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HomeWeb Front-endJS TutorialHow to extend JS's Date processing function? Extension method of data function in js

本篇文章给大家带来的内容是关于JS的Date处理函数如何进行扩展?js中data函数的扩展方法,有一定的参考价值,有需要的朋友可以参考一下,希望对你有所帮助。

背景:

JS 有自己的 时间类型 Date  —— 但是,在某些情况下 这个对象似乎 不太好用。

本文 基于 JQuery 扩展了一些  JS日期函数,包括:

> 字符串 转 Date 对象 万能函数(性能仅 10W次/s,函数有路径优化,字符串越诡异 耗时越长)

> Date 转 字符串 格式化

> 两个 Date 的差值 (返回的结果类似 C# TimeSpan 对象)

一言不合,直接上代码:

/*感谢 InkFx (C) http://www.ink-fx.com 为 以下日期函数 作出的努力 */
jQuery = window.jQuery || { };

(function($) {


    /*--数据类型转换函数 Start----------------------------------*/

    $.isArray = function(obj) {var result = false;try {result = Object.prototype.toString.apply(obj) === '[object Array]';if (result) return true;} catch(e) {}try {result = obj.constructor === Array;if (result) return true;} catch(e) {}return false;};
    $.toInt = function(obj, dft) {try {dft = (typeof dft === &#39;number&#39;) ? dft : 0;} catch(e) {dft = 0;}try {if (obj == null) return dft;if (typeof obj === &#39;number&#39;) return parseInt(obj);var match = obj.toString().toLowerCase().match(/-*[0123456789abcdefx.]+/);var str = match == null || match.length <= 0 ? null : match[0];var result = null;if (str != null && str.length >= 2 && str.substr(0, 2) == "0x") {str = str.substr(2);result = parseInt(str, 16);} else {result = parseInt(str);}if (result == null || !isFinite(result)) return dft;return result;} catch(e) {return dft;}};
    $.toFloat = function(obj, dft) {try {dft = (typeof dft === &#39;number&#39;) ? dft : 0;} catch(e) {dft = 0;}try {if (obj == null) return dft;if (typeof obj === &#39;number&#39;) return parseFloat(obj);var match = obj.toString().toLowerCase().match(/-*[0123456789abcdefx.]+/);var str = match == null || match.length <= 0 ? null : match[0];var result = null;if (str != null && str.length >= 2 && str.substr(0, 2) == "0x") {str = str.substr(2);result = parseFloat(parseInt(str, 16));} else {result = parseFloat(str);}if (result == null || !isFinite(result)) return dft;return result;} catch(e) {return dft;}};
    $.toString = function(obj, dft) {try {dft = (typeof dft === &#39;string&#39;) ? dft : &#39;&#39;;} catch(e) {dft = &#39;&#39;;}try {if (obj == null) return dft;if (typeof obj === &#39;string&#39;) return obj;return obj.toString();} catch(e) {return dft;}};
    $.toDateTime = function(obj, dft) {try {dft = (dft instanceof Date) ? dft : new Date(1900, 00, 01);} catch(e) {dft = new Date(1900, 00, 01);}try {if (obj == null) return dft;if (obj instanceof Date) return obj;var result = parseDate(obj);if (result == null) return dft;return result;} catch(e) {return dft;}};
    $.toBoolean = function(obj, dft) {try {dft = (typeof dft === &#39;boolean&#39;) ? dft : false;} catch(e) {dft = false;}try {if (obj == null) return dft;if (obj == true) return true;if (obj == false) return false;if ($.isArray(obj)) return obj.length >= 1;if (typeof obj === &#39;boolean&#39;) return obj.toString().toLowerCase() == "true";if (typeof obj === &#39;number&#39;) return parseFloat(obj) > 0;/*if (typeof obj === &#39;string&#39;) return parseFloat(obj) > 0;*/if (obj.toString().toLowerCase() == "t") return true;if (obj.toString().toLowerCase() == "true") return true;return false;} catch(e) {return dft;}};


    /*--数据类型转换函数 End------------------------------------*/
    


    /*--时间相关函数 Start--------------------------------------*/

    $.formatDate = function(date, fmt) {try {date = $.toDateTime(date);fmt = fmt || "yyyy-MM-dd HH:mm:ss"; o = {"M+": date.getMonth() + 1,"d+": date.getDate(),"H+": date.getHours(),"h+": date.getHours() /*(date.getHours() > 12 ? (date.getHours() - 12) : date.getHours())*/,"m+": date.getMinutes(),"s+": date.getSeconds(),"q+": Math.floor((date.getMonth() + 3) / 3),"S": date.getMilliseconds(),"f+": date.getMilliseconds()};if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));for (var k in o)if (new RegExp("(" + k + ")").test(fmt)) {var padLeft = (k == "S" || k == "f+") ? "000" : "00";fmt = fmt.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : (padLeft + o[k]).substr(("" + o[k]).length));}return fmt;} catch(e) { return ""; }};
    $.isLeapYearDate = function(date) {try {date = $.toDateTime(date);return (0 == date.getFullYear() % 4 && ((date.getFullYear() % 100 != 0) || (date.getFullYear() % 400 == 0)));} catch(e) {return false;}};

