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Json – my @RequestBody annotation is not parsing my object

I am having a problem, where I send a request with a Json body, and the parser is not changing that Json into the desired Java object, it is returning that object with all the parameters null:

This is the request from postman:

POST http://localhost:8084/api/user/user

body: {
    "name": "Santiago",
    "email": "yes",
    "number": "4",
    "password": "rftgybn",
    "date_of_birth": "2024-11-06T12:30:00Z",
    "location": "Medellin"
}

This is the request shown by my springboot filter I made (I made it so I could verify the request is correct, the problem existed before making that filter):

POST "/api/user/user", parameters={}

Request Body: {
  "name": "string",
  "email": "string",
  "number": "string",
  "password": "string",
  "date_of_birth": "2024-11-07T11:27:15.086Z",
  "location": "string"
}

This is my DTO object:

@Getter
@ToString
@NoArgsConstructor
public class UserRegisterRequestDTO {
    @JsonProperty("name")
    private String name;
    @JsonProperty("email")
    private String email;
    @JsonProperty("number")
    private String number;
    @JsonProperty("password")
    private String password;
    @JsonProperty("date_of_birth")
    private Date dateOfBirth;
    @JsonProperty("location")
    private String location;
}

This is my controller method that is being invoked:

@RestController
@RequestMapping("/user")
@CrossOrigin(origins = "*")
public class UserControllerImplementation implements UserController {
    @Override
    @PostMapping(produces = "application/json")
    public ResponseEntity<UserBasicDTO> createUser(@RequestBody UserRegisterRequestDTO user) {
        System.out.println("nnCreating user");
        System.out.println(user);
        return ResponseEntity.status(HttpStatus.CREATED).body(userService.createUser(user));
    }
}

Those System.out.println() are printing the following:

Creating user
UserRegisterRequestDTO(name=null, email=null, number=null, password=null, dateOfBirth=null, location=null)

I have been trying for a day now, and I do not know what else to do. Please help, and thanks a lot!

Tags:

4

Answers


  1. Chosen as BEST ANSWER
    0

    Turns out, that when adding the @RequestBody annotation, I was importing the annotation from Swagger, not the annotation from Springframework.web.bind.annotation.

    In Summary, I was importing the wrong @RequestBody. :(


  2. 0

    It’s working for me with the same code you have.
    Try adding @AllArgsConstructor and @Setter on DTOs.

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  3. 0

    Are you using the Body parameter in Postman with raw selected and JSON as the type?

    If not, try using the following curl command into your terminal:

    curl --location 'http://localhost:8084/api/user/user' 
--header 'Content-Type: application/json' 
--data '{
    "name": "Santiago",
    "email": "yes",
    "number": "4",
    "password": "rftgybn",
    "date_of_birth": "2024-11-06T12:30:00Z",
    "location": "Medellin"
}'
    Login or Signup to reply.
  4. 0

    Try this:

    @Getter
@ToString
@NoArgsConstructor
@AllargsConstructor
public class UserRegisterRequestDTO {
    @JsonProperty("name")
    private String name;
    @JsonProperty("email")
    private String email;
    @JsonProperty("number")
    private String number;
    @JsonProperty("password")
    private String password;
    @JsonProperty("date_of_birth")
    private Date dateOfBirth;
    @JsonProperty("location")
    private String location;
}

    For working objectMapper that deserialization and serialization in java. dto must have default constructor and constructor that all field in dto.

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