关于hibernate中使用all-delete-orphan的用法

比如onetomany

hibernate设置cascade="all"的话，那么在进行联机操作的时候，如果把一端设置成inverse="false"，比如one的一
方，那么many一方的与one一方失去关联关系的数据不会被删除掉，而是将关联外键设置为null，出现了孤立的数据！解决办法就是设置
cascade="all-delete-orphan"

然而这种简单的设置，会出现问题

org.springframework.orm.hibernate3.HibernateSystemException: A
collection with cascade="all-delete-orphan" was no longer referenced by
the owning entity instance: xxx.Aaa.bbbList; nested exception is
org.hibernate.HibernateException: A collection with
cascade="all-delete-orphan" was no longer referenced by the owning
entity instance: xxx.Aaa.bbbList

Caused by: org.hibernate.HibernateException: A collection with
cascade="all-delete-orphan" was no longer referenced by the owning
entity instance: xxx.Aaa.bbbList

参考了http://hi.baidu.com/ekou/blog/item/aa89e80e8df9ece436d122b4.html帖子，知道如下办法可以解决

1 在实体中把setBbbList方法设置成私有private

2 在实体中增加如下方法

public void addBbbList(Bbb b) {
getBbbList().add(b);
b.setAaa(this);
}

3 设置cascade="all-delete-orphan"

4 在dao中

DAO dao= (DAO) BeanFactory.getBean("dao");
Aaa a = dao.getAaaById(id);
a.getBbbList().clear();
a.addBbbList(b1);
a.addBbbList(b2);
a.addBbbList(b3);
dao.update(a);