Java org.apache.poi.EmptyFileException:提供的文件为空（零字节长）

我试图使用Apache POI读取xlsx文件，但它给我以下错误： org.apache.poi.EmptyFileException:提供的文件为空（零字节长）

我的控制器是：

@PostMapping("/upload")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public ResponseEntity<SalesforceLoadUser> uploadFile(@FormDataParam("file") InputStream uploadedInputStream,
           @NotNull @NotEmpty @RequestParam @DefaultValue(value = "false") final boolean testUser) throws IOException {

        final SalesforceLoadUser sfData = salesforecEventService.uploadUserFile(uploadedInputStream, testUser);

        final ResponseEntity<SalesforceLoadUser> finalResponse = new ResponseEntity<SalesforceLoadUser>(sfData, HttpStatus.OK);
        log.debug("Data load started for test user",testUser, finalResponse.getStatusCode());

        return finalResponse;

        //return uploadSFUserFile(uploadedInputStream,testUser);
    }

@PostMapping（“/upload”）
@使用（MediaType.MULTIPART\u FORM\u数据）
公共响应上传文件（@FormDataParam（“文件”）InputStream uploadedInputStream，
@NotNull@NotEmpty@RequestParam@DefaultValue（value=“false”）final boolean testUser）抛出IOException{
最终SalesforceLoadUser sfData=SalesForceEventService.uploadUserFile（uploadedInputStream，testUser）；
最终响应最终响应=新响应（sfData，HttpStatus.OK）；
debug（“为测试用户启动数据加载”，testUser，finalResponse.getStatusCode（））；
返回最终响应；
//返回UploadsUserFile（uploadedInputStream，testUser）；
}

我的文件阅读器是：

@Override
public SalesforceLoadUser uploadUserFile(InputStream openInputStream , boolean testUsers) throws IOException {

    final SalesforceLoadUser sfUserData = new SalesforceLoadUser();
    try {
        // Finds the workbook instance for XLSX file
        Workbook myWorkBook = WorkbookFactory.create(openInputStream);


        // Return first sheet from the XLSX workbook
        Sheet mySheet = myWorkBook.getSheetAt(0);

     // Get iterator to all the rows in current sheet
      //  Iterator<Row> rowIterator = mySheet.iterator();

     // Traversing over each row of XLSX file
        int rowsCount = mySheet.getLastRowNum();
        System.out.println("Total Number of Rows: " + (rowsCount + 1));
        for (int i = 1; i <= rowsCount; i++) {
            Row row = mySheet.getRow(i);
            int colCounts = row.getLastCellNum();
            System.out.println("Total Number of Cols: " + colCounts);
            for (int j = 0; j < colCounts; j++) {

            //final Optional<CommsPhysician> checkUserRecord = repo.findPhysicianByNPI(row.getCell(0).getStringCellValue());

                sfUserData.setNPI(row.getCell(0).getStringCellValue());

                sfUserData.setFirstName(row.getCell(2).getStringCellValue());
                sfUserData.setLastName(row.getCell(3).getStringCellValue());
                sfUserData.setGender(row.getCell(14).getStringCellValue());
                sfUserData.setGradYear((int) row.getCell(16).getNumericCellValue());
                sfUserData.setClassification(row.getCell(4).getStringCellValue());
                sfUserData.setEmail(row.getCell(15).getStringCellValue());
                sfUserData.setStatus(row.getCell(1).getStringCellValue());
                sfUserData.setSpecialty(row.getCell(17).getStringCellValue());

                // Populate Roles
                if (row.getCell(6).getBooleanCellValue()) {
                    sfUserData.setJvp(row.getCell(6).getBooleanCellValue());
                }
                if (row.getCell(5).getBooleanCellValue()) {
                    sfUserData.setMd(row.getCell(5).getBooleanCellValue());

                }
                if (row.getCell(7).getBooleanCellValue()) {

                    sfUserData.setCredentialed(row.getCell(7).getBooleanCellValue());
                }

                // Populate Address
                sfUserData.setStreet(row.getCell(8).getStringCellValue());
                sfUserData.setCity(row.getCell(9).getStringCellValue());
                sfUserData.setState(row.getCell(10).getStringCellValue());

                // Populate Palmer and Division
                sfUserData.setPalmer(row.getCell(12).getStringCellValue());
                sfUserData.setDivision(row.getCell(13).getStringCellValue());

                // Set boolean for test user from request
                sfUserData.setTestUser(testUsers);

                salesforceBrokerService.publishToBroker(sfUserData);


            }
        }

       //Close the workbook
        myWorkBook.close();

    } catch (IOException | EncryptedDocumentException | InvalidFormatException e) {

        e.printStackTrace();
    } finally {
        if (openInputStream != null){
            //Close the excel input file (inputstream)  
            IOUtils.closeQuietly(openInputStream);
        }
    }

    return sfUserData;
}

@覆盖
public SalesforceLoadUser uploadUserFile（InputStream openInputStream，boolean testUsers）引发IOException{
最终SalesforceLoadUser sfUserData=新SalesforceLoadUser（）；
试一试{
//查找XLSX文件的工作簿实例
工作簿My工作簿=WorkbookFactory.create（openInputStream）；
//返回XLSX工作簿中的第一张工作表
工作表mySheet=myWorkBook.getSheetAt（0）；
//获取当前工作表中所有行的迭代器
//迭代器rowIterator=mySheet.Iterator（）；
//遍历XLSX文件的每一行
int rowsunt=mySheet.getLastRowNum（）；
System.out.println（“总行数：”+（rowsCount+1））；
对于（int i=1；i）尽管我可以想象，从阻塞流中读取时会遇到问题，但我会首先尝试（作为测试）将该InputStream存储到本地文件中。如果这看起来不错，您可能需要使用ByteArrayOutput/InputStream缓冲该InputStream，然后进行处理。