我花了几个小时试图弄清楚为什么我的代码会引发以下异常。在这一点上,我希望有人会比我更聪明,因为我失去了希望...;)
由以下原因引起:org.springframework.beans.factory.NoSuchBeanDefinitionException:未找到类型为[com.ls.forecast.jpa.ForecastElementService]的匹配bean作为依赖项:至少需要1个有资格作为此依赖项的自动装配候选的bean。依赖项注释:{@ org.springframework.beans.factory.annotation.Autowired(required = true),@ org.springframework.beans.factory.annotation.Quali
fier(value = main)}
在org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:924)
在org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:793)
在org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707)
在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)处
我看过很多没有运气的线程/教程。他们似乎都拥有与我相同的设置。我在服务的实现上添加了@Service,添加了Qualifier,检查了ForecastElementServiceImpl是否实际实现了ForecastElementService接口。
服务界面:
public interface ForecastElementService {
Collection<ForecastElement> retrieve(String date);
Collection<ForecastElement> retrieve();
}
接口实现:
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRED)
@Repository("forecastElementService")
@Service
public class ForecastElementServiceImpl implements ForecastElementService {
@PersistenceContext
protected EntityManager em;
@Override
@Cacheable("forecastElements")
public Collection<ForecastElement> retrieve(String date) {
String sql = null;
if(date != null) {
sql = " SELECT fe FROM ForecastElement fe JOIN FETCH fe.forecastType WHERE ?1 between fe.startDate and fe.endDate";
} else {
sql = " SELECT fe FROM ForecastElement fe JOIN FETCH fe.forecastType";
}
final TypedQuery<ForecastElement> query = em.createQuery(sql, ForecastElement.class);
return query.getResultList();
}
@Override
@Cacheable("forecastElements")
public Collection<ForecastElement> retrieve() {
return retrieve(null);
}
}
context.xml:
<bean id="forecastElementService" class="com.ls.forecast.jpa.ForecastElementServiceImpl">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
最后是故障测试类-ForecastElementService变量是引发异常的类。
@Repository
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"*-context.xml"})
public class ModelJpaTest extends AbstractTransactionalJUnit4SpringContextTests {
//final Logger logger = LoggerFactory.getLogger(ModelJpaTest.class);
@Autowired
protected ForecastElementService forecastElementService;
@Autowired
@Qualifier("basicDataSource")
@Override
public void setDataSource(DataSource dataSource) {
super.setDataSource(dataSource);
}
@Test
public void LoadModelTest() {
assertNotNull("forecastElementService is null", forecastElementService);
Collection<ForecastElement> elements = forecastElementService.retrieve();
assertTrue(elements.size() > 0);
}
}
任何见解或帮助将不胜感激!
参见@ContextConfiguration ...如果我将ModelJpaTest-context.xml放在我的maven项目的资源(测试)文件夹中并编辑为:
@ContextConfiguration({"/ModelJpaTest-context.xml"})
现在真的很困惑...
最佳答案
我需要将注释配置和组件扫描添加到applicationContext.xml,以便它可以正确地“自动装配” bean。完成此操作后,我就可以摆脱测试类(forecastElementService)中的变量。