|
在开发中我们经常会遇到处理数字的问题,下面介绍一种处理数字金额转换为中文金额的方式:
我们通常使用三种书面数字系统:全球使用的阿拉伯数字系统和两种本地数字系统(繁体、简体)。常规时我们使用阿拉伯数字(1,2,3等),但在某些情况中,如金融中我们会使用繁体汉字来书写数字,繁体字优点是安全且无法篡改,弥补了阿拉数字易于修改的问题,如在银行帐户存储或支票上使用繁体大写数字。
书写中文数字时只须输入阿拉伯数字。点击转换即可以实现阿拉伯数字转中文大写,支持元、角、分。
中文大写书写时的注意事项:
中文大写金额数字应用正楷或行书填写,使用繁体字。如壹、贰、叁、肆、伍、陆、柒、捌、玖、拾、佰、仟、万、亿、元、角、分、零、整(正)等字样。
一、中文大写金额数字到"元"为止的,在"元"之后,应写"整"(或"正")字,在"角"之后,可以不写"整"(或"正")字。
二、中文大写金额数字前应标明"人民币"字样,大写金额数字有"分"的,"分"后面不写"整"(或"正")字。
三、大写金额数字应紧接"人民币"字样填写,不得留有空白。大写金额数字前未印"人民币"字样的,应加填"人民币"三字。在票据和结算凭证大写金额栏内不得预印固定的"仟、佰、拾、万、仟、佰、拾、元、角、分"字样。
四、阿拉伯数字小写金额数字中有"0"时,中文大写应按照汉语语言规律、金额数字构成和防止涂改的要求进行书写。
以下是具体代码实现:- /**
- * convertCurrencyToChinese - 数字转成汉字
- * @params num === 要转换的数字
- * @return 汉字
- * <br>*/<br>function convertCurrencyToChinese(num) {
- if(!num){
- return '零';
- }
- // Constants:
- const MAXIMUM_NUMBER = 99999999999.99;
- // Predefine the radix characters and currency symbols for output:
- const CN_ZERO = "零";
- const CN_ONE = "壹";
- const CN_TWO = "贰";
- const CN_THREE = "叁";
- const CN_FOUR = "肆";
- const CN_FIVE = "伍";
- const CN_SIX = "陆";
- const CN_SEVEN = "柒";
- const CN_EIGHT = "捌";
- const CN_NINE = "玖";
- const CN_TEN = "拾";
- const CN_HUNDRED = "佰";
- const CN_THOUSAND = "仟";
- const CN_TEN_THOUSAND = "万";
- const CN_HUNDRED_MILLION = "亿";
- // const CN_SYMBOL = "人民币";
- const CN_DOLLAR = "元";
- const CN_TEN_CENT = "角";
- const CN_CENT = "分";
- const CN_INTEGER = "整";
- // Variables:
- // let integral; // Represent integral part of digit number.
- // let decimal; // Represent decimal part of digit number.
- let outputCharacters; // The output result.
- // let parts;
- // let digits;
- // let radices;
- // let bigRadices;
- // let decimals;
- let zeroCount;
- let i;
- let p;
- let d;
- let quotient;
- let modulus;
- let currencyDigits = num;
- // Validate input string:
- currencyDigits = currencyDigits.toString();
- if (currencyDigits === "") {
- // alert("Empty input!");
- return "";
- }
- if (currencyDigits.match(/[^,.\d]/) != null) {
- // alert("Invalid characters in the input string!");
- return "";
- }
- if ((currencyDigits).match(/^((\d{1,3}(,\d{3})*(.((\d{3},)*\d{1,3}))?)|(\d+(.\d+)?))$/) == null) {
- // alert("Illegal format of digit number!");
- 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) {
- // eslint-disable-next-line no-console
- console.warn("输入的金额太大,请重新输入!");
- return "";
- }
- // Process the coversion from currency digits to characters:
- // Separate integral and decimal parts before processing coversion:
- const parts = currencyDigits.split(".");
- // eslint-disable-next-line prefer-const
- let [integral, decimal = ''] = parts;
- if (parts.length > 1) {
- // Cut down redundant decimal digits that are after the second.
- decimal = decimal.substr(0, 2);
- }
- // Prepare the characters corresponding to the digits:
- const digits = [CN_ZERO, CN_ONE, CN_TWO, CN_THREE, CN_FOUR, CN_FIVE, CN_SIX, CN_SEVEN, CN_EIGHT, CN_NINE];
- const radices = ["", CN_TEN, CN_HUNDRED, CN_THOUSAND];
- const bigRadices = ["", CN_TEN_THOUSAND, CN_HUNDRED_MILLION];
- const decimals = [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];
- }
- }
- 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;
- }
- return outputCharacters || '';
- }
复制代码 以上就是实现过程。
来源:https://www.cnblogs.com/abc-x/p/17582785.html
免责声明:由于采集信息均来自互联网,如果侵犯了您的权益,请联系我们【E-Mail:cb@itdo.tech】 我们会及时删除侵权内容,谢谢合作! |
|