如何访问Spring JPA中嵌入式类的字段

@Entity
public class User {
    // other fields...

    @Embedded
    private Address address;

    // getters and setters...
}

@Embeddable
public class Address {
    private String city;

    // getters and setters...
}

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

    @Query("SELECT u.address.city FROM User u WHERE u.id = :id")
    String findCityById(@Param("id") Long id);

}