Exception：A Foreign key refering Province from City has the wrong number of column. should be 2
发生错误的类 City：
@Entity
@Table(name = "CITY")
@SuppressWarnings("serial")
public class City implements ICity,Serializable{
@EmbeddedId
private CityPK city_PK;
@OneToMany(mappedBy = "city", cascade = CascadeType.MERGE, fetch = FetchType.LAZY)
@Fetch(FetchMode.SUBSELECT)
private Set<Area> areas;
@ManyToOne
@JoinColumn(name = "prov_Code")
private Province province;
Get/Set method...
}
原因：Province是联合主键，应该使用如下方式：
@ManyToOne
@JoinColumns({@JoinColumn(name = "prov_Code"),@JoinColumn(name = "prov_Name")})
private Province province;
Hibernate Foreign Key exception
原文：http://www.cnblogs.com/youneverdie/p/3987574.html