How do I customize default error message from spring @Valid validation?

Question

DTO:

public class User {

    @NotNull
    private String name;

    @NotNull
    private String password;

    //..
}

Controller:

Answer 1

I know this is kind of old question,

But I just run into it and I found some pretty good article which has also a perfect example in github.

Basically it uses @ControllerAdvice as Spring documentation suggests.

So for example catching 400 error will be achieved by overriding one function:

@ControllerAdvice
public class CustomRestExceptionHandler extends ResponseEntityExceptionHandler {

    @Override
    protected ResponseEntity