Spring整合Hibernate不会自动创建表？

配置代码如下

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<!-- 注入连接池 -->

<property name="dataSource" ref="dataSource"></property>

<!-- 配置hibernate的属性 -->

<property name="hibernateProperties">

<props>

<prop key="hibernate.dialect">org.hibernat优艾设计网_设计客e.dialect.MySQLDialect</prop>

<prop key="hibernate.show_sql">true</prop>

<prop key="hibernate.format_sql">true</prop>

<prop key="hibernate.hbm2ddl.auto">create</prop>

</props>

</property>

<!-- 加载hibernate的映射文件 -->

<property name="mappingResources">

<list>

<value>cn/hdu/employee/Department.hbm.xml</value>

<value>cn/hdu/employee/Employee.hbm.xml</value>

</list>

</property>

</bean>