我developp与Spring MVC的4 Web应用程序的DAO层预选赛豆,我添加了一个类GenericDAO:`公共类GenericDAO {错误:未找到相关性
@PersistenceContext
private EntityManager entityManager;
private Class<T> parametrizedType;
public GenericDAO(Class<T> parametrizedType) {
this.parametrizedType = parametrizedType;
}
public EntityManager getEntityManager() {
return entityManager;
}
public List<T> executeQuery(String query){
TypedQuery<T> typedQuery = entityManager.createQuery(query, parametrizedType);
List<T> result = typedQuery.getResultList();
return result;
}
public List<T> listAll(){
List<T> result = getEntityManager().createQuery("Select t From " + parametrizedType.getSimpleName() + " t", parametrizedType).getResultList();
return result;
}
public T getById(Object id){
return getEntityManager().find(parametrizedType, id);
}
@SuppressWarnings("unchecked")
public List<T> executeNativeQuery(String query){
List<T> result = entityManager.createNativeQuery(query, parametrizedType).getResultList();
return result;
}
public List<T> executeNamedQuery(String query){
List<T> result = entityManager.createNamedQuery(query, parametrizedType).getResultList();
return result;
}
@Transactional
public void save(T entity){
entityManager.persist(entity);
}
@Transactional
public void modify(T entity){
entityManager.merge(entity);
}
@Transactional
public T find(Object id){
if(id!=null){
return entityManager.find(this.parametrizedType, id);
}
return null;
}
@Transactional
public void delete(Object id){
T t = find(id);
if(t!=null){
entityManager.remove(t);
}
}
}`
声明吾道像下面产生错误durring开始我的应用程序:
@Autowired
@Qualifier(value="partenaireDao")
private GenericDAO<VscPartenaire> partenaireDao;
错误是:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean found for dependency ....: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=partenaireDao)}
在org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1463) 在org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1094) 在有机.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1056) 在org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566)
,但它那OK with:
@Repository("partenaireDao")
公共类PartenaireDao扩展GenericDAO {
public PartenaireDao() {
super(VscPartenaire.class);
}
}
你能告诉我它的错误与我的第一个声明? 我不想为每个实体创建dao。
感谢
感谢您的回复,即使我将@Repository添加到GenericDAO,我也有同样的错误 – user19096
你能用最新的代码更新你的问题吗? –
@Repository 公共类GenericDAO { \t \t @ PersistenceContext \t私人的EntityManager EntityManager的; \t ..... –
user19096