这是一个使用标准父/子范例的示例，我认为应该使用基本的@Where注释来工作。
public class A { ... @ManyToOne(fetch = FetchType.EAGER) // EAGER forces outer join @JoinColumn(name = "a_id") @Where(clause = "a_id = id or a_id is null") // "id" is A's PK... modify as needed public B getB() { return b; }}public class B { ... @oneToMany(mappedBy = "b") public List<A> getA() { return a; }}
