javascript获取服务器和客户端时间
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'test.jsp' starting page</title>
<script language="javascript" type="text/javascript">
//因程序执行耗费时间,所以时间并不十分准确,误差大约在2000毫秒以下
var xmlHttp = false;
//获取服务器时间
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
xmlHttp.open("GET", "null.txt", false);
xmlHttp.setRequestHeader("Range", "bytes=-1");
xmlHttp.send(null);
severtime=new Date(xmlHttp.getResponseHeader("Date"));
//获取服务器日期
var year=severtime.getFullYear();
var month=severtime.getMonth()+1;
var date=severtime.getDate();
//获取服务器时间
var hour=severtime.getHours();
var minu=severtime.getMinutes();
var seco=severtime.getSeconds();
//获取客户端时间
localtime=new Date();
//取得时间差
var jtime=Math.abs(localtime.getTime()-severtime.getTime());
var jdate=jtime/(24*60*60*1000);
var jhour=jtime%(24*60*60*1000)/(60*60*1000);
var jminu=jtime%(24*60*60*1000)%(60*60*1000)/(60*1000);
var jsecond=jtime%(24*60*60*1000)%(60*60*1000)%(60*1000)/1000;
//格式化输出客户端时间
function getClientTime(){
localtime=new Date();
var cyear=localtime.getFullYear();
var cmonth=localtime.getMonth()+1;
var cdate=localtime.getDate();
var chour=localtime.getHours();
var cminu=localtime.getMinutes();
var cseco=localtime.getSeconds();
ccyear=addZero(cyear);
ccmonth=addZero(cmonth);
ccdate=addZero(cdate);
cchour=addZero(chour);
ccminu=addZero(cminu);
ccseco=addZero(cseco);
cinnerdata="当前客户端时间：";
document.getElementById("clienttime").innerHTML=cinnerdata+ccyear+"-"+ccmonth+"-"+ccdate+" "+cchour+":"+ccminu+":"+ccseco;
document.getElementById('xctime').innerHTML="时间相差："+Math.round(jdate)+"天"+Math.round(jhour)+"小时"+Math.round(jminu)+"分钟"+jsecond+"秒 总计:"+jtime+"毫秒";
}
//格式化输出服务器时间
function getSeverTime(){
seco++;
if(seco==60){
minu+=1;
seco=0;
}
if(minu==60){
hour+=1;
minu=0;
}
if(hour==24){
date+=1;
hour=0;
}
//日期处理
if(month==1||month==3||month==5||month==7
||month==8||month==10||month==12)
{
if(date==32)
{
date=1;
month+=1;
}
}else if(month==4||month==6||month==9||month==11){
if(date==31){
date=1;
month+=1;
}
}else if(month==2){
if(year%4==0&&year%100!=0){//闰年处理
if(date==29){
date=1;
month+=1;
}
}else{
if(date==28){
date=1;
month+=1;
}
}
}
if(month==13){
year+=1;
month=1;
}
sseco=addZero(seco);
sminu=addZero(minu);
shour=addZero(hour);
sdate=addZero(date);
smonth=addZero(month);
syear=year;
innerdata="当前服务器时间：";
document.getElementById("servertime").innerHTML=innerdata+syear+"-"+smonth+"-"+sdate+" "+shour+":"+sminu+":"+sseco;
setTimeout("getSeverTime()",1000);
setTimeout("getClientTime()",100);
}
function addZero(num) {
num=Math.floor(num);
return ((num <= 9) ? ("0" + num) : num);
}
</script>
</head>
<body onload="getSeverTime();">
<p id="servertime"></p>
<p id="clienttime"></p>
<p id="xctime"></p>
</body>
</html>
转：http://hi.baidu.com/study_discuss/blog/item/6d20cdca013b5d4cf31fe7aa.html