js 日期获去及格式化

Js获取当前日期时间及格式化操作

var myDate = new Date();

myDate.getYear();        //获取当前年份(2位)

myDate.getFullYear();    //获取完整的年份(4位,1970-????)

myDate.getMonth();       //获取当前月份(0-11,0代表1月)

myDate.getDate();        //获取当前日(1-31)

myDate.getDay();         //获取当前星期X(0-6,0代表星期天)

myDate.getTime();        //获取当前时间(从1970.1.1开始的毫秒数)

myDate.getHours();       //获取当前小时数(0-23)

myDate.getMinutes();     //获取当前分钟数(0-59)

myDate.getSeconds();     //获取当前秒数(0-59)

myDate.getMilliseconds();    //获取当前毫秒数(0-999)

myDate.toLocaleDateString();     //获取当前日期

var mytime=myDate.toLocaleTimeString();     //获取当前时间

myDate.toLocaleString( );        //获取日期与时间

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：

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

// 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 = Datue(''+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;

}  

 如果要实现这样的时钟：

2012年12月03日 17:21:16 星期一

//本地时钟

function clockon() {

    var now = new Date();

    var year = now.getFullYear(); //getFullYear getYear

    var month = now.getMonth();

    var date = now.getDate();

    var day = now.getDay();

    var hour = now.getHours();

    var minu = now.getMinutes();

    var sec = now.getSeconds();

    var week;

    month = month + 1;

    if (month < 10) month = "0" + month;

    if (date < 10) date = "0" + date;

    if (hour < 10) hour = "0" + hour;

    if (minu < 10) minu = "0" + minu;

    if (sec < 10) sec = "0" + sec;

    var arr_week = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");

    week = arr_week[day];

    var time = "";

    time = year + "年" + month + "月" + date + "日" + " " + hour + ":" + minu + ":" + sec + " " + week;

    $("#bgclock").html(time);

    var timer = setTimeout("clockon()", 200);

}

/**

* 对Date的扩展，将 Date 转化为指定格式的String

* 月(M)、日(d)、12小时(h)、24小时(H)、分(m)、秒(s)、周(E)、季度(q) 可以用 1-2 个占位符

* 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字)

* eg:

* (new Date()).pattern("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423

* (new Date()).pattern("yyyy-MM-dd E HH:mm:ss") ==> 2009-03-10 二 20:09:04

* (new Date()).pattern("yyyy-MM-dd EE hh:mm:ss") ==> 2009-03-10 周二 08:09:04

* (new Date()).pattern("yyyy-MM-dd EEE hh:mm:ss") ==> 2009-03-10 星期二 08:09:04

* (new Date()).pattern("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18

*/

Date.prototype.pattern=function(fmt) {

        var o = {

        "M+" : this.getMonth()+1, //月份

        "d+" : this.getDate(), //日

        "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //小时

        "H+" : this.getHours(), //小时

        "m+" : this.getMinutes(), //分

        "s+" : this.getSeconds(), //秒

        "q+" : Math.floor((this.getMonth()+3)/3), //季度

        "S" : this.getMilliseconds() //毫秒

        };

        var week = {

        "0" : "\u65e5",

        "1" : "\u4e00",

        "2" : "\u4e8c",

        "3" : "\u4e09",

        "4" : "\u56db",

        "5" : "\u4e94",

        "6" : "\u516d"

        };

        if(/(y+)/.test(fmt)){

                fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));

        }

        if(/(E+)/.test(fmt)){

                fmt=fmt.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "\u661f\u671f" : "\u5468") : "")+week[this.getDay()+""]);

        }

        for(var k in o){

                if(new RegExp("("+ k +")").test(fmt)){

                        fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));

                }

        }

        return fmt;

}