hibernate的关联映射

单向N-1关联
我新建一个 usersgr实体，再建立一个users将usersgr注入到users里面去
我下面就需要信息注入到映射文件中
<many-to-one name="usersgr" class="com.usersgr" not-found="ignore">
 <column name="typeid" />
</many-to-one>
那如果不加入插入与修改的信息
<many-to-one  name="usersgr" class="com.usersgr"   update="false" insert="false" not-found="ignore">
    <column name="typeid" />
</many-to-one>

双向的N—N关系 
<set name="usersgr"
table="users"
cascade="all">  
<key column="typeid" not-null="true"/> 
<many-to-many column="addressid"
  class="com.users"/>
</set>
<set name="users"
inverse="true"
table="usersgr"> 
<key column="addressid"/>
<many-to-many column="typeid"
          class="com.usersgr"/>
</set>