JS的一些时间获取和计算公用方法封装

又是一个记录博客，不想废话的一天。。。。
自己之前写的时间计算和日期格式化的源码整理，直接看代码吧~~

/**
 * 判断年份是否为润年
 * @param {Number} year
 * @return {Boolean}
 */
isLeapYear: function (year) {
	return (year % 400 == 0) || (year % 4 == 0 && year % 100 != 0);
},

/**
 * 获取某一年份的某一月份的天数
 * @param {Number} year
 * @param {Number} month
 * @return {String}
 */
getMonthDays: function (year, month) {
	return [31, null, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month] || (isLeapYear(year) ? 29 : 28);
},

/**
 * 获取某年的某天是第几周
 * @param {Number} y
 * @param {Number} m
 * @param {Number} d
 * @returns {Number}
 */
getWeekNumber: function (y, m, d, curDate) {
	var now = curDate;
	if (now == '') {
		now = new Date(y, m - 1, d);
	}
	var year = now.getFullYear(),
		month = now.getMonth(),
		days = now.getDate();
	//那一天是那一年中的第多少天
	for (var i = 0; i < month; i++) {
		days += getMonthDays(year, i);
	}
	//那一年第一天是星期几
	var yearFirstDay = new Date(year, 0, 1).getDay() || 7;
	var week = null;
	if (yearFirstDay == 1) {
		week = Math.ceil(days / yearFirstDay);
	} else {
		days -= (7 - yearFirstDay + 1);
		week = Math.ceil(days / 7) + 1;
	}
	return week;
},
/**
 * 日期转换
 * @return
 */
formatDate: {
	format: function (date, pattern) {
		pattern = pattern || DEFAULT_PATTERN;
		return pattern.replace(SIGN_REGEXP, function ($0) {
			switch ($0.charAt(0)) {
				case 'y': return padding(date.getFullYear(), $0.length);
				case 'M': return padding(date.getMonth() + 1, $0.length);
				case 'd': return padding(date.getDate(), $0.length);
				case 'w': return date.getDay() + 1;
				case 'h': return padding(date.getHours(), $0.length);
				case 'm': return padding(date.getMinutes(), $0.length);
				case 's': return padding(date.getSeconds(), $0.length);
			}
		});
	},
	parse: function (dateString, pattern) {
		var matchs1 = pattern.match(SIGN_REGEXP);
		var matchs2 = dateString.match(/(\d)+/g);
		if (matchs1.length == matchs2.length) {
			var _date = new Date(1970, 0, 1);
			for (var i = 0; i < matchs1.length; i++) {
				var _int = parseInt(matchs2[i]);
				var sign = matchs1[i];
				switch (sign.charAt(0)) {
					case 'y': _date.setFullYear(_int); break;
					case 'M': _date.setMonth(_int - 1); break;
					case 'd': _date.setDate(_int); break;
					case 'h': _date.setHours(_int); break;
					case 'm': _date.setMinutes(_int); break;
					case 's': _date.setSeconds(_int); break;
				}
			}
			return _date;
		}
		return null;
	},
	formatTo: function(dateString, pattern) {
		var date = new Date(dateString);
		pattern  = pattern || DEFAULT_PATTERN;
		return pattern.replace(SIGN_REGEXP, function ($0) {
			switch ($0.charAt(0)) {
				case 'y': return padding(date.getFullYear(), $0.length);
				case 'M': return padding(date.getMonth() + 1, $0.length);
				case 'd': return padding(date.getDate(), $0.length);
				case 'w': return date.getDay() + 1;
				case 'h': return padding(date.getHours(), $0.length);
				case 'm': return padding(date.getMinutes(), $0.length);
				case 's': return padding(date.getSeconds(), $0.length);
			}
		});
	}
},
/**
 * 获取当前时间段
 * @return 
 */
getNowDate: function() {
	var date = new Date();
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day  = aqqConvert(date.getDate());
	var hour = aqqConvert(date.getHours());
	var minute = aqqConvert(date.getMinutes());
	var second = aqqConvert(date.getSeconds());
	var nowTime = year+month+day+hour+minute+second;
	return nowTime;
},

/**
 * 获取当前时间段
 * @return 
 */
getNowDateByYYYMMDD: function() {
	var date = new Date();
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day  = aqqConvert(date.getDate());
	var nowTime = year+'-'+month+'-'+day;
	return nowTime;
},

/**
 * 获取要计算时间的前或者后N天
 * @param requestDay 需要开始推算的时间
 * @param days 间隔天数
 * @param type 向前或者向后推算(0:向前推算；1：向后推算)
 * @return 
 */
getAgoOrBackwardData: function(requestDay,days,type) {
	let date = Date.parse(new Date(requestDay+' 00:00:00'));
	if(type == 0){
		date = new Date(date - days * 24 * 3600 * 1000)
	} else {
		date = new Date(date + days * 24 * 3600 * 1000)
	}
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day = aqqConvert(date.getDate());
	var nowTime = year+'-'+month+'-'+day;
	return nowTime;
},

