Spring 整合 Hibernate 打印 SQL

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">  
        <property name="dataSource" ref="routingDataSource" />  
        <property name="hibernateProperties">  
            <props>  
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.hbm2ddl.auto">none</prop>
<!--控制台是否打印-->
                <prop key="hibernate.show_sql">true</prop>
<!--格式化-->
                <prop key="hibernate.format_sql">true</prop>
<!--指出是什么操作生成了该语句-->
                <prop key="hibernate.use_sql_comments">true</prop>
            </props>  
        </property>  
       <property name="packagesToScan"  value="com.xiaomi.elearning.**.entity"/>
       <!-- <property name="packagesToScan"  value="com.a.b..entity"/> -->
        <property name="entityInterceptor" ref="entityInterceptor"></property>
    </bean>