使用JavaScript将小写金额转化为大写金额的两种常见方法

方法一：使用正则表达式

//方法一：使用正则表达式
function dealBigMoney(money) {
    if (money === '' || money == null || money === 'undefined') {
        return;
    }

    if (!/^(0|[1-9]\d*)(\.\d+)?$/.test(money)) {
        return "数据非法";
    }

    money = money * 1.0;
    if (money === 0) {
        return "零";
    }

    var unit = "仟佰拾亿仟佰拾万仟佰拾元角分", str = "";
    money += "00";
    var point = money.indexOf('.');
    if (point >= 0) {
        money = money.substring(0, point) + money.substr(point + 1, 2);
    }
    unit = unit.substr(unit.length - money.length);
    for (var i = 0; i < money.length; i++) {
        str += '零壹贰叁肆伍陆柒捌玖'.charAt(money.charAt(i)) + unit.charAt(i);
    }

    var result = str.replace(/零(仟|佰|拾|角)/g, "零").replace(/(零)+/g, "零").replace(/零(万|亿|元)/g, "$1").replace(/(亿)万/g, "$1$2").replace(/^元零?|零分/g, "").replace(/元$/g, "元整");
    return result;
}

方法二:常规JavaScript实现

//方法二:常规JavaScript实现
function dealBigMoney(money) {
    let fraction = ['角', '分'];
    let digit = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
    let unit = [['元', '万', '亿'], ['', '拾', '佰', '仟']];
    let head = money < 0 ? '欠' : '';
    money = Math.abs(money);

    let s = '';

    for (let i = 0; i < fraction.length; i++) {
        s += (digit[Math.floor(money * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');
    }

    s = s || '整';
    money = Math.floor(money);

    for (let i = 0; i < unit[0].length && money > 0; i++) {
        let p = '';
        for (let j = 0; j < unit[1].length && money > 0; j++) {
            p = digit[money % 10] + unit[1][j] + p;
            money = Math.floor(money / 10);
        }
        s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;
    }

    return head + s.replace(/(零.)*零元/, '元').replace(/(零.)+/g, '零').replace(/^整$/, '零元整');
}

原文：https://blog.csdn.net/weixin_41937552/article/details/119996197