我正在试图制作购物车的物品。用户有多个项目,所以我这样做: 我有一个@Entity @Table类项目,它实现Serializableorg.hibernate.AnnotationException映射错误
private User user;
...
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@OneToMany(cascade = ALL, fetch = FetchType.EAGER, mappedBy = "items")
@Column(nullable = true, updatable = false)
public User getUser() {
return user;
}
和User.java(@Entity @Table实现Serializable):
private List<Item> items;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
...
@ManyToOne
public List<Item> getItems() {
return items;
}
public void setItems(List<Item> items) {
this.items = items;
}
我得到的是这样的错误:
Caused by: org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: org.auction.model.Item.user"}}
你已经得到了你的注释backwar DS。 '公开名单- getItems()'是OneToMany和'公共用户getUser()'是ManyToOne –