javascript Date format(js日期格式化)

浏览数：31 / 时间：2015年06月09日

// 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 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;
}

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

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

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

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‘;

        }

        return zeros + value;

    };

    return mask.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‘: return String(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‘: return zeroize(d.getMinutes());

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

            case ‘ss‘: return zeroize(d.getSeconds());

            case ‘l‘:   return zeroize(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‘:   return d.toUTCString().match(/[A-Z]+$/);

            // Return quoted strings with the surrounding quotes removed

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

        }

    });

};