日期时间js

/*获取yyyy-mm-dd day天的日期数组

* getDays('2012-11-01',2)

* 返回['2012-11-01','2012-11-02']

*/





function getDays(str, day){

var dd, mm, yy;

var reg = /^(\d{4})-(\d{1,2})-(\d{1,2})$/;

if (arr = str.match(reg)) {

yy = Number(arr[1]);

mm = Number(arr[2])-1;

dd = Number(arr[3]);

} else {

var d = new Date();

yy = d.getUTCFullYear();

mm = ("00"+(d.getUTCMonth())).slice(-2);

dd = ("00"+d.getUTCDate()).slice(-2);

}

var aa=[];

if(day>=0){

for(var i=0;i

aa.push(_getDate(yy, mm, dd, i));

}

}else{

for(var i=(day+1);i<=0;i++){

aa.push(_getDate(yy, mm, dd, i));

}

}

//alert(aa);

return aa;

}

/*

*返回n天后的日期

* get_day("2012-11-01",3) 返回 "2012-11-04"

*

*/

function get_day(str, n){

var dd, mm, yy;

var reg = /^(\d{4})-(\d{1,2})-(\d{1,2})$/;

if (arr = str.match(reg)) {

yy = Number(arr[1]);

mm = Number(arr[2])-1;

dd = Number(arr[3]);

} else {

var d = new Date();

yy = d.getUTCFullYear();

mm = ("00"+(d.getUTCMonth())).slice(-2);

dd = ("00"+d.getUTCDate()).slice(-2);

}

var aa=_getDate(yy, mm, dd, n);

return aa;

}

/*

* 获取day天后的日期

* 例如_getDate(2012,11,1,2):获取2012-11-01后2天的日期

例如_getDate(2012,11,1,-2):获取2012-11-01前2天的日期

*/

function _getDate(yy, mm, dd, day) {

var s, d, t, t2;

t = Date.UTC(yy, mm, dd);

t2 = day * 1000 * 3600 * 24; //加减day天的时间

t+= t2;

d = new Date(t);

s = d.getUTCFullYear() + "-";

s += ("00"+(d.getUTCMonth()+1)).slice(-2) + "-";

s += ("00"+d.getUTCDate()).slice(-2);

//alert(s);

return s;

}

/*这个方法将取得 某日期(nowDate) 所在周的星期几(weekDay)的日期

* getNextDate("2012-11-04",1); 2012-11-04所在周的星期一的日期

* 返回2012-10-29

*

*/

function getNextDate(str,weekDay){

var dd, mm, yy;

var reg = /^(\d{4})-(\d{1,2})-(\d{1,2})$/;

if (arr = str.match(reg)) {

yy = Number(arr[1]);

mm = Number(arr[2])-1;

dd = Number(arr[3]);

}

var t = Date.UTC(yy, mm, dd);

var d = new Date(t);

weekDay%=7;

var day = d.getDay();

if(day==0)day=7;//自己加的 否则如果是周日 day=0 我取所在周一的日期，返回的是下周的

var time = d.getTime();

var sub = weekDay-day;

time+=sub*24*3600000;

d.setTime(time);

var s = d.getUTCFullYear() + "-";

s += ("00"+(d.getUTCMonth()+1)).slice(-2) + "-";

s += ("00"+d.getUTCDate()).slice(-2);

return s;

}

function getNextDate1(str,weekDay){

var d=new Date(str);

weekDay%=7;

var day = d.getDay();

if(day==0)day=7;//自己加的 否则如果是周日 day=0 我取所在周一的日期，返回的是下周的

var time = d.getTime();

var sub = weekDay-day;

time+=sub*24*3600000;

d.setTime(time);

var s = d.getUTCFullYear() + "-";

s += ("00"+(d.getUTCMonth()+1)).slice(-2) + "-";

s += ("00"+d.getUTCDate()).slice(-2);

return s;

}

/*

* 参数 2012-11-08

* 返回周几

*/

function week(dd){

dd=dd.replace(/\-/g,"/");

var week="日一二三四五六".charAt(new Date(dd).getDay());

return week;

}

/*

* 获取当前日期

*/

function getCurrDay(){

var d = new Date();

yy = d.getUTCFullYear();

mm = ("00"+(d.getUTCMonth()+1)).slice(-2);

dd = ("00"+d.getUTCDate()).slice(-2);

return yy+"-"+mm+"-"+dd;

}







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