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:
<!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:
<!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:
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
------最佳解决方案--------------------
+1
------其他解决方案--------------------
session.save (p1);
Idcard idcard=new Idcard();
idcard.setValidate(new Date());
idcard.setPerson(p1);
试试这样呢!
p1是临时状态,要先持久化吧!
------其他解决方案--------------------