JS时间的计算，剩余时间的计算_综合

1.JS求时间差

注意：如果时间自己自己传入参数，要进行转换。比如date2 = new Date(Date.parse(time1))

var date1=new Date();  //开始时间
alert("aa");
var date2=new Date();    //结束时间
var date3=date2.getTime()-date1.getTime()  //时间差的毫秒数//计算出相差天数
var days=Math.floor(date3/(24*3600*1000))//计算出小时数var leave1=date3%(24*3600*1000)    //计算天数后剩余的毫秒数
var hours=Math.floor(leave1/(3600*1000))
//计算相差分钟数
var leave2=leave1%(3600*1000)        //计算小时数后剩余的毫秒数
var minutes=Math.floor(leave2/(60*1000))//计算相差秒数
var leave3=leave2%(60*1000)      //计算分钟数后剩余的毫秒数
var seconds=Math.round(leave3/1000)alert(" 相差 "+days+"天 "+hours+"小时 "+minutes+" 分钟"+seconds+" 秒")

2.显示本站已运行x天x时x分x秒，

稍稍麻烦的就是，要计算两个时间之间的年数差，必须要考虑平年和闰年的问题。
拓展：怎样才是闰年？
需要同时满足两个条件：
1、年份能被4整除；
2、年份若是100的整数倍的话,需被400整除,否则是平年
比如：1900年能被4整除,但是因为其是100的整数倍,却不能被400整除,所以是平年

//初始化时间
//为了提高兼容性注意创建日期的格式，还要添加引号
var start = new Date("2000/12/1");
//把以下内容放到script标签内，创建id为times的div，并开启下面一条语句注释
//show_date_time();function show_date_time(){//周期性调用show_date_time()方法setTimeout("show_date_time()", 1000);var current = new Date();//总秒数var millisecond = Math.floor((current.getTime() - start.getTime())/1000);//总天数var allDay = Math.floor(millisecond/(24*60*60));//注意同getYear的区别var startYear = start.getFullYear();var currentYear = current.getFullYear();//闰年个数var leapYear = 0;for(var i=startYear;i<currentYear;i++){if(isLeapYear(i)){leapYear++;}}//年数var year = Math.floor((allDay - leapYear*366)/365 + leapYear);;//天数var day;if(allDay > 366){day = (allDay - leapYear*366)%365;}else{day = allDay;}//取余数(秒)var remainder = millisecond%(24*60*60);//小时数var hour = Math.floor(remainder/(60*60));//分钟数var minute = Math.floor(remainder%(60*60)/60);//秒数var second = remainder - hour*60*60 - minute*60; var span = "本站已运行" + (year>0 ? (year + "年"):"") + day + "天" + hour + "小时" + minute + "分" + second + "秒" ; document.getElementById("times").innerHTML = span;
}//判断是否是闰年
function isLeapYear(year){if((year%4==0 && year%100!=0)||(year%100==0 && year%400==0)){return true;}return false;
}

 function GetRequest() {//截取浏览器地址栏传的参数var url = decodeURI(location.search); //获取url中"?"符后的字串var theRequest = new Object();if (url.indexOf("?") != -1) {var str = url.substr(1);strs = str.split("&");for (var i = 0; i < strs.length; i++) {theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);}}return theRequest;}var Request = GetRequest();var relateSelect = Request["relateSelect"];$('#relateSelect').val(relateSelect);

获取当前时间包括年月日时分秒。。。可以用在初始化时间控件为默认当天时间范围。

function getNowFormatDate() {var day = new Date();var Year = 0;var Month = 0;var Day = 0;var Hour = 0;var Minute = 0;var Second = 0;var CurrentDate = "";//初始化时间Year = day.getFullYear();Month = day.getMonth() + 1;Day = day.getDate();Hour = day.getHours();Minute = day.getMinutes();Second = day.getSeconds();CurrentDate = CurrentDate + Year + "-";if (Month >= 10) {CurrentDate = CurrentDate + Month + "-";}else {CurrentDate = CurrentDate + "0" + Month + "-";}if (Day >= 10) {CurrentDate = CurrentDate + Day;}else {CurrentDate = CurrentDate + "0" + Day;}if (Hour >= 10) {CurrentDate += " " + Hour;}else {CurrentDate += " 0" + Hour;}if (Minute >= 10) {CurrentDate = CurrentDate + ":" + Minute;}else {CurrentDate = CurrentDate + ":0" + Minute;}if (Second >= 10) {CurrentDate = CurrentDate + ":" + Second;}else {CurrentDate = CurrentDate + ":0" + Second;}return CurrentDate;
}

获取当天开始时间包括年月日时分秒

function getTodayFormatDate() {var day = new Date();var Year = 0;var Month = 0;var Day = 0;var Hour = 0;var Minute = 0;var Second = 0;var CurrentDate = "";//初始化时间Year = day.getFullYear();Month = day.getMonth() + 1;Day = day.getDate();Hour = day.getHours();Minute = day.getMinutes();Second = day.getSeconds();CurrentDate = CurrentDate + Year + "-";if (Month >= 10) {CurrentDate = CurrentDate + Month + "-";}else {CurrentDate = CurrentDate + "0" + Month + "-";}if (Day >= 10) {CurrentDate = CurrentDate + Day;}else {CurrentDate = CurrentDate + "0" + Day;}CurrentDate += " 00";CurrentDate = CurrentDate + ":00";CurrentDate = CurrentDate + ":00";return CurrentDate;
}

格式化时间格式为2018-06-07 15:33

function formatterDateTime(time) {//时间格式转换var date = new Date(time);var y = date.getFullYear();var m = date.getMonth() + 1;m = m < 10 ? ('0' + m) : m;var d = date.getDate();d = d < 10 ? ('0' + d) : d;var h = date.getHours();var minute = date.getMinutes();minute = minute < 10 ? ('0' + minute) : minute;return y + '-' + m + '-' + d + ' ' + h + ':' + minute;}