How return error message in spring mvc Controller

Question

I am using methods like this    RequestMapping method   RequestMethod GET  public ResponseEntity lt UserWithPhoto gt  getUser  RequestHeader value  Access-key   String accessKey                                        RequestHeader value  Secret-key   String secretKey       try          return new ResponseEntity lt UserWithPhoto gt   UserWithPhoto this userService chkCredentials accessKey  secretKey  timestamp                   new HttpHeaders                    HttpStatus CREATED             catch ChekingCredentialsFailedException e           e printStackTrace            return new ResponseEntity lt UserWithPhoto gt  null new HttpHeaders   HttpStatus FORBIDDEN             And I want to return some text message when exception occurs but now I just return status and null object  Is it possible to do

User · Answer

Evaluating the error response from another service invocated...

This was my solution for evaluating the error:

try {
        return authenticationFeign.signIn(userDto, dataRequest);
    }catch(FeignException ex){

        //ex.status();

        if(ex.status() == HttpStatus.UNAUTHORIZED.value()){
            System.out.println("is a error 401");
            return new ResponseEntity<>(HttpStatus.UNAUTHORIZED);
        }
        return new ResponseEntity<>(HttpStatus.OK);

    }

User · Answer

return new ResponseEntity lt  gt  GenericResponseBean newGenericError  Error during the calling the service   -1L   HttpStatus EXPECTATION FAILED

User · Answer

Here is an alternative   Create a generic exception that takes a status code and a message   Then create an exception handler   Use the exception handler to retrieve the information out of the exception and return to the caller of the service   http   javaninja net 2016 06 throwing-exceptions-messages-spring-mvc-controller   public class ResourceException extends RuntimeException        private HttpStatus httpStatus   HttpStatus INTERNAL SERVER ERROR       public HttpStatus getHttpStatus             return httpStatus                        Constructs a new runtime exception with the specified detail message         The cause is not initialized  and may subsequently be initialized by a        call to   link  initCause           param message the detail message  The detail message is saved for later retrieval by the   link  getMessage                          method              public ResourceException HttpStatus httpStatus  String message            super message           this httpStatus   httpStatus            Then use an exception handler to retrieve the information and return it to the service caller    ControllerAdvice public class ExceptionHandlerAdvice          ExceptionHandler ResourceException class      public ResponseEntity handleException ResourceException e               log exception          return ResponseEntity status e getHttpStatus    body e getMessage                         Then create an exception when you need to   throw new ResourceException HttpStatus NOT FOUND   We were unable to find the specified resource

User · Answer

As  Sotirios Delimanolis already pointed out in the comments  there are two options   Return ResponseEntity with error message  Change your method like this    RequestMapping method   RequestMethod GET  public ResponseEntity getUser  RequestHeader value  Access-key   String accessKey                                 RequestHeader value  Secret-key   String secretKey        try              see note 1         return ResponseEntity              status HttpStatus CREATED                                body this userService chkCredentials accessKey  secretKey  timestamp              catch ChekingCredentialsFailedException e            e printStackTrace       see note 2         return ResponseEntity              status HttpStatus FORBIDDEN               body  Error Message              Note 1  You don t have to use the ResponseEntity builder but I find it helps with keeping the code readable  It also helps remembering  which data a response for a specific HTTP status code should include  For example  a response with the status code 201 should contain a link to the newly created resource in the Location header  see Status Code Definitions   This is why Spring offers the convenient build method ResponseEntity created URI     Note 2  Don t use printStackTrace    use a logger instead   Provide an  ExceptionHandler  Remove the try-catch block from your method and let it throw the exception  Then create another method in a class annotated with  ControllerAdvice like this    ControllerAdvice public class ExceptionHandlerAdvice         ExceptionHandler ChekingCredentialsFailedException class      public ResponseEntity handleException ChekingCredentialsFailedException e               log exception         return ResponseEntity                  status HttpStatus FORBIDDEN                   body  Error Message                      Note that methods which are annotated with  ExceptionHandler are allowed to have very flexible signatures  See the Javadoc for details

[java] How return error message in spring mvc @Controller

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