hibernate链接数据库 Could not open Hibernate Session for transaction;

hibernate和spring集成，之前用的Mysql数据库正常，换连oracle数据库就不会了，照猫画虎但是一直连接不上Exception in thread "main" org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is java.lang.UnsupportedOperationException: The user must supply a JDBC connection
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:596)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:354)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:103)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy10.save(Unknown Source)
at com.app.APP.main(APP.java:20)
Caused by: java.lang.UnsupportedOperationException: The user must supply a JDBC connection
at org.hibernate.connection.UserSuppliedConnectionProvider.getConnection(UserSuppliedConnectionProvider.java:54)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555)
... 7 moresping配置<bean id="ds" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="oracle.jdbc.driver.OracleDriver"></property>
<property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:XE?useUnicode=true&amp;characterEncoding=UTF-8"></property>
<property name="user" value="tom"></property>
<property name="password" value="tom"></property>
</bean> <context:component-scan base-package="com" /> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
</bean>

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<tx:annotation-driven/>
[b]
hibernate配置
[/b]<hibernate-configuration> <session-factory>
<property name="dialect">
org.hibernate.dialect.Oracle9Dialect
</property>
</session-factory></hibernate-configuration>