Js获取当前日期时间及其它操作

var myDate = new Date();

myDate.getYear();
//获取当前年份(2位)

myDate.getFullYear();
//获取完整的年份(4位,1970-????)

myDate.getMonth();
//获取当前月份(0-11,0代表1月)

myDate.getDate();
//获取当前日(1-31)

myDate.getDay();
//获取当前星期X(0-6,0代表星期天)

myDate.getTime();
//获取当前时间(从1970.1.1开始的毫秒数)

myDate.getHours();
//获取当前小时数(0-23)

myDate.getMinutes();
//获取当前分钟数(0-59)

myDate.getSeconds();
//获取当前秒数(0-59)

myDate.getMilliseconds();
//获取当前毫秒数(0-999)

myDate.toLocaleDateString();
//获取当前日期

var
mytime=myDate.toLocaleTimeString();
//获取当前时间

myDate.toLocaleString(
);
//获取日期与时间

日期时间脚本库方法列表

Date.prototype.isLeapYear
判断闰年

Date.prototype.Format 日期格式化

Date.prototype.DateAdd 日期计算

Date.prototype.DateDiff 比较日期差

Date.prototype.toString 日期转字符串

Date.prototype.toArray 日期分割为数组

Date.prototype.DatePart 取日期的部分信息

Date.prototype.MaxDayOfDate 取日期所在月的最大天数

Date.prototype.WeekNumOfYear 判断日期所在年的第几周

StringToDate 字符串转日期型

IsValidDate 验证日期有效性

CheckDateTime 完整日期时间检查

daysBetween 日期天数差

js代码：

//---------------------------------------------------

// 判断闰年

//---------------------------------------------------

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 时间

// mm/m 分钟

// 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;

}

//+---------------------------------------------------

//| 求两个时间的天数差 日期格式为
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);

}

//+---------------------------------------------------

//| 日期计算

//+---------------------------------------------------

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());

}

}

//+---------------------------------------------------

//| 比较日期差 dtEnd
格式为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'
)//如果是字符串转换为日期型

{

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();

}

}

//+---------------------------------------------------

//|
日期输出字符串，重载了系统的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;

}

//+---------------------------------------------------

//| 日期合法性验证

//|
格式为：YYYY-MM-DD或YYYY/MM/DD

//+---------------------------------------------------

function
IsValidDate(DateStr)

{

var
sDate=DateStr.replace(/(^\s+|\s+$)/g,'');
//去两边空格;

if(sDate=='') return
true;

//如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''

//数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式

var s =
sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2
}/g,'');

if (s=='')
//说明格式满足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('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');

return
false;

}

}

else

{

//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');

return
false;

}

return
true;

}

//+---------------------------------------------------

//| 日期时间检查

//| 格式为：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;

}

//+---------------------------------------------------

//| 把日期分割成数组

//+---------------------------------------------------

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;

}

//+---------------------------------------------------

//| 取得日期数据信息

//| 参数 interval 表示数据类型

//| y 年 m月 d日 w星期 ww周 h时 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;

}

//+---------------------------------------------------

//| 取得当前日期所在月的最大天数

//+---------------------------------------------------

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;

}

//+---------------------------------------------------

//| 取得当前日期所在周是一年中的第几周

//+---------------------------------------------------

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;

}

//+---------------------------------------------------

//|
字符串转成日期类型

//| 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;

}

若要显示:当前日期加时间(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();
//时

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);

}