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
<script>
//---------------------------------------------------
// 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());
case 'm':
return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
dtTmp.getSeconds());
case 'y':
return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
dtTmp.getSeconds());
}
}
//+---------------------------------------------------
//| 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串
//+---------------------------------------------------
Date.prototype.DateDiff = function (strInterval, dtEnd) {
var dtStart = this;
if (typeof dtEnd == 'string') //如果是字符串转换为日期型
{
dtEnd = StringToDate(dtEnd);
}
switch (strInterval) {
case 's':
return parseInt((dtEnd - dtStart) / 1000);
case 'n':
return parseInt((dtEnd - dtStart) / 60000);
case 'h':
return parseInt((dtEnd - dtStart) / 3600000);
case 'd':
return parseInt((dtEnd - dtStart) / 86400000);
case 'w':
return parseInt((dtEnd - dtStart) / (86400000 * 7));
case 'm':
return (dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart.getMonth() +
1);
case 'y':
return dtEnd.getFullYear() - dtStart.getFullYear();
}
}
//+---------------------------------------------------
//| 日期输出字符串，重载了系统的toString方法
//+---------------------------------------------------
Date.prototype.toString = function (showWeek) {
var myDate = this;
var str = myDate.toLocaleDateString();
if (showWeek) {
var Week = ['日', '一', '二', '三', '四', '五', '六'];
str += ' 星期' + Week[myDate.getDay()];
}
return str;
}
//+---------------------------------------------------
//| 日期合法性验证
//| 格式为：YYYY-MM-DD或YYYY/MM/DD
//+---------------------------------------------------
function IsValidDate(DateStr) {
var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); //去两边空格;
if (sDate == '') return true;
//如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''
//数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式
var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g, '');
if (s == '') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D
{
var t = new Date(sDate.replace(/\-/g, '/'));
var ar = sDate.split(/[-/:]/);
if (ar[0] != t.getYear() || ar[1] != t.getMonth() + 1 || ar[2] != t.getDate()) {
//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
return false;
}
} else {
//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
return false;
}
return true;
}
//+---------------------------------------------------
//| 日期时间检查
//| 格式为：YYYY-MM-DD HH:MM:SS
//+---------------------------------------------------
function CheckDateTime(str) {
var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
var r = str.match(reg);
if (r == null) return false;
r[2] = r[2] - 1;
var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
if (d.getFullYear() != r[1]) return false;
if (d.getMonth() != r[2]) return false;
if (d.getDate() != r[3]) return false;
if (d.getHours() != r[4]) return false;
if (d.getMinutes() != r[5]) return false;
if (d.getSeconds() != r[6]) return false;
return true;
}
//+---------------------------------------------------
//| 把日期分割成数组
//+---------------------------------------------------
Date.prototype.toArray = function () {
var myDate = this;
var myArray = Array();
myArray[0] = myDate.getFullYear();
myArray[1] = myDate.getMonth();
myArray[2] = myDate.getDate();
myArray[3] = myDate.getHours();
myArray[4] = myDate.getMinutes();
myArray[5] = myDate.getSeconds();
return myArray;
}
//+---------------------------------------------------
//| 取得日期数据信息
//| 参数 interval 表示数据类型
//| y 年 m月 d日 w星期 ww周 h时 n分 s秒
//+---------------------------------------------------
Date.prototype.DatePart = function (interval) {
var myDate = this;
var partStr = '';
var Week = ['日', '一', '二', '三', '四', '五', '六'];
switch (interval) {
case 'y':
partStr = myDate.getFullYear();
break;
case 'm':
partStr = myDate.getMonth() + 1;
break;
case 'd':
partStr = myDate.getDate();
break;
case 'w':
partStr = Week[myDate.getDay()];
break;
case 'ww':
partStr = myDate.WeekNumOfYear();
break;
case 'h':
partStr = myDate.getHours();
break;
case 'n':
partStr = myDate.getMinutes();
break;
case 's':
partStr = myDate.getSeconds();
break;
}
return partStr;
}
//+---------------------------------------------------
//| 取得当前日期所在月的最大天数
//+---------------------------------------------------
Date.prototype.MaxDayOfDate = function () {
var myDate = this;
var ary = myDate.toArray();
var date1 = (new Date(ary[0], ary[1] + 1, 1));
var date2 = date1.dateAdd(1, 'm', 1);
var result = dateDiff(date1.Format('yyyy-MM-dd'), date2.Format('yyyy-MM-dd'));
return result;
}
//+---------------------------------------------------
//| 取得当前日期所在周是一年中的第几周
//+---------------------------------------------------
Date.prototype.WeekNumOfYear = function () {
var myDate = this;
var ary = myDate.toArray();
var year = ary[0];
var month = ary[1] + 1;
var day = ary[2];
document.write('< script language=VBScript\> \n');
document.write('myDate = DateValue('
'+month+' - '+day+' - '+year+'
') \n');
document.write('result = DatePart('
ww ', myDate) \n');
document.write(' \n');
return result;
}
//+---------------------------------------------------
//| 字符串转成日期类型
//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
//+---------------------------------------------------
function StringToDate(DateStr) {
var converted = Date.parse(DateStr);
var myDate = new Date(converted);
if (isNaN(myDate)) {
//var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';
var arys = DateStr.split('-');
myDate = new Date(arys[0], --arys[1], arys[2]);
}
return myDate;
}
</script>
本文转自博客园执着的笨蛋的博客，原文链接：[转]js日期时间函数(经典＋完善＋实用)，如需转载请自行联系原博主。
