hibernate关联映射总结
映射关系对象模型映射文件多对一外键关联映射
user：
?private int id;
?
?private String name;
?
?private Group group;
-------------------------------
group：
private int id;
?
private String name;
<class name="包路径.User" table="t_user">
??<id name="id">
???<generator column="groupid"/>
?</class>
--------------------------------------
<class name="包路径.Group"table="t_group">
??<id name="id">
???<generator constrained="true"/>
?</class>
---------------------------------------
<class name="包路径.IdCard" table="t_idcard">
??<id name="id">
???<generator unique="true"/>
------------------------------------------
<class name="包路径.IdCard" table="t_idcard">
??<id name="id">
???<generator unique="true"/>
?</class>
------------------------------------------
<class name="com.bjsxt.hibernate.IdCard" table="t_idcard">
??<id name="id">
???<generator property-ref="idCard"/>
?</class>
student：
?private int id;
?
?private String name;
------------------------------
classes：
?private int id;
?
?private String name;
?
?private Set students;
?
<class ame="包路径.Student"table="t_student">
??<id name="id">
???<generator table="t_classes">
??<id name="id">
???<generator column="classesid"/>
-------------------------------------------
<class name="包路径.lasses" table="t_classes">
??<id name="id">
???<generator inverse="true" cascade="all">
???<key column="classesid"/>
???<one-to-many class="Student"/>
??</set>
?</class>
