(JAVA) How to treat Exception with spring?

Question

In my model I declared this code to be unique.

@Column(unique=true, name = "codigo") private long codigo;

At the time it is displayed in the api and I inform equal codes for two employees appears to error message, how can I treat it ?

I tried to do so :

import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ResponseStatus;

@ResponseStatus(value = HttpStatus.NOT_FOUND)
public class ConstraintViolationException extends RuntimeException{
    private static final long serialVersionUID = 1L;
    
    public ConstraintViolationException(String msg) {
        super(msg);
    }

But it didn’t work, what’s missing in my code? I use java and spring boot.

Answer 1

You can create an Exceptionhandler with the @Controlleradvice annotation, as in this example here:

https://github.com/isaiastavares/ifood-microservices/blob/master/ifood-suggestion-server/src/main/java/br/com/ifood/exception/CustomizedResponseEntityExceptionHandler.java