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  • js 格式化数字,格式化金额:

    js 格式化数字,格式化金额:

    function number_format(number, decimals, dec_point, thousands_sep) {
        /*
        * 参数说明:
        * number:要格式化的数字
        * decimals:保留几位小数
        * dec_point:小数点符号
        * thousands_sep:千分位符号
        * */
        number = (number + '').replace(/[^0-9+-Ee.]/g, '');
        var n = !isFinite(+number) ? 0 : +number,
            prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
            sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
            dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
            s = '',
            toFixedFix = function (n, prec) {
                var k = Math.pow(10, prec);
                return '' + Math.ceil(n * k) / k;
            };
     
        s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
        var re = /(-?d+)(d{3})/;
        while (re.test(s[0])) {
            s[0] = s[0].replace(re, "$1" + sep + "$2");
        }
     
        if ((s[1] || '').length < prec) {
            s[1] = s[1] || '';
            s[1] += new Array(prec - s[1].length + 1).join('0');
        }
        return s.join(dec);
    }

    使用效果:

    var num=number_format(1234567.089, 2, ".", ",");//1,234,567.09

    再来一个,直接舍去的办法:

    function number_format(number, decimals, dec_point, thousands_sep) {
            /*
            * 参数说明:
            * number:要格式化的数字
            * decimals:保留几位小数
            * dec_point:小数点符号
            * thousands_sep:千分位符号
            * */
            number = (number + '').replace(/[^0-9+-Ee.]/g, '');
            var n = !isFinite(+number) ? 0 : +number,
     
                prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
                sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
                dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
                s = '',
                toFixedFix = function (n, prec) {
                    var k = Math.pow(10, prec);
                    return '' + Math.floor(n * k) / k;
                };
            s = (prec ? toFixedFix(n, prec) : '' + Math.floor(n)).split('.');
            var re = /(-?d+)(d{3})/;
            console.log(s)
            while (re.test(s[0])) {
                s[0] = s[0].replace(re, "$1" + sep + "$2");
            }
     
            if ((s[1] || '').length < prec) {
                s[1] = s[1] || '';
                s[1] += new Array(prec - s[1].length + 1).join('0');
            }
            return s.join(dec);
        }
        number_format(1234567.089, 2, ".", ",");//1,234,567.08
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  • 原文地址:https://www.cnblogs.com/lguow/p/9324380.html
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