Hibernate多对一删除问题

为什么我只能删除多方的，而不能删除一方的

1.这是删除的方法 public void delete(Library library){
session = HibernateUtil.getSession();
try {
session.beginTransaction();
session.delete(library);
session.getTransaction().commit();
} catch (Exception e) {
e.printStackTrace();
session.getTransaction().rollback();
}
}

2.这是多方





<!-- properties are mapped to columns of table -->

    <property name="author" type="string" not-null="true">
        <column name="author"></column>
    </property>

    <many-to-one name="lkind" cascade="all" class="com.entity.Lkind">
        <column name="lk_id"></column>
    </many-to-one>
</class>

3.这是一方





<!-- properties are mapped to columns of table -->









4.这是servlet
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
int id = Integer.parseInt(request.getParameter("id"));
Library library = new Library();
library.setId(id);
Grand g=new Grand();
g.delete(library);
request.getRequestDispatcher("information.jsp").forward(request, response);
}

如果你把一的那方删除了，多的数据怎么办，不剩下整成干瞪眼儿了

应该是你创建表的时候设置了级联删除吧。。。