如何在Spring中向我的joinTable添加额外的列？

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

    // 其他属性...

    @ManyToMany
    @JoinTable(
        name = "join_table",
        joinColumns = @JoinColumn(name = "entity_a_id"),
        inverseJoinColumns = @JoinColumn(name = "entity_b_id")
    )
    private List<EntityB> entityBs;

    // 其他方法...
}

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

    // 其他属性...

    // 其他方法...
}

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

    @ManyToOne
    @JoinColumn(name = "entity_a_id")
    private EntityA entityA;

    @ManyToOne
    @JoinColumn(name = "entity_b_id")
    private EntityB entityB;

    private String extraColumn;

    // 其他方法...
}