Hibernate一对多关系的处理-hibernate 其他

一对多关系式Hibernate中的重要知识。感觉在Hibernate学习中最重要的也是最难的问题就是配置文件了，对于Hibernate一对多关系的配置***.hbm.xml现总结如下：

﹤?xml version="1.0" encoding="gbk"?﹥

﹤!DOCTYPE hibernate-mapping PUBLIC 

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"﹥   

﹤hibernate-mapping  package="此处填写包文件" ﹥

    ﹤class name="一对多中一的实体类的类名"  table="所对应的数据库的表名"  ﹥

       ﹤id name="所对应的实体类的属性(id)" column="所对应的数据表的字段(**_id)" 
unsaved-value="null" ﹥

            ﹤generator class="native"/﹥

        ﹤/id﹥

        ﹤property name="对应数据表中其他的字段" ﹥﹤/property﹥

﹤set name="对应实体类中的那个集合的属性"         
   inverse="true" lazy="true" cascade="save-update" ﹥
            ﹤key column="对应其外键的字段 "/﹥
            ﹤one-to-many class="对应一对多中多的实体类的类名"/﹥ 
        ﹤/set﹥
    ﹤/class﹥
   ﹤class name="对应一对多中多的实体类的类名"  table="相对应的数据表名"  ﹥

        ﹤id name="id" column="对应表的主键字段名" unsaved-value="null" ﹥

            ﹤generator class="native"/﹥
        ﹤/id﹥
        ﹤property name="对应数据表中的其他字段" ﹥﹤/property﹥
        ﹤many-to-one  name="对应一对多中一的实体类的属性" 
column="对应实体类中的那个集合的属性" ﹥
﹤/many-to-one﹥
    ﹤/class﹥
﹤/hibernate-mapping﹥

Hibernate一对多关系的配置代码如下：

﹤!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"﹥ ﹤hibernate-mapping package="entity.test" ﹥ ﹤class name="Person" table="Person1" ﹥ ﹤id name="pid" column="p_id" unsaved-value="null" ﹥ ﹤generator class="native"/﹥ ﹤/id﹥ ﹤property name="name" ﹥﹤/property﹥ ﹤set name="computers" inverse="true" lazy="true" cascade="save-update" ﹥ ﹤key column="p_id"/﹥ ﹤one-to-many class="Computer"/﹥ ﹤/set﹥ ﹤/class﹥ ﹤class name="Computer" table="Computer" ﹥ ﹤id name="id" column="c_id" unsaved-value="null" ﹥ ﹤generator class="native"/﹥ ﹤/id﹥ ﹤property name="name" ﹥﹤/property﹥ ﹤many-to-one name="person" column="p_id" ﹥﹤/many-to-one﹥ ﹤/class﹥ ﹤/hibernate-mapping﹥ ﹤!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"﹥ ﹤hibernate-mapping package="entity.test" ﹥ ﹤class name="Person" table="Person1" ﹥ ﹤id name="pid" column="p_id" unsaved-value="null" ﹥ ﹤generator class="native"/﹥ ﹤/id﹥ ﹤property name="name" ﹥﹤/property﹥ ﹤set name="computers" inverse="true" lazy="true" cascade="save-update" ﹥ ﹤key column="p_id"/﹥ ﹤one-to-many class="Computer"/﹥ ﹤/set﹥ ﹤/class﹥ ﹤class name="Computer" table="Computer" ﹥ ﹤id name="id" column="c_id" unsaved-value="null" ﹥ ﹤generator class="native"/﹥ ﹤/id﹥ ﹤property name="name" ﹥﹤/property﹥ ﹤many-to-one name="person" column="p_id" ﹥﹤/many-to-one﹥ ﹤/class﹥ ﹤/hibernate-mapping﹥

整个的Hibernate技术就是围绕着配置文件去发展。

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