JSP动态显示服务器时间跟客户端时间

JSP动态显示服务器时间和客户端时间

server-time.jsp内容如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%
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>

运行效果如图：

JSP动态显示服务器时间跟客户端时间

另外一个JS效果的动态显示当前客户端时间client-time.html，可以通过修改客户端时间查看这两种的区别

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>当前日期</title>
当前时间：
<div  id="time" style="color:red;">
<script>
document.getElementById('time').innerHTML=new Date().toLocaleString()+' 星期'+'日一二三四五六'.charAt(new Date().getDay());
setInterval("document.getElementById('time').innerHTML=new Date().toLocaleString()+' 星期'+'日一二三四五六'.charAt(new Date().getDay());",1000);
</script>
</div>
</body>
</html>

JSP动态显示服务器时间跟客户端时间

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