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