Successful response only for entity class fields

Here is my entity class

public class Tran{

   @Id
   @NotNull
   @Column(unique = true)
   private String tranId;

   private String code;

   private String failureReason;

   @NotNull
   private Date transaDate;

   private String switchingId
}

This is my controller class

public class TranController{
    @CrossOrigin(origins = "*")
    @PostMapping(value = "/pur", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Map<String,Object>> createTran(@RequestHeader(required = false,name="request-id") String requestId,
                                                @RequestHeader(required = false,name="datetime") String requestDate,
                                                @RequestHeader(required = false,name= "channel") String requestChannel,
                                                @RequestBody TransRequestEntity createTransactionRequest,
                                                HttpServletRequest req) throws ApiBaseException {



        Tran tran = objectMapper.convertValue(createTranRequest,Trans.class);

        TransCreateResponseEntity tranCreateResponseEntity = tranCreateService.createTransaction(tran,requestId);

        Map<String,Object> trResponse = responseEntityTransformer.transform(transactionCreateResponseEntity,transCreateResponseTransformer);

        switch (transactionCreateResponseEntity.getTransactionResponseHeader().getResponseCode()){
            case "00" :
                return ResponseEntity.status(HttpStatus.OK).body(trResponse);
            case "10" : return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(trResponse);
            default: return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(trResponse);
        }
    }
}

I send this type json

{
  "tranId": "120",
  "code": "50ac",
  "transaDate": "2020/02/20",
  "switchingId": "464vc",
}

This request show the success response. there are no problem
But i send request like that

{
  "tranId": "120",
  "code": "50ac",
  "transaDate": "2020/02/20",
  "switchingId": "464vc",
  "xyz" : "test"
}

this is also show successful response, but i don't need xyz field, this field also not in the my entity class..
I want to show error massage like "bad request" if I add another field that is not in the entity class

Thank you

Spring uses the Jackson library. By default, the ObjectMapper used by the framework sets its FAIL_ON_UNKNOWN_PROPERTIES to false.

Put this in your application.properties: <br>

spring.jackson.deserialization.fail-on-unknown-properties=true

It will start failing for unrecognized properties. If you wish to handle the exception yourself, you can do so with

@ExceptionHandler(UnrecognizedPropertyException.class)

More here