js日期的常用操作
//--------------------------------------------------- // 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()+1).toString():'0' + (this.getMonth()+1)); str=str.replace(/M/g,this.getMonth()+1); str=str.replace(/w|W/g,Week); 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.Format('MM/dd/yyyy HH:mm:ss')) + (1000 * Number)); case 'n' :return new Date(Date.parse(dtTmp.Format('MM/dd/yyyy HH:mm:ss')) + (60000 * Number)); case 'h' :return new Date(Date.parse(dtTmp.Format('MM/dd/yyyy HH:mm:ss')) + (3600000 * Number)); case 'd' :return new Date(Date.parse(dtTmp.Format('MM/dd/yyyy HH:mm:ss')) + (86400000 * Number)); case 'w' :return new Date(Date.parse(dtTmp.Format('MM/dd/yyyy HH:mm:ss')) + ((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; } 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+$)/g,''); //去两边空格; if(sDate=='') return true; //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为'' //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式 var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,''); if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D { var t=new Date(sDate.replace(/\-/g,'/')); var ar = sDate.split(/[-/:]/); if(ar != t.getYear() || ar != t.getMonth()+1 || ar != t.getDate()) { //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); return false; } } else { //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); return false; } return true; } //+--------------------------------------------------- //| 日期时间检查 //| 格式为：YYYY-MM-DD HH:MM:SS //+--------------------------------------------------- function CheckDateTime(str) { var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/; var r = str.match(reg); if(r==null)return false; r=r-1; var d= new Date(r,r,r,r,r,r); if(d.getFullYear()!=r)return false; if(d.getMonth()!=r)return false; if(d.getDate()!=r)return false; if(d.getHours()!=r)return false; if(d.getMinutes()!=r)return false; if(d.getSeconds()!=r)return false; return true; } //+--------------------------------------------------- //| 把日期分割成数组 //+--------------------------------------------------- Date.prototype.toArray = function() { var myDate = this; var myArray = Array(); myArray = myDate.getFullYear(); myArray = myDate.getMonth(); myArray = myDate.getDate(); myArray = myDate.getHours(); myArray = myDate.getMinutes(); myArray = 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;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,ary,1)); var date2 = date1.DateAdd('m',1); var result = date1.DateDiff('d',date2); return result; } //+--------------------------------------------------- //| 取得当前日期所在月的第一天 //+--------------------------------------------------- Date.prototype.MounthFirstDay = function() { var myDate = this; var ary = myDate.toArray(); return(new Date(ary,ary,1)); } //+--------------------------------------------------- //| 取得当前日期所在月的最后一天 //+--------------------------------------------------- Date.prototype.MounthLastDay = function() { var myDate = this; var ary = myDate.toArray(); return(new Date(ary,ary,myDate.MaxDayOfDate())); } //+--------------------------------------------------- //| 取得当前日期所在周的第一天 //+--------------------------------------------------- Date.prototype.WeekFirstDay = function() { var myDate = this; var ary = myDate.getDay(); if(ary==0){ return myDate.DateAdd('d',-6); } else { return myDate.DateAdd('d',-ary+1); } } //+--------------------------------------------------- //| 取得当前日期所在周的最后一天 //+--------------------------------------------------- Date.prototype.WeekLastDay = function() { var myDate = this; var ary = myDate.getDay(); if(ary==0){ return myDate; } else { return myDate.DateAdd('d',7-ary); } } //+--------------------------------------------------- //| 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; var month = ary+1; var day = ary; return DatePart('ww', DateValue(''+month+'-'+day+'-'+year+'')); } //+--------------------------------------------------- //| 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(delimCahar); myDate = new Date(arys,arys,arys); } return myDate; } //+--------------------------------------------------- //| 相关操作的快捷封装 //+--------------------------------------------------- function getMyDay(typeId) { var currentTime = new Date(); switch (typeId) { case 1 : //今天 return currentTime.Format('yyyy-MM-dd'); case 2 : //昨天 return currentTime.DateAdd('d',-1).Format('yyyy-MM-dd'); case 3 : //当前月第一天 return currentTime.MounthFirstDay().Format('yyyy-MM-dd'); case 4 : //当前月最后一天 return currentTime.MounthLastDay().Format('yyyy-MM-dd'); case 5 : //当前周第一天 return currentTime.WeekFirstDay().Format('yyyy-MM-dd'); case 6 : //当前周最后一天 return currentTime.WeekLastDay().Format('yyyy-MM-dd'); case 7 : //七天前日期 return currentTime.DateAdd('d',-7).Format('yyyy-MM-dd'); case 8 : //30天前日期 return currentTime.DateAdd('d',-30).Format('yyyy-MM-dd'); case 9 : //上周第一天 return currentTime.DateAdd('w',-1).WeekFirstDay().Format('yyyy-MM-dd'); case 10: //上周最后一天 return currentTime.DateAdd('w',-1).WeekLastDay().Format('yyyy-MM-dd'); case 11 : //上月第一天 return currentTime.DateAdd('m',-1).MounthFirstDay().Format('yyyy-MM-dd'); case 12: //上月最后一天 return currentTime.DateAdd('m',-1).MounthLastDay().Format('yyyy-MM-dd'); case 13: //上月最后一天 return currentTime.Format('yyyy-MM-dd'); } }
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