配置文件：
XML code:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="oracle.jdbc.driver.OracleDriver"></property>
<property name="jdbcUrl" value="jdbc:oracle:thin:@192.168.1.53:1521:ORCL"></property>
<property name="user" value="webtrack"></property>
<property name="password" value="webtrack"></property>
<!-- 这段注释掉的内容不管有或没有，都会出现下面的异常。
<property name="maxPoolSize" value="40"></property>
<property name="minPoolSize" value="3"></property>
<property name="initialPoolSize" value="3"></property>
<property name="acquireIncrement" value="3"></property>
<property name="maxIdleTime" value="20"></property>
<property name="maxStatements" value="40"></property>
<property name="idleConnectionTestPeriod" value="3"></property>
-->
</bean>
