寫匯出報表時拼接實體類getter方法，需要將字串首字母改大寫。

    public static String upCase(String str) {
        char chr = str.charAt(0);
        if (chr >= 'a' && chr <= 'z') {
            chr = (char) (chr - 32);
            StringBuilder stringBuilder = new StringBuilder(str);
            stringBuilder.setCharAt(0, chr);
            str = stringBuilder.toString();
        }
        return str;
    }