hibernate中配置非主键关联(单向一对多)

from: http://hi.baidu.com/21chunan/blog/item/ac380c4c156f6ffbd62afc47.html

表结构：

create table primaryTable(
primaryTableId int primary key,
refKey varchar(16)--被关联键，注意不是id
)ENGINE=innodb

create table childTable(
childTableId int primary key,
linkRefKey varchar(16)--关联到primaryTable表中的refKey
)ENGINE=innodb

hibernate映射文件：(注意红字部分)

primaryTable.hbm.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class
name="PrimaryTable"
table="primaryTable">
<id name="id" type="java.lang.Integer">
<column name="primaryTableId"/>
<generator class="assigned"></generator>
</id>

<!-- refKey属性必须写，否则hibernate会说找不到这个属性 -->
<property name="refKey" type="java.lang.String">
<column name="refKey" length="16" />
</property>
<set name="childTables" inverse="true">
<!-- <key column="linkRefKey外键属性" property-ref="refKey" />-->
<key column="linkRefKey" property-ref="refKey" />
<one-to-many class="childTable" />
</set>
</class>
</hibernate-mapping>

childTable.hbm.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="childTable" table="childTable">
<id name="id" type="java.lang.Integer">
<column name="childTableId" />
<generator class="assigned"></generator>
</id>
<property name="linkRefKey" type="java.lang.String">
<column name="linkRefKey" length="16" />
</property>
</class>
</hibernate-mapping>

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