spring4配置hibernate4 hibernate.hbm2ddl.auto无效

2014-04-22 03:48:00 334 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Sping Data Jpa配置问题 spring.jpa.properties.hibernate.hbm2ddl.auto=update 在配置spring data jpa时，如果spring.jpa.properties.hibernate.hbm2ddl.auto设置为update,会自动更新数据表结构，比如Entity中增加成员变量，数据表中也会增加相应的字段，但是需要注意的是，如果删除一个成员变量，这时数据表中不会自动删除对应的字段,如果删除的那个成员变量在数据表中被设置为not null，当再次运行时就会报错，如下面的例... 阅读详情

我在Spring文件里配置了hibernate4,但是hibernate.hbm2ddl.auto没有自己创建schema,请闻如何解决

配置文件如下
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
">

<context:component-scan base-package="com.springapp.mvc"/>

<mvc:annotation-driven />

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/education?characterEncoding=utf8" />
<property name="user" value="root" />
<property name="password" value="" />
<property name="minPoolSize" value="5" />
<property name="maxPoolSize" value="20" />
<property name="initialPoolSize" value="2" />
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.springapp.model"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">create</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>

...全文