用于JS日期格式化，以及简单运算的Date包装工具类

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1. [文件] yDate.js
/**
* | yDate.js | Copyright (c) 2013 yao.yl | email: redrainyi@126.com | Date: 2012-09-03 |
*/
(function(global) {

var objectPrototypeToString = Object.prototype.toString;

var isDate = function(value) {
return objectPrototypeToString.call(value) === '[object Date]';
};

var cloneDate = function(pDate, process) {
var vDate = new Date(pDate.getTime());
var year = vDate.getFullYear(), //
month = vDate.getMonth(), //
date = vDate.getDate(), //
hours = vDate.getHours(), //
minutes = vDate.getMinutes(), //
seconds = vDate.getSeconds();//
(!!process) && process(vDate, year, month, date, hours, minutes, seconds);
return vDate;
};

var parseDate = function(dateString, pattern) {
try {
var matchs1 = (pattern || (dateString.length === 10 ? 'yyyy-MM-dd' : 'yyyy-MM-dd HH:mm:ss')).match(/([yMdHsm])(\1*)/g);
var matchs2 = dateString.match(/(\d)+/g);
if (matchs1.length === matchs2.length) {
var $d = new Date(1970, 0, 1);
for (var i = 0; i < matchs1.length; i++) {
var $i = parseInt(matchs2[i], 10);
switch (matchs1[i].charAt(0) || '') {
case 'y' :
$d.setFullYear($i);
break;
case 'M' :
$d.setMonth($i - 1);
break;
case 'd' :
$d.setDate($i);
break;
case 'H' :
$d.setHours($i);
break;
case 'm' :
$d.setMinutes($i);
break;
case 's' :
$d.setSeconds($i);
break;
default :
//
}
}
return $d;
}
} catch (err) {
alert(err)
}
return null;
};

var formatDate = (function() {
var SIGN_RG = /([yMdHsm])(\1*)/g;
function padding(s, len) {
var len = len - (s + "").length;
for (var i = 0; i < len; i++) {
s = "0" + s;
}
return s;
}
return function(value, pattern) {
if (!isDate(value)) {
return '';
}
try {
pattern = pattern || 'yyyy-MM-dd HH:mm:ss';
return pattern.replace(SIGN_RG, function($0) {
switch ($0.charAt(0)) {
case 'y' :
return padding(value.getFullYear(), $0.length);
case 'M' :
return padding(value.getMonth() + 1, $0.length);
case 'd' :
return padding(value.getDate(), $0.length);
case 'w' :
return value.getDay() + 1;
case 'H' :
return padding(value.getHours(), $0.length);
case 'm' :
return padding(value.getMinutes(), $0.length);
case 's' :
return padding(value.getSeconds(), $0.length);
case 'q' :
return Math.floor((this.getMonth() + 3) / 3);
default :
return '';
}
});
} catch (err) {
return '';
}
};
})();

var getActualMaximum = function(date) {
var vDate = new Date(date.getTime());
vDate.setMonth(vDate.getMonth() + 1);
vDate.setDate(0);
return vDate.getDate();
}

var YDate = function() {
var p0 = arguments[0];
var p1 = arguments[1];
if (typeof p0 === 'number' && isFinite(value)) {
this.vDate = new Date(p0);//millis
} else if (isDate(p0)) {
this.vDate = new Date(p0.getTime());
} else if (typeof p0 === 'string') {
if (typeof p1 === 'string' || typeof p1 === 'undefined') {
this.vDate = parseDate(p0, p1);
}
} else if (arguments.length == 0) {
this.vDate = new Date();
} else {
throw 'YDate Constructor Error!';
}
this.$year = this.vDate.getFullYear();
this.$month = this.vDate.getMonth();
this.$date = this.vDate.getDate();
this.$hours = this.vDate.getHours();
this.$minutes = this.vDate.getMinutes();
this.$seconds = this.vDate.getSeconds();
this.$day = this.vDate.getDay();
};

