formatCurrency 格式化金额

[wljie1010]

function formatCurrency(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + num + '.' + cents);
}
-------------------------------

上面这个javascript 函数的作用是

/**
* 将数值四舍五入(保留2位小数)后格式化成金额形式
*
* @param num 数值(Number或者String)
* @return 金额格式的字符串,如'1,234,567.45'
* @type String
* (num/100)可以改保留的位数
*/
但是当我发现我输入的数值过长就会有些问题。导致结果不正确。
发现我把 12345678901234567 输入进去就得不到正确的结果。我知道是可能 javascript运算符 %，/ ....不支持过大的数，请问我这个该怎么进行修改

[dh20156]

这里有一个比较早前些的，代码长了点：
JS版数字转中文货币大写
http://www.v-ec.com/dh20156/article.asp?id=18

[dh20156]

不过好像也只能支持到千亿，你那个数太大了！

[zzxap]

/**
 * 将数值四舍五入(保留2位小数)后格式化成金额形式
 *
 * @param num 数值(Number或者String)
 * @return 金额格式的字符串,如'1,234,567.45'
 * @type String
 */
function formatCurrency(num) {
    num = num.toString().replace(/\$|\,/g,'');
    if(isNaN(num))
    num = "0";
    sign = (num == (num = Math.abs(num)));
    num = Math.floor(num*100+0.50000000001);
    cents = num%100;
    num = Math.floor(num/100).toString();
    if(cents<10)
    cents = "0" + cents;
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
    num = num.substring(0,num.length-(4*i+3))+','+
    num.substring(num.length-(4*i+3));
    return (((sign)?'':'-') + num + '.' + cents);
}
 
/**
 * 将数值四舍五入(保留1位小数)后格式化成金额形式
 *
 * @param num 数值(Number或者String)
 * @return 金额格式的字符串,如'1,234,567.4'
 * @type String
 */
function formatCurrencyTenThou(num) {
    num = num.toString().replace(/\$|\,/g,'');
    if(isNaN(num))
    num = "0";
    sign = (num == (num = Math.abs(num)));
    num = Math.floor(num*10+0.50000000001);
    cents = num%10;
    num = Math.floor(num/10).toString();
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
    num = num.substring(0,num.length-(4*i+3))+','+
    num.substring(num.length-(4*i+3));
    return (((sign)?'':'-') + num + '.' + cents);
}

[wljie1010]

是啊。但是这个数在系统里面还是有可能的啊。因为不仅仅局限于金额

[zhihuixiaole]

xuexi