Post json data and file using ResponseEntity<> - spring

Question

I am trying to upload json data and image to a database of a form using spring rest and hibernate. I tried to test it using POSTMAN by setting form-data in body and content-type as application/json in header, but i am getting http error 400. I also tried using #RequestPart but didnt not work. I searched but could not find an example using ResponseEnity<>. I think i am doing something wrong in controller class. Please someone help me.
Without the file part i am able to add json data to db using this.
#RequestMapping(value = "/users", method = RequestMethod.POST, produces ="application/json")
public ResponseEntity<User> createAparts( #RequestBody User user) {
if (user == null) {
return new ResponseEntity<User>(HttpStatus.BAD_REQUEST);
}
userService.addAparts(user);
return new ResponseEntity<User>(user, HttpStatus.CREATED);
}
Below are the related code to issue.
model
#Entity
#Table(name = "User")
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler", "ignoreUnknown = true"})
public class User{
#Id
#Column(name = "id")
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
#Column(name = "Name")
private String Name;
#Column(name = "file_data")
private byte[] file_data;
#Column(name = "filename")
private String filename;
#JsonCreator
public ApartsData(#JsonProperty("id") int id,
#JsonProperty("Name") String Name,
#JsonProperty("filename") String filename,
#JsonProperty("file_data") byte[] file_data){
this.ad_id = ad_id;
this.Name = Name;
this.filename= filename;
this.file_data = file_data;
}
public User(){
}
DAO
#Repository
public class UserDaoImpl implements UserDao{
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory){
this.sessionFactory = sessionFactory;
}
#Override
public void addUser(User user) {
Session session = this.sessionFactory.getCurrentSession();
session.persist(user);
}
}
Service
#Service
public class UserServiceImpl implements UserService {
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
#Override
#Transactional
public void addUser(User user) {
this.userDao.addUser(user);
}
}
controller
#RestController
public class UserController {
private UserService userService;
#Autowired(required=true)
#Qualifier(value="userService")
public void setUserService(UserService userService){
this.userService = userService;
}
#RequestMapping(value = "/users", method = RequestMethod.POST,
produces ="application/json")
public ResponseEntity<User> createApartsData(#RequestBody User user,
#RequestParam("file") MultipartFile file) {
HttpHeaders headers = new HttpHeaders();
if (user == null) {
return new ResponseEntity<User>(HttpStatus.BAD_REQUEST);
}
if (!file.isEmpty()) {
try {
user.setFilename(file.getOriginalFilename());
user.setFile_data(file.getBytes());
} catch (Exception e){
e.printStackTrace();
}
}
userService.addUser(user);
headers.add("User Created - ", String.valueOf(user.getid()));
return new ResponseEntity<User>(user, headers, HttpStatus.CREATED);
}
}
UPDATE:
I am able to make it work with #RequestParam. Please some help me to make it work with #RequestBody