spring boot jpa - 연관관계 매핑

@Entity
@Getter
@Setter
public class Member {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name="MEMBER_ID")
    private Long id;
    private String name;

    @ManyToOne
    @JoinColumn(name="TEAM_ID")
    private Team team;
}

@Entity
@Getter
@Setter
public class Team {
    @Id
    @GeneratedValue
    private Long id;

    private String name;
}

Team team=new Team();
team.setName("teamA");

//멤버에 팀을 id가 아니라 team자체를 set할수 있다.

Member member1=new Member();
member1.setName("홍길동");
member1.setTeam(team);

Member member2=new Member();
member2.setName("둘리");
member2.setTeam(team);

@Entity
@Getter
@Setter
public class Team {
    @Id
    @GeneratedValue
    private Long id;

    private String name;

    //mappedBy의 이름은 Member에  @JoinColum(name="TEAM_ID") 어노테이션이 붙어있는 변수의 변수name이다.
    @OneToMany(mappedBy = "team")
    List<Member> members=new ArrayList<>();
}