在spring的测试单元中注入@PersistenceContext

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'noteDeFraisDAO': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'javax.persistence.EntityManagerFactory' available

这是我的测试课

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {NoteDeFraisTestConfig.class})
@Transactional

@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS)
public class NoteDeFraisDAOIT
{
    @Autowired
    private NoteDeFraisDAO noteDeFraisDAO;

    @Test
    public void myTest()
    {

    }

}

@Configuration
public class NoteDeFraisTestConfig {

    @Bean
    NoteDeFraisDAO noteDeFraisDAO()
    {
        return new NoteDeFraisDAO();
    }
}

我曾尝试将ContextConfiguration设置为applicationContext,但没有成功。我认为这是因为目录WEB-INF不属于类路径。我怎样才能解决这个问题??

这是我项目的结构

谢谢

这是我最后的测试课

@WebAppConfiguration
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"file:web/WEB-INF/applicationContext.xml", "file:web/WEB-INF/db-config.xml","file:web/WEB-INF/dispatcher-servlet.xml","file:web/WEB-INF/security-config.xml"})
@Transactional
public class NoteDeFraisDAOIT
{
    @Autowired
    private NoteDeFraisDAO noteDeFraisDAO;

    @Test
    public void myTest()
    {

    }

}