javascript dateUtil.js

 //---------------------------------------------------<br />// 判斷閏年<br />//---------------------------------------------------<br />Date.prototype.isLeapYear = function()<br />{<br /> return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)));<br />}<br />//---------------------------------------------------<br />// 日期格式化<br />// 格式 YYYY/yyyy/YY/yy 表示年份<br />// MM/M 月份<br />// W/w 星期<br />// dd/DD/d/D 日期<br />// hh/HH/h/H 時間<br />// mm/m 分鐘<br />// ss/SS/s/S 秒<br />//---------------------------------------------------<br />Date.prototype.Format = function(formatStr)<br />{<br /> var str = formatStr;<br /> var Week = ['日','一','二','三','四','五','六']; </p><p> str=str.replace(/yyyy|YYYY/,this.getFullYear());<br /> str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100)); </p><p> str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth());<br /> str=str.replace(/M/g,this.getMonth()); </p><p> str=str.replace(/w|W/g,Week[this.getDay()]); </p><p> str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());<br /> str=str.replace(/d|D/g,this.getDate()); </p><p> str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours());<br /> str=str.replace(/h|H/g,this.getHours());<br /> str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes());<br /> str=str.replace(/m/g,this.getMinutes()); </p><p> str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds());<br /> str=str.replace(/s|S/g,this.getSeconds()); </p><p> return str;<br />} </p><p>//+---------------------------------------------------<br />//| 求兩個時間的天數差 日期格式為 YYYY-MM-dd<br />//+---------------------------------------------------<br />function daysBetween(DateOne,DateTwo)<br />{<br /> var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-'));<br /> var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1);<br /> var OneYear = DateOne.substring(0,DateOne.indexOf ('-')); </p><p> var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-'));<br /> var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1);<br /> var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-')); </p><p> var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);<br /> return Math.abs(cha);<br />} </p><p>//+---------------------------------------------------<br />//| 日期計算<br />//+---------------------------------------------------<br />Date.prototype.DateAdd = function(strInterval, Number) {<br /> var dtTmp = this;<br /> switch (strInterval) {<br /> case 's' :return new Date(Date.parse(dtTmp) + (1000 * Number));<br /> case 'n' :return new Date(Date.parse(dtTmp) + (60000 * Number));<br /> case 'h' :return new Date(Date.parse(dtTmp) + (3600000 * Number));<br /> case 'd' :return new Date(Date.parse(dtTmp) + (86400000 * Number));<br /> case 'w' :return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));<br /> case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());<br /> case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());<br /> case 'y' :return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());<br /> }<br />} </p><p>//+---------------------------------------------------<br />//| 比較日期差 dtEnd 格式為日期型或者 有效日期格式字串<br />//+---------------------------------------------------<br />Date.prototype.DateDiff = function(strInterval, dtEnd) {<br /> var dtStart = this;<br /> if (typeof dtEnd == 'string' )//如果是字串轉換為日期型<br /> {<br /> dtEnd = StringToDate(dtEnd);<br /> }<br /> switch (strInterval) {<br /> case 's' :return parseInt((dtEnd - dtStart) / 1000);<br /> case 'n' :return parseInt((dtEnd - dtStart) / 60000);<br /> case 'h' :return parseInt((dtEnd - dtStart) / 3600000);<br /> case 'd' :return parseInt((dtEnd - dtStart) / 86400000);<br /> case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7));<br /> case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1);<br /> case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear();<br /> }<br />} </p><p>//+---------------------------------------------------<br />//| 日期輸出字串，重載了系統的toString方法<br />//+---------------------------------------------------<br />Date.prototype.toString = function(showWeek)<br />{<br /> var myDate= this;<br /> var str = myDate.toLocaleDateString();<br /> if (showWeek)<br /> {<br /> var Week = ['日','一','二','三','四','五','六'];<br /> str += ' 星期' + Week[myDate.getDay()];<br /> }<br /> return str;<br />} </p><p>//+---------------------------------------------------<br />//| 日期合法性驗證<br />//| 格式為：YYYY-MM-DD或YYYY/MM/DD<br />//+---------------------------------------------------<br />function IsValidDate(DateStr)<br />{<br /> var