怎么样在spring中进行连接池使用c3p0配置参考代码？
<?xmlversion="1.0"encoding="UTF-8"?> <!DOCTYPEbeansPUBLIC"-//SPRING//DTDBEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans> <beanid="propertyConfigurer"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <propertyname="location"> <value>classpath:jdbc.properties</value> </property> </bean> <beanid="c3p0DataSource"class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <propertyname="driverClass"> <value>${db.driverClass}</value> </property> <propertyname="jdbcUrl"> <value>${db.url}</value> </property> <propertyname="properties"> <props> <propkey="c3p0.acquire_increment">5</prop> <propkey="c3p0.idle_test_period">100</prop> <propkey="c3p0.max_size">100</prop> <propkey="c3p0.max_statements">0</prop> <propkey="c3p0.min_size">10</prop> <propkey="user">${db.user}</prop> <propkey="password">${db.pass}</prop> </props> </property> </bean> <beanid="sessionFactory"class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <propertyname="hibernateProperties"> <props> <propkey="hibernate.dialect">${hibernate.dialect}</prop> <propkey="hibernate.show_sql">${hibernate.show_sql}</prop> </props> </property> <propertyname="dataSource"ref="c3p0DataSource"/> <propertyname="annotatedClasses"value="martin.dwr.demo.model.User"/> </bean> <beanid="userDao"class="martin.dwr.demo.dao.hibernate.HibernateUserDAO"> <propertyname="sessionFactory"ref="sessionFactory"/> </bean> </beans>怎么样在spring中进行连接池使用c3p0配置参考代码？
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