更改

src/money/numberToWords.ts

-const digits = [
-  '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖', '零'
-];
-const units = [
-  '拾', '佰', '仟', '万', '亿', '兆',
-];
-const units2 = [
-  '角', '分', '厘', '毫', '丝'
-];
-
-export default function numberToWords(input: string|number): string {
-  input=String(input)
-  let newInput
-  if (input === undefined || input === null || input === '' || !/^[\-]?\d{0,21}(\.\d{0,3})?$/.test(input)) {
-      return input;
+const digits = ['壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖', '零']
+const units = ['拾', '佰', '仟', '万', '亿', '兆']
+const units2 = ['角', '分', '厘', '毫', '丝']
+const maxlength = 16
+function isDefined(value) {
+  return typeof value !== 'undefined'
+}
+function isEmpty(val) {
+  // null or undefined
+  if (val == null) return true
+
+  if (typeof val === 'boolean') return false
+
+  if (val === 0) return false
+
+  if (typeof val === 'number') return !val
+
+  if (val instanceof Error) return val.message === ''
+
+  switch (Object.prototype.toString.call(val)) {
+    // String or Array
+    case '[object String]':
+    case '[object Array]':
+      return !val.length
+
+    // Map or Set or File
+    case '[object File]':
+    case '[object Map]':
+    case '[object Set]': {
+      return !val.size
+    }
+    // Plain Object
+    case '[object Object]': {
+      return !Object.keys(val).length
+    }
   }
-  if(/[\-]\d{0,21}(\.\d{0,3})?$/.test(input)){
-      newInput = input.replace(/-/,"");
-  }else{
-      newInput = input;
+
+  return false
+}
+function toStdAmount(sAmount) {
+  if (!isDefined(sAmount) || isEmpty(sAmount)) return
+  // if (sAmount.indexOf('-') >= 0) {
+  // 替换掉负号
+  var rFlag = sAmount.indexOf('-') >= 0
+  sAmount = sAmount.replace(/-/g, '')
+  // }
+  var sComma = /\,/gi
+  var sResult = sAmount.replace(sComma, '')
+  var iDotIndex = sResult.indexOf('.')
+  var iLength = sResult.length
+  var toMatchNaNum = /\D/
+  var flag = true
+  if (
+    (iDotIndex != -1 &&
+      (iLength - iDotIndex > 3 || toMatchNaNum.test(sResult.slice(0, iDotIndex)))) ||
+    toMatchNaNum.test(sResult.slice(iDotIndex + 1, iLength))
+  ) {
+    flag = false
+    return sResult.substr(0, iDotIndex + 3)
+    // 小数点后大于2位数 或 含有非数字字符
+  } else {
+    // 将金额处理为######.##形式
+    if (iDotIndex == -1) {
+      sResult = sResult + '.00'
+    } else if (iDotIndex == 0) {
+      if (iLength - iDotIndex == 1) sResult = '0' + sResult + '00'
+      if (iLength - iDotIndex == 2) sResult = '0' + sResult + '0'
+      if (iLength - iDotIndex == 3) sResult = '0' + sResult
+    } else {
+      if (iLength - iDotIndex == 2) sResult = sResult + '0'
+      if (iLength - iDotIndex == 1) sResult = sResult + '00'
+    }
+
+    // 处理金额非前面的0
+    var sTemp = ''
+    sTemp = sResult.slice(0, iDotIndex)
+    var iTemp = new Number(sTemp)
+    sTemp = iTemp.toString()
+    if (sTemp.length > maxlength) {
+      flag = false
+      return null
+      // 太长的金额
+    }
+    iDotIndex = sResult.indexOf('.')
+    sResult = sTemp + sResult.slice(iDotIndex)
+    // 返回######.##形式的金额
+    return rFlag ? '-' + sResult : sResult
   }
-  newInput = newInput.replace(/^0+$/, "0").replace(/^0+([1-9].*)/, "$1");
-  const CN1 = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'];
-  const CN2 = ['元', '万', '亿','兆','京','垓'];
-  const CN3 = ['', '拾', '佰', '仟'];
-  const CN4 = ['角', '分', '厘'];
-  newInput = newInput + "";
-  const arr = newInput.split(".");
-  let int = arr[0], dot = arr[1];//分成整数和小数两个部分
-  let intArr = int.split("");
-  let counter = 0;
-  for (let i = intArr.length - 1; i >= 0; i--) {
-      intArr[i] = CN1[intArr[i]] + CN3[counter % 4];
-      if (counter % 4 == 0) {
-          intArr[i] += CN2[counter / 4];
+}
+export default function numberToWords(sAmount: string | number): string | boolean {
+  sAmount = sAmount + ''
+  var rFlag = sAmount.indexOf('-') >= 0
+  sAmount = sAmount.replace(/-/g, '').replace(/[^\d\.\-]+/g, '')
+  var value = toStdAmount(sAmount)
