/**
* 日期处理工具类
*/
var DateUtil = function(){
/**
* 判断闰年
* @param date Date日期对象
* @return boolean true 或false
*/
this.isLeapYear = function(date){
return (0==date.getYear()%4&&((date.getYear()%100!=0)||(date.getYear()%400==0)));
}
/**
* 日期对象转换为指定格式的字符串
* @param f 日期格式,格式定义如下 yyyy-MM-dd HH:mm:ss
* @param date Date日期对象, 如果缺省，则为当前时间
*
* 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
* @return string 指定格式的时间字符串
*/
this.dateToStr = function(formatStr, date){
formatStr = arguments[0] || "yyyy-MM-dd HH:mm:ss";
date = arguments[1] || new Date();
var str = formatStr;
var Week = ['日','一','二','三','四','五','六'];
str=str.replace(/yyyy|YYYY/,date.getFullYear());
str=str.replace(/yy|YY/,(date.getYear() % 100)>9?(date.getYear() % 100).toString():'0' + (date.getYear() % 100));
str=str.replace(/MM/,date.getMonth()>9?(date.getMonth() + 1):'0' + (date.getMonth() + 1));
str=str.replace(/M/g,date.getMonth());
str=str.replace(/w|W/g,Week[date.getDay()]);
str=str.replace(/dd|DD/,date.getDate()>9?date.getDate().toString():'0' + date.getDate());
str=str.replace(/d|D/g,date.getDate());
str=str.replace(/hh|HH/,date.getHours()>9?date.getHours().toString():'0' + date.getHours());
str=str.replace(/h|H/g,date.getHours());
str=str.replace(/mm/,date.getMinutes()>9?date.getMinutes().toString():'0' + date.getMinutes());
str=str.replace(/m/g,date.getMinutes());
str=str.replace(/ss|SS/,date.getSeconds()>9?date.getSeconds().toString():'0' + date.getSeconds());
str=str.replace(/s|S/g,date.getSeconds());
return str;
}
/**
* 日期计算
* @param strInterval string 可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒
* @param num int
* @param date Date 日期对象
* @return Date 返回日期对象
*/
this.dateAdd = function(strInterval, num, date){
date = arguments[2] || new Date();
switch (strInterval) {
case 's' :return new Date(date.getTime() + (1000 * num));
case 'n' :return new Date(date.getTime() + (60000 * num));
case 'h' :return new Date(date.getTime() + (3600000 * num));
case 'd' :return new Date(date.getTime() + (86400000 * num));
case 'w' :return new Date(date.getTime() + ((86400000 * 7) * num));
case 'm' :return new Date(date.getFullYear(), (date.getMonth()) + num, date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds());
case 'y' :return new Date((date.getFullYear() + num), date.getMonth(), date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds());
}
}
/**
* 比较日期差 dtEnd 格式为日期型或者有效日期格式字符串
* @param strInterval string 可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒
* @param dtStart Date 可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒
* @param dtEnd Date 可选值 y 年 m月 d日 w星期 ww周 h时 n分 s秒
*/
this.dateDiff = function(strInterval, dtStart, 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();
}
}
/**
* 字符串转换为日期对象
* @param date Date 格式为yyyy-MM-dd HH:mm:ss，必须按年月日时分秒的顺序，中间分隔符不限制
*/
this.strToDate = function(dateStr){
var data = dateStr;
var reCat = /(\d{1,4})/gm;
var t = data.match(reCat);
t[1] = t[1] - 1;
eval('var d = new Date('+t.join(',')+');');
return d;
}
/**
* 把指定格式的字符串转换为日期对象yyyy-MM-dd HH:mm:ss
*
*/
this.strFormatToDate = function(formatStr, dateStr){
var year = 0;
var start = -1;
var len = dateStr.length;
if((start = formatStr.indexOf('yyyy')) > -1 && start < len){
year = dateStr.substr(start, 4);
}
var month = 0;
if((start = formatStr.indexOf('MM')) > -1 && start < len){
month = parseInt(dateStr.substr(start, 2)) - 1;
}
var day = 0;
if((start = formatStr.indexOf('dd')) > -1 && start < len){
day = parseInt(dateStr.substr(start, 2));
}
var hour = 0;
if( ((start = formatStr.indexOf('HH')) > -1 || (start = formatStr.indexOf('hh')) > 1) && start < len){
hour = parseInt(dateStr.substr(start, 2));
}
var minute = 0;
if((start = formatStr.indexOf('mm')) > -1 && start < len){
minute = dateStr.substr(start, 2);
}
var second = 0;
if((start = formatStr.indexOf('ss')) > -1 && start < len){
second = dateStr.substr(start, 2);
}
return new Date(year, month, day, hour, minute, second);
}
/**
* 日期对象转换为毫秒数
*/
this.dateToLong = function(date){
return date.getTime();
}
/**
* 毫秒转换为日期对象
* @param dateVal number 日期的毫秒数
*/
this.longToDate = function(dateVal){
return new Date(dateVal);
}
/**
* 判断字符串是否为日期格式
* @param str string 字符串