    $.addYears = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var year = date.getFullYear();var month = date.getMonth();var day = date.getDate();var hour = date.getHours();var minute = date.getMinutes();var second = date.getSeconds();var millisecond = date.getMilliseconds();var result = new Date(year + num, month, day, hour, minute, second, millisecond);return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.addMonths = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var year = date.getFullYear();var month = date.getMonth();var day = date.getDate();var hour = date.getHours();var minute = date.getMinutes();var second = date.getSeconds();var millisecond = date.getMilliseconds();var addYear = (num + month) / 12;month = (num + month) % 12;var result = new Date(year + addYear, month, day, hour, minute, second, millisecond);return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.addDays = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var result = new Date(date.valueOf() + (num * 1000 * 60 * 60 * 24));return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.addHours = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var result = new Date(date.valueOf() + (num * 1000 * 60 * 60));return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.addMinutes = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var result = new Date(date.valueOf() + (num * 1000 * 60));return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.addSeconds = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var result = new Date(date.valueOf() + (num * 1000));return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.addMilliseconds = function(date, num) {try {date = $.toDateTime(date);num = $.toInt(num);var result = new Date(date.valueOf() + num);return result;} catch(e) { return new Date(1900, 01, 01); }};
    $.getTimeSpan = function(date1, date2) {var timestamp = 0;if((date1 instanceof Date || date2 instanceof Date || date2 == null) || (date1 != null && date2 != null)) {date1 = $.toDateTime(date1);date2 = $.toDateTime(date2);timestamp = $.toFloat(date1 - date2);} else {timestamp = $.toInt(date1);}var temp = $.toInt(timestamp / 1000);var totalMilliSecond = timestamp;var totalSecond = timestamp / (1000);var totalMinute = timestamp / (1000 * 60);var totalHour = timestamp / (1000 * 60 * 60);var totalDay = timestamp / (1000 * 60 * 60 * 24);var milliSecond = $.toInt(totalMilliSecond) % 1000;var second = $.toInt(totalSecond) % 60;var minute = $.toInt(totalMinute) % 60;var hour = $.toInt(totalHour) % 24;var day = $.toInt(totalDay);return {TimeStamp: timestamp,Days: day,Hours: hour,Minutes: minute,Seconds: second,Milliseconds: milliSecond,TotalDays: totalDay,TotalHours: totalHour,TotalMinutes: totalMinute,TotalSeconds: totalSecond,TotalMilliseconds: totalMilliSecond,valueOf: function() { return this.TimeStamp; },toString: function() { return this.Days + "." + $.padLeft(this.Hours, 2, "0") + ":" + $.padLeft(this.Minutes, 2, "0") + ":" + $.padLeft(this.Seconds, 2, "0") + "." + $.padLeft(this.Milliseconds, 3, "0"); } };}

    /*--时间相关函数 End----------------------------------------*/


})(jQuery);

代码比较长,当时我写完之后,顺手就把 JS压缩了。

代码调用如下:

var begin = new Date();

            //执行15W次 自动识别转换:

            //i3 CPU
            //Chrome: 5秒   平均: 30000次/s
            //IE 9  : 26秒  平均: 5770次/s
            //i5 CPU
            //Chrome: 14秒 20*100000次 平均: 107000次/s
            for (var i = 0; i < 10000; i++) {
                var result1 = $.toDateTime("2017-03-19 01:43:15 123453");
                var result2 = $.toDateTime("2017-03-19T01:43:15 123453");
                var result3 = $.toDateTime("2017-03-19");
                var result4 = $.toDateTime("2017/03/19 01:43:15");
                var result5 = $.toDateTime("03/19/2017 01:43:15");
                var result6 = $.toDateTime("03/19/2017 01:43");
                var result7 = $.toDateTime("01:43:15 123453");
                var result8 = $.toDateTime("01:43:15.123453");
                var result9 = $.toDateTime("01:43:15");
                var result10 = $.toDateTime("01:43");
                var result11 = $.toDateTime("2017/03/19");
                var result12 = $.toDateTime("03/19/2017");
                var result13 = $.toDateTime("Mon Mar 20 2017 02:46:06 GMT+0800 (中国标准时间)");
                var result14 = $.toDateTime("Mon Mar 20 02:46:06 UTC+0800 2017");
                var result15 = $.toDateTime("Mon Mar 20 2017 02:46:06");
                var result16 = $.toDateTime("2017年3月19日 01时43分15秒");
                var result17 = $.toDateTime("2017年03月19日01:43:15");
                var result18 = $.toDateTime("2017年03月19日 01:43");
                var result19 = $.toDateTime("2017年03月19日");
                var result20 = $.toDateTime("1时43分15秒");
            }

