Hibernate 级联添加删除

问题描述：实体类答案从属于实体类问题。（一对多）

/**
* 添加 问题 和 选项
* @throws Exception
*/@Test
public void testQu() throws Exception {
Session session = HibernateUtil.currentSession();
Transaction tr = session.beginTransaction();

//级联添加
Set options = new HashSet();
Options op1 = new Options();
op1.setName("op1");
options.add(op1);

Options op2 = new Options();
op2.setName("op2");
options.add(op2);

Options op3 = new Options();
op3.setName("op3");
options.add(op3);
Problems problems = new Problems();

problems.setName("problem_1");
problems.setOptions(options);
problems.setTdesc("tdesc");
problems.setType(1);

Long ll = (Long)session.save(problems);

System.out.println(ll);
tr.commit();

mysql> select * from options ;
+----+------------+--------+------+---------+
| id | problemsid | answer | name | visible |
+----+------------+--------+------+---------+
|  1 |          1 |   NULL | op2  |       0 |
|  2 |          1 |   NULL | op3  |       0 |
|  3 |          1 |   NULL | op1  |       0 |
+----+------------+--------+------+---------+
3 rows in set (0.00 sec)

mysql> select * from problems ;
+----+-----------+------+-------+------------+---------+
| id | name      | type | tdesc | questionid | visible |
+----+-----------+------+-------+------------+---------+
|  1 | problem_1 |    1 | tdesc |       NULL |       0 |
+----+-----------+------+-------+------------+---------+
1 row in set (0.00 sec)

//级联删除
tr.begin();
session.delete( session.get(Problems.class,ll) );
tr.commit();

mysql> select * from problems ;
Empty set (0.00 sec)

mysql> select * from options ;
Empty set (0.00 sec)

HibernateUtil.closeSession();
}
Options类
.......
/**
* @hibernate.many-to-one
*         cascade = "save-update"
*         column = "Problemsid"
*         class = "com.zhongqi.domain.Problems"
* @return
*/
public Problems getProblems() {
return problems;
}
............

Problems 类
/**
* @hibernate.set
*         cascade="all-delete-orphan"
*         inverse = "false"
*         lazy = "true"
*         @hibernate.collection-key  column = "problemsid"
*         @hibernate.collection-one-to-many class = "com.zhongqi.domain.Options"
* @return
*/
public Set getOptions() {
return options;
}