+  if (value.indexOf('.') != value.lastIndexOf('.')) return '金额输入有误'
+  var sCN_Num = new Array('零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖')
+  var unit = new Array('元', '万', '亿', '万')
+  var subunit = new Array('拾', '佰', '仟')
+  var sCNzero = '零'
+  var result = ''
+  var iDotIndex = value.indexOf('.')
+  var sBeforeDot = value.slice(0, iDotIndex)
+  var sAfterDot = value.slice(iDotIndex)
+  var len = 0
+  len = sBeforeDot.length
+  var i = 0,
+    j = 0,
+    k = 0
+  // j is use to subunit,k is use to unit
+  var oldC = '3'
+  var cc = '0'
+  result = unit[0] + result
+  var oldHasN = false
+  var hasN = false
+  var allZero = true
+  for (var i = 0; i < len; i++) {
+    if (j == 0 && i != 0) {
+      if (!hasN) {
+        if (k % 2 == 0) result = result.slice(1)
+      } else {
+        if (oldC == '0') result = sCNzero + result
       }
-      counter++;
-  }
-  int = intArr.join("").replace(/(零仟|零佰|零拾)/g, "零").replace(/零+/g, "零").replace(/零(元|万|亿|兆|京|垓)/g, "$1").replace(/亿万/, "亿").replace(/兆亿/,"兆").replace(/京兆/,"京").replace(/垓京/,"垓");
-  if (int === '元') {
-      int = '零元';
+      if (oldC == '0' && result[0] !== '零' && result[0] !== '元') {
+        result = '零' + result
+      }
+      result = unit[k] + result
+      oldHasN = hasN
+      hasN = false
+    }
+    cc = sBeforeDot.charAt(len - i - 1)
+    if (oldC == '0' && cc != oldC) {
+      if (hasN) result = sCNzero + result
+    }
+    if (cc != '0') {
+      if (j != 0) {
+        result = subunit[j - 1] + result
+      }
+      var dig = '0'
+      dig = sCN_Num[cc]
+
+      if (dig == '0') {
+        return false
+      }
+      hasN = true
+      allZero = false
+      result = dig + result
+    }
+    oldC = cc
+    j++
+    if (j == 4) {
+      k++
+      j = 0
+    }
   }
-  if (!dot || /^0+$/.test(dot)) {
-      if(/^[\-]\d{0,21}(\.\d{0,3})?$/.test(input)){
-          let value = input.length==1?"负":"负"+int+"整"
-          return value;
-      }else{
-          return int + "整";
+  if (allZero) {
+    result = '零元'
+  } else {
+    var bb = 0
+    if (!hasN) {
+      bb++
+      if (!oldHasN) {
+        bb++
       }
+    }
+    if (bb != 0) {
+      result = result.slice(bb)
+    }
+    if (result.charAt(0) == '零') {
+      result = result.slice(1)
+    }
+  }
+
+  // after dot
+  sAfterDot = sAfterDot.slice(1)
+  len = sAfterDot.length
+  var corn = new Array('0', '0')
+  var cornunit = new Array('角', '分')
+  var n = 0
+  // j is use to subunit,k is use to unit
+  var dig = '0'
+  corn[0] = sAfterDot.charAt(0)
+  if (len > 1) {
+    corn[1] = sAfterDot.charAt(1)
+  } else {
+    corn[1] = '0'
+  }
+  if (corn[0] == '0' && corn[1] == '0') {
+    return rFlag ? (result = '-' + result + '整') : (result += '整')
   } else {
-      dot = dot.split("").map(function (item, index) {
-          return CN1[item] + CN4[index];
-      }).join("");
-      dot = dot.replace(/(零角|零分|零厘)/g, "零").replace(/零+/g, "零").replace(/零$/, "");
-      if(/^[\-]\d{0,21}(\.\d{0,3})?$/.test(input)){
-          return "负" + int + dot;
-      }else{
-          return int + dot;
+    if (allZero) result = ''
+  }
+  for (var i = 0; i < 2; i++) {
+    var curchar = corn[i]
+    dig = sCN_Num[curchar]
+    if (i == 0) {
+      if (result != '' || curchar != '0') {
+        result += dig
+      }
+      if (curchar != '0') {
+        result += cornunit[0]
       }
+    }
+    if (i == 1 && curchar != '0') {
+      result = result + dig + cornunit[1]
+    }
   }
-}
\ No newline at end of file
+  return rFlag ? '负  ' + result : result
+}

test/money/numberToWords.test.ts

@@ -2,6 +2,13 @@ import { describe, it, expect } from 'vitest'
 import numberToWords from '../../src/money/numberToWords'
 
 describe('测试整数', () => {
+  it('17916.67 toBe 壹万柒仟玖佰壹拾陆元陆角柒分', () => {
+    expect(numberToWords(17916.67)).toBe('壹万柒仟玖佰壹拾陆元陆角柒分')
+  })
+  it('12500.06 toBe 壹万贰仟伍佰元零陆分', () => {
+    expect(numberToWords(12500.06)).toBe('壹万贰仟伍佰元零陆分')
+  })
+
   it('1 toBe 壹元整', () => {
     expect(numberToWords(1)).toBe('壹元整')
   })