hibernate映射关系的配置

XML文件个人书写规范

          <!-- users属性，本类与User的一对多关系 -->

      格式：？属性，本类与？的？

      ?1 属性名

      ?2 关联对类型

      ?3 关系

配置模板

     多对一：
<many-to-one name="" class="" column="" />

    一对多（Set）：

<set name="">
<key column="" />
<one-to-many class=""/>
</set>
    多对多（Set）：
<set name="" table="">
<key column="" />
<many-to-many class="" column="" />
</set>

经典案例

        映射关系

        

        配置详情

         Department.hbm.xml

         

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="cn.cust.oa.domain">

<class name="Department" table="cust_department">
<id name="id">
<generator class="native" />
</id>
<property name="name" />
<property name="description" />

<!-- users属性，本类与User的一对多关系 -->
<set name="users">
<key column="departmentId"/>
<one-to-many class="User" />
</set>

<!-- parent属性，本类与Department（上级）的多对一关系 -->
<many-to-one name="parent" class="Department" column="parentId" />

<!-- children属性，本类与Department（下级）的一对多关系 -->
<set name="children">
<key column="parentId"/>
<one-to-many class="Department" />
</set>
</class>

</hibernate-mapping>

         User.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="cn.cust.oa.domain">

<class name="User" table="cust_user">
<id name="id">
<generator class="native" />
</id>
<property name="loginName" />
<property name="password" />
<property name="name" />
<property name="gender" />
<property name="phoneNumber" />
<property name="email" />
<property name="description" />

<!-- department属性，本类与Department的多对一关系 -->
<many-to-one name="department" class="Department" column="departmentId" />

<!-- roles属性，本类与Role的多对多关系 -->
<set name="roles" table="cust_user_role">
<key column="userId"/>
<many-to-many class="Role" column="roleId" />
</set>
</class>

</hibernate-mapping>

        
         Role.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapp
a81d
ing package="cn.cust.oa.domain">

<class name="Role" table="cust_role">
<id name="id">
<generator class="native" />
</id>
<property name="name" />
<property name="description" />

<!-- users属性，本类与User的多对多关系 -->
<set name="users" table="cust_user_role">
<key column="roleId"/>
<many-to-many class="User" column="userId" />
</set>
</class>

</hibernate-mapping>