Untitled

import java.util.regex.Pattern;

@Service
public class EmailValidationService {
    private static final Pattern EMAIL_REGEX = 
        Pattern.compile("^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$");

    public boolean isValidEmail(String email) {
        return email != null && EMAIL_REGEX.matcher(email).matches();
    }
}