日积月累的js日期操作的方法，吐血奉献

浏览数：40 / 时间：2015年06月09日

String.prototype.Left = function(len){

if(isNaN(len)||len==null){

len = 0;

} else {

if(parseInt(len)<0||parseInt(len)>this.length) {

len = 0;

}

return this.substr(0,this.length-len)+‘**‘;

}

//日期自动补零程序

function appendZero(n)

{

return(("00"+ n).substr(("00"+ n).length-2));

}

//获得当年当月最大天数

function GetMonthMaxDay(theYear,theMonth){

var theDays = new Array(31,28,31,30,31,30,31,31,30,31,30,31);

var theMonthDay = 0, tmpYear = this.formatYear(theYear);

theMonthDay = theDays[theMonth];

if (theMonth == 1){ //theMonth is February

if (((tmpYear % 4 == 0) && (tmpYear % 100 != 0)) || (tmpYear % 400 == 0)){

theMonthDay++;

}

return(theMonthDay);

}

//把年份格式化成4位

function formatYear(theYear){

var tmpYear = parseInt(theYear,10);

if (tmpYear < 100){

tmpYear += 1900;

if (tmpYear < 1940){

tmpYear += 100;

}

if (tmpYear < this.MinYear){

tmpYear = this.MinYear;

}

if (tmpYear > this.MaxYear){

tmpYear = this.MaxYear;

}

return(tmpYear);

}

//对javascript日期进行格式化

//formattype是返回的时间类型

//返回：返回时间串

function formatDate(day,formattype){

var dateString = "";

var thisyear = formatYear(day.getFullYear());

var thismonth = appendZero(day.getMonth()+1);

var thisday = appendZero(day.getDate());

var thishour = appendZero(day.getHours());

var thismin = appendZero(day.getMinutes());

var thissec = appendZero(day.getSeconds());

switch (formattype){

case 0:

dateString = thisyear + "年" + thismonth + "月" + thisday + "日";

break;

case 1:

dateString = thisyear + "-" + thismonth + "-" + thisday;

break;

case 2:

dateString = thisyear + "-" + thismonth + "-" + thisday+ " " + appendZero(thishour) + ":" + appendZero(thismin) + ":" + appendZero(thissec);

break;

default:

dateString = thisyear + "-" + thismonth + "-" + thisday;

}

return dateString;

}

//取得本周第一天

function getWeekFirstDay(formattype)

{

var Nowdate=new Date();

var WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);

return formatDate(WeekFirstDay,formattype);

}

//取得本周第七天

function getWeekLastDay(formattype)

{

var Nowdate=new Date();

var WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);

var WeekLastDay=new Date((WeekFirstDay/1000+6*86400)*1000);

return formatDate(WeekLastDay,formattype);

}

function testDate() {

var Nowdate=new Date();

//本月

var MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth(),1);

alert(MonthFirstDay.getFullYear())

alert(appendZero(MonthFirstDay.getMonth()+1))

//上月

var lastMonth = new Date(Nowdate.getFullYear(),Nowdate.getMonth()-1,1);

alert(lastMonth.getFullYear())

alert(appendZero(lastMonth.getMonth()+1))

}

//取得本月第一天

function getMonthFirstDay(formattype)

{

var Nowdate=new Date();

var MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth(),1);

return formatDate(MonthFirstDay,formattype);

}

//取得本月最后一天

function getMonthLastDay(formattype)

{

var Nowdate=new Date();

var MonthNextFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth()+1,1);

var MonthLastDay=new Date(MonthNextFirstDay-86400000);

return formatDate(MonthLastDay,formattype);

}

function getDateFromString(strDate){

var arrYmd = strDate.split("-");

for(var i=0;i<arrYmd.length;i++){

if(arrYmd[i].length>1 && arrYmd[i].indexOf("0")==0)

arrYmd[i]= arrYmd[i].substring(1);

}

var numYear = parseInt(arrYmd[0]);

var numMonth = parseInt(arrYmd[1]) - 1;

var numDay = parseInt(arrYmd[2]);

return new Date(numYear, numMonth, numDay);

