JS函数实现数字转中文大写

- - 1. 数字转字符,分割,去除空字符
  - 2. 遍历分割字符,替换为中文
  - 3. 增加四位数单位
  - 4. 处理零
  - 5. 拼接四位数据和单位

项目中,JS将万亿以下正整数转为中文大写

1. 数字转字符,分割,去除空字符

function toChineseNumber(num){const strs = num.toString().replace(/(?=(\d{4})+$)/g, ",").split(",").filter(Boolean);console.log(strs);
}
toChineseNumber(41231234);

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2. 遍历分割字符,替换为中文

function toChineseNumber(num){const strs = num.toString().replace(/(?=(\d{4})+$)/g, ",").split(",").filter(Boolean);const chinese = ['零','壹','贰','叁','肆','伍','陆','柒','捌','玖']const unit = ['','拾','佰','仟']//处理四位数function _transform(numStr){let result = '';for (let i = 0; i < numStr.length; i++) {const digit = chinese[numStr[i]];console.log(digit);}}for (let i = 0; i < strs.length; i++) {const part = strs[i];_transform(part);}console.log(strs);}toChineseNumber(41231234);

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3. 增加四位数单位

//处理四位数
function _transform(numStr){let result = '';for (let i = 0; i < numStr.length; i++) {const digit = chinese[numStr[i]];const c = unit[numStr.length - 1 - i];result += digit + c;}console.log(result);
}

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4. 处理零

//处理四位数
function _transform(numStr){let result = '';for (let i = 0; i < numStr.length; i++) {const digit = chinese[numStr[i]];const c = unit[numStr.length - 1 - i];if(digit === '零'){if(result[result.length-1] !== chinese[0]){result += digit;}}else{result += digit + c;}}//去除末尾的零if(result[result.length-1] === chinese[0]){result = result.slice(0, -1);}console.log(result);
}

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5. 拼接四位数据和单位

function toChineseNumber(num){const strs = num.toString().replace(/(?=(\d{4})+$)/g, ",").split(",").filter(Boolean);const chinese = ['零','壹','贰','叁','肆','伍','陆','柒','捌','玖']const unit = ['','拾','佰','仟']//处理四位数function _transform(numStr){let result = '';for (let i = 0; i < numStr.length; i++) {const digit = chinese[numStr[i]];const c = unit[numStr.length - 1 - i];if(digit === '零'){if(result[result.length-1] !== chinese[0]){result += digit;}}else{result += digit + c;}}//去除末尾的零if(result[result.length-1] === chinese[0]){result = result.slice(0, -1);}return result;//console.log(result);}let res = "";const bigUnit = ['','万','亿'];for (let i = 0; i < strs.length; i++) {const part = strs[i];//处理中间四位都是零的情况res += _transform(part) ? _transform(part) + bigUnit[strs.length - i - 1] : _transform(part);}console.log(res);console.log(strs);
}
toChineseNumber(402000000340);