在具有额外列的多对多关系中使用spring mvc herbinate的问题

@Entity
public class EntityA {
    @Id
    private Long id;
    
    // other attributes
    
    @ManyToMany
    @JoinTable(name = "middle_table",
               joinColumns = @JoinColumn(name = "entity_a_id"),
               inverseJoinColumns = @JoinColumn(name = "entity_b_id"))
    private List<EntityB> entityBs;
    
    // getters and setters
}

@Entity
public class EntityB {
    @Id
    private Long id;
    
    // other attributes
    
    @ManyToMany(mappedBy = "entityBs")
    private List<EntityA> entityAs;
    
    // getters and setters
}

@Entity
public class MiddleTable {
    @EmbeddedId
    private MiddleTableId id;
    
    // other attributes
    
    @ManyToOne
    @JoinColumn(name = "entity_a_id", insertable = false, updatable = false)
    private EntityA entityA;
    
    @ManyToOne
    @JoinColumn(name = "entity_b_id", insertable = false, updatable = false)
    private EntityB entityB;
    
    // getters and setters
}

@Embeddable
public class MiddleTableId implements Serializable {
    @Column(name = "entity_a_id")
    private Long entityAId;
    
    @Column(name = "entity_b_id")
    private Long entityBId;
    
    // getters and setters
}

@Entity
public class MiddleTable {
    @EmbeddedId
    private MiddleTableId id;
    
    @Column(name = "extra_column")
    private String extraColumn;
    
    // other attributes
    
    @ManyToOne
    @JoinColumn(name = "entity_a_id", insertable = false, updatable = false)
    private EntityA entityA;
    
    @ManyToOne
    @JoinColumn(name = "entity_b_id", insertable = false, updatable = false)
    private EntityB entityB;
    
    // getters and setters
}

@Embeddable
public class MiddleTableId implements Serializable {
    @Column(name = "entity_a_id")
    private Long entityAId;
    
    @Column(name = "entity_b_id")
    private Long entityBId;
    
    // getters and setters
}