How to handle validation errors and exceptions in a RESTful Spring MVC controller?

Question

For example, how to handle validation errors and possible exceptions in this controller action method:

@RequestMapping(method = POST)
@ResponseBody
public Fo         


        

Answer 1

@RequestMapping(method = POST)
@ResponseBody
public FooDto create(@Valid FooDTO fooDto) {
//Do my business logic here
    return fooDto;

}

Create a n exception handler:

@ExceptionHandler( MethodArgumentNotValidException.class)
@ResponseBody
@ResponseStatus(value = org.springframework.http.HttpStatus.BAD_REQUEST)
protected CustomExceptionResponse handleDMSRESTException(MethodArgumentNotValidException objException)
{

    return formatException(objException);
}

I don't know if this is the correct approach i am following. I would appreciate if you could tell me what you have done for this issue.

Answer 2

Throw an exception if you have an error, and then use @ExceptionHandler to annotate another method which will then handle the exception and render the appropriate response.