javascript 日期對象

來源:互聯網
上載者:User

找到一個介紹js日期對象的文章:

http://blog.csdn.net/xxd851116/article/details/3859587

另外有個指令碼,可以格式化日期的,放在最後。

建立一個日期對象:
var objDate=new Date([arguments list]);
參數形式有以下5種:

new Date("month dd,yyyy hh:mm:ss");
new Date("month dd,yyyy");
new Date(yyyy,mth,dd,hh,mm,ss);
new Date(yyyy,mth,dd);
new Date(ms);

需要注意最後一種形式,參數表示的是需要建立的時間和GMT時間1970年1月1日之間相差的毫秒數。各種函數的含義如下:
month:用英文表示月份名稱,從January到December
mth:用整數表示月份,從0(1月)到11(12月)
dd:表示一個月中的第幾天,從1到31
yyyy:四位元表示的年份
hh:小時數,從0(午夜)到23(晚11點)
mm:分鐘數,從0到59的整數
ss:秒數,從0到59的整數
ms:毫秒數,為大於等於0的整數


new Date("February 3,2009")
new Date("February 3,2009 10:52:03")
new Date(Date.parse("February 3,2009"))
new Date(Date.parse("February 3,2009 10:52:03"))

new Date(2009,1,3)
new Date(2009,1,3,10,52,03)

new Date("2009/02/03");
new Date("2009/02/03 11:12:13");
new Date(Date.parse("2009/02/03"))

new Date("2009-02-03");//Output: NAN
new Date(Date.parse(2009,1,3))//Output: NAN
new Date(Date.parse(2009,1,3,10,52,03))//Output: NAN
 

日期格式化工具:
使用方法:
dateFormat(d, "yyyy-mm-dd");dateFormat(d, "yyyy-mm-dd HH:mm:ss");

工具:

View Code

/* * Date Format 1.2.3 * (c) 2007-2009 Steven Levithan <stevenlevithan.com> * MIT license * * Includes enhancements by Scott Trenda <scott.trenda.net> * and Kris Kowal <cixar.com/~kris.kowal/> * * Accepts a date, a mask, or a date and a mask. * Returns a formatted version of the given date. * The date defaults to the current date/time. * The mask defaults to dateFormat.masks.default. */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 stringsdateFormat.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 stringsdateFormat.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);};
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