How to map Hibernate objects to relationships

In Hibernate, Object-Relational Mapping (ORM) is achieved through annotations or XML configurations. Here are some common mapping methods:

1. Mapping one-to-one relationships: You can use the @OneToOne annotation or tag for mapping.
2. Mapping one-to-many relationships: You can use the @OneToMany annotation or tag for mapping.
3. Mapping a one-to-many relationship: Use the @ManyToOne annotation or tag for mapping.
4. Many-to-many relationship mapping: Mapping can be done using the @ManyToMany annotation or tag. An intermediary table is needed to maintain the association.
5. Inheritance mapping: You can use the @Inheritance annotation or tag for mapping. There are three inheritance strategies to choose from: single table inheritance, one table per subclass, and one table per concrete class.
6. Composite primary key mapping: Mapping can be done using the @IdClass annotation or tag. It is necessary to create a composite primary key class that includes all primary key attributes.

The mentioned are just some common object-relational mapping methods, in fact Hibernate also provides more mapping options and annotations, developers can choose the appropriate mapping method according to their specific needs.