Hibernate 一对多映射文件配置

说明：一个部门对应多个员工，部门中有个员工的集合，并指定集合的名称为数据库表的名称，部门与多个员工的对象是关联的，通过员工的departmentId 与 部门对象的id进行关联
 
department 映射文件配置（一）
 
<!DOCTYPE hibernate-mapping PUBLIC
 
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 
<hibernate-mapping package="cn.itcast.h_hbm_oneToMany">
 
    <class name="Department" table="department">
 
       <id name="id">
 
           <generator class="native"></generator>
 
       </id>
 
       <property name="name"></property>
 
       <!-- employees属性，Set集合，表达的是Department与Employee的一对多
 
           inverse属性：true表示自己是否放弃维护关联关系，默认为false。
 
        -->
 
       <set name="employees" inverse="true">
 
           <key column="departmentId"></key>
 
           <one-to-many class="Employee"/>
 
       </set>
 
    </class>
 
</hibernate-mapping>
 
 
 
说明：多对一，指定多的部门唯一的列即可对应查出Department的所有信息
 
 employees 映射文件配置（多）
 
<?xml version="1.0"?>
 
<!DOCTYPE hibernate-mapping PUBLIC
 
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
 
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 
<hibernate-mapping package="cn.itcast.h_hbm_oneToMany">
 
    <class name="Employee" table="employee">
 
       <id name="id">
 
           <generator class="native"></generator>
 
       </id>
 
       <property name="name"></property>
 
       <!-- department属性，Department类型，表示Employee与Department的多对一 -->
 
       <many-to-one name="department" column="departmentId" class="Department"></many-to-one>
 
    </class>
 
</hibernate-mapping>