one-to-one:由映射文件自动生成数据库，添加数据的时候，不能两个一起添加

one-to-one:由映射文件自动生成数据库，添加数据的时候，不能两个一起添加

one-to-one:由映射文件自动生成数据库，添加数据的时候，不能两个一起添加，相关文件如下：

Idcard.hbm.xml:

Java code?<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping>     <class name="com.xyy.domain.Idcard">         <id name="id" type="java.lang.Integer">             <column name="ID" />             <generator class="foreign">                 <param name="property">person</param>             </generator>         </id>         <property name="validate" type="java.util.Date">             <column name="validate"/>         </property>         <!-- 配置one-to-one         constrained:不配置，则不会自动生成外键列，配置了，则会生成外键列          -->         <one-to-one name="person" constrained="true"/>     </class> </hibernate-mapping>

Person.hbm.xml:

Java code?<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping>     <class name="com.xyy.domain.Person">         <id name="id" type="java.lang.Integer">             <column name="ID" />             <generator class="assigned"/>         </id>         <property name="name" type="java.lang.String">             <column name="name"/>         </property>         <!-- 配置one-to-one -->         <one-to-one name="idcard" />     </class> </hibernate-mapping>

TestMain.java:

Java code?Person p1=new Person();             p1.setId(2);             p1.setName("scott1");                           Idcard idcard=new Idcard();             idcard.setValidate(new Date());             idcard.setPerson(p1);                           session.save(p1);             session.save(idcard);

报错：
org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update
Caused by: java.sql.BatchUpdateException: ORA-00928: 缺失 SELECT 关键字

用级联呀..

Java code?123456789 Person p1=new Person();             p1.setId(2);             p1.setName("scott1");                            Idcard idcard=new Idcard();             idcard.setValidate(new Date());             idcard.setPerson(p1);                      session.save(idcard);

XML/HTML code?<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping>     <class name="com.xyy.domain.Idcard">         <id name="id" type="java.lang.Integer">             <column name="ID" />             <generator class="foreign">                 <param name="property">person</param>             </generator>         </id>         <property name="validate" type="java.util.Date">             <column name="validate"/>         </property>         <!-- 配置one-to-one         constrained:不配置，则不会自动生成外键列，配置了，则会生成外键列          -->        <one-to-one name="person" constrained="true" <SPAN style="COLOR: #ff0000">cascade="save-update"</SPAN>/>     </class> </hibernate-mapping>