tyro-util/lib/numToCN.js

前端常用工具库

/**
 * @desc   数字现金转中文
 * @param  {Number} n
 * @return {String}
 */
const numToCN = n => {
  var fraction = ['角', '分']
  var digit = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖']
  var unit = [
    ['元', '万', '亿'],
    ['', '拾', '佰', '仟'],
  ]
  var head = n < 0 ? '欠' : ''
  n = Math.abs(n)
  var s = ''
  for (var i = 0; i < fraction.length; i++) {
    s += (
      digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]
    ).replace(/零./, '')
  }
  s = s || '整'
  n = Math.floor(n)
  for (var i = 0; i < unit[0].length && n > 0; i++) {
    var p = ''
    for (var j = 0; j < unit[1].length && n > 0; j++) {
      p = digit[n % 10] + unit[1][j] + p
      n = Math.floor(n / 10)
    }
    s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s
  }
  return (
    head +
    s
      .replace(/(零.)*零元/, '元')
      .replace(/(零.)+/g, '零')
      .replace(/^整$/, '零元整')
  )
}

module.exports = numToCN