进入指定url就可下载xlsx文件

GuestApplyService.java

//
private final static int PERSONAL_NAME_INDEX = 0;
private final static int USER_NAME_INDEX = 1;
private final static int COMPANY_NAME_INDEX = 2;
private final static int LOGIN_NAME_INDEX = 3;
private final static int APPLY_DAYS_INDEX = 4;
private final static int TELEPHONE_INDEX = 5;
private final static int APPLY_REASON_INDEX = 6;
private final static int APPLY_TIME_INDEX = 7;
//

//导出
    @Transactional
    public void exportListApplications(TenantId tenantId, String templatePath, OutputStream os) throws IOException {
        DataPage<GuestApplication> applications = this.guestApplicationRepository.getByTenantId(tenantId, 0, Integer.MAX_VALUE);
        List<GuestApplicationDTO> dtos = new ArrayList<GuestApplicationDTO>();
        for (GuestApplication guestApplication : applications.getData()) {
            dtos.add(GuestApplicationDTO.fromGuestApplication(guestApplication));
        }
        String tempPath = FileUtils.getTempDirectoryPath();
        File excelFile = new File(tempPath + "\" + generateFileName() + ".xlsx");
        File templateFile = new File(templatePath);
        FileUtils.copyFile(templateFile, excelFile);
        XSSFWorkbook wb;
        try (OPCPackage opk = OPCPackage.open(excelFile)) {
            wb = new XSSFWorkbook(opk);
            XSSFSheet sheet = wb.getSheetAt(0);
            int maxRowNum = sheet.getLastRowNum();
            XSSFRow row = null;
            GuestApplicationDTO guestApp = null;
            for (int i = 3; i < maxRowNum; i++) {
                row = sheet.getRow(i);
                if (row != null) {
                    sheet.removeRow(row);
                }
            }

            for (int i = 3; i < dtos.size() + 3; i++) {
                row = sheet.createRow(i);
                guestApp = dtos.get(i - 3);

                if (guestApp == null) {
                    continue;
                }

row.createCell(PERSONAL_NAME_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getPersonalName());
row.createCell(LOGIN_NAME_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getLoginName());
row.createCell(COMPANY_NAME_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getCompanyName());
row.createCell(USER_NAME_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getUserName());
row.createCell(APPLY_DAYS_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getApplyDays());
row.createCell(TELEPHONE_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getTelephone());
row.createCell(APPLY_REASON_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getApplyReason());
row.createCell(APPLY_TIME_INDEX, Cell.CELL_TYPE_STRING).setCellValue(guestApp.getApplyTime());

            }
            wb.write(os);
        } catch (InvalidFormatException ex) {
            throw new DkRuntimeException(ex);
        } finally {
            FileUtils.forceDelete(excelFile);
        }
    }

GuestController.java

 @RequestMapping(value = "/guest/export")
    public void exportGuest(HttpServletRequest request, HttpServletResponse response) {
        OutputStream os = null;
        String fileName = "guest_application_template.xlsx";
        try {
            response.reset();
            response.setContentType("application/octet-stream;charset=UTF-8");
            os = response.getOutputStream();
            String fileAbsolutePath = request.getSession().getServletContext()
                    .getRealPath("/")
                    + "page/resources/" + fileName;
            guestApplyApplicationService.exportListApplications(new TenantId(CurrentTenant.getInstance(request).getTenant().getId()), fileAbsolutePath, os);

        } catch (IOException e) {
            _logger.error(e.getMessage(), e);
        } finally {
            IOUtils.closeQuietly(os);
        }
    }

url: http://localhost:8080/am/controller/tenant/guest/export

guest_application_template.xlsx