spring hibernate4 c3p0连接池配置

c3p0-0.9.1.2.jar，c3p0-oracle-thin-extras-0.9.1.2.jar，点此下载

<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:@127.0.0.1:1521:orcl"></property>
        <property name="user" value="lab"></property>
        <property name="password" value="lab"></property>
        <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 1 -->
        <property name="acquireIncrement" value="1">
        </property>
        <!--初始化时获取三个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
        <property name="initialPoolSize" value="3">
        </property>
        <!--最大空闲时间,30秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
        <property name="maxIdleTime" value="30"></property>
        <!--连接池中保留的最大连接数。Default: 15 -->
        <property name="maxPoolSize" value="15"></property>
        <!--连接池中保留的最小连接数。Default: 3 -->
        <property name="minPoolSize" value="3"></property>
        <!--两次连接中间隔时间，单位毫秒。Default: 1000 -->
        <property name="acquireRetryDelay" value="1000"></property>
        <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->
        <property name="acquireRetryAttempts" value="60"></property>
        <!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试 
            获取连接失败后该数据源将申明已断开并永久关闭。Default: false -->
    
        <property name="breakAfterAcquireFailure" value="false"></property>
    </bean>
    
    <!-- 配置SessionFactory -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
            </props>
        </property>
        <property name="annotatedClasses">
            <list>
                <value>com.portal.user.entity.User</value>
                <value>com.portal.diary.entity.DiaryBean</value>
                <value>com.portal.payout.entity.PayoutBean</value>
            </list>
            
        </property>
    </bean>