java金额大写转数字

以下是Java实现大写金额转数字的示例代码：

public class AmountUtil {

    private static final String[] CN_UPPER_NUMBER = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
    private static final String[] CN_UPPER_MONETRAY_UNIT = {"分", "角", "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟"};
    private static final BigDecimal MAX_VALUE = new BigDecimal("9999999999999.99");

    /**
     * 将大写金额转换为数字形式
     *
     * @param amount 大写金额
     * @return 数字形式
     */
    public static BigDecimal convertToNumber(String amount) {
        if (!amount.matches("^[壹贰叁肆伍陆柒捌玖拾佰仟万亿元角分]*$")) {
            throw new IllegalArgumentException("不是有效的大写金额格式");
        }
        StringBuilder sb = new StringBuilder(amount);
        // 处理万、亿
        int index = sb.indexOf("亿");
        if (index > -1) {
            String temp = sb.substring(0, index);
            BigDecimal num = new BigDecimal(convertToNumber(temp).toString());
            sb.delete(0, index + 1);
            sb.insert(0, " ");
            BigDecimal value = new BigDecimal(convertToNumber(sb.toString().trim()).toString());
            return num.multiply(new BigDecimal("100000000")).add(value);
        }
        index = sb.indexOf("万");
        if (index > -1) {
            String temp = sb.substring(0, index);
            BigDecimal num = new BigDecimal(convertToNumber(temp).toString());
            sb.delete(0, index + 1);
            sb.insert(0, " ");
            BigDecimal value = new BigDecimal(convertToNumber(sb.toString().trim()).toString());
            return num.multiply(new BigDecimal("10000")).add(value);
        }
        // 处理元、角、分
        BigDecimal result = new BigDecimal("0");
        int numIndex = 0;
        int unitIndex = 0;
        boolean getZero = false;
        while (numIndex < amount.length()) {
            char c = amount.charAt(numIndex);
            if (c >= '壹' && c <= '玖') {
                int num = c - '壹' + 1;
                if (unitIndex == 2) {
                    result = result.add(new BigDecimal(num));
                } else if (unitIndex == 6) {
                    result = result.add(new BigDecimal(num).multiply(new BigDecimal("10000")));
                } else if (unitIndex == 10) {
                    result = result.add(new BigDecimal(num).multiply(new BigDecimal("100000000")));
                } else {
                    result = result.add(new BigDecimal(num).multiply(new BigDecimal(Math.pow(10, 3 - unitIndex))));
                }
                getZero = false;
            } else if (c == '零') {
                getZero = true;
            } else if (CN_UPPER_MONETRAY_UNIT[unitIndex].equals(String.valueOf(c))) {
                getZero = false;
            } else if (c == '元') {
                getZero = false;
            } else if (c == '角') {
                if (getZero) {
                    result = result.add(new BigDecimal("0.1"));
                }
                getZero = false;
            } else if (c == '分') {
                if (getZero) {
                    result = result.add(new BigDecimal("0.01"));
                }
                getZero = false;
            }
            if (CN_UPPER_MONETRAY_UNIT[unitIndex].equals(String.valueOf(c))) {
                ++unitIndex;
            }
            ++numIndex;
        }
        return result;
    }

    public static void main(String[] args) {
        String amount = "壹亿贰仟叁佰肆拾伍万陆仟柒佰捌拾玖元零壹分";
        System.out.println(convertToNumber(amount)); // 123456789.01
    }
}

以上代码可以将大写金额转换为数字形式，支持亿、万、元、角、分等单位。注意，该方法只支持中文大写金额格式，不支持阿拉伯数字和英文格式。