js獲取當前時間並做一些操作（對時間格式化，moment.js）

這個博主寫的挺全的，需要的可以參考一下

1.代碼

//Js獲取當前日期時間及其它操作
var myDate = new Date();
myDate.getYear(); //獲取當前年份(2位)
myDate.getFullYear(); //獲取完整的年份(4位,1970-????)
myDate.getMonth(); //獲取當前月份(0-11,0代表1月)
myDate.getDate(); //獲取當前日(1-31)
myDate.getDay(); //獲取當前星期X(0-6,0代表星期天)
myDate.getTime(); //獲取當前時間(從1970.1.1開始的毫秒數)
myDate.getHours(); //獲取當前小時數(0-23)
myDate.getMinutes(); //獲取當前分鐘數(0-59)
myDate.getSeconds(); //獲取當前秒數(0-59)
myDate.getMilliseconds(); //獲取當前毫秒數(0-999)
myDate.toLocaleDateString(); //獲取當前日期
var mytime = myDate.toLocaleTimeString(); //獲取當前時間
myDate.toLocaleString(); //獲取日期與時間

//日期時間腳本庫方法列表

Date.prototype.isLeapYear //判斷閏年
Date.prototype.Format //日期格式化
Date.prototype.DateAdd //日期計算
Date.prototype.DateDiff //比較日期差
Date.prototype.toString //日期轉字符串
Date.prototype.toArray //日期分割爲數組
Date.prototype.DatePart //取日期的部分信息
Date.prototype.MaxDayOfDate //取日期所在月的最大天數
Date.prototype.WeekNumOfYear //判斷日期所在年的第幾周
StringToDate //字符串轉日期型
IsValidDate //驗證日期有效性
CheckDateTime //完整日期時間檢查
daysBetween //日期天數差

//js代碼：

//---------------------------------------------------  
// 判斷閏年  
//---------------------------------------------------  
Date.prototype.isLeapYear = function() {
	return(0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this.getYear() % 400 == 0)));
}

//---------------------------------------------------  
// 日期格式化  
// 格式 YYYY/yyyy/YY/yy 表示年份  
// MM/M 月份  
// W/w 星期  
// dd/DD/d/D 日期  
// hh/HH/h/H 時間  
// mm/m 分鐘  
// ss/SS/s/S 秒  
//---------------------------------------------------  
Date.prototype.Format = function(formatStr) {
	var str = formatStr;
	var Week = ['日', '一', '二', '三', '四', '五', '六'];

	str = str.replace(/yyyy|YYYY/, this.getFullYear());
	str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));

	str = str.replace(/MM/, this.getMonth() > 9 ? this.getMonth().toString() : '0' + this.getMonth());
	str = str.replace(/M/g, this.getMonth());

	str = str.replace(/w|W/g, Week[this.getDay()]);

	str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
	str = str.replace(/d|D/g, this.getDate());

	str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
	str = str.replace(/h|H/g, this.getHours());
	str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
	str = str.replace(/m/g, this.getMinutes());

	str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
	str = str.replace(/s|S/g, this.getSeconds());

	return str;
}

//+---------------------------------------------------  
//| 求兩個時間的天數差 日期格式爲 YYYY-MM-dd   
//+---------------------------------------------------  
function daysBetween(DateOne, DateTwo) {
	var OneMonth = DateOne.substring(5, DateOne.lastIndexOf('-'));
	var OneDay = DateOne.substring(DateOne.length, DateOne.lastIndexOf('-') + 1);
	var OneYear = DateOne.substring(0, DateOne.indexOf('-'));

	var TwoMonth = DateTwo.substring(5, DateTwo.lastIndexOf('-'));
	var TwoDay = DateTwo.substring(DateTwo.length, DateTwo.lastIndexOf('-') + 1);
	var TwoYear = DateTwo.substring(0, DateTwo.indexOf('-'));

	var cha = ((Date.parse(OneMonth + '/' + OneDay + '/' + OneYear) - Date.parse(TwoMonth + '/' + TwoDay + '/' + TwoYear)) / 86400000);
	return Math.abs(cha);
}

//+---------------------------------------------------  
//| 日期計算  
//+---------------------------------------------------  
Date.prototype.DateAdd = function(strInterval, Number) {
	var dtTmp = this;
	switch(strInterval) {
		case 's':
			return new Date(Date.parse(dtTmp) + (1000 * Number));
		case 'n':
			return new Date(Date.parse(dtTmp) + (60000 * Number));
		case 'h':
			return new Date(Date.parse(dtTmp) + (3600000 * Number));
		case 'd':
			return new Date(Date.parse(dtTmp) + (86400000 * Number));
		case 'w':
			return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
		case 'q':
			return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
		case 'm':
			return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
		case 'y':
			return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
	}
}

//+---------------------------------------------------  
//| 比較日期差 dtEnd 格式爲日期型或者有效日期格式字符串  
//+---------------------------------------------------  
Date.prototype.DateDiff = function(strInterval, dtEnd) {
	var dtStart = this;
	if(typeof dtEnd == 'string') //如果是字符串轉換爲日期型  
	{
		dtEnd = StringToDate(dtEnd);
	}
	switch(strInterval) {
		case 's':
			return parseInt((dtEnd - dtStart) / 1000);
		case 'n':
			return parseInt((dtEnd - dtStart) / 60000);
		case 'h':
			return parseInt((dtEnd - dtStart) / 3600000);
		case 'd':
			return parseInt((dtEnd - dtStart) / 86400000);
		case 'w':
			return parseInt((dtEnd - dtStart) / (86400000 * 7));
		case 'm':
			return(dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart.getMonth() + 1);
		case 'y':
			return dtEnd.getFullYear() - dtStart.getFullYear();
	}
}

