js日期时间函数

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

js 代码

//---------------------------------------------------   

// 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;   

}