            var end = new Date();
            document.writeln(
                "计算 " + (i) + "*20次, 耗时:"
                + "<br/>" + begin.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/>" + end.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/>" + "计算结果: "
                + "<br/> $.toDateTime(\"2017-03-19 01:43:15 123453\") >> " + result1.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017-03-19T01:43:15 123453\") >> " + result2.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017-03-19\") >> " + result3.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017/03/19 01:43:15\") >> " + result4.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"03/19/2017 01:43:15\") >> " + result5.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"03/19/2017 01:43\") >> " + result6.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"01:43:15 123453\") >> " + result7.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"01:43:15.123453\") >> " + result8.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"01:43:15\") >> " + result9.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"01:43\") >> " + result10.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017/03/19\") >> " + result11.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"03/19/2017\") >> " + result12.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"Mon Mar 20 2017 02:46:06 GMT+0800 (中国标准时间)\") >> " + result13.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"Mon Mar 20 02:46:06 UTC+0800 2017\") >> " + result14.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"Mon Mar 20 2017 02:46:06\") >> " + result15.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017年3月19日 01时43分15秒\") >> " + result16.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017年03月19日01:43:15\") >> " + result17.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017年03月19日 01:43\") >> " + result18.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"2017年03月19日\") >> " + result19.format("yyyy-MM-dd HH:mm:ss fff")
                + "<br/> $.toDateTime(\"1时43分15秒\") >> " + result20.format("yyyy-MM-dd HH:mm:ss fff")
            );

上面的代码中:

"Mon Mar 20 2017 02:46:06 GMT+0800 (中国标准时间)"
"Mon Mar 20 02:46:06 UTC+0800 2017"
"Mon Mar 20 2017 02:46:064 
这三种,分别是 Chrome FireFox IE 的 Date 对象 toString() 的结果。
万能函数 也已经进行了反向解析支持。

PS.
看客不禁哈哈大笑:“除非有BUG,否则这种 Date.toString() 的字符串 根本就不该出现在程序中。”

如果您觉得 这三种 字符串类型 不会出现。
—— 那我们看看 大名鼎鼎的 element-ui 库中,DatePicker 控件 是如何 闹心的:

http://element-cn.eleme.io/1.4/#/zh-CN/component/date-picker

http://element-cn.eleme.io/2.4/#/zh-CN/component/date-picker (新版已经修正了BUG)


 无一例外:控件的值 不能直接获取,只能通过 change 事件取值。

如何获取时间差:

var timeSpan = $.getTimeSpan("2017-03-27 21:20:05 000", "2017-03-25 10:10:10 000");
alert(timeSpan); //日期比较 是可以直接使用 > < 的
alert(timeSpan.TotalDays); //两个时间相差的天数(有小数,比如 1.5天)
alert(timeSpan.TotalHours); //两个时间相差的小时数(有小数)
alert(timeSpan.TotalMinutes); //两个时间相差的分钟数(有小数)
alert(timeSpan.TotalSeconds); //两个时间相差的秒数(有小数)
alert(timeSpan.TotalMilliseconds); //两个时间相差的毫秒数(有小数)


alert($.addYears("2017-03-27 21:20:05 123456", 5));  //在指定时间基础上,增加 5 年
alert($.addMonths("2017-03-27 21:20:05 123456", 48));  //在指定时间基础上,增加 48 月
alert($.addDays("2017-03-27 21:20:05 123456", 365));  //在指定时间基础上,增加 365 天
alert($.addHours("2017-03-27 21:20:05 123456", 48));  //在指定时间基础上,增加 48 消失
alert($.addMinutes("2017-03-27 21:20:05 123456", 120));  //在指定时间基础上,增加 120分钟
alert($.addSeconds("2017-03-27 21:20:05 123456", 480));  //在指定时间基础上,增加 480秒
alert($.addMilliseconds("2017-03-27 21:20:05 123456", 10300));  //在指定时间基础上,增加 10300毫秒

是的, JS 的 Date 对象, 好多你需要但是 底层不提供的 函数 —— 本文 都已经提供。

相关推荐:

PHP变量与类型扩展之函数处理及变量处理

JS字符串函数扩展代码_javascript技巧

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