public static String digitUppercase(BigDecimal money) {
    /**
     * 漢語中數字大寫
     */
    String[] CN_UPPER_NUMBER = [ "零", "壹", "貳", "叄", "肆","伍", "陸", "柒", "捌", "玖" ];
    /**
     * 漢語中貨幣單位大寫，這樣的設計類似於佔位符
     */
    String[] CN_UPPER_MONETRAY_UNIT = [ "分", "角", "元","拾", "佰", "仟", "萬", "拾", "佰", "仟", "億", "拾", "佰", "仟", "兆", "拾","佰", "仟" ];
    /**
     * 特殊字元：整
     */
    String CN_FULL = "整";
    /**
     * 特殊字元：負
     */
    String CN_NEGATIVE = "負";
    /**
     * 金額的精度，預設值為2
     */
    int MONEY_PRECISION = 2;
    /**
     * 特殊字元：零元整
     */
    String CN_ZEOR_FULL = "零元" + CN_FULL;


    StringBuffer sb = new StringBuffer();
    // -1, 0, or 1 as the value of this BigDecimal is negative, zero, or
    // positive.
    int signum = money.signum();
    // 零元整的情況
    if (signum == 0) {
        return CN_ZEOR_FULL;
    }
    //這裡會進行金額的四捨五入
    long number = money.movePointRight(MONEY_PRECISION).setScale(0, 4).abs().longValue();
    // 得到小數點後兩位值
    long scale = number % 100;
    int numUnit = 0;
    int numIndex = 0;
    boolean getZero = false;
    // 判斷最後兩位數，一共有四中情況：00 = 0, 01 = 1, 10, 11
    if (!(scale > 0)) {
        numIndex = 2;
        number = number / 100;
        getZero = true;
    }
    if ((scale > 0) && (!(scale % 10 > 0))) {
        numIndex = 1;
        number = number / 10;
        getZero = true;
    }
    int zeroSize = 0;
    while (true) {
        if (number <= 0) {
            break;
        }
        // 每次獲取到最後一個數
        numUnit = (int) (number % 10);
        if (numUnit > 0) {
            if ((numIndex == 9) && (zeroSize >= 3)) {
                sb.insert(0, CN_UPPER_MONETRAY_UNIT[6]);
            }
            if ((numIndex == 13) && (zeroSize >= 3)) {
                sb.insert(0, CN_UPPER_MONETRAY_UNIT[10]);
            }
            sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
            sb.insert(0, CN_UPPER_NUMBER[numUnit]);
            getZero = false;
            zeroSize = 0;
        } else {
            ++zeroSize;
            if (!(getZero)) {
                sb.insert(0, CN_UPPER_NUMBER[numUnit]);
            }
            if (numIndex == 2) {
                if (number > 0) {
                    sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
                }
            } else if (((numIndex - 2) % 4 == 0) && (number % 1000 > 0)) {
                sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
            }
            getZero = true;
        }
        // 讓number每次都去掉最後一個數
        number = number / 10;
        ++numIndex;
    }
    // 如果signum == -1，則說明輸入的數字為負數，就在最前面追加特殊字元：負
    if (signum == -1) {
        sb.insert(0, CN_NEGATIVE);
    }
    // 輸入的數字小數點後兩位為"00"的情況，則要在最後追加特殊字元：整
    if (!(scale > 0)) {
        sb.append(CN_FULL);
    }
    return sb.toString();

}