Hibernate4之一对多双向关联

/**
* @author Chou
* @since 2012-8-8
* ...客户实体（一对多双向关联）
*
*/

@Entity
@Table(name = "TAB_CUSTOMER")
@SequenceGenerator(name = "seq", sequenceName = "SEQ_CUSTOMER", allocationSize = 1)
public class Customer {
private Long id;
private String cname;
private String address;
private String phone;
private Set<Order> orders = new HashSet<Order>();

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq")
public Long getId() {
return id;
}

......

@OneToMany(mappedBy = "customer", fetch = FetchType.EAGER,cascade = CascadeType.REMOVE)
//@Fetch(value = FetchMode.JOIN)
public Set<Order> getOrders() {
return orders;
}

public void setOrders(Set<Order> orders) {
this.orders = orders;
}

}

/**
* @author Chou
* @since 2012-8-8
* ...订单实体
*
*/

@Entity
@Table(name = "TAB_ORDER")
@SequenceGenerator(name = "seq", sequenceName = "SEQ_ORDER", allocationSize = 1)
public class Order {
private Long id;
private String orderno;
private Double money;
private Customer customer;

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq")
public Long getId() {
return id;
}

......

@ManyToOne
@Cascade(value = { org.hibernate.annotations.CascadeType.SAVE_UPDATE })
@JoinColumn(name = "CUSTOMERID")
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
}