hibernate一对多关系时,只插入多 的问题 求大神啊 在线等 hibernate怎么实现一对多关系时,只插入多方(一方已存在),但是插入后的多方的外键,还是已存在的一方的主键。各位前辈这个该怎么实现谢谢了! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 多方的映射<hibernate-mapping> <class name="cn.jbit.houserent.bean.Street" table="street" lazy="false"> <id name="id" type="java.lang.Integer"> <column name="id" /> <generator class="sequence" > <param name="sequence">SEQ_ID</param> </generator> </id> <many-to-one name="district" class="cn.jbit.houserent.bean.District" lazy="false"> <column name="district_id" /> </many-to-one> <property name="name" type="java.lang.String"> <column name="name" length="50" not-null="true" /> </property> </class></hibernate-mapping>一方的映射<hibernate-mapping> <class name="cn.jbit.houserent.bean.District" table="district" lazy="false"> <id name="id" type="java.lang.Integer"> <column name="id" /> <generator class="sequence" > <param name="sequence">SEQ_ID</param> </generator> </id> <property name="name" type="java.lang.String"> <column name="name" length="50" not-null="true" /> </property> <!-- --> <set name="streets" table="street" cascade="all" inverse="true" lazy="false"> <key> <column name="district_id" not-null="true" /> </key> <one-to-many class="cn.jbit.houserent.bean.Street" /> </set> </class></hibernate-mapping>你看看吧,希望对你有帮助 java 中如何中断执行中的sql语句 客户端如何访问htts协议的webservice服务啊 谁有Spring的实用教程? http status 405 錯誤 sturts+Spring+Hibernate 的异常 用jaxb2把Map<String,Object>转换为xml 求大神指点就行,讲讲思路。我做可视化的期刊管理系统 请问:哪可以找到EJB的经典的例子么(新学) 求Tomcat+jsp/servlet的解决方案!! 谁在JBUILDERX的TOMCAT4.1里配成过连接池,怎么配,死求!请大家一定要帮帮忙 spring_framework_3.2的Jar包问题 求注释
<hibernate-mapping>
<class name="cn.jbit.houserent.bean.Street" table="street" lazy="false">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="sequence" >
<param name="sequence">SEQ_ID</param>
</generator>
</id>
<many-to-one name="district" class="cn.jbit.houserent.bean.District" lazy="false">
<column name="district_id" />
</many-to-one>
<property name="name" type="java.lang.String">
<column name="name" length="50" not-null="true" />
</property>
</class>
</hibernate-mapping>
一方的映射
<hibernate-mapping>
<class name="cn.jbit.houserent.bean.District" table="district" lazy="false">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="sequence" >
<param name="sequence">SEQ_ID</param>
</generator>
</id>
<property name="name" type="java.lang.String">
<column name="name" length="50" not-null="true" />
</property>
<!-- -->
<set name="streets" table="street" cascade="all" inverse="true" lazy="false">
<key>
<column name="district_id" not-null="true" />
</key>
<one-to-many class="cn.jbit.houserent.bean.Street" />
</set>
</class>
</hibernate-mapping>
你看看吧,希望对你有帮助