questionerBlazkowicz,

Меня просят сделать DTO Serializable и добавить serialVersionUid. Я не понимаю зачем. Нет желания писать лишний код, который никому не нужен.

Хочу узнать есть ли на самом деле причины.

https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html

Это требование интерфейса по определению


авторThe serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersionUID than that of the corresponding sender's class, then deserialization will result in an InvalidClassException. A serializable class can declare its own serialVersionUID explicitly by declaring a field named "serialVersionUID" that must be static, final, and of type long:

ANY-ACCESS-MODIFIER static final long serialVersionUID = 42L;