chinesmoney/index.js

金额转大写

/**
 * 数字金额转大写
 * @param {*} n 金额，小数保留两位 数字 或者 字符串
 * @returns 大写金额 例如：2.5， 返回：贰元伍角
 */
const chinesMoney = (n) => {
    if (n == 0) {
        return '零'
    }
    if (!/^(\+|-)?(0|[1-9]\d*)(\.\d+)?$/.test(n)) {
        return "数据非法"
    }
    let unit = "仟佰拾亿仟佰拾万仟佰拾元角分"
    let str = ''
    n += '00'
    let a = parseFloat(n);
    if (a < 0) {
        n = n.substr(1)
    }
    let p = n.indexOf('.')
    if (p >= 0) {
        n = n.substring(0, p) + n.substr(p + 1, 2);
    }

    unit = unit.substring(unit.length - n.length)

    for (let i = 0; i < n.length; i++) {
        str += '零壹贰叁肆伍陆柒捌玖'.charAt(n.charAt(i)) + unit.charAt(i)
    }
    if (a > 0) {
        return str.replace(/零(仟|佰|拾|角)/g, "零")
            .replace(/(零)+/g, "零")
            .replace(/零(万|亿|元)/g, "$1")
            .replace(/(亿)万|壹(拾)/g, "$1$2")
            .replace(/^元零?|零分/g, "")
            .replace(/元$/g, "元整")
    }

    return "负" + str.replace(/零(仟|佰|拾|角)/g, "零")
        .replace(/(零)+/g, "零")
        .replace(/零(万|亿|元)/g, "$1")
        .replace(/(亿)万|壹(拾)/g, "$1$2")
        .replace(/^元零?|零分/g, "")
        .replace(/元$/g, "元整")

}

module.exports = chinesMoney