详解javascript常用工具类的封装(4)

/*随机数范围*/
random (min, max) {
  if (arguments.length === 2) {
    return Math.floor(min + Math.random() * ( (max+1) - min ))
  }else{
    return null;
  }
  
}

/*将阿拉伯数字翻译成中文的大写数字*/
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", "点", "");
  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) // 加上小数部分(如果有小数部分)
  {
    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;
}

/*将数字转换为大写金额*/
changeToChinese (Num) {
    //判断如果传递进来的不是字符的话转换为字符
    if(typeof Num == "number") {
      Num = new String(Num);
    };
    Num = Num.replace(/,/g, "") //替换tomoney()中的“,”
    Num = Num.replace(/ /g, "") //替换tomoney()中的空格
    Num = Num.replace(/￥/g, "") //替换掉可能出现的￥字符
    if(isNaN(Num)) { //验证输入的字符是否为数字
      //alert("请检查小写金额是否正确");
      return "";
    };
    //字符处理完毕后开始转换，采用前后两部分分别转换
    var part = String(Num).split(".");
    var newchar = "";
    //小数点前进行转化
    for(var i = part[0].length - 1; i >= 0; i--) {
      if(part[0].length > 10) {
        return "";
        //若数量超过拾亿单位，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 = "贰" + tmpnewchar;
          break;
        case "3":
          tmpnewchar = "叁" + tmpnewchar;
          break;
        case "4":
          tmpnewchar = "肆" + tmpnewchar;
          break;
        case "5":
          tmpnewchar = "伍" + tmpnewchar;
          break;
        case "6":
          tmpnewchar = "陆" + 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 + "万";
          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 + "亿";
          break;
        case 9:
          tmpnewchar = tmpnewchar + "拾";
          break;
      }
      var newchar = tmpnewchar + newchar;
    }
    //小数点之后进行转化
    if(Num.indexOf(".") != -1) {
      if(part[1].length > 2) {
        // alert("小数点之后只能保留两位,系统将自动截断");
        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 = "贰" + tmpnewchar;
            break;
          case "3":
            tmpnewchar = "叁" + tmpnewchar;
            break;
          case "4":
            tmpnewchar = "肆" + tmpnewchar;
            break;
          case "5":
            tmpnewchar = "伍" + tmpnewchar;
            break;
          case "6":
            tmpnewchar = "陆" + 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;
      }
    }
    //替换所有无用汉字
    while(newchar.search("零零") != -1)
      newchar = newchar.replace("零零", "零");
    newchar = newchar.replace("零亿", "亿");
    newchar = newchar.replace("亿万", "亿");
    newchar = newchar.replace("零万", "万");
    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;
  }