You want to create a global exception handler in Spring Boot that returns a JSON error with 404 status and a message when any ResourceNotFoundException occurs. Which approach correctly achieves this?
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Spring Boot - Exception Handling
You want to create a global exception handler in Spring Boot that returns a JSON error with 404 status and a message when any ResourceNotFoundException occurs. Which approach correctly achieves this?
AUse <code>@RestController</code> on the exception class and return 404 status
BAnnotate <code>ResourceNotFoundException</code> with <code>@ResponseStatus(HttpStatus.NOT_FOUND)</code> only, no handler needed
CCreate a class annotated with <code>@ControllerAdvice</code> and a method with <code>@ExceptionHandler(ResourceNotFoundException.class)</code> returning <code>ResponseEntity</code> with status 404 and error body
DThrow <code>ResponseStatusException</code> with 404 inside every controller method manually
Step-by-Step Solution
Solution:
Step 1: Understand global exception handling
Using @ControllerAdvice with @ExceptionHandler allows centralized handling of exceptions across controllers.
Step 2: Return ResponseEntity with 404 and JSON body
The handler method can build a ResponseEntity with HttpStatus.NOT_FOUND and a JSON error message for clients.
Final Answer:
Create a class annotated with @ControllerAdvice and a method with @ExceptionHandler(ResourceNotFoundException.class) returning ResponseEntity with status 404 and error body -> Option C
Quick Check:
Global handler + ResponseEntity = custom 404 JSON [OK]
Quick Trick:Use @ControllerAdvice + @ExceptionHandler for global JSON 404 [OK]
Common Mistakes:
Relying only on @ResponseStatus without custom JSON body
Annotating exception class as controller
Manually throwing exceptions in every method
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