人民币(RMB)小写/数字转换大写工具类，精确到分，修复‘圆零零’为‘圆整’，修复科学计数法处理异常。

川长思鸟来 2023-06-30 05:28 24阅读 0赞

/**
         * 转换为中国人民币大写字符串,精确到分
         * @param money 传入小写数字字符串
         * @return String
         * @throws Exception
         */
        public static String toRMBUpper(String money) throws Exception {
            boolean lessZero = false;
            //When money is scientific notation
            if (money.contains("E")){
                BigDecimal bg = new BigDecimal(Double.valueOf(money));
                money = bg.toPlainString();
            }
            if(money.startsWith("-")) {
                money = money.substring(1);
                lessZero = true;
            }
     
            if (!money.matches("^[0-9]*$|^0+\\.[0-9]+$|^[1-9]+[0-9]*$|^[1-9]+[0-9]*.[0-9]+$")) {
                throw new Exception("钱数格式错误！");
            }
            String[] part = money.split("\\.");
            String integerData = part[0];
            String decimalData = part.length > 1 ? part[1] : "";
            //Replace front 0
            if(integerData.matches("^0+$"))
            {
                integerData = "0";
            }else if(integerData.matches("^0+(\\d+)$")){
                integerData = integerData.replaceAll("^0+(\\d+)$", "$1");
            }
     
            StringBuffer integer = new StringBuffer();
            for (int i = 0; i < integerData.length(); i++) {
                char perchar = integerData.charAt(i);
                integer.append(upperNumber(perchar));
                integer.append(upperNumber(integerData.length() - i - 1));
            }
            StringBuffer decimal = new StringBuffer();
            if (part.length > 1 && !"00".equals(decimalData)) {
                int length = decimalData.length() >= 2 ? 2 : decimalData.length();
                for (int i = 0; i < length; i++) {
                    char perchar = decimalData.charAt(i);
                    decimal.append(upperNumber(perchar));
                    if (i == 0)
                        decimal.append('角');
                    if (i == 1)
                        decimal.append('分');
                }
            }
            String result = integer.toString() + decimal.toString();
            result = dispose(result);
            if(lessZero && !"零圆整".equals(result)) {
                result = "负" + result;
            }
            return result;
        }
     
        private static char upperNumber(char number) {
            switch (number) {
                case '0':
                    return '零';
                case '1':
                    return '壹';
                case '2':
                    return '贰';
                case '3':
                    return '叁';
                case '4':
                    return '肆';
                case '5':
                    return '伍';
                case '6':
                    return '陆';
                case '7':
                    return '柒';
                case '8':
                    return '捌';
                case '9':
                    return '玖';
            }
            return '0';
        }
     
        private static char upperNumber(int index) {
            int realIndex =  index  % 9;
            if(index > 8) {
                realIndex =  (index - 9) % 8;
                realIndex = realIndex + 1;
            }
            switch (realIndex) {
                case 0:
                    return '圆';
                case 1:
                    return '拾';
                case 2:
                    return '佰';
                case 3:
                    return '仟';
                case 4:
                    return '万';
                case 5:
                    return '拾';
                case 6:
                    return '佰';
                case 7:
                    return '仟';
                case 8:
                    return '亿';
            }
            return '0';
        }
     
        private static String dispose(String result) {
            result = result.replaceAll("0", "");
            result = result.replaceAll("零仟零佰零拾|零仟零佰|零佰零拾|零仟|零佰|零拾", "零");
            result = result.replaceAll("零+", "零").replace("零亿", "亿");
            result = result.matches("^.*亿零万[^零]仟.*$") ? result.replace("零万", "零") : result.replace("零万", "万");
            result = result.replace("亿万", "亿");
            //Processing decimals
            result = result.replace("零角", "零").replace("零分", "");
            result = result.replaceAll("(^[零圆]*)(.+$)", "$2");
            result = result.replaceAll("(^.*)([零]+圆)(.+$)", "$1圆零$3");
     
            //Processing integer
            result = result.replaceAll("圆零角零分|圆零角$|圆$|^零$|圆零$|圆零零$|零圆$", "圆整");
            result = result.replaceAll("^圆整$", "零圆整");
     
     
            return result;
        }
     
     
        public static void main(String[] args) throws Exception {
            //Test
            System.out.println(toRMBUpper("9999999999.0"));
            //Out: 玖拾玖亿玖仟玖佰玖拾玖万玖仟玖佰玖拾玖圆整
        }