Hibernate Foreign Key exception

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;	

 

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