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网上很多关于C3P0在spring+hibernate中的配置，几乎没有完全正确的,以下是根据c3p0的文档，又试验过多次，得出如下配置是正确的：
<!-- com.mchange.v2.c3p0.ComboPooledDataSource -->
<!-- start-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driverClass}" />
<property name="jdbcUrl" value="${jdbcUrl}" />
<property name="user" value="${user}" />
<property name="password" value="${password}" />
<property name="minPoolSize">
<value>4</value>
</property>
<property name="maxPoolSize">
<value>20</value>
</property>
<property name="maxIdleTime">
<value>1800</value>
</property>
<property name="acquireIncrement">
<value>2</value>
</property>
<property name="maxStatements">
<value>0</value>
</property>
<property name="initialPoolSize">
<value>2</value>
</property>
<property name="idleConnectionTestPeriod">
<value>1800</value>
</property>
<property name="acquireRetryAttempts">
<value>30</value>
</property>
<property name="breakAfterAcquireFailure">
<value>true</value>
</property>
<property name="testConnectionOnCheckout">
<value>false</value>
</property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.Oracle9Dialect
</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.generate_statistics">true</prop>
<prop key="hibernate.connection.release_mode">auto</prop>
<prop key="hibernate.autoReconnect">true</prop>
<prop key="hibernate.cglib.use_reflection_optimizer">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>ht/gisoa/entity/CmppSubmitCache.hbm.xml</value>
<value>ht/gisoa/entity/CmppDeliver.hbm.xml</value>
<value>ht/gisoa/entity/CmppSubmit.hbm.xml</value>
<value>ht/gisoa/entity/CmppReport.hbm.xml</value>
<value>ht/gisoa/entity/SGpstraceinfo.hbm.xml</value>
<value>ht/gisoa/entity/SDeviceinfo.hbm.xml</value>
<value>ht/gisoa/entity/SLbstraceinfo.hbm.xml</value>
<value>ht/gisoa/entity/Lbsschemainfo.hbm.xml</value>
</list>
</property>
</bean>
<!--end-->
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