Spring Code (Enrollment-Config.xml)
-------------------------------------
<beans>

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>

<property name="url">
<value>jdbc:mysql://localhost/dbcptest</value>
</property>

</bean>

</beans>

Spring Application Code
------------------------------
public class StudentEnroller implements EnrollAStudent{
private Resource resource;
private BeanFactory factory;
private DataSource ds;
private JdbcTemplate jt;

public StudentEnroller(){
try{
resource=new ClassPathResource("Enrollment-Config.xml");
factory=new XmlBeanFactory(resource);
ds=(DataSource)factory.getBean("dataSource");

jt=new JdbcTemplate (ds);

}catch(Exception e){
//....
//log the error
}
}

There's nothing earth-shattering here!

Spring provides a choice though, you can inject dependency rather than looking for it.