[转载]JavaScript Date时间类型格式化

格式化方法：

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var dateFormat = function () {     var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,         timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,         timezoneClip = /[^-+\dA-Z]/g,         pad = function (val, len) {             val = String(val);             len = len || 2;             while (val.length < len) val = "0" + val;             return val;         };       // Regexes and supporting functions are cached through closure     return function (date, mask, utc) {         var dF = dateFormat;           // You can't provide utc if you skip other args (use the "UTC:" mask prefix)         if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {             mask = date;             date = undefined;         }           // Passing date through Date applies Date.parse, if necessary         date = date ? new Date(date) : new Date;         if (isNaN(date)) throw SyntaxError("invalid date");           mask = String(dF.masks[mask] || mask || dF.masks["default"]);           // Allow setting the utc argument via the mask         if (mask.slice(0, 4) == "UTC:") {             mask = mask.slice(4);             utc = true;         }           var _ = utc ? "getUTC" : "get",             d = date[_ + "Date"](),             D = date[_ + "Day"](),             m = date[_ + "Month"](),             y = date[_ + "FullYear"](),             H = date[_ + "Hours"](),             M = date[_ + "Minutes"](),             s = date[_ + "Seconds"](),             L = date[_ + "Milliseconds"](),             o = utc ? 0 : date.getTimezoneOffset(),             flags = {                 d:    d,                 dd:   pad(d),                 ddd:  dF.i18n.dayNames[D],                 dddd: dF.i18n.dayNames[D + 7],                 m:    m + 1,                 mm:   pad(m + 1),                 mmm:  dF.i18n.monthNames[m],                 mmmm: dF.i18n.monthNames[m + 12],                 yy:   String(y).slice(2),                 yyyy: y,                 h:    H % 12 || 12,                 hh:   pad(H % 12 || 12),                 H:    H,                 HH:   pad(H),                 M:    M,                 MM:   pad(M),                 s:    s,                 ss:   pad(s),                 l:    pad(L, 3),                 L:    pad(L > 99 ? Math.round(L / 10) : L),                 t:    H < 12 ? "a"  : "p",                 tt:   H < 12 ? "am" : "pm",                 T:    H < 12 ? "A"  : "P",                 TT:   H < 12 ? "AM" : "PM",                 Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),                 o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),                 S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]             };           return mask.replace(token, function ($0) {             return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);         });     }; }();   // Some common format strings dateFormat.masks = {     "default":      "ddd mmm dd yyyy HH:MM:ss",     shortDate:      "m/d/yy",     mediumDate:     "mmm d, yyyy",     longDate:       "mmmm d, yyyy",     fullDate:       "dddd, mmmm d, yyyy",     shortTime:      "h:MM TT",     mediumTime:     "h:MM:ss TT",     longTime:       "h:MM:ss TT Z",     isoDate:        "yyyy-mm-dd",     isoTime:        "HH:MM:ss",     isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",     isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'" };   // Internationalization strings dateFormat.i18n = {     dayNames: [         "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",         "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"     ],     monthNames: [         "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",         "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"     ] };   // For convenience... Date.prototype.format = function (mask, utc) {     return dateFormat(this, mask, utc); };

使用方式如下：

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var now = new Date();   now.format("m/dd/yy"); // Returns, e.g., 6/09/07   // Can also be used as a standalone function dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT"); // Saturday, June 9th, 2007, 5:46:21 PM   // You can use one of several named masks now.format("isoDateTime"); // 2007-06-09T17:46:21   // ...Or add your own dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"'; now.format("hammerTime"); // 17:46! Can't touch this!   // When using the standalone dateFormat function, // you can also provide the date as a string dateFormat("Jun 9 2007", "fullDate"); // Saturday, June 9, 2007   // Note that if you don't include the mask argument, // dateFormat.masks.default is used now.format(); // Sat Jun 09 2007 17:46:21   // And if you don't include the date argument, // the current date and time is used dateFormat(); // Sat Jun 09 2007 17:46:22   // You can also skip the date argument (as long as your mask doesn't // contain any numbers), in which case the current date/time is used dateFormat("longTime"); // 5:46:22 PM EST   // And finally, you can convert local time to UTC time. Either pass in // true as an additional argument (no argument skipping allowed in this case): dateFormat(now, "longTime", true); now.format("longTime", true); // Both lines return, e.g., 10:46:21 PM UTC   // ...Or add the prefix "UTC:" to your mask. now.format("UTC:h:MM:ss TT Z"); // 10:46:21 PM UTC

转载自：http://blog.csdn.net/zhensoft163/article/details/40632743