public class User {
@NotNull
private String username;
@Size(min = 6, max = 12)
private String password;
}
User user = new User();
user.setUsername("admin");
user.setPassword("pass");
Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
Set<ConstraintViolation<User>> violations = validator.validate(user);
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getPropertyPath() + ": " + violation.getMessage());
}
