js工具函數之數字轉爲中文數字和大寫金額

 1. 數字轉爲中文數字

function numberToChinese(num) {
  var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十");
  var BB = new Array("", "十", "百", "仟", "萬", "億", "點", "");
  var a = ("" + num).replace(/(^0*)/g, "").split("."),
    k = 0,
    re = "";
  for (var i = a[0].length - 1; i >= 0; i--) {
    switch (k) {
      case 0:
        re = BB[7] + re;
        break;
      case 4:
        if (!new RegExp("0{4}//d{" + (a[0].length - i - 1) + "}$")
          .test(a[0]))
          re = BB[4] + re;
        break;
      case 8:
        re = BB[5] + re;
        BB[7] = BB[5];
        k = 0;
        break;
    }
    if (k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0)
      re = AA[0] + re;
    if (a[0].charAt(i) != 0)
      re = AA[a[0].charAt(i)] + BB[k % 4] + re;
    k++;
  }
  if (a.length > 1) // 加上小數部分(如果有小數部分)
  {
    re += BB[6];
    for (var i = 0; i < a[1].length; i++)
      re += AA[a[1].charAt(i)];
  }
  if (re == '一十')
    re = "十";
  if (re.match(/^一/) && re.length == 3)
    re = re.replace("一", "");
  return re;
}
let numTem = 1545644;
console.log(numberToChinese(numTem));  // 一百五十四萬五仟六百四十四

 2. 數字轉爲中文大寫金額

function changeToChineseMoney(Num) {
  //判斷如果傳遞進來的不是字符的話轉換爲字符
  if (typeof Num == "number") {
    Num = new String(Num);
  };
  Num = Num.replace(/,/g, "") //替換tomoney()中的“,”
  Num = Num.replace(/ /g, "") //替換tomoney()中的空格
  Num = Num.replace(/￥/g, "") //替換掉可能出現的￥字符
  if (isNaN(Num)) { //驗證輸入的字符是否爲數字
    //alert("請檢查小寫金額是否正確");
    return "";
  };
  //字符處理完畢後開始轉換，採用前後兩部分分別轉換
  var part = String(Num).split(".");
  var newchar = "";
  //小數點前進行轉化
  for (var i = part[0].length - 1; i >= 0; i--) {
    if (part[0].length > 10) {
      return "";
      //若數量超過拾億單位，提示
    }
    var tmpnewchar = ""
    var perchar = part[0].charAt(i);
    switch (perchar) {
      case "0":
        tmpnewchar = "零" + tmpnewchar;
        break;
      case "1":
        tmpnewchar = "壹" + tmpnewchar;
        break;
      case "2":
        tmpnewchar = "貳" + tmpnewchar;
        break;
      case "3":
        tmpnewchar = "叄" + tmpnewchar;
        break;
      case "4":
        tmpnewchar = "肆" + tmpnewchar;
        break;
      case "5":
        tmpnewchar = "伍" + tmpnewchar;
        break;
      case "6":
        tmpnewchar = "陸" + tmpnewchar;
        break;
      case "7":
        tmpnewchar = "柒" + tmpnewchar;
        break;
      case "8":
        tmpnewchar = "捌" + tmpnewchar;
        break;
      case "9":
        tmpnewchar = "玖" + tmpnewchar;
        break;
    }
    switch (part[0].length - i - 1) {
      case 0:
        tmpnewchar = tmpnewchar + "元";
        break;
      case 1:
        if (perchar != 0) tmpnewchar = tmpnewchar + "拾";
        break;
      case 2:
        if (perchar != 0) tmpnewchar = tmpnewchar + "佰";
        break;
      case 3:
        if (perchar != 0) tmpnewchar = tmpnewchar + "仟";
        break;
      case 4:
        tmpnewchar = tmpnewchar + "萬";
        break;
      case 5:
        if (perchar != 0) tmpnewchar = tmpnewchar + "拾";
        break;
      case 6:
        if (perchar != 0) tmpnewchar = tmpnewchar + "佰";
        break;
      case 7:
        if (perchar != 0) tmpnewchar = tmpnewchar + "仟";
        break;
      case 8:
        tmpnewchar = tmpnewchar + "億";
        break;
      case 9:
        tmpnewchar = tmpnewchar + "拾";
        break;
    }
    var newchar = tmpnewchar + newchar;
  }
  //小數點之後進行轉化
  if (Num.indexOf(".") != -1) {
    if (part[1].length > 2) {
      // alert("小數點之後只能保留兩位,系統將自動截斷");
      part[1] = part[1].substr(0, 2)
    }
    for (i = 0; i < part[1].length; i++) {
      tmpnewchar = ""
      perchar = part[1].charAt(i)
      switch (perchar) {
        case "0":
          tmpnewchar = "零" + tmpnewchar;
          break;
        case "1":
          tmpnewchar = "壹" + tmpnewchar;
          break;
        case "2":
          tmpnewchar = "貳" + tmpnewchar;
          break;
        case "3":
          tmpnewchar = "叄" + tmpnewchar;
          break;
        case "4":
          tmpnewchar = "肆" + tmpnewchar;
          break;
        case "5":
          tmpnewchar = "伍" + tmpnewchar;
          break;
        case "6":
          tmpnewchar = "陸" + tmpnewchar;
          break;
        case "7":
          tmpnewchar = "柒" + tmpnewchar;
          break;
        case "8":
          tmpnewchar = "捌" + tmpnewchar;
          break;
        case "9":
          tmpnewchar = "玖" + tmpnewchar;
          break;
      }
      if (i == 0) tmpnewchar = tmpnewchar + "角";
      if (i == 1) tmpnewchar = tmpnewchar + "分";
      newchar = newchar + tmpnewchar;
    }
  }
  //替換所有無用漢字
  while (newchar.search("零零") != -1)
    newchar = newchar.replace("零零", "零");
  newchar = newchar.replace("零億", "億");
  newchar = newchar.replace("億萬", "億");
  newchar = newchar.replace("零萬", "萬");
  newchar = newchar.replace("零元", "元");
  newchar = newchar.replace("零角", "");
  newchar = newchar.replace("零分", "");
  if (newchar.charAt(newchar.length - 1) == "元") {
    newchar = newchar + "整"
  }
  return newchar;
}
let money = 15455605;
console.log(changeToChineseMoney(money));  // 壹仟伍佰肆拾伍萬伍仟陸佰零伍元整