//+---------------------------------------------------  
//| 日期輸出字符串，重載了系統的toString方法  
//+---------------------------------------------------  
Date.prototype.toString = function(showWeek) {
	var myDate = this;
	var str = myDate.toLocaleDateString();
	if(showWeek) {
		var Week = ['日', '一', '二', '三', '四', '五', '六'];
		str += ' 星期' + Week[myDate.getDay()];
	}
	return str;
}

//+---------------------------------------------------  
//| 日期合法性驗證  
//| 格式爲：YYYY-MM-DD或YYYY/MM/DD  
//+---------------------------------------------------  
function IsValidDate(DateStr) {
	var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); //去兩邊空格;   
	if(sDate == '') return true;
	//如果格式滿足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換爲''   
	//數據庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),數據庫會自動轉換爲YYYY-MM-DD格式   
	var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g, '');
	if(s == '') //說明格式滿足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D   
	{
		var t = new Date(sDate.replace(/\-/g, '/'));
		var ar = sDate.split(/[-/:]/);
		if(ar[0] != t.getYear() || ar[1] != t.getMonth() + 1 || ar[2] != t.getDate()) {
			//alert('錯誤的日期格式！格式爲：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');   
			return false;
		}
	} else {
		//alert('錯誤的日期格式！格式爲：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');   
		return false;
	}
	return true;
}

//+---------------------------------------------------  
//| 日期時間檢查  
//| 格式爲：YYYY-MM-DD HH:MM:SS  
//+---------------------------------------------------  
function CheckDateTime(str) {
	var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
	var r = str.match(reg);
	if(r == null) return false;
	r[2] = r[2] - 1;
	var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
	if(d.getFullYear() != r[1]) return false;
	if(d.getMonth() != r[2]) return false;
	if(d.getDate() != r[3]) return false;
	if(d.getHours() != r[4]) return false;
	if(d.getMinutes() != r[5]) return false;
	if(d.getSeconds() != r[6]) return false;
	return true;
}

//+---------------------------------------------------  
//| 把日期分割成數組  
//+---------------------------------------------------  
Date.prototype.toArray = function() {
	var myDate = this;
	var myArray = Array();
	myArray[0] = myDate.getFullYear();
	myArray[1] = myDate.getMonth();
	myArray[2] = myDate.getDate();
	myArray[3] = myDate.getHours();
	myArray[4] = myDate.getMinutes();
	myArray[5] = myDate.getSeconds();
	return myArray;
}

//+---------------------------------------------------  
//| 取得日期數據信息  
//| 參數 interval 表示數據類型  
//| y 年 m月 d日 w星期 ww周 h時 n分 s秒  
//+---------------------------------------------------  
Date.prototype.DatePart = function(interval) {
	var myDate = this;
	var partStr = '';
	var Week = ['日', '一', '二', '三', '四', '五', '六'];
	switch(interval) {
		case 'y':
			partStr = myDate.getFullYear();
			break;
		case 'm':
			partStr = myDate.getMonth() + 1;
			break;
		case 'd':
			partStr = myDate.getDate();
			break;
		case 'w':
			partStr = Week[myDate.getDay()];
			break;
		case 'ww':
			partStr = myDate.WeekNumOfYear();
			break;
		case 'h':
			partStr = myDate.getHours();
			break;
		case 'n':
			partStr = myDate.getMinutes();
			break;
		case 's':
			partStr = myDate.getSeconds();
			break;
	}
	return partStr;
}

//+---------------------------------------------------  
//| 取得當前日期所在月的最大天數  
//+---------------------------------------------------  
Date.prototype.MaxDayOfDate = function() {
	var myDate = this;
	var ary = myDate.toArray();
	var date1 = (new Date(ary[0], ary[1] + 1, 1));
	var date2 = date1.dateAdd(1, 'm', 1);
	var result = dateDiff(date1.Format('yyyy-MM-dd'), date2.Format('yyyy-MM-dd'));
	return result;
}

//+---------------------------------------------------  
//| 取得當前日期所在周是一年中的第幾周  
//+---------------------------------------------------  
Date.prototype.WeekNumOfYear = function() {
	var myDate = this;
	var ary = myDate.toArray();
	var year = ary[0];
	var month = ary[1] + 1;
	var day = ary[2];
	document.write('< script language=VBScript\> \n');
	document.write('myDate = Datue('
		'+month+' - '+day+' - '+year+'
		') \n');
	document.write('result = DatePart('
		ww ', myDate) \n');
	document.write(' \n');
	return result;
}

//+---------------------------------------------------  
//| 字符串轉成日期類型   
//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd  
//+---------------------------------------------------  
function StringToDate(DateStr) {

	var converted = Date.parse(DateStr);
	var myDate = new Date(converted);
	if(isNaN(myDate)) {
		//var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';  
		var arys = DateStr.split('-');
		myDate = new Date(arys[0], --arys[1], arys[2]);
	}
	return myDate;
}

//若要顯示:當前日期加時間(如:2009-06-12 12:00)

function CurentTime() {
	var now = new Date();

	var year = now.getFullYear(); //年
	var month = now.getMonth() + 1; //月
	var day = now.getDate(); //日

	var hh = now.getHours(); //時
	var mm = now.getMinutes(); //分

	var clock = year + "-";

	if(month < 10)
		clock += "0";

	clock += month + "-";

	if(day < 10)
		clock += "0";

	clock += day + " ";

	if(hh < 10)
		clock += "0";

	clock += hh + ":";
	if(mm < 10) clock += '0';
	clock += mm;
	return(clock);
}

2.說明：

2.1轉自地址：https://www.cnblogs.com/carekee/articles/1678041.html

2.2 推薦一個時間格式處理開源庫：

http://momentjs.cn/