javascript日期时间函数(全)

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 = datevalue(''+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;

}