c3p0 连接池

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"/>  
        <property name="jdbcUrl" value="${db.url}" />
        <property name="user" value="${db.username}" />
        <property name="password" value="${db.password}" />
        <property name="acquireIncrement" value="1"/>
        <property name="initialPoolSize" value="10"/>  
        <property name="maxIdleTime" value="60"/>  
        <property name="maxPoolSize" value="100"/>  
        <property name="minPoolSize" value="10"/>  
        <property name="acquireRetryDelay" value="1000"/>  
        <property name="acquireRetryAttempts" value="60"/>  
        <property name="breakAfterAcquireFailure" value="false"/>
    </bean>