JPA，将复杂的数据类型的实体内同一表

Question

我有一类客户是一个实体： @Entity

public class Customer { 
@Id 
@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="customerId_Sequence") 
@SequenceGenerator(name="customerId_Sequence",sequenceName="CUSTOMER_SEQ",allocationSize=1) 
private long customerId; 
private String firstName; 
private String lastName; 
private BillingDetails billingDetails 

我有一个类BillingDetails，看起来像这样：

public class BillingDetails { 
private String type; 
private long ccNumber; 

我使用hibernate作为我的持久性提供者。我希望它在sql中创建一个表，其中有列customerId，firstName，lastName，type，ccNumber。我希望将它全部放在一张表中，我不希望账单细节成为实体。这可能吗？

当我尝试这样我得到一个错误：无法确定类型：**** BillingDetails

Answer 1

型号BillingDetails为@Embeddable。

@Entity 
public class Customer { 
@Id 
@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="customerId_Sequence") 
@SequenceGenerator(name="customerId_Sequence",sequenceName="CUSTOMER_SEQ",allocationSize=1) 
private long customerId; 
private String firstName; 
private String lastName; 

@Embedded 
private BillingDetails billingDetails; 
... 
} 



@Embeddable 
public class BillingDetails { 
private String type; 
private long ccNumber; 
... 
}