java spring DriverManagerDataSource 打开了很多连接？
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spring DriverManagerDataSource opens up many connections?
提问by user1016403
I am using spring and hibernate stand-alone applications. I am using below configuration.
我正在使用 spring 和 hibernate 独立应用程序。我正在使用以下配置。
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driverClassName}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>com.some.SomePojo</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${mdm.db.dialect}</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
Is DriverManagerDataSource opens up a database connection every time data is requested? or does it reuses already opened connection? Also, does it close idle connections? to make use of the connection pooling concept do I need c3p0?
每次请求数据时，DriverManagerDataSource 是否都会打开数据库连接？还是重用已经打开的连接？另外，它会关闭空闲连接吗？要利用连接池概念，我需要 c3p0 吗？
Thanks!
谢谢！
回答by Mark Bakker
The java doc states;
Java 文档指出；
This class is not an actual connection pool; it does not actually pool Connections.
此类不是实际的连接池；它实际上并不池连接。
See for more info
查看更多信息
