如何使用jQuery文件上载和Spring引导解决java.io.FileNotFoundException

我正在尝试上载文件并将文件名保存到数据库。我已经添加了CommonMultipartResolver依赖项，并在Spring配置中定义了CommonMultipartResolver bean

错误

控制器

@PostMapping(value = "/uploadFile")
    @ResponseBody
    public ResponseEntity<Object> uploadFile(@RequestParam("uploadfile") MultipartFile uploadfile, Picture picture, Principal principal) {
        User user = (User) ((UsernamePasswordAuthenticationToken) principal).getPrincipal();
        picture.setUser(user);
        try {
            // Crop the image (uploadfile is an object of type MultipartFile)
            BufferedImage croppedImage = cropImageSquare(uploadfile.getBytes());

            // Get the filename and build the local file path
            String filename = uploadfile.getOriginalFilename();
            String directory = "/Users/molayodecker/Sites/admissionsPortal/data";
            String filepath = Paths.get(directory, filename).toString();
            String ext = FilenameUtils.getExtension(filename);

            // Save the file locally
            File outPutFile = new File(filepath);
            ImageIO.write(croppedImage, ext, outPutFile);
            //stream.write(uploadfile.getBytes());
        } catch (Exception e) {
            System.out.println(e.getMessage());
            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }
        pictureService.save(picture, uploadfile);
        return new ResponseEntity<>(HttpStatus.ACCEPTED);
    } // method uploadFile

---

我认为您的Spring应用程序中的CSRF保护已启用。 您应该在ajax请求中添加_csrf_头、_csrf e、 g:

您还可以禁用csrf\u csrf\u头->

@Configuration
public class App extends WebSecurityConfigurerAdapter {
  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable();
  }
}

---

我认为您的Spring应用程序中的CSRF保护已启用。 您应该在ajax请求中添加_csrf_头、_csrf e、 g:

您还可以禁用csrf\u csrf\u头->

@Configuration
public class App extends WebSecurityConfigurerAdapter {
  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable();
  }
}

---

我得到一个错误

无法读取未定义的属性“toLowerCase”

我不知道它为什么工作，但现在我得到一个java.io.FileNotFoundException错误请添加完整堆栈跟踪我得到一个错误

无法读取未定义的属性“toLowerCase”

我不知道它为什么工作，但现在我得到一个java.io.FileNotFoundException错误请添加完整堆栈跟踪

<form  id="upload-file-input" th:action="@{/uploadFile}" method="post" th:object="${picture}" 
enctype="multipart/form-data" class="form-inline inline new-item">
<input type="file" id="file" name="uploadfile" />
<span class="placeholder" data-placeholder="Choose an image...">Choose an image...</span>
<label for="file" class="button">Browse</label>
<button type="submit" class="btn btn-primary">Upload</button>
</form>

var $formUploader = $("#upload-file-input");
  $formUploader.on("submit", function(e){
   e.preventDefault();
   //var data = new FormData(this);
   var data={};
   $.each($(this).serializeArray(), function(i, field){
     data[field.name] = field.value;
   });
   $.ajax({
           //dataType: 'json',
           url: $formUploader.prop('action'),
           type: "POST",
           //data: new FormData($("#upload-file-input")[0]),
           data: data,
           enctype: 'multipart/form-data',
           processData: false,
           contentType: false,
           cache: false,
           success: function (data) {
             // Handle upload success
             $("#upload-file-message").text("File succesfully uploaded");
           },
           error: function () {
             // Handle upload error
             $("#upload-file-message").text("File not uploaded (File might be big, size needed.)");
           }
         });
});

var header = $("meta[name='_csrf_header']").attr("content");
var token = $("meta[name='_csrf']").attr("content"); 
$.ajax({
    url: '/test',
    type: 'POST',
    beforeSend: function(xhr){
        xhr.setRequestHeader(header, token);
    },
    success: function(data) {
        -----
    }
}

@Configuration
public class App extends WebSecurityConfigurerAdapter {
  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http.csrf().disable();
  }
}