wlitd-utils/dist/index.js

数字或字符串转中文大写金额

import Decimal from 'decimal.js';
function toRMB(num) {
    const chineseNum = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
    let result = '';
    // 转为大数
    let decimal = new Decimal(num);
    // 处理负数
    if (decimal.lessThan(0)) {
        result += '负';
        decimal = decimal.abs();
    }
    // 分离整数和小数
    const [integerStr, decimalStr] = decimal.toFixed(2, Decimal.ROUND_DOWN).split('.');
    const decimalNum = Number.parseInt(decimalStr);
    // 处理整数部分
    const integerUnit = ['', '拾', '佰', '仟'];
    const bigIntegerUnit = ['', '万', '亿'];
    let integerPartChinese = '';
    if (integerStr.length === 0) {
        result += '零';
    }
    else {
        let zeroCount = 0;
        for (let i = 0; i < integerStr.length; i++) {
            const index = integerStr.length - i - 1;
            const unit = integerUnit[index % 4];
            const bigIndex = Math.floor(index / 4);
            let bigUnit = '';
            // 大数万万化
            bigUnit = bigIndex >= bigIntegerUnit.length ? '万'.repeat(bigIndex - 2) : bigIntegerUnit[bigIndex];
            const digit = Number.parseInt(integerStr[i]);
            if (digit !== 0) {
                if (zeroCount > 0) {
                    integerPartChinese += '零';
                    zeroCount = 0;
                }
                integerPartChinese += `${chineseNum[digit]}${unit}${unit === '' ? bigUnit : ''}`;
            }
            else {
                zeroCount++;
                if (!unit) {
                    integerPartChinese += bigUnit;
                }
            }
        }
        result += integerPartChinese;
    }
    result += '元';
    // 处理小数部分
    const decimalUnit = ['角', '分'];
    if (decimalNum > 0) {
        let decimalPartChinese = '';
        for (let i = 0; i < decimalStr.length; i++) {
            const digit = decimalStr[i];
            decimalPartChinese += `${chineseNum[Number.parseInt(digit)]}${decimalUnit[i]}`;
        }
        // 此处不可能存在零角零分的情况，所以零角去掉角，零分直接去掉
        decimalPartChinese = decimalPartChinese.replace(/零角/, '零').replace(/零分/, '');
        result += decimalPartChinese;
    }
    else {
        result += '整';
    }
    return result;
}
export function strToRMB(numStr) {
    if (typeof numStr !== 'string' || !/^-?\d*(\.\d*)?$/.test(numStr)) {
        throw new Error('Invalid number string!');
    }
    return toRMB(numStr);
}
export function numToRMB(num) {
    if (typeof num !== 'number' || Number.isNaN(num)) {
        throw new Error('Invalid number!');
    }
    return toRMB(num);
}