}

下列函数返回需要的时间偏移值不能大于30

参数：dadd是日偏移值，-表示向前推，+向后推

formattype是返回的时间类型

返回：返回时间串

function getDiffDate(dadd,formattype)

{

//可以加上错误处理

var a = new Date();

a = a.valueOf();

a = a + dadd * 24 * 60 * 60 * 1000;

a = new Date(a);

return formatDate(a,formattype);

}

//getDiffDate(+2,0)

//取得指定日期的年月日时分秒

//参数：dateValue 是格式形如：2007/04/05

function TimeCom(dateValue){

var newCom = new Date(dateValue);

this.year = newCom.getFullYear();

this.month = newCom.getMonth()+1;

this.day = newCom.getDate();

this.hour = newCom.getHours();

this.minute = newCom.getMinutes();

this.second = newCom.getSeconds();

this.msecond = newCom.getMilliseconds();

this.week = newCom.getDay();

}

//取得两个日期之间的时间差

//参数：interval : y或year-表示取得相差的年份 n或month-表示相差的月份 d或day表示相差的天数 h或hour-表示相差的小时 m或minute-表示相差的分钟 s或second-表示相差的秒数 ms或msecond-表示相差的毫秒数 w或week-表示相差的周数

// date1:起始日期

// date2:结束日期

function DateDiff(interval,date1,date2)

{

var TimeCom1 = new TimeCom(date1);

var TimeCom2 = new TimeCom(date2);

var result;

switch(String(interval).toLowerCase())

{

case "y":

case "year":

result = TimeCom1.year-TimeCom2.year;

break;

case "n":

case "month":

result = (TimeCom1.year-TimeCom2.year)*12+(TimeCom1.month-TimeCom2.month);

break;

case "d":

case "day":

result = Math.round((Date.UTC(TimeCom1.year,TimeCom1.month-1,TimeCom1.day)-Date.UTC(TimeCom2.year,TimeCom2.month-1,TimeCom2.day))/(1000*60*60*24));

break;

case "h":

case "hour":

result = Math.round((Date.UTC(TimeCom1.year,TimeCom1.month-1,TimeCom1.day,TimeCom1.hour)-Date.UTC(TimeCom2.year,TimeCom2.month-1,TimeCom2.day,TimeCom2.hour))/(1000*60*60));

break;

case "m":

case "minute":

result = Math.round((Date.UTC(TimeCom1.year,TimeCom1.month-1,TimeCom1.day,TimeCom1.hour,TimeCom1.minute)-Date.UTC(TimeCom2.year,TimeCom2.month-1,TimeCom2.day,TimeCom2.hour,TimeCom2.minute))/(1000*60));

break;

case "s":

case "second":

result = Math.round((Date.UTC(TimeCom1.year,TimeCom1.month-1,TimeCom1.day,TimeCom1.hour,TimeCom1.minute,TimeCom1.second)-Date.UTC(TimeCom2.year,TimeCom2.month-1,TimeCom2.day,TimeCom2.hour,TimeCom2.minute,TimeCom2.second))/1000);

break;

case "ms":

case "msecond":

result = Date.UTC(TimeCom1.year,TimeCom1.month-1,TimeCom1.day,TimeCom1.hour,TimeCom1.minute,TimeCom1.second,TimeCom1.msecond)-Date.UTC(TimeCom2.year,TimeCom2.month-1,TimeCom2.day,TimeCom2.hour,TimeCom2.minute,TimeCom2.second,TimeCom1.msecond);

break;

case "w":

case "week":

result = Math.round((Date.UTC(TimeCom1.year,TimeCom1.month-1,TimeCom1.day)-Date.UTC(TimeCom2.year,TimeCom2.month-1,TimeCom2.day))/(1000*60*60*24)) % 7;

break;

default:

result = "invalid";

}

return(result);

}

下列函数返回需要的时间偏移值不能大于30

参数：interval : y或year-表示取得相差的年份 n或month-表示相差的月份 d或day表示相差的天数 h或hour-表示相差的小时 m或minute-表示相差的分钟 s或second-表示相差的秒数 ms或msecond-表示相差的毫秒数 w或week-表示相差的周数

num是偏移值，-表示向前推，+向后推

dateValue 指定的日期

formattype是返回的时间类型

返回：返回时间串

function DateAdd(interval,num,dateValue,formattype)

