关于hiebernate

栏目表Column

c_id是 自增的主键
c_name 栏目名
f_id  父栏目的ID
c_root 它由父栏目的c_root加上四位数字构成的，栏目调用的标记，也是唯一的

 

新闻表NewItem

n_id  自增主键
……

c_root

 

原来设的NewItem关联Column的外键是c_id

但是有与查询麻烦

所以决定把c_root设为外键

但是Column的主键是c_id

开始不知道如何设置

在网上找了半天终于找到思路

使用property-ref

 

 

 

 

有A，B 两表  A表字段 id (主键) code(唯一)  B表字段 id(主键) a_code(对应a表中的code) 如何使用 配置映射关系？ 自己搞定了， 使用property-ref. copy一段文档: 23.4.5. Associations on alternate keys <class name="Person">          <id name="id">         <generator class="hilo"/>     </id>          <property name="name" length="100"/>          <one-to-one name="address"         property-ref="person"         cascade="all"         fetch="join"/>          <set name="accounts"         inverse="true">         <key column="userId"             property-ref="userId"/>         <one-to-many class="Account"/>     </set>          <property name="userId" length="8"/> </class> <class name="Address">     <id name="id">         <generator class="hilo"/>     </id>     <property name="address" length="300"/>     <property name="zip" length="5"/>     <property name="country" length="25"/>     <many-to-one name="person" unique="true" not-null="true"/> </class> <class name="Account">     <id name="accountId" length="32">         <generator class="uuid"/>     </id>          <many-to-one name="user"         column="userId"         property-ref="userId"/>          <property name="type" not-null="true"/>      </class>

http://www2.matrix.org.cn/thread.shtml?topicId=4d5d9475-1962-11dc-8168-ef01faefba17&forumId=23

自己试了一下

终于解决

<?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="link.cms.models">     <class name="NewItem" table="cms_newitem">         <id name="n_id" column="n_id">             <generator class="identity"/>         </id>         <property name="n_title" not-null="true" column="n_title" type="string"/>         <property name="n_author" not-null="true" column="n_author" type="string"/>                 <property name="n_context" not-null="true" column="n_context" type="string"/>         <property name="n_time" not-null="true" column="n_time" type="timestamp"/>         <many-to-one name="column" column="c_root"             class="link.cms.models.Column" lazy="false" not-null="true"             unique-key="c_root" property-ref="c_root" />     </class> </hibernate-mapping>

 

 

<?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="link.cms.models">
    <class name="Column" table="cms_column">
        <id name="c_id" column="c_id">
                <generator class="identity"/>
        </id>
        <property name="c_name" not-null="true" column="c_name" type="string"/>
        <property name="c_root" not-null="true" column="c_root"
            type="string" unique="true" />
        <many-to-one name="father" column="f_id" class="link.cms.models.Column" lazy="false"/>
        <set name="children" lazy="false" cascade="delete"
            order-by="c_id">
            <key column="f_id" />
            <one-to-many class="link.cms.models.Column" />
        </set>
        <set name="newItems" order-by="n_id" cascade="delete"
            inverse="true">
            <key column="c_root" property-ref="c_root"></key>
            <one-to-many class="link.cms.models.NewItem"></one-to-many>
        </set>
    </class>    
</hibernate-mapping>