只用hibernate与druid的配置问题 ：报错

@玛雅牛 你好，想跟你请教个问题：

只使用了hibernate4.2.2，druid1.0.9，找了半天配置，最后的错误是：org.hibernate.HibernateException: Could not instantiate connection provider:com.alibaba.druid.support.hibernate.DruidConnectionProvider

配置如下

<session-factory>
	<property name="connection.provider_class">com.alibaba.druid.support.hibernate.DruidConnectionProvider</property>
	
	<!-- 配置初始化大小、最小、最大 -->
	<property name="initialSize">1</property>
	<property name="minIdle">1</property>
	<property name="maxActive">20</property>

	<!-- 配置获取连接等待超时的时间 -->
	<property name="maxWait">60000</property>

	<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
	<property name="timeBetweenEvictionRunsMillis">60000</property>

	<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
	<property name="minEvictableIdleTimeMillis">300000</property>

	<property name="validationQuery">SELECT 'x'</property>
	<property name="testWhileIdle">true</property>
	<property name="testOnBorrow">false</property>
	<property name="testOnReturn">false</property>

	<!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
	<property name="poolPreparedStatements">true</property>
	<property name="maxPoolPreparedStatementPerConnectionSize">20</property>

	<!-- 配置监控统计拦截的filters，去掉后监控界面sql无法统计 -->
	<property name="filters">stat</property>


	<!-- sessionFactory properties -->
	<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
	<property name="connection.url">jdbc:oracle:thin:@10.152.223.51:1521:qybi</property>
	<property name="connection.username">qybi</property>
	<property name="connection.password">qybi123</property>
	<property name="show_sql">false</property>
</session-factory>

QQ：812229694

Configuration conf = new Configuration().configure();
System.out.println(conf);
SessionFactory factory = conf.buildSessionFactory();

在标注处出错

org.hibernate.cfg.Configuration@1581593
Exception in thread "main" java.lang.NullPointerException
	at com.alibaba.druid.util.JdbcUtils.getDriverClassName(JdbcUtils.java:354)
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:577)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:915)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:911)
	at com.alibaba.druid.support.hibernate.DruidConnectionProvider.getConnection(DruidConnectionProvider.java:52)
	at org.hibernate.engine.jdbc.internal.JdbcServicesImpl$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcServicesImpl.java:242)
	at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:117)
	at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)
	at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)
	at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
	at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1797)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1755)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1840)
	at com.test.GetSession.getSen(GetSession.java:13)
	at com.test.Test.main(Test.java:49)