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Hibernate 继承类映射----每个具体类使用一张表

<?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="com.simplye.hibernate">
    <class name="Animal" table="t_animal"> //可以设置抽象类,使抽象类不被创建   abstruct="true"
        <id name="id">
            <generator class="uuid"/> //或者手动生成assigned
        </id>
        <property name="name"/>
        <property name="sex"/>
        <union-subclass name="Pig" table="t_pig">
            <property name="weight"/>
</union-subclass>
        <union-subclass name="Brid" table="t_brid">
            <property name="height">
        </union-subclass>
    </class>
</hibernate-mapping>

posted @ 2009-03-02 01:26 simplye 阅读(156) | 评论 (0) | 编辑收藏

Hibernate 继承类映射----每个子类使用一张表

<?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="com.simplye.hibernate">
    <class name="Animal" table="t_animal">
        <id name="id">
            <generator class="native"/>
        </id>
        <property name="name"/>
        <property name="sex"/>
        <joined-subclass name="Pig" table="t_pig">
            <key column="pig"/>
            <property name="weight"/>
        </joined-subclass>
        <joined-subclass name="Bird" table="t_brid">
            <key column="brid"/>
            <property name="height"/>
        </joined-subclass>
    </class>
</hibernate-mapping>

posted @ 2009-03-01 22:46 simplye 阅读(310) | 评论 (0) | 编辑收藏

Hibernate 继承类映射----每棵类树使用一张表

<?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="com.simplye.hibernate">
    <class name="Animal" table="t_animal">
        <id name="id">
            <generator class="native"/>
        </id>
        <discriminator column="type" type="string"/>
        <property name="name"/>
        <property name="sex"/>
        <subclass name="Pig" discriminator-value="P">
        <property name="weight"/>
    </subclass>
    <subclass name="Bird" discriminator-value="B">
        <property name="height" />
    </subclass>
    </class>
</hibernate-mapping>

posted @ 2009-03-01 22:38 simplye 阅读(130) | 评论 (0) | 编辑收藏

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posted @ 2008-12-15 15:57 simplye 阅读(79) | 评论 (0) | 编辑收藏

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