Как я могу сделать динамический заголовок столбца и динамические данные для экспорта в Excel, используя Spring Boot и Appache POI запрос в виде JPQL

Question

Я использую Spring Boot для экспорта файла в Excel с помощью Apache Poi, но я устанавливаю заголовки (имена столбцов из базы данных) как статические. Мне нужно установить это значение как исходящее из базы данных. Я использую JPQL Query для подключения списка результатов

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Сервисный код

@Override
    public File exportPOFile(POFilterVO poFilterVO) throws NoDatabaseConnectedException, IOException, ParseException {

    LOGGER.info("Method Name : exportPOFile", POServiceImpl.class);
    List<Object[]> poList = this.omPurchaseOrderRepository.getPOList(poFilterVO, "");
    File file = null;
    if (poList != null && !poList.isEmpty()) {
        HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFCellStyle rheaderStyle = workbook.createCellStyle();
        HSSFCellStyle lheaderStyle = workbook.createCellStyle();
        HSSFCellStyle cheaderStyle = workbook.createCellStyle();
        HSSFCellStyle alignLeft = workbook.createCellStyle();
        HSSFCellStyle alignRight = workbook.createCellStyle();
        HSSFCellStyle alignCenter = workbook.createCellStyle();

        CellStyle cellStyle = workbook.createCellStyle();
        CreationHelper createHelper = workbook.getCreationHelper();
        short dateFormat = createHelper.createDataFormat().getFormat("dd/MM/yyyy");
        cellStyle.setDataFormat(dateFormat);

        HSSFSheet sheet = workbook.createSheet();

        HSSFCellStyle my_style_0 = workbook.createCellStyle();
        my_style_0.setDataFormat(HSSFDataFormat.getBuiltinFormat("d-mmm-yy"));
        Calendar calendar = new GregorianCalendar();
        calendar.set(1982, Calendar.NOVEMBER, 25);

        sheet.createFreezePane(0, 1);
        HSSFFont headerFont = workbook.createFont();
        headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);

        rheaderStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        rheaderStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
        rheaderStyle.setFillBackgroundColor(HSSFColor.WHITE.index);
        rheaderStyle.setFont(headerFont);
        rheaderStyle.setAlignment(CellStyle.ALIGN_RIGHT);

        lheaderStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        lheaderStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
        lheaderStyle.setFillBackgroundColor(HSSFColor.WHITE.index);
        lheaderStyle.setFont(headerFont);
        lheaderStyle.setAlignment(CellStyle.ALIGN_LEFT);

        cheaderStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        cheaderStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
        cheaderStyle.setFillBackgroundColor(HSSFColor.WHITE.index);
        cheaderStyle.setFont(headerFont);
        cheaderStyle.setAlignment(CellStyle.ALIGN_CENTER);

        alignLeft.setAlignment(CellStyle.ALIGN_LEFT);
        alignRight.setAlignment(CellStyle.ALIGN_RIGHT);
        alignCenter.setAlignment(CellStyle.ALIGN_CENTER);

        HSSFRow row = sheet.createRow(0);

        HSSFCell cell0 = row.createCell(0);
        cell0.setCellStyle(rheaderStyle);
        cell0.setCellValue("PO No");

        HSSFCell cell1 = row.createCell(1);
        cell1.setCellStyle(rheaderStyle);
        cell1.setCellValue("PO Date");

        HSSFCell cell2 = row.createCell(2);
        cell2.setCellStyle(rheaderStyle);
        cell2.setCellValue("Contract No");

        HSSFCell cell3 = row.createCell(3);
        cell3.setCellStyle(rheaderStyle);
        cell3.setCellValue("Customer");

        HSSFCell cell4 = row.createCell(4);
        cell4.setCellStyle(rheaderStyle);
        cell4.setCellValue("Company");

        int j = 0;
        int rowNumber = 1;
        for (Object[] obj : poList) {
            OmPurchaseOrderVO omPurchaseOrderVO = new OmPurchaseOrderVO();
            BeanUtils.copyProperties(obj[0], omPurchaseOrderVO);

            MmCompanyVO mmCompanyVO = new MmCompanyVO();
            BeanUtils.copyProperties(obj[1], mmCompanyVO);
            omPurchaseOrderVO.setCompanyName(mmCompanyVO.getCode() + "-" + mmCompanyVO.getName());

            MmCustomerVO mmCustomerVO = new MmCustomerVO();
            BeanUtils.copyProperties(obj[2], mmCustomerVO);
            omPurchaseOrderVO.setCustomerName(mmCustomerVO.getCustomerId() + "-" + mmCustomerVO.getName());

            HSSFRow nextrow = sheet.createRow(rowNumber);
            HSSFCell rcell0 = nextrow.createCell(0);
            HSSFCell rcell1 = nextrow.createCell(1);
            HSSFCell rcell2 = nextrow.createCell(2);
            HSSFCell rcell3 = nextrow.createCell(3);
            HSSFCell rcell4 = nextrow.createCell(4);

            rcell0.setCellStyle(alignCenter);
            if (omPurchaseOrderVO.getPurchaseOrderNumber() != null) {
                rcell0.setCellValue(String.valueOf(omPurchaseOrderVO.getPurchaseOrderNumber()));
            }

            rcell1.setCellStyle(alignLeft);
            if (omPurchaseOrderVO.getPurchaseOrderDate() != null) {
                rcell1.setCellValue(new SimpleDateFormat("yyyy-MM-dd")
                        .parse(String.valueOf(omPurchaseOrderVO.getPurchaseOrderDate())));
                rcell1.setCellStyle(cellStyle);
            }

            rcell2.setCellStyle(alignRight);
            if (omPurchaseOrderVO.getRunningContractId() != null) {
                rcell2.setCellValue(String.valueOf(omPurchaseOrderVO.getRunningContractId()));
            }

            rcell3.setCellStyle(alignRight);
            if (omPurchaseOrderVO.getCustomerName() != null) {
                rcell3.setCellValue(omPurchaseOrderVO.getCustomerName());
            }

            rcell4.setCellStyle(alignRight);
            if (omPurchaseOrderVO.getCompanyName() != null) {
                rcell4.setCellValue(omPurchaseOrderVO.getCompanyName());
            }

            rowNumber++;
        }
        sheet.autoSizeColumn(0);
        sheet.autoSizeColumn(1);
        sheet.autoSizeColumn(2);
        sheet.autoSizeColumn(3);
        sheet.autoSizeColumn(4);

        file = new File("filePath");
        FileOutputStream fileOut = new FileOutputStream(file);
        workbook.write(fileOut);
        fileOut.close();
    }
    return file;
}

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код в хранилище

public List<Object[]> getPOList(POFilterVO poFilterVO, String action) {

String queryString = "SELECT OMP,MC,OMP.mmCustomer,RC FROM OmPurchaseOrder OMP "
                + " LEFT JOIN OMP.omRunningContract RC JOIN MmCompany MC ON MC.companyId=OMP.companyId JOIN MmCustomer MCUST "
                + " ON MCUST.customerId=OMP.mmCustomer.customerId WHERE OMP.tenantId=" + poFilterVO.getTenantId();

    queryString += " order by OMP.purchaseOrderId desc";
    LOGGER.info("Query for PO List Filter :",queryString);
    Query query = entityManager.createQuery(queryString.toString());

    if (action.equals(OrderManagementEnum.PAGINATE.getApKey())) {
        int firstResult = poFilterVO.getPage() * poFilterVO.getSize();
        query.setFirstResult(firstResult);
        query.setMaxResults(poFilterVO.getSize());
    }
    return query.getResultList();
}