js中数字转换为汉字

indexMethod(num) {
 // return "案列"+this.TransformToChinese(num+ 1+(this.queryParams.pageNum-1)*this.queryParams.pageSize);
 return "案列"+this.TransformToChinese(num);
},
TransformToChinese(num) {
  let changeNum = [
    "零",
    "一",
    "二",
    "三",
    "四",
    "五",
    "六",
    "七",
    "八",
    "九"
  ];
  let unit = ["", "十", "百", "千", "万"];
  num = parseInt(num);
  let getWan = temp => {
    let strArr = temp
      .toString()
      .split("")
      .reverse();
    let newNum = "";
    for (var i = 0; i < strArr.length; i++) {
      newNum =
        (i == 0 && strArr[i] == 0
          ? ""
          : i > 0 && strArr[i] == 0 && strArr[i - 1] == 0
          ? ""
          : changeNum[strArr[i]] + (strArr[i] == 0 ? unit[0] : unit[i])) +
        newNum;
    }
    return newNum;
  };
  let overWan = Math.floor(num / 10000);
  let noWan = num % 10000;
  if (noWan.toString().length < 4) {
    noWan = "0" + noWan;
  }
  return overWan ? getWan(overWan) + "万" + getWan(noWan) : getWan(num);
}