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一對(duì)多關(guān)系式Hibernate中的重要知識(shí)。感覺在Hibernate學(xué)習(xí)中最重要的也是最難的問題就是配置文件了，對(duì)于Hibernate一對(duì)多關(guān)系的配置***.hbm.xml現(xiàn)總結(jié)如下：

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﹤?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="此處填寫包文件" ﹥

    ﹤class name="一對(duì)多中一的實(shí)體類的類名"  table="所對(duì)應(yīng)的數(shù)據(jù)庫的表名"  ﹥

       ﹤id name="所對(duì)應(yīng)的實(shí)體類的屬性(id)" column="所對(duì)應(yīng)的數(shù)據(jù)表的字段(**_id)" 
unsaved-value="null" ﹥

            ﹤generator class="native"/﹥

        ﹤/id﹥

        ﹤property name="對(duì)應(yīng)數(shù)據(jù)表中其他的字段" ﹥﹤/property﹥

﹤set name="對(duì)應(yīng)實(shí)體類中的那個(gè)集合的屬性"         
   inverse="true" lazy="true" cascade="save-update" ﹥
            ﹤key column="對(duì)應(yīng)其外鍵的字段 "/﹥
            ﹤one-to-many class="對(duì)應(yīng)一對(duì)多中多的實(shí)體類的類名"/﹥ 
        ﹤/set﹥
    ﹤/class﹥
   ﹤class name="對(duì)應(yīng)一對(duì)多中多的實(shí)體類的類名"  table="相對(duì)應(yīng)的數(shù)據(jù)表名"  ﹥

        ﹤id name="id" column="對(duì)應(yīng)表的主鍵字段名" unsaved-value="null" ﹥

            ﹤generator class="native"/﹥
        ﹤/id﹥
        ﹤property name="對(duì)應(yīng)數(shù)據(jù)表中的其他字段" ﹥﹤/property﹥
        ﹤many-to-one  name="對(duì)應(yīng)一對(duì)多中一的實(shí)體類的屬性" 
column="對(duì)應(yīng)實(shí)體類中的那個(gè)集合的屬性" ﹥
﹤/many-to-one﹥
    ﹤/class﹥
﹤/hibernate-mapping﹥

Hibernate一對(duì)多關(guān)系的配置代碼如下：

﹤!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﹥

整個(gè)的Hibernate技術(shù)就是圍繞著配置文件去發(fā)展。

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