javascript Date format(js日期格式化)

//对Date的扩展，将 Date转化为指定格式的String  

//月(M)、日(d)、小时(h)、分(m)、秒(s)、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)  

//例子：  

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

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

Date.PRototype.Format = function(fmt)  

{ //author: meizz  

 var o = {  

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

   "d+": this.getDate(),                    //日  

   "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  

 };  

 if(/(y+)/.test(fmt))  

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

 for(var k ino)  

   if(newRegExp("("+ k +")").test(fmt))  

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

 return fmt;  

} 

调用方法：

var time1 = new Date().format("yyyy-MM-ddHH:mm:ss");    

var time2 = newDate().format("yyyy-MM-dd"); 

方法二：

<mce:script language="javascript"type="text/Javascript"><!-- 

/**      

 *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:      

 * (newDate()).pattern("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-0208:09:04.423      

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

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

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

 * (newDate()).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 ino){          

       if(newRegExp("("+ k +")").test(fmt)){          

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

       }          

   }          

   returnfmt;          

}        

var date = new Date();       

window.alert(date.pattern("yyyy-MM-ddhh:mm:ss")); 

// --></mce:script>     

方法三：

Date.prototype.format = function(mask) {       

   var d =this;       

   var zeroize =function (value, length) {       

       if(!length) length = 2;       

       value =String(value);       

       for (var i= 0, zeros = ''; i < (length - value.length); i++) {       

           zeros+= '0';       

       }       

       returnzeros + value;       

   };         

   returnmask.replace(/"[^"]*"|'[^']*'|/b(?:d{1,4}|m{1,4}|yy(?:yy)?|([hHMstT])/1?|[lLZ])/b/g,function($0) {       

       switch($0){       

           case'd':   return d.getDate();       

           case'dd':  return zeroize(d.getDate());       

           case'ddd': return ['Sun','Mon','Tue','Wed','Thr','Fri','Sat'][d.getDay()];       

           case'dddd':    return['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'][d.getDay()];       

           case'M':   return d.getMonth() + 1;       

           case'MM':  return zeroize(d.getMonth() +1);       

           case'MMM': return['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'][d.getMonth()];       

           case'MMMM':    return['January','February','March','April','May','June','July','August','September','October','November','December'][d.getMonth()];       

           case'yy':  returnString(d.getFullYear()).substr(2);       

           case'yyyy':    return d.getFullYear();       

           case'h':   return d.getHours() % 12 ||12;       

           case'hh':  return zeroize(d.getHours() % 12|| 12);       

           case'H':   return d.getHours();       

           case'HH':  return zeroize(d.getHours());       

           case'm':   return d.getMinutes();       

           case'mm':  returnzeroize(d.getMinutes());       

           case's':   return d.getSeconds();       

           case'ss':  returnzeroize(d.getSeconds());       

           case'l':   returnzeroize(d.getMilliseconds(), 3);       

           case 'L':   var m = d.getMilliseconds();       

                   if (m > 99) m = Math.round(m / 10);       

                   return zeroize(m);       

           case'tt':  return d.getHours() < 12 ? 'am': 'pm';       

           case'TT':  return d.getHours() < 12 ? 'AM': 'PM';       

           case'Z':   returnd.toUTCString().match(/[A-Z]+$/);       

           //Return quoted strings with the surrounding quotes removed       

           default:   return $0.substr(1,$0.length - 2);       

       }       

   });       

};