如何獲取當前的日期和時間

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(); //獲取當前分鍾數(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
//獲取當前時間是本年的第幾周
var weekofyear =  (((new Date())-(new Date("2017-01-01")))/(24*60*60*7*1000)|0) +1;
this.week = weekofyear;
//獲取當前月份
var woDate = new Date();
var month = woDate.getMonth()+1;
this.month = (month<10 ? "0"+month:month);

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 日期分割為數組
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 分鍾
// 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 日期格式為
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
格式為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'
)//如果是字符串轉換為日期型

{
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
//|
格式為：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就替換為''

//數據庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),數據庫會自動轉換為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！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');

return false;

}

}

else

{

//alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');

return false;

}
return
true;
}

//+---------------------------------------------------
//|
日期時間檢查
//| 格式為：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;
}