Hibernate的异常处理(No row with the given identifier exists)
异常详细: HTTP Status 500 - No row with the given identifier exists: [com.cc.erp.entity.Dep#3]配置详细:
<hibernate-mapping>
<class name="com.cc.erp.entity.Emp" table="emp">
<id name="uuid">
<generator class="org.hibernate.id.SequenceGenerator">
<param name="sequence">emp_seq
</param>
</generator>
</id>
<property name="username" />
<property name="pwd" />
<property name="name" />
<property name="gender" />
<property name="email" />
<property name="tele" />
<property name="address" />
<property name="birthday" />
<many-to-one name="dep" class="com.cc.erp.entity.Dep" column="depuuid"></many-to-one>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.cc.erp.entity.Dep" table="dep">
<id name="uuid">
<generator class="org.hibernate.id.SequenceGenerator">
<param name="sequence">dep_seq
</param>
</generator>
</id>
<property name="name" />
<property name="tele" />
</class>
</hibernate-mapping>
public class Emp {
private Long uuid;
private Dep dep;
}
public class Dep {
private Long uuid;
private String name;
}
ORACLE数据库中有EMP的DEP表,页面需要显示Emp对象的Dep.name - 异常产生原因及解决办法: EMP表的外键字段depuuid中含有DEP表主键字段uuid中没有的值,即DEP表中没有EMP表指定的记录,这是纯粹的数据问题,需要在映射文件中进行配置
<many-to-one name="dep" class="com.cc.erp.entity.Dep" column="depuuid" not-found="ignore"></many-to-one>
如果采用注解方式开发,则需要在指定属性上添加注解@NotFound(action=NotFoundAction.IGNORE)
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