{

var newCom = new TimeCom(dateValue);

switch(String(interval).toLowerCase())

{

case "y": case "year": newCom.year += num; break;

case "n": case "month": newCom.month += num; break;

case "d": case "day": newCom.day += num; break;

case "h": case "hour": newCom.hour += num; break;

case "m": case "minute": newCom.minute += num; break;

case "s": case "second": newCom.second += num; break;

case "ms": case "msecond": newCom.msecond += num; break;

case "w": case "week": newCom.day += num*7; break;

default: return("invalid");

}

var now = newCom.year+"/"+newCom.month+"/"+newCom.day+" "+newCom.hour+":"+newCom.minute+":"+newCom.second;

return formatDate(new Date(now),formattype);

}

//alert(DateAdd(‘d‘,-30,new Date(),0));

//取得当前日期

function getToDay(formattype){

var Nowdate=new Date();

M=Number(Nowdate.getMonth())+1;

Nowdate = new Date(Nowdate.getFullYear()+"/"+M+"/"+Nowdate.getDate());

return formatDate(Nowdate,formattype);

}

//上月第一天

function getPreviousFirstDay(formattype)

{

var Nowdate=new Date();

var MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth()-1,1);

return formatDate(MonthFirstDay,formattype);

}

//上月最后一天

function getPreviousLastDay(formattype)

{

var Nowdate=new Date();

var MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth(),1);

return formatDate(new Date(MonthFirstDay-86400000),formattype);

}

//上周第一天

function getPreviousFirstWeekDay(formattype)

{

var Nowdate=new Date();

var WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);

WeekFirstDay=new Date(WeekFirstDay-86400000*7);

return formatDate(WeekFirstDay,formattype);

}

//上周最后一天

function showPreviousLastWeekDay(formattype)

{

var Nowdate=new Date();

var WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);

WeekFirstDay = new Date(WeekFirstDay-86400000);

return formatDate(WeekFirstDay,formattype);

}

//上一天

function getPreviousDay(formattype)

{

var MonthFirstDay=new Date();

MonthFirstDay = new Date(MonthFirstDay-86400000);

return formatDate(MonthFirstDay,formattype);

}

//下一天

function getNextDay(formattype)

{

var MonthFirstDay=new Date();

MonthFirstDay = new Date((MonthFirstDay/1000+86400)*1000);

return formatDate(MonthFirstDay,formattype);

}

//下周第一天

function getNextFirstWeekDay(formattype)

{

var Nowdate=new Date();

var WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);

var MonthFirstDay=new Date((WeekFirstDay/1000+6*86400)*1000);

MonthFirstDay=new Date((MonthFirstDay/1000+86400)*1000);

return formatDate(MonthFirstDay,formattype);

}

//下周最后一天

function getNextLastWeekDay(formattype)

{

var Nowdate=new Date();

var WeekFirstDay=new Date(Nowdate-(Nowdate.getDay()-1)*86400000);

var WeekLastDay=new Date((WeekFirstDay/1000+6*86400)*1000);

var MonthFirstDay=new Date((WeekLastDay/1000+7*86400)*1000);

return formatDate(MonthFirstDay,formattype);

}

//下月第一天

function getNextFirstDay(formattype)

{

var Nowdate=new Date();

var MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth(),1);

MonthFirstDay=new Date(MonthFirstDay.getYear(),MonthFirstDay.getMonth()+1,1);

return formatDate(MonthFirstDay,formattype);

}

//下月最后一天

function getNextLastDay(formattype)

{

var Nowdate=new Date();

var MonthFirstDay=new Date(Nowdate.getFullYear(),Nowdate.getMonth(),1);

MonthFirstDay=new Date(new Date(MonthFirstDay.getYear(),MonthFirstDay.getMonth()+2,1)-86400000);

return formatDate(MonthFirstDay,formattype);

}

function getDateList(){

var d = new Date(‘2007/07/07‘);

alert(d.getMonth())

}

</script>

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日积月累的js日期操作的方法，吐血奉献

标签： java com 方法 it ha for js la 时间 java com 方法 it ha for js la 时间

日积月累的js日期操作的方法，吐血奉献

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