000);
function showTime()
{
//你把這個(gè)時(shí)間變成你想要的就可以了啊,然后每過(guò)一秒時(shí)間就加一秒
var today = new Date(2008,11,30,11,20,45);
alert("The time is: " + today.toString());
} 答案補(bǔ)充 獲取日期的時(shí)間方法
getYear(): 返回年數(shù)
getMonth():返回當(dāng)月號(hào)數(shù)
getDate(): 返回當(dāng)日號(hào)數(shù)
getDay():返回星期幾
getHours():返回小時(shí)數(shù)
getMintes(:返回分鐘數(shù)
getSeconds():返回秒數(shù)
getTime() : 返回毫秒數(shù)
設(shè)置日期和時(shí)間:
setYear();設(shè)置年
setDate():設(shè)置當(dāng)月號(hào)數(shù)
setMonth():設(shè)置當(dāng)月份數(shù)
setHours():設(shè)置小時(shí)數(shù)
setMintes():設(shè)置分鐘數(shù)
setSeconds():設(shè)置秒數(shù)
setTime ():設(shè)置毫秒數(shù)
例子:
var d = new Date("2008/11/30");
d.setMonth(d.getMonth() + 1 + 1);//加一個(gè)月,同理,可以加一天:getDate()+1,加一年:getYear()+1
當(dāng)前題目:網(wǎng)頁(yè)時(shí)間代碼java 網(wǎng)頁(yè)時(shí)間代碼
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