Data Transfer Objects, known affectionately as DTOs, is the subject of a lot of discussions when we talk about the development of Java applications. DTOs were born in the Java world in EJB 2 for two purposes.
First, to circumvent the EJB serialization problem; second, they implicitly define an assembly phase where all data that will be used for presentation is marshaled before actually going to the presentation layer. Since the EJB is no longer used on a large scale, can DTOs also be discarded? The purpose of this article is to talk a little bit about the usefulness of DTO and address this question.