本文介绍JavaScript中日期时间的操作方法，包括获取当前日期时间、格式化日期、计算日期差等实用技巧。通过这些方法，开发者可以更高效地处理网页中的日期时间数据。
Js获取当前日期时间及其它操作
var myDate = new Date();
myDate.getYear(); <wbr><wbr><wbr><wbr><wbr><wbr><wbr>//获取当前年份(2位)<br> myDate.getFullYear(); <wbr><wbr><wbr>//获取完整的年份(4位,1970-????)<br> myDate.getMonth(); <wbr><wbr><wbr><wbr><wbr><wbr>//获取当前月份(0-11,0代表1月)<br> myDate.getDate(); <wbr><wbr><wbr><wbr><wbr><wbr><wbr>//获取当前日(1-31)<br> myDate.getDay(); <wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>//获取当前星期X(0-6,0代表星期天)<br> myDate.getTime(); <wbr><wbr><wbr><wbr><wbr><wbr><wbr>//获取当前时间(从1970.1.1开始的毫秒数)<br> myDate.getHours(); <wbr><wbr><wbr><wbr><wbr><wbr>//获取当前小时数(0-23)<br> myDate.getMinutes(); <wbr><wbr><wbr><wbr>//获取当前分钟数(0-59)<br> myDate.getSeconds(); <wbr><wbr><wbr><wbr>//获取当前秒数(0-59)<br> myDate.getMilliseconds(); <wbr><wbr><wbr>//获取当前毫秒数(0-999)<br> myDate.toLocaleDateString(); <wbr><wbr><wbr><wbr>//获取当前日期<br> var mytime=myDate.toLocaleTimeString(); <wbr><wbr><wbr><wbr>//获取当前时间<br> myDate.toLocaleString( ); <wbr><wbr><wbr><wbr><wbr><wbr><wbr>//获取日期与时间</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
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日期时间脚本库方法列表
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
js代码：
//--------------------------------------------------- <wbr><wbr><br> // 判断闰年 <wbr><wbr><br> //--------------------------------------------------- <wbr><wbr><br> Date.prototype.isLeapYear = function() <wbr><wbr><wbr><br> { <wbr><wbr><wbr><br><wbr><wbr><wbr>return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0))); <wbr><wbr><wbr><br> } <wbr><wbr><wbr><br><wbr><wbr><br> //--------------------------------------------------- <wbr><wbr><br> // 日期格式化 <wbr><wbr><br> // 格式 YYYY/yyyy/YY/yy 表示年份 <wbr><wbr><br> // MM/M 月份 <wbr><wbr><br> // W/w 星期 <wbr><wbr><br> // dd/DD/d/D 日期 <wbr><wbr><br> // hh/HH/h/H 时间 <wbr><wbr><br> // mm/m 分钟 <wbr><wbr><br> // ss/SS/s/S 秒 <wbr><wbr><br> //--------------------------------------------------- <wbr><wbr><br> Date.prototype.Format = function(formatStr) <wbr><wbr><wbr><br> { <wbr><wbr><wbr><br><wbr><wbr><wbr>var str = formatStr; <wbr><wbr><wbr><br><wbr><wbr><wbr>var Week = ['日','一','二','三','四','五','六']; <wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/yyyy|YYYY/,this.getFullYear()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100)); <wbr><wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/M/g,this.getMonth()); <wbr><wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/w|W/g,Week[this.getDay()]); <wbr><wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/d|D/g,this.getDate()); <wbr><wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/h|H/g,this.getHours()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/m/g,this.getMinutes()); <wbr><wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds()); <wbr><wbr><wbr><br><wbr><wbr><wbr>str=str.replace(/s|S/g,this.getSeconds()); <wbr><wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>return str; <wbr><wbr><wbr><br> } <wbr><wbr><wbr><br><wbr><wbr><br> //+--------------------------------------------------- <wbr><wbr><br> //| 求两个时间的天数差 日期格式为 YYYY-MM-dd <wbr><wbr><wbr><br> //+--------------------------------------------------- <wbr><wbr><br> function daysBetween(DateOne,DateTwo) <wbr><wbr><br> { <wbr><wbr><wbr><br><wbr><wbr><wbr>var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-')); <wbr><wbr><br><wbr><wbr><wbr>var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1); <wbr><wbr><br><wbr><wbr><wbr>var OneYear = DateOne.substring(0,DateOne.indexOf ('-')); <wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-')); <wbr><wbr><br><wbr><wbr><wbr>var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1); <wbr><wbr><br><wbr><wbr><wbr>var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-')); <wbr><wbr><br><wbr><wbr><br><wbr><wbr><wbr>var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000); <wbr><wbr><wbr><br><wbr><wbr><wbr>return Math.abs(cha); <wbr><wbr><br> } <wbr><wbr><br><wbr><wbr><br><wbr><wbr><br> //+--------------------------------------------------- <wbr><wbr><br> //| 日期计算 <wbr><wbr><br> //+--------------------------------------------------- <wbr><wbr><br> Date.prototype.DateAdd = function(strInterval, Number) { <wbr><wbr><wbr><br><wbr><wbr><wbr>var dtTmp = this; <wbr><wbr><br><wbr><wbr><wbr>switch (strInterval) { <wbr><wbr><wbr><br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
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