我是初学者，通过做一些样本来学习弹簧MVC。我在commons-dpcp和javax.servlet-api jar问题中收到jar问题但未正确加载。我尝试从不同的网站下载但仍然收到错误。请有人帮我解决这个问题。
Error creating bean with name 'contactsDAOImpl': Injection of autowired dependencies
failed; nested exception is org.springframework.beans.factory.BeanCreationException:
Could not autowire field: private org.hibernate.SessionFactory
com.spring.hib.dao.ContactsDAOImpl.sessionFactory; nested exception is
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class
[org.apache.commons.dpcp.BasicDataSource] for bean with name 'dataSource' defined in
ServletContext resource [/WEB-INF/dispatcher-servlet.xml]; nested exception is
java.lang.ClassNotFoundException: org.apache.commons.dpcp.BasicDataSource