* @param formatStr string 日期格式， 如下 yyyy-MM-dd
*/
this.isDate = function(str, formatStr){
if (formatStr == null){
formatStr = "yyyyMMdd";
}
var yIndex = formatStr.indexOf("yyyy");
if(yIndex==-1){
return false;
}
var year = str.substring(yIndex,yIndex+4);
var mIndex = formatStr.indexOf("MM");
if(mIndex==-1){
return false;
}
var month = str.substring(mIndex,mIndex+2);
var dIndex = formatStr.indexOf("dd");
if(dIndex==-1){
return false;
}
var day = str.substring(dIndex,dIndex+2);
if(!isNumber(year)||year>"2100" || year< "1900"){
return false;
}
if(!isNumber(month)||month>"12" || month< "01"){
return false;
}
if(day>getMaxDay(year,month) || day< "01"){
return false;
}
return true;
}
this.getMaxDay = function(year,month) {
if(month==4||month==6||month==9||month==11)
return "30";
if(month==2)
if(year%4==0&&year%100!=0 || year%400==0)
return "29";
else
return "28";
return "31";
}
/**
* 变量是否为数字
*/
this.isNumber = function(str)
{
var regExp = /^\d+$/g;
return regExp.test(str);
}
/**
* 把日期分割成数组 [年、月、日、时、分、秒]
*/
this.toArray = function(myDate)
{
myDate = arguments[0] || new Date();
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
*/
this.datePart = function(interval, myDate)
{
myDate = arguments[1] || new Date();
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 'm' :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
*/
this.maxDayOfDate = function(date)
{
date = arguments[0] || new Date();
date.setDate(1);
date.setMonth(date.getMonth() + 1);
var time = date.getTime() - 24 * 60 * 60 * 1000;
var newDate = new Date(time);
return newDate.getDate();
}
return this;
}();
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8"/>
<script type="text/javascript" src="./DateUtil.js" ></script>
<script type="text/javascript">
var date = new Date();
document.write("penngo test DateUtil.js=====================" + date + "<br/>");
document.write("date========================================" + date + "<br/>");
document.write("isLeapYear==================================" + DateUtil.isLeapYear(date) + "<br/>");
document.write("dateToStr===================================" + DateUtil.dateToStr('yyyy-MM-dd HH:mm:ss', date) + "<br/>");
document.write("dateAdd('d', 2, date)=======================" + DateUtil.dateToStr('yyyy-MM-dd HH:mm:ss', DateUtil.dateAdd('d', 2, date)) + "<br/>");
var date2 = DateUtil.dateAdd('s', 3, date);
document.write("dateDiff('s', date, date2)==================" + DateUtil.dateDiff('s', date, date2) + "<br/>");
document.write("strToDate('2013-01-16 00:27:23')============" + DateUtil.strToDate('2013-01-16 00:27:23') + "<br/>");
document.write("strFormatToDate=============================" + DateUtil.strFormatToDate('yyyy-MM-dd HH:mm:ss', '2013-01-16 00:27:23') + "<br/>");
document.write("dateToLong==================================" + DateUtil.dateToLong(date) + "<br/>");
document.write("longToDate==================================" + DateUtil.longToDate(DateUtil.dateToLong(date)) + "<br/>");
document.write("isDate('2013-01-16 00:27:23', 'yyyy-MM-dd HH:mm:ss')=" + DateUtil.isDate('2013-01-16', 'yyyy-MM-dd') + "<br/>");
document.write("datePart====================================" + DateUtil.datePart('m', date) + "<br/>");
document.write("maxDayOfDate================================" + DateUtil.maxDayOfDate(date) + "<br/>");
</script>
</head>
<body>
</body>
</html>
===========penngo test DateUtil.js==========
date========================================Wed Jan 16 2013 01:14:23 GMT+0800 (中国标准时间)
isLeapYear==================================false
dateToStr===================================2013-01-16 01:14:23
dateAdd('d', 2, date)=======================2013-01-18 01:14:23
dateDiff('s', date, date2)==================3
strToDate('2013-01-16 00:27:23')============Wed Jan 16 2013 00:27:23 GMT+0800 (中国标准时间)
strFormatToDate=============================Wed Jan 16 2013 00:27:23 GMT+0800 (中国标准时间)
dateToLong==================================1358270063903
longToDate==================================Wed Jan 16 2013 01:14:23 GMT+0800 (中国标准时间)
isDate('2013-01-16 00:27:23', 'yyyy-MM-dd HH:mm:ss')=true
datePart====================================14
maxDayOfDate================================31