只用hibernate与druid的配置问题:配置无效 

@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>

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)