JavaScript日期比较应用小结
JavaScript日期比较在平时的工作中用到的很频繁，在这里做一下小小的总结，有利于自己积累，也有利于交流。
/*
* @discription: 日期计算工具
* @requires:
*/
CalendarUtil = {
/*
* @discription: 获取当前日期的日期串.
* @return:
* {String} (YYYY-MM-DD)日期字符串.
*/
getDate: function() {
var date = new Date();
var month = date.getMonth() < 9 ? "0" + (date.getMonth() + 1) : (date.getMonth() + 1);
var da = date.getDate() <= 9 ? "0" + (date.getDate()) : (date.getDate());
return (date.getFullYear() + "-" + month + "-" + da);
},
/*
* @discription: 返回几天之后的日期串.
* @params:
* date - {String} (YYYY/MM/DD)日期字符串.
* i - {int} 天数.
* @return:
* {String} (YYYY/MM/DD)日期字符串.
*/
getDateAfter: function(date, i) {
var r = date.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if (r != null) {
var date = new Date(r[1], r[3]-1, r[4]);
date.setDate(date.getDate() + i);
var month = date.getMonth() < 9 ? "0" + (date.getMonth() + 1) : (date.getMonth() + 1);
var da = date.getDate() <= 9 ? "0" + (date.getDate()) : (date.getDate());
return date.getFullYear() + "-" + month + "-" + da;
} else {
return date;
}
},
/*
* @discription: 返回几天之前的日期串.
* @params:
* date - {String} (YYYY/MM/DD)日期字符串.
* i - {int} 天数.
* @return:
* {String} (YYYY/MM/DD)日期字符串.
*/
getDateBefore: function(date, i) {
var r = date.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if (r != null) {
var date = new Date(r[1], r[3]-1, r[4]);
date.setDate(date.getDate() - i);
var month = date.getMonth() < 9 ? "0" + (date.getMonth() + 1) : (date.getMonth() + 1);
var da = date.getDate() <=9 ? "0" + (date.getDate()) : (date.getDate());
return date.getFullYear() + "-" + month + "-" + da;
} else {
return date;
}
},
/*
* @discription: 计算两个日期的天数差.
* @params:
* date1 - {String} (YYYY/MM/DD)日期字符串.
* date2 - {String} (YYYY/MM/DD)日期字符串.
* @return:
* {string} 天数差.
*/
getDateDiff: function(date1, date2) {
var aDate, oDate1, oDate2, iDays;
var r1 = date1.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
oDate1 = new Date(r1[1], r1[3] - 1, r1[4]);
var r2 = date2.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
oDate2 = new Date(r2[1], r2[3] - 1, r2[4]);
iDays = parseInt((oDate1 - oDate2) / 1000 / 60 / 60 / 24);
return iDays;
},
/*
* @discription: 计算与当前年份差.
* @params:
* date - {String} (YYYY/MM/DD)日期字符串.
* @return:
* {int} 与当前年份差.
*/
getYearDiff: function(oldDate, newDate) {
var r1 = oldDate.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
var oldYear = r1[1];
var newYear = new Date().getFullYear();
if (typeof newDate != "undefined") {
var r2 = newDate.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
var newYear = r2[1];
}
return newYear - oldYear;
},
/*
* @discription: 获取时期data的星期数（字符串）.
* @params:
* date - {String} (YYYY/MM/DD)日期字符串.
* @return:
* {string} 星期数（字符串）.
*/
getStrWeek: function(date) {
var r1 = date.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
var day = new Date(r1[1], r1[3] - 1, r1[4]).getDay();
var week = "";
switch(day) {
case 0:
week = "星期日";
break;
case 1:
week = "星期一";
break;
case 2:
week = "星期二";
break;
case 3:
week = "星期三";
break;
case 4:
week = "星期四";
break;
case 5:
week = "星期五";
break;
case 6:
week = "星期六";
break;
}
return week;
},
/*
* @discription: 格式化时间，将yyyy-mm-dd格式成 yyyymmdd
* @params:
* date - {String} (YYYY-MM-DD)日期字符串.
* @return:
* {int} yyyymmdd格式日期.
*/
formatSJ: function(sj){
var s=sj.substring(0,4);
var m=sj.substring(5,7);
var n=sj.substring(8,10);
//l+k+p;
var InsertSJ=s+m+n;
return InsertSJ;
},
/*
* @discription: 判断时间逻辑关系，
* @params:
* date1 - {String} (YYYY-MM-DD)，date2 -{String} (YYYY-MM-DD)
* @return:
* true 逻辑正确，false 逻辑不正确
*/
checkStartEnd: function(date1,date2){
var s=date1.substring(0,4);
var m=date1.substring(5,7);
var n=date1.substring(8,10);
var startSJ=s+m+n;
var y=date2.substring(0,4);
var mon=date2.substring(5,7);
var da=date2.substring(8,10);
var endSJ=y+mon+da;
if(startSJ <= endSJ){
return true;
}else{
return false;
}
},
/*
* @discription: 得到当前时间并格式化成YYYY-MM-DD，
* @params:
*
* @return:当前日期的格式化字符串 YYYY-MM-DD
*
*/
getNowFormatDate: function(){
var day = new Date();
var Year = 0;
var Month = 0;
var Day = 0;
var CurrentDate = "";
//初始化时间
Year= day.getFullYear();//ie火狐下都可以
Month= day.getMonth()+1;
Day = day.getDate();
CurrentDate += Year + "-";
if (Month >= 10 )
{
CurrentDate += Month + "-";
}
else
{
CurrentDate += "0" + Month + "-";
}
if (Day >= 10 )
{
CurrentDate += Day ;
}
else
{
CurrentDate += "0" + Day ;
}
return CurrentDate;
}
};