[org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'image' is not present]答案

【问题标题】：[org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'image' is not present][org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'image' is not present]
【发布时间】：2021-12-04 17:07:07
【问题描述】：

我尝试将具有某些属性的图像从颤振发送到 Spring Boot 端点，但 Spring Boot 根本没有收到该图像，它给了我这个错误：

Resolved [org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'image' is not present]

这是我的代码：

弹簧靴

@PostMapping("")
public ResponseEntity<UsersEntity> createNewUser(@RequestParam(value = "image") MultipartFile image, UsersEntity user) {
    UsersEntity response = userService.createUser(user, image);
    return ResponseEntity.ok(response);
}

颤动

var postUri = Uri.parse("http://localhost:8080/v1");
var request = new http.MultipartRequest("POST", postUri);
request.fields['fName'] = firstNameController.text;
request.fields['lName'] = lastNameController.text;
if(image != null) {
  request.files.add(http.MultipartFile.fromBytes(
      'image', image!, contentType: MediaType.parse('multipart/form-data')));
}

Map<String, String> headers = {
  "Access-Control-Allow-Origin": "*",
  "Access-Control-Allow-Credentials": "true",
  "Access-Control-Allow-Headers": "Origin,Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token,locale",
  "content-type": "application/json"};
request.headers.addAll(headers);

request.send().then((response) {
  if (response.statusCode == 200) {
    print("Success!");
  } else {
    print('Error!');
  }
});

我的服务与 Postman 配合得很好，知道如何解决这个问题吗？

【问题讨论】：

标签： java spring-boot flutter dart multipart

【解决方案1】：

解决方案

感谢https://github.com/flutter/flutter/issues/37311#issuecomment-516967285

我只需添加filename，一切正常：

request.files.add(http.MultipartFile.fromBytes(
    'image', image!, 
    contentType: MediaType.parse('multipart/form-data'), 
    filename: 'test.jpg'));

【讨论】：

【解决方案2】：

  var uri = Uri.parse('$baseUrl/services/selfemployment/check-confirmation-code');
  var request = new http.MultipartRequest("POST", uri);

   request.headers.addAll(baseHeader);
   request.fields['example'] = example;
   request.fields['image'] = image;
   http.Response response = await http.Response.fromStream(await request.send());
   print('Uploaded! ${response.body} ++ ${response.statusCode}');

【讨论】：