spring配置异常

异常
org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: columnPojo.Column; nested exception is org.hibernate.MappingException: Unknown entity: columnPojo.Column
Caused by: org.hibernate.MappingException: Unknown entity: columnPojo.Column
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:550)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1338)
hbm.xml配置
<hibernate-mapping>
<class name="columnPojo.Column" table="column" schema="dbo" catalog="CWebDb">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="identity" />
</id>
<property name="columnName" type="java.lang.String">
<column name="columnName" length="50" not-null="true" />
</property>
<property name="columnNumber" type="java.lang.Integer">
<column name="columnNumber" not-null="true" />
</property>
</class>
代码
try {
Object c=null;
if (object instanceof Column) {
this.getHibernateTemplate().save((Column)object);
} else {
ColumnContent.class.cast(c);
this.getHibernateTemplate().save((ColumnContent)object);
}
return true;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
return false;
}
--------------------------------------------------------
解决方法：
Spring配置文件里加入
<property name="mappingResources">
<list><value>columnPojo/Column.hbm.xml</value></list>
</property></bean>

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