How to implement exception handling using Spring Boot?

Spring provides an easy way to handle exceptions using ControllerAdvice annotation. We handle all exceptions thrown by the controller class by implementing a ControlerAdvice class.

Spring 3.2 brings support for a global @ExceptionHandler with the @ControllerAdvice annotation that enables a mechanism that deviates from the older MVC model of the exception handling and makes use of ResponseEntity along with the type safety and flexibility of @ExceptionHandler.

@ControllerAdvice
public class RestResponseEntityExceptionHandler 
  extends ResponseEntityExceptionHandler {
 
    @ExceptionHandler(value 
      = { EntityNotFoundException.class, MyCustomException.class, IllegalArgumentException.class, IllegalStateException.class })
    protected ResponseEntity<Object> handleConflict(
      RuntimeException ex, WebRequest request) {
        String bodyOfResponse = "Exception occurred somewhere at the application level";
        return handleExceptionInternal(ex, bodyOfResponse, 
          new HttpHeaders(), HttpStatus.CONFLICT, request);
    }
}

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.