在HQL where子句中使用对象类型

@Entity
public class Person {
    @Id
    private int id;

    @Column
    private String name;

    @Embedded
    private Address address;

    // getters and setters
}

@Embeddable
public class Address {
    @Column
    private String street;

    @Column
    private String city;

    // getters and setters
}

String hql = "FROM Person p WHERE p.address.city = :city";
Query query = session.createQuery(hql);
query.setParameter("city", "New York");
List<Person> persons = query.list();

String hql = "FROM Person p WHERE elements(p.nicknames) = :nickname";
Query query = session.createQuery(hql);
query.setParameter("nickname", "Johnny");
List<Person> persons = query.list();