YDate.prototype = {
plusYear : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setFullYear(year + value);
}));
},
plusMonth : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setMonth(month + value);
}));
},
plusDate : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setDate(date + value);
}));
},
plusHours : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setHours(hours + value);
}));
},
plusMinutes : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setMinutes(minutes + value);
}));
},
plusSeconds : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setSeconds(seconds + value);
}));
},
minusYear : function(value) {
return this.plusYears(-value);
},
minusMonth : function(value) {
return this.plusMonths(-value);
},
minusDate : function(value) {
return this.plusDate(-value);
},
minusHours : function(value) {
return this.plusHours(-value);
},
minusMinutes : function(value) {
return this.plusMinutes(-value);
},
minusSeconds : function(value) {
return this.plusSeconds(-value);
},
setYear : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setFullYear(value);
}));
},
setMonth : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setMonth(value);http://www.huiyi8.com/clxgt/
}));窗帘效果图
},
setDate : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setDate(value);
}));
},
setHours : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setHours(value);
}));
},
setMinutes : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setMinutes(value);
}));
},
setSeconds : function(value) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
vDate.setSeconds(value);
}));
},
getYear : function() {
return vDate.getFullYear();
},
getMonth : function() {
return vDate.getMonth();
},
getDate : function() {
return vDate.getDate();
},
getHours : function() {
return vDate.getHours();
},
getMinutes : function() {
return vDate.getMinutes();
},
getSeconds : function() {
return vDate.getSeconds();
},
getDayOfWeek : function() {
return vDate.getDay();
},
toDate : function() {
return cloneDate(this.vDate);
},
calculate : function(expression) {

},
clone : function() {
return new YDate(cloneDate(this.vDate));
},
getBegin : function(field) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
switch (field) {
case 'yyyy' ://year
vDate.setMonth(0);
vDate.setDate(1);
vDate.setHours(0);
vDate.setMinutes(0);
vDate.setSeconds(0);
break;
case 'MM' ://month
vDate.setDate(1);
vDate.setHours(0);
vDate.setMinutes(0);
vDate.setSeconds(0);
case 'dd' ://date
vDate.setHours(0);
vDate.setMinutes(0);
vDate.setSeconds(0);
break;
default :
//Ignore
}
}));
},
getEnd : function(field) {
return new YDate(cloneDate(this.vDate, function(vDate, year, month, date, hours, minutes, seconds) {
switch (field) {
case 'yyyy' ://year
vDate.setMonth(11);
vDate.setDate(31);
vDate.setHours(23);
vDate.setMinutes(59);
vDate.setSeconds(59);
break;
case 'MM' ://month
vDate.setDate(getActualMaximum(vDate));
vDate.setHours(23);
vDate.setMinutes(59);
vDate.setSeconds(59);
case 'dd' ://date
vDate.setHours(23);
vDate.setMinutes(59);
vDate.setSeconds(59);
break;
default :
//Ignore
}
}));
},
toString : function(pattern) {
return formatDate(this.vDate, pattern);
}
};
global.YDate = YDate;
})(window);
2. [代码]使用介绍

<!Doctype html>
<html>
<head>
<title>yDate.test</title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<script type="text/javascript" src="yDate.js">
</script>
</head>
<body>
<script type="text/javascript">

//创建一个YDate日期对象
var date1 = new YDate('2013-01-01 11:50:20');
alert(date1.toString());
//获得JS Date对象
alert(date1.toDate());

var date2 = new YDate('2012-02-11');
alert(date2.toString());
//format日期对象
alert(date2.toString('yyyy年MM月dd日'));

//获得本月最后时刻的日期
var date3 = date2.getEnd('MM');//yyyy MM dd
alert(date3.toString());

//获得本年最初时刻的日期
var date4 = date2.getBegin('yyyy');
alert(date4.toString());

</script>
</body>
</html>