Dear colleagues! Did you ever hear about Spring [persistence API] interface CrudRepository<T,U>. May be that's just me - poor newbie. But if not - this interface is awesome! You just extend it:
Ok, I'll explain. MyEntityClass - this is class, annotated with JPA annotations:
And Spring will "fill" this interface for you. Now awesome part: you can add methods to interface, that will do specialized query, based on its name:
MyCrudInterface extends CrudRepository<MyEntityClass, Long>
and that's all. :)Ok, I'll explain. MyEntityClass - this is class, annotated with JPA annotations:
@Entity
MyEntityClass {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String name;
private String category;
//....
}
And second generic type in <T,U> is id type.And Spring will "fill" this interface for you. Now awesome part: you can add methods to interface, that will do specialized query, based on its name:
MyCrudInterface extends CrudRepository<MyEntityClass, Long> {
List<MyEntity> findAll();
List<MyEntity> findByNameAndCategory(String name, String category);
Long removeByName(String);
}
Now you see? :) More than that, you can do paging and sorting. Cooool.
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