Java Hibernate 映射异常

Question

场景如下：我正在实现一个购物车，客户可以使用 Hibernate 从产品目录中选择产品。

我得到了这个例外，但我不知道我做错了什么。

Exception in thread "main" java.lang.ExceptionInInitializerError, Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on com.OrderManagementMaven.bo.ShoppingcartItem.customer references an unknown entity: com.OrderManagementMaven.bo.Customer

at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:100) at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processEndOfQueue(InFlightMetadataCollectorImpl.java:1823) at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processFkSecondPassesInOrder(InFlightMetadataCollectorImpl .java:1767) at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1655) at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:295) at org. hibernate.boot.model.process.spi.MetadataBuildingProcess.build（MetadataBuil dingProcess.java:86) at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:479) at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:85) at com.OrderManagementMaven.HibernateUtil .(HibernateUtil.java:15)

这是我的代码：

@Entity
@Table(name = "SHOPPINGCART_ITEM")  
public class ShoppingcartItem {
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private long itemId;
    
    @ManyToOne
    @JoinColumn(name="PRODUCTID")
    private Product product;
    
    @ManyToOne
    @JoinColumn(name="CUSTOMERID")
    private Customer customer;
    
    private int amount;
    //...
}

@Entity
@Table(name = "PRODUCTCATALOG")  
public class Product {
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private long id;
    private double price;
    private String
    //...
}

@Entity  
@Table(name = "CUSTOMER")  
public class Customer{
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private long id;
    @Column(name="CUSTOMERFIRSTNAME")
    private String firstname;
    @Column(name="CUSTOMERLASTNAME")
    private String lastname;
    //...
}

我不认为错误出在注释中，因为我更改了几次，但仍然遇到相同的异常。

Answer 1

鉴于错误消息，客户实体是否不包括在扫描的包中，例如在@EntityScan注释中指定？