111 lines
2.8 KiB
TypeScript
111 lines
2.8 KiB
TypeScript
// utils/amountToChinese.js
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export function amountToChinese(money) {
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// 1. 参数处理
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if (money === '' || money === null || money === undefined || isNaN(money)) {
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return '';
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}
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// 2. 金额验证
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if (Math.abs(money) > 9999999999999.99) {
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throw new Error('金额超出范围 (最大: 9999999999999.99)');
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}
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// 3. 定义常量
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const CN_NUMBERS = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
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const CN_INTEGER_UNIT = ['', '拾', '佰', '仟'];
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const CN_GROUP_UNIT = ['', '万', '亿', '兆'];
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const CN_DECIMAL_UNIT = ['角', '分'];
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const CN_FULL = '整';
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const CN_NEGATIVE = '负';
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const CN_YUAN = '元';
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// 4. 处理符号
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let isNegative = false;
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if (money < 0) {
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isNegative = true;
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money = Math.abs(money);
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}
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// 5. 格式化为两位小数
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let moneyStr = parseFloat(money).toFixed(2);
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// 6. 分离整数和小数
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const [integerPart, decimalPart] = moneyStr.split('.');
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// 7. 转换整数部分
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let chineseStr = '';
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if (parseInt(integerPart, 10) > 0) {
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// 按4位一组分割
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const groups = [];
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for (let i = integerPart.length; i > 0; i -= 4) {
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groups.push(integerPart.substring(Math.max(0, i - 4), i));
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}
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// 处理每一组
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for (let i = 0; i < groups.length; i++) {
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let groupStr = '';
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const group = groups[i].split('').reverse().join('');
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let hasZero = false;
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for (let j = 0; j < group.length; j++) {
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const digit = parseInt(group[j], 10);
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const unit = CN_INTEGER_UNIT[j];
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if (digit === 0) {
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if (!hasZero && j !== 0) {
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groupStr = CN_NUMBERS[0] + groupStr;
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hasZero = true;
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}
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} else {
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groupStr = CN_NUMBERS[digit] + unit + groupStr;
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hasZero = false;
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}
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}
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// 去除尾部的零
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groupStr = groupStr.replace(/零+$/, '');
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// 添加组单位（万、亿、兆）
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if (groupStr) {
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groupStr += CN_GROUP_UNIT[i];
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}
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chineseStr = groupStr + chineseStr;
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}
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chineseStr += CN_YUAN;
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}
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// 8. 转换小数部分
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if (decimalPart) {
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const decInt = parseInt(decimalPart, 10);
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if (decInt > 0) {
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for (let i = 0; i < decimalPart.length; i++) {
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const digit = parseInt(decimalPart[i], 10);
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if (digit > 0) {
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chineseStr += CN_NUMBERS[digit] + CN_DECIMAL_UNIT[i];
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}
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}
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}
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}
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// 9. 清理多余的零
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chineseStr = chineseStr
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.replace(/零+/g, '零')
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.replace(/零([万亿兆])/g, '$1')
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.replace(/零元/g, '元')
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.replace(/元零?$/, '元');
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// 10. 添加"整"或处理负数
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if (!chineseStr.includes('角') && !chineseStr.includes('分')) {
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chineseStr += CN_FULL;
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}
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if (isNegative) {
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chineseStr = CN_NEGATIVE + chineseStr;
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}
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return chineseStr;
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}
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