Hibenate 一对一双向关联关系

@Entity
@Table(name = "Card")
public class Card {
    @Id
    @GeneratedValue
    private Integer cid;
    @Column
    private String cum;
    @OneToOne(mappedBy = "card")
    private People people;

    public Integer getCid() {
        return cid;
    }

    public void setCid(Integer cid) {
        this.cid = cid;
    }

    public String getCum() {
        return cum;
    }

    public void setCum(String cum) {
        this.cum = cum;
    }

    public People getPeople() {
        return people;
    }

    public void setPeople(People people) {
        this.people = people;
    }
}




@Entity
@Table(name = "People")
public class People {
    @Id
    @GeneratedValue
    private Integer pid;
    @Column
    private String pname;
    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "cid")
    private Card card;

    public Integer getPid() {
        return pid;
    }

    public void setPid(Integer pid) {
        this.pid = pid;
    }

    public String getPname() {
        return pname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }

    public Card getCard() {
        return card;
    }

    public void setCard(Card card) {
        this.card = card;
    }
}





public class Test {
    public static void main(String[] args) {
        Configuration cfg = new Configuration().configure();
        //session对象
        SessionFactory factory = cfg.buildSessionFactory();
        Session session = factory.openSession();
        Transaction tx = session.beginTransaction();
        Card card=new Card();
        People people=new People();
        card.setCum("卡号3");
        people.setPname("持卡人3");
        //card.setPeople(people);
        people.setCard(card);
        session.save(people);
        tx.commit();
        session.close();
    }
}