价格转换工具函数

使用方法

parsePrice('19703000')   // 19,703,000
parsePrice('19703000', true)   // 壹仟玖佰柒拾万叁仟

代码实现

// 价格格式化
export function parsePrice(price, toChinese = false) {
  if (price == null || price === '' || isNaN(price)) return '';
  if (!toChinese) {
    return Number(price).toLocaleString('en-US');
  }

  // 中文大写数字
  const cnNums = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
  const cnIntRadice = ['', '拾', '佰', '仟'];
  const cnIntUnits = ['', '万', '亿'];
  let num = Number(price);
  if (num === 0) return cnNums[0];

  let str = '';
  let unitPos = 0;
  let needZero = false;

  function sectionToChinese(section) {
    let strIns = '', chnStr = '';
    let unitPos = 0;
    let zero = true;
    while (section > 0) {
      let v = section % 10;
      if (v === 0) {
        if (!zero) {
          zero = true;
          chnStr = cnNums[0] + chnStr;
        }
      } else {
        zero = false;
        strIns = cnNums[v] + cnIntRadice[unitPos];
        chnStr = strIns + chnStr;
      }
      unitPos++;
      section = Math.floor(section / 10);
    }
    return chnStr;
  }

  let integerNum = Math.floor(num);
  let unitCount = 0;
  while (integerNum > 0 && unitCount < cnIntUnits.length) {
    let section = integerNum % 10000;
    if (section !== 0) {
      let sectionChinese = sectionToChinese(section);
      if (needZero) {
        str = cnNums[0] + str;
      }
      str = sectionChinese + cnIntUnits[unitCount] + str;
      needZero = section < 1000 && section > 0;
    } else {
      needZero = true;
    }
    integerNum = Math.floor(integerNum / 10000);
    unitCount++;
  }

  // 去除多余的零
  str = str.replace(/零+/g, '零');
  str = str.replace(/零(万|亿)/g, '$1');
  str = str.replace(/亿万/, '亿');
  str = str.replace(/零+$/, '');

  return str;
}