sDate=DateStr.replace(/(^/s+|/s+$)/g,''); //去兩邊空格;<br /> if(sDate=='') return true;<br /> //如果格式滿足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換為''<br /> //資料庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),資料庫會自動轉換為YYYY-MM-DD格式<br /> var s = sDate.replace(/[/d]{ 4,4 }[/-/]{ 1 }[/d]{ 1,2 }[/-/]{ 1 }[/d]{ 1,2 }/g,'');<br /> if (s=='') //說明格式滿足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D<br /> {<br /> var t=new Date(sDate.replace(//-/g,'/'));<br /> var ar = sDate.split(/[-/:]/);<br /> if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate())<br /> {<br /> //alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');<br /> return false;<br /> }<br /> }<br /> else<br /> {<br /> //alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');<br /> return false;<br /> }<br /> return true;<br />} </p><p>//+---------------------------------------------------<br />//| 日期時間檢查<br />//| 格式為：YYYY-MM-DD HH:MM:SS<br />//+---------------------------------------------------<br />function CheckDateTime(str)<br />{<br /> var reg = /^(/d+)-(/d{ 1,2 })-(/d{ 1,2 }) (/d{ 1,2 }):(/d{ 1,2 }):(/d{ 1,2 })$/;<br /> var r = str.match(reg);<br /> if(r==null)return false;<br /> r[2]=r[2]-1;<br /> var d= new Date(r[1],r[2],r[3],r[4],r[5],r[6]);<br /> if(d.getFullYear()!=r[1])return false;<br /> if(d.getMonth()!=r[2])return false;<br /> if(d.getDate()!=r[3])return false;<br /> if(d.getHours()!=r[4])return false;<br /> if(d.getMinutes()!=r[5])return false;<br /> if(d.getSeconds()!=r[6])return false;<br /> return true;<br />} </p><p>//+---------------------------------------------------<br />//| 把日期分割成數組<br />//+---------------------------------------------------<br />Date.prototype.toArray = function()<br />{<br /> var myDate = this;<br /> var myArray = Array();<br /> myArray[0] = myDate.getFullYear();<br /> myArray[1] = myDate.getMonth();<br /> myArray[2] = myDate.getDate();<br /> myArray[3] = myDate.getHours();<br /> myArray[4] = myDate.getMinutes();<br /> myArray[5] = myDate.getSeconds();<br /> return myArray;<br />} </p><p>//+---------------------------------------------------<br />//| 取得日期資料資訊<br />//| 參數 interval 表示資料類型<br />//| y 年 m月 d日 w星期 ww周 h時 n分 s秒<br />//+---------------------------------------------------<br />Date.prototype.DatePart = function(interval)<br />{<br /> var myDate = this;<br /> var partStr='';<br /> var Week = ['日','一','二','三','四','五','六'];<br /> switch (interval)<br /> {<br /> case 'y' :partStr = myDate.getFullYear();break;<br /> case 'm' :partStr = myDate.getMonth()+1;break;<br /> case 'd' :partStr = myDate.getDate();break;<br /> case 'w' :partStr = Week[myDate.getDay()];break;<br /> case 'ww' :partStr = myDate.WeekNumOfYear();break;<br /> case 'h' :partStr = myDate.getHours();break;<br /> case 'n' :partStr = myDate.getMinutes();break;<br /> case 's' :partStr = myDate.getSeconds();break;<br /> }<br /> return partStr;<br />}</p><p>//+---------------------------------------------------<br />//| 取得當前日期所在月的最大天數<br />//+---------------------------------------------------<br />Date.prototype.MaxDayOfDate = function()<br />{<br /> var myDate = this;<br /> var ary = myDate.toArray();<br /> var date1 = (new Date(ary[0],ary[1]+1,1));<br /> var date2 = date1.dateAdd(1,'m',1);<br /> var result = dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd'));<br /> return result;<br />}</p><p>//+---------------------------------------------------<br />//| 取得當前日期所在周是一年中的第幾周<br />//+---------------------------------------------------<br />Date.prototype.WeekNumOfYear = function()<br />{<br /> var myDate = this;<br /> var ary = myDate.toArray();<br /> var year = ary[0];<br /> var month = ary[1]+1;<br /> var day = ary[2];<br /> document.write('< script language=VBScript/> /n');<br /> document.write('myDate = DateValue(""+month+"-"+day+"-"+year+"") /n');<br /> document.write('result = DatePart("ww", myDate) /n');<br /> document.write(' /n');<br /> return result;<br />}</p><p>//+---------------------------------------------------<br />//| 字串轉成日期類型<br />//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd<br />//+---------------------------------------------------<br />function StringToDate(DateStr)<br />{ </p><p> var converted = Date.parse(DateStr);<br /> var myDate = new Date(converted);<br /> if (isNaN(myDate))<br /> {<br /> //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';<br /> var arys= DateStr.split('-');<br /> myDate = new Date(arys[0],--arys[1],arys[2]);<br /> }<br /> return myDate;<br />}<br />document.write((new Date()).DatePart('h'));