hibernate学习笔记第17讲-其他Set-List-Array-Map等映射

 

1,set映射：set是无序的

 2，List映射，list是有序的，表中需要保存一个索引序列存储顺序下标。

3，数组映射，跟list一样。

4，Map映射，key-value

映射关系：

<hibernate-mapping>

<class name="com.bjsxt.hibernate.CollectionMapping" table="t_CollectionMapping">

           <id name="id">

                    <generator class="native"/>

           </id>

           <property name="name"/>

//set映射

           <set name="setValue" table="t_set_value">

                    <key column="set_id"/>

                    <element type="string" column="set_value"/>

           </set>

//list映射

           <list name="listValue" table="t_list_value">

                    <key column="list_id"/>

                    <list-index column="list_index"/>

                    <element type="string" column="list_value"/>

           </list>

//array映射

           <array name="arrayValue" table="t_array_value">

                    <key column="array_id"/>

                    <list-index column="array_index"/>

                    <element type="string" column="array_value"/>

           </array>

//map映射

           <map name="mapValue" table="t_map_value">

                    <key column="map_id"/>

                    <map-key type="string" column="map_key"/>

                    <element type="string" column="map_value"/>

           </map>

</class>

</hibernate-mapping>