日期的格式化函数

 

 

//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 
 
 
//---------------------------------------------------  
// 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());  
	}
}

 

使用方法：

new Date().Format("yyyy年mm月dd日 星期W")