class User {
@NotNull
@Size(min = 5, max = 10)
private String name;
@Email
private String email;
}
class UserService {
public void registerUser(User user) {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<User>> violations = validator.validate(user);
if (!violations.isEmpty()) {
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getMessage());
}
} else {
}
}
}
