복합키 Mapping

1. Embedded를 활용한 복합키

@Entity
@Table(name = "some_entity")
public class SomeEntity {

    @EmbeddedId
    private SomeId id;

    private String name;
}

@Embeddable
public class SomeId {

    private Long someNumer;

    private Long someString;
}

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2. IdClass를 활용한 복합키

@Entity
@IdClass(OtherId.class)
@Table(name = "other_entity")
public class OtherEntity {

    @Id
    private Long otherNumer;

    @Id
    private Long otherString;

    private String name;
}

public class OtherId {

    @Id
    private Long otherNumer;

    @Id
    private String otherString;
}