jQuery实现日期字符串格式化

Posted 2020-10-12 菜根谭

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1. js仿后台的字符串的StringFormat方法

function StringFormat() {
         if (arguments.length == 0)
             return null;
         var str = arguments[0];
         for (var i = 1; i < arguments.length; i++) {
             var re = new RegExp(\'\\\\{\' + (i - 1) + \'\\\\}\', \'gm\');
             str = str.replace(re, arguments[i]);
         }
         return str;
}

使用方法与后台的StringFormat方法一样，StringFormat("abc{0}def","123");输出结果为"abc123def"。

2. js实现日期格式化

function Format(now,mask)
    {
        var d = now;
        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);
            }
        });
    };