22.2. Hibernate 映射

下列的XML映射应该是很直白的。

<?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="eg">
    <class 
        name="Blog" 
        table="BLOGS" >

        <id 
            name="id" 
            column="BLOG_ID">

            <generator class="native"/>

        </id>

        <property 
            name="name" 
            column="NAME" 
            not-null="true" 
            unique="true"/>

        <bag 
            name="items" 
            inverse="true" 
            order-by="DATE_TIME" 
            cascade="all">

            <key column="BLOG_ID"/>
            <one-to-many class="BlogItem"/>

        </bag>

    </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="eg">

    <class 
        name="BlogItem" 
        table="BLOG_ITEMS" 
        dynamic-update="true">

        <id 
            name="id" 
            column="BLOG_ITEM_ID">

            <generator class="native"/>

        </id>

        <property 
            name="title" 
            column="TITLE" 
            not-null="true"/>

        <property 
            name="text" 
            column="TEXT" 
            not-null="true"/>

        <property 
            name="datetime" 
            column="DATE_TIME" 
            not-null="true"/>

        <many-to-one 
            name="blog" 
            column="BLOG_ID" 
            not-null="true"/>

    </class>

</hibernate-mapping>