Question

我有一个可以进行文件上传的API。在我的api中，文件上传应该是可选的。如果用户请求没有文件和数据，API应该接受请求并将数据保存到DB。我试过如下：

@Transactional
    @RequestMapping(value = "/bugg-report", method = RequestMethod.POST)
    public @ResponseBody
    UserResponse fileUploaded(@RequestParam(required = true, value = "user_emailId") String email, @RequestParam(required = true, value = "category_id") String categoryId, @RequestParam(required = true, value = "subject") String subject, @RequestParam(required = true, value = "description") String description,
            @RequestParam(required = false, value = "uploadedFile") MultipartFile file) throws SQLException, ClassNotFoundException, IOException {
        String status = "Failed";
        BugReport bugReport = null;
        UserResponse userResponse = new UserResponse();
        User user = null;
        int bugId = 0;
        try {
            user = loginService.getUser(email);
            if (user != null) {
                int userId = user.getProfileId();
                bugId = userDao.getLastBugReportId() + 1;
                bugReport = new BugReport();
                bugReport.setUserId(userId);
                bugReport.setCategoryId(Integer.parseInt(categoryId));
                bugReport.setBugSubject(subject);
                bugReport.setBugDescription(description);
                bugReport.setReportedDate(new Date());
                bugReport.setCurrentStatus(1);
                bugReport.setLastUpdatedDate(new Date());
                bugReport.setLastUpdatedUser(userId);
                InputStream inputStream = null;
                OutputStream outputStream = null;

                //MultipartFile file = uploadedFile.getFile();
                if (!file.isEmpty()) {
                    //   fileValidator.validate(uploadedFile, result);
                    String originalFileName = file.getOriginalFilename();
                    System.out.println("originalFileName = " + originalFileName);
//                    if (result.hasErrors()) {
//                        userResponse.setCode(WeekenterConstants.FAILURE_CODE);
//                        userResponse.setMessage("Failed try again");
//                        return userResponse;
//                    }

                    try {
                        inputStream = file.getInputStream();

                        String extension = "png";//Default
                        if (originalFileName != null) {
                            if (!originalFileName.equals("")) {
                                extension = Util.getExtension(originalFileName);
                            }
                        }
                        String filename = bugId + "." + extension;
                        File newFile = new File(WeekenterConstants.IMAGES_FOLDER);

                        if (!newFile.exists()) {
                            newFile.mkdirs();
                        }
                        outputStream = new FileOutputStream(newFile + "/" + filename);
                        int read = 0;
                        byte[] bytes = new byte[1024];

                        while ((read = inputStream.read(bytes)) != -1) {
                            outputStream.write(bytes, 0, read);
                        }
                        inputStream.close();
                        outputStream.close();
                        bugReport.setImageName(filename);
                        userResponse.setCode(WeekenterConstants.SUCCESS_CODE);
                        userResponse.setMessage("Success");
                        userResponse.setEmail(email);
                        userResponse.setId(bugId);

                    } catch (IOException e) {
                        e.printStackTrace();
                        userResponse.setCode(WeekenterConstants.FAILURE_CODE);
                        userResponse.setEmail(email);
                        userResponse.setMessage("Failed try again");
                    }
                }
            } else {
                userResponse.setCode(WeekenterConstants.FAILURE_CODE);
                userResponse.setMessage("Invalid email id");
            }
        } catch (Exception e1) {
            userResponse.setCode(WeekenterConstants.FAILURE_CODE);
            userResponse.setMessage("Failed try again");
        }
        if (bugReport != null) {
            bugId = userDao.saveBugReport(bugReport);
            userResponse.setCode(WeekenterConstants.SUCCESS_CODE);
            userResponse.setEmail(email);
            userResponse.setMessage("Success");
            userResponse.setId(bugId);
        }
        return userResponse;
    }

但如果我请求没有文件就抛出

请求处理失败;嵌套异常是 org.springframework.web.multipart.MultipartException：当前请求不是多部分请求

而且我还需要知道如何发送JSON请求而不是传递参数？

使用json上传可选的多部分文件？

0 个答案: