java – 我可以在JAXWS Web服务方法中返回Hibernate Entities作

的确,我有一些这样的实体：

@Entity
public class Parent {
...
    private Childone childoneByChildoneid;    
    @ManyToOne
    public
    @javax.persistence.JoinColumn(name="ChildOneId",referencedColumnName="Id")
    Childone getChildoneByChildoneid() {
        return childoneByChildoneid;
    }    
    public void setChildoneByChildoneid(Childone childoneByChildoneid) {
        this.childoneByChildoneid = childoneByChildoneid;
    }
...
}

@Entity
public class Childone {
...
    private Collection<Parent> parentsById;
    @OneToMany(mappedBy = "childoneByChildoneid")
    public Collection<Parent> getParentsById() {
        return parentsById;
    }
    public void setParentsById(Collection<Parent> parentsById) {
        this.parentsById = parentsById;
    }
...
}

并有这样的服务：

@Stateless
@WebService()
public class MasterDataService {
    @EJB
    private MasterDataManager manager;
    @WebMethod
    public Parent getParent(int parentId) {
        return manager.getParent(parentId);
    }
}
@Stateless
public class MasterDataManager {
    @PersistenceContext
    EntityManager em;

    public Parent getParent(int parentId) {
        Parent parent = (Parent) em.createQuery(
            "select p from Parent p where p.id=:parentId")
            .setParameter("parentId",parentId).getSingleResult();
        return parent;
    }
}

当我从客户端调用此Web方法时,我得到LazyInitializationException异常:(

我测试Serializable和Cloneable接口并覆盖克隆方法但不幸的是它不起作用,我在管理器中使用em.detach(父),但它仍然不起作用.

谁能帮我？

tnax