Plain Old Java Objects (POJO)

POJO and Entity

Your data object begins as a Java class. Adding JPA annotations makes it persistable; Lombok removes routine accessor, mutator, and constructor code.

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
public class Data {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;
}

• @Entity maps the class to a database table.
• @Id and @GeneratedValue define the primary key.
• @Data generates getters, setters, equals, hashCode, and toString.

Choose fields and relationships that model your own system object, then continue with the repository and controller references in Java Spring Hacks.

• Project Lombok features
• Jakarta Persistence API