Apachi poi для загрузки исключительного файла, возвращающего Excel, с нулевым байтом - PullRequest
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Apachi poi для загрузки исключительного файла, возвращающего Excel, с нулевым байтом

0 голосов
/ 02 апреля 2020

------- мой сервисный код -------- 

public File downloadExcelByDraw(Integer qeiMasterId, String fileName, NMTCService nmtcService) throws Exception {

        this.nmtcService = nmtcService;
        File file = null;
        Qei qeiDetails = nmtcService.getQeiDetail(qeiMasterId);
        log.info("Inside downloadExcelByDraw: " + qeiMasterId);
        file = new File(fileName);
        if(!file.exists()) {
            boolean fileCreated = file.createNewFile();
        }
        try (FileInputStream fis = new FileInputStream(file);
//here it throws empty file exception having zero bytes.
                Workbook workbook = new XSSFWorkbook(fis);) {
            log.info("Inside downloadExcelByDraw: Excel Template Name:: " + ExcelConstants.TEMPLATE_EXCEL.getName());

            Sheet templateSheet = workbook.getSheet(ExcelConstants.TEMPLATE_SHEET_NAME.getName());
            fis.close();
            if (qeiDetails != null) {
                String sheetName = ExcelConstants.SHEET_NAME_PREFIX.getName();
                try {
                    super.cloneSheet(templateSheet, sheetName);
                } catch (Exception e) {
                    log.error("Error in downloadExcelByDraw() :" + e.getStackTrace());
                }
            }
            workbook.removeSheetAt(workbook.getSheetIndex(templateSheet));

            for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
                Sheet sheet = workbook.getSheetAt(i);
                log.info("sheet index:" + i + ", sheet name: " + sheet.getSheetName());
                ExcelDataProvider excelDataProvider = new ExcelDataProvider(qeiDetails);
                fillNamedRanges(ExcelConstants.getQeiMappings(), excelDataProvider, sheet);
            }

            // file creation changed for file creation
        //  log.info("Inside downloadExcelByDraw:filePath:: " + filePath);
            FileOutputStream fos = new FileOutputStream(file, true);
            workbook.write(fos);
            workbook.close();
            log.info("Inside downloadExcelByDraw:fileCreated:: " + file);
            fos.flush();
            fos.close();
        } catch (Exception e) {
            log.error("Error in downloadExcelByDraw() :" + e.getMessage());
        }

        return file;
    }
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