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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;
Hibernate Foreign Key exception
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