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>

链接地址： http://kevin12.iteye.com/blog/1763633