js數(shù)字金額大寫(xiě)轉(zhuǎn)換，傳入值number類(lèi)型或string類(lèi)型

export function convertNumberToChinese(amount: number | string) {
  let n = Number(amount)
  let fraction = ['角', '分']
  let digit = ['零', '壹', '貳', '叁', '肆', '伍', '陸', '柒', '捌', '玖']
  let unit = [
    ['元', '萬(wàn)', '億'],
    ['', '拾', '佰', '仟'],
  ]
  let head = n < 0 ? '欠' : ''
  n = Math.abs(n)
  let s = ''
  for (let i = 0; i < fraction.length; i++) {
    s += (digit[Math.floor(shiftRight(n, 1 + i)) % 10] + fraction[i]).replace(/零./, '')
  }
  s = s || '整'
  n = Math.floor(n)
  for (let i = 0; i < unit[0].length && n > 0; i++) {
    let p = ''
    for (let j = 0; j < unit[1].length && n > 0; j++) {
      p = digit[n % 10] + unit[1][j] + p
      n = Math.floor(shiftLeft(n, 1))
    }
    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')
  )
}

移位的優(yōu)化，防止出現(xiàn)精度不準(zhǔn)的問(wèn)題

// 向右移位
function shiftRight(number, digit) {
  digit = parseInt(digit, 10)
  let value = number.toString().split('e')
  return +(value[0] + 'e' + (value[1] ? +value[1] + digit : digit))
}

// 向左移位
function shiftLeft(number, digit) {
  digit = parseInt(digit, 10)
  let value = number.toString().split('e')
  return +(value[0] + 'e' + (value[1] ? +value[1] - digit : -digit))
}

輸出結(jié)果

//柒仟陸佰捌拾貳元壹分
console.log(digitUppercase(7682.01))
 //柒仟陸佰捌拾貳元整
console.log(digitUppercase(7682))
 //玖仟伍佰壹拾肆億叁仟肆佰陸拾柒萬(wàn)柒仟陸佰捌拾貳元整
console.log(digitUppercase(951434677682.00))