/**
 * 获取某一天所在周的开始日期以及结束日期
 * @param requestDay 需要获取的时间
 * @return 
 */
getWeekData: function(requestDay) {
	let now = '';
	if(requestDay) {
		now = new Date(requestDay); // 日期
	} else {
		now = new Date(); // 日期
	}
	let nowDayOfWeek = now.getDay(); // 本周的第几天
	// let nowDay = now.getDate()+1; // 当前日
	let nowDay = now.getDate(); // 当前日
	let nowMonth = now.getMonth(); // 当前月
	let nowYear = now.getFullYear(); // 当前年
	let weekStart = this.getWeekStartDate(nowYear, nowMonth, nowDay, nowDayOfWeek)
	let weekEnd = this.getWeekEndDate(nowYear, nowMonth, nowDay, nowDayOfWeek)
	let weekFormat = [weekStart,weekEnd]
	return weekFormat;
},

// 获得某一周的开始日期
getWeekStartDate(nowYear, nowMonth, nowDay, nowDayOfWeek) {
	var day = nowDayOfWeek || 7;
	// let weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek)
	let weekStartDate = new Date(nowYear, nowMonth, nowDay + 1 - day);
	return this.formatDateTo(weekStartDate,'-')
},

// 获得某一周的结束日期
getWeekEndDate(nowYear, nowMonth, nowDay, nowDayOfWeek) {
	// let weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek))
	var day = nowDayOfWeek || 7;
	let weekEndDate = new Date(nowYear, nowMonth, nowDay + 7 - day)
	return this.formatDateTo(weekEndDate,'-')
},

// 日期格式化
formatDateTo(date,splitStr) {
	var myyear = date.getFullYear();
	var mymonth = date.getMonth() + 1;
	var myweekday = date.getDate();
	if (mymonth < 10) {
		mymonth = "0" + mymonth;
	}
	if (myweekday < 10) {
		myweekday = "0" + myweekday;
	}
	return myyear+ splitStr+ mymonth + splitStr + myweekday
},

/**
 * 获取往前时间段
 * @param days 间隔天数
 * @param otherdate 需要开始推算的时间
 * @return 
 */
getRangeDate: function(days,otherdate,pattern) {
	if(undefined !== otherdate && otherdate) {
		var date = new Date(otherdate);
	} else {
		var date = new Date();
	}
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day = aqqConvert(date.getDate());
	var hour = aqqConvert(date.getHours());
	var minute = aqqConvert(date.getMinutes());
	var second = aqqConvert(date.getSeconds());
	if(pattern =='d') {
		var endTime = year + '-' + month + '-' + day;
	} else {
		var endTime = year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second;
	}
	var date = new Date(date.getTime() - days * 24 * 3600 * 1000);
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day = aqqConvert(date.getDate());
	var hour = aqqConvert(date.getHours());
	var minute = aqqConvert(date.getMinutes());
	var second = aqqConvert(date.getSeconds());
	if(pattern =='d') {
		var startTime = year + '-' + month + '-' + day;
	} else {
		var startTime = year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second;
	}
	var param = [
		startTime,
		endTime
	];		
	return param;
},

/**
 * 获取过后时间段
 * @param days 间隔天数
 * @param otherdate 需要开始推算的时间
 * @return 
 */
getFutureRangeDate: function(days,otherdate) {
	if(undefined !== otherdate && otherdate) {
		var date = new Date(otherdate);
	} else {
		var date = new Date();
	}
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day = aqqConvert(date.getDate());
	var hour = aqqConvert(date.getHours());
	var minute = aqqConvert(date.getMinutes());
	var second = aqqConvert(date.getSeconds());
	var startTime = year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second;
	var date = new Date(date.getTime() + days * 24 * 3600 * 1000);
	var year = date.getFullYear();
	var month = aqqConvert(date.getMonth() + 1);
	var day = aqqConvert(date.getDate());
	var hour = aqqConvert(date.getHours());
	var minute = aqqConvert(date.getMinutes());
	var second = aqqConvert(date.getSeconds());
	var endTime = year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second;
	var param = [
		 startTime,
		 endTime
	];
	return param;
},

/**
 * 获得上个月在昨天这一天的日期
 * @param days 间隔天数
 * @param otherdate 需要开始推算的时间
 * @return 
 */
getLastMonthYestdy(){
	var date = new Date();
	var daysInMonth = new Array([0],[31],[28],[31],[30],[31],[30],[31],[31],[30],[31],[30],[31]);
	var endYear = date.getFullYear();
	var endMonth = date.getMonth()+1;
	var endDay = date.getDate();
	var endTime = endYear + '-' + aqqConvert(endMonth) + '-' + aqqConvert(endDay);
	var startYear = endYear;
	var startMonth = endMonth;
	var startDay = endDay;
	if(startYear%4 == 0 && startYear%100 != 0){
	   daysInMonth[2] = 29;
	}
	if(startMonth - 1 == 0){
	   startYear -= 1;
	   startMonth = 12;
	} else {
	   startMonth -= 1;
	}
	startDay = daysInMonth[startMonth] >= startDay ? startDay+1 : daysInMonth[startMonth];
	var startTime = startYear+"-"+aqqConvert(startMonth)+"-"+aqqConvert(startDay);
	var param = [
		startTime,
		endTime
   ];
	return param;
 },
 /**
 * 是否在系统配置时间段内
 * @param min 最小时间
 * @param max 最大时间
 * @param sysInfo 系统信息
 * @return Blooen
 */
bettweenSysDate: function (min, max, sysInfo) {
	if(min == undefined || max == undefined || sysInfo == undefined) {
           return false;
	}
	let sysMin  = sysInfo.SP_SYSTEM_TABLE_MIN.pvalue;
	let sysMax  = sysInfo.SP_SYSTEM_TABLE_MAX.pvalue;
	if(min >=sysMin && max <=sysMax){
		return true;
	}
	return false;
},