王小胖之数字转大写

使用场景：一般在书写正规金额的时候都要求填写大写数字。

实现功能：数字转大写功能主要实现：输入小写阿拉伯数字，转换成大写

数据实例：输入，12345678.90   输出，人民币:壹仟贰佰叁拾肆万伍仟陆佰柒拾捌元玖角

功能实现：

Html代码

<div class="input-group">
    <input name="kw" type="text" class="form-control" placeholder="数字" id="lower" value="12345678.90">
    <div class="input-group-btn">
    <button type="submit" class="btn btn-success" id="convert">转换</button>
        </div>
</div>

JS代码

<script src="/wxp123/Public/js/number/numberconvert.js"></script>
            <script type="text/javascript">
                  $(function(){
                      $("#convert").click(function(){
                          lower= $("#lower").val();
                          upper=convertCurrency(lower);
                          $("#upper").val(upper);
                      });

                      $("#lower").change(function(){
                          lower= $("#lower").val();
                          upper=convertCurrency(lower);
                          $("#upper").val(upper);
                      });
                  });
               </script>

numberconvert.js

function convertCurrency(currencyDigits) {
// Constants:
    var MAXIMUM_NUMBER = 99999999999.99;
    // Predefine the radix characters and currency symbols for output:
    var CN_ZERO = "零";
    var CN_ONE = "壹";
    var CN_TWO = "贰";
    var CN_THREE = "叁";
    var CN_FOUR = "肆";
    var CN_FIVE = "伍";
    var CN_SIX = "陆";
    var CN_SEVEN = "柒";
    var CN_EIGHT = "捌";
    var CN_NINE = "玖";
    var CN_TEN = "拾";
    var CN_HUNDRED = "佰";
    var CN_THOUSAND = "仟";
    var CN_TEN_THOUSAND = "万";
    var CN_HUNDRED_MILLION = "亿";
    var CN_SYMBOL = "人民币:";
    var CN_DOLLAR = "元";
    var CN_TEN_CENT = "角";
    var CN_CENT = "分";
    var CN_INTEGER = "整"; 

// Variables:
    var integral;    // Represent integral part of digit number.
    var decimal;    // Represent decimal part of digit number.
    var outputCharacters;    // The output result.
    var parts;
    var digits, radices, bigRadices, decimals;
    var zeroCount;
    var i, p, d;
    var quotient, modulus; 

// Validate input string:
    currencyDigits = currencyDigits.toString();
    if (currencyDigits == "") {
        alert("请输入小写金额！");
        return "";
    }
    if (currencyDigits.match(/[^,.\d]/) != null) {
        alert("小写金额含有无效字符！");
        return "";
    }
    if ((currencyDigits).match(/^((\d{1,3}(,\d{3})*(.((\d{3},)*\d{1,3}))?)|(\d+(.\d+)?))$/) == null) {
        alert("小写金额的格式不正确！");
        return "";
    } 

// Normalize the format of input digits:
    currencyDigits = currencyDigits.replace(/,/g, "");    // Remove comma delimiters.
    currencyDigits = currencyDigits.replace(/^0+/, "");    // Trim zeros at the beginning.
    // Assert the number is not greater than the maximum number.
    if (Number(currencyDigits) > MAXIMUM_NUMBER) {
        alert("金额过大，应小于1000亿元！");
        return "";
    } 

// Process the coversion from currency digits to characters:
    // Separate integral and decimal parts before processing coversion:
    parts = currencyDigits.split(".");
    if (parts.length > 1) {
        integral = parts[0];
        decimal = parts[1];
        // Cut down redundant decimal digits that are after the second.
        decimal = decimal.substr(0, 2);
    }
    else {
        integral = parts[0];
        decimal = "";
    }
    // Prepare the characters corresponding to the digits:
    digits = new Array(CN_ZERO, CN_ONE, CN_TWO, CN_THREE, CN_FOUR, CN_FIVE, CN_SIX, CN_SEVEN, CN_EIGHT, CN_NINE);
    radices = new Array("", CN_TEN, CN_HUNDRED, CN_THOUSAND);
    bigRadices = new Array("", CN_TEN_THOUSAND, CN_HUNDRED_MILLION);
    decimals = new Array(CN_TEN_CENT, CN_CENT);
    // Start processing:
    outputCharacters = "";
    // Process integral part if it is larger than 0:
    if (Number(integral) > 0) {
        zeroCount = 0;
        for (i = 0; i < integral.length; i++) {
            p = integral.length - i - 1;
            d = integral.substr(i, 1);
            quotient = p / 4;
            modulus = p % 4;
            if (d == "0") {
                zeroCount++;
            }
            else {
                if (zeroCount > 0)
                {
                    outputCharacters += digits[0];
                }
                zeroCount = 0;
                outputCharacters += digits[Number(d)] + radices[modulus];
            }
            if (modulus == 0 && zeroCount < 4) {
                outputCharacters += bigRadices[quotient];
                zeroCount = 0;
            }
        }
        outputCharacters += CN_DOLLAR;
    }
    // Process decimal part if there is:
    if (decimal != "") {
        for (i = 0; i < decimal.length; i++) {
            d = decimal.substr(i, 1);
            if (d != "0") {
                outputCharacters += digits[Number(d)] + decimals[i];
            }
        }
    }
    // Confirm and return the final output string:
    if (outputCharacters == "") {
        outputCharacters = CN_ZERO + CN_DOLLAR;
    }
    if (decimal == "") {
        outputCharacters += CN_INTEGER;
    }
    outputCharacters = CN_SYMBOL + outputCharacters;
    return outputCharacters;
} 

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不爱说话，一切以代码为主，其他 全靠悟性！

数字转大写功能地址：http://www.wxp123.me/Index/detail/id/10.html

王小胖个人博客地址：http://blog.wxp123.me/