格式化金额-四舍五入(这个方法有bug)
1 function number_format(number, decimals, dec_point, thousands_sep) { 2 /* 3 * 参数说明: 4 * number:要格式化的数字 5 * decimals:保留几位小数 6 * dec_point:小数点符号 7 * thousands_sep:千分位符号 8 * */ 9 number = (number + '').replace(/[^0-9+-Ee.]/g, ''); 10 var n = !isFinite(+number) ? 0 : +number, 11 prec = !isFinite(+decimals) ? 0 : Math.abs(decimals), 12 sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep, 13 dec = (typeof dec_point === 'undefined') ? '.' : dec_point, 14 s = '', 15 toFixedFix = function (n, prec) { 16 var k = Math.pow(10, prec); 17 return '' + Math.ceil(n * k) / k; 18 }; 19 20 s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.'); 21 var re = /(-?d+)(d{3})/; 22 while (re.test(s[0])) { 23 s[0] = s[0].replace(re, "$1" + sep + "$2"); 24 } 25 26 if ((s[1] || '').length < prec) { 27 s[1] = s[1] || ''; 28 s[1] += new Array(prec - s[1].length + 1).join('0'); 29 } 30 return s.join(dec); 31 }
使用:
1 var num=number_format(1234567.089, 2, ".", ",");//1,234,567.09
var num=number_format(2.2, 2, ".", ",");//2.21
总会加上0.01,记录下,不建议使用
格式化-直接舍去(可用)
1 function number_format(number, decimals, dec_point, thousands_sep) { 2 /* 3 * 参数说明: 4 * number:要格式化的数字 5 * decimals:保留几位小数 6 * dec_point:小数点符号 7 * thousands_sep:千分位符号 8 * */ 9 number = (number + '').replace(/[^0-9+-Ee.]/g, ''); 10 var n = !isFinite(+number) ? 0 : +number, 11 12 prec = !isFinite(+decimals) ? 0 : Math.abs(decimals), 13 sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep, 14 dec = (typeof dec_point === 'undefined') ? '.' : dec_point, 15 s = '', 16 toFixedFix = function (n, prec) { 17 var k = Math.pow(10, prec); 18 return '' + Math.floor(n * k) / k; 19 }; 20 s = (prec ? toFixedFix(n, prec) : '' + Math.floor(n)).split('.'); 21 var re = /(-?d+)(d{3})/; 22 console.log(s) 23 while (re.test(s[0])) { 24 s[0] = s[0].replace(re, "$1" + sep + "$2"); 25 } 26 27 if ((s[1] || '').length < prec) { 28 s[1] = s[1] || ''; 29 s[1] += new Array(prec - s[1].length + 1).join('0'); 30 } 31 return s.join(dec); 32 } 33 number_format(1234567.089, 2, ".", ",");//1,234,567.08
格式化-四舍五入(可用)
function fmoney(s, n) { n = n > 0 && n <= 20 ? n : 2; s = parseFloat((s + "").replace(/[^d.-]/g, "")).toFixed(n) + ""; let l = s.split(".")[0].split("").reverse(), r = s.split(".")[1]; let t = ""; for (let i = 0; i < l.length; i++) { t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : ""); } return t.split("").reverse().join("") + "." + r; } function rmoney(s) { return parseFloat(s.replace(/[^d.-]/g, "")); }