在注入点@Default限定符的类型 "Interface" 的未满足依赖项 [BackedAnnotatedField] @Inject "Implementation"

Question

我想在maven项目中使用CDI+JSF+HIBERNATE+PRIMEFACES的实现。我的pom.xml是这样的:

    <dependencies>
    <!-- PROJECT LOMBOK -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.6</version>
        <scope>provided</scope>
    </dependency>
    <!-- MYSQL -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.9</version>
    </dependency>
    <!-- HIBERNATE -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>3.6.3.Final</version>
    </dependency>
    <!-- CDI -->
    <dependency>
        <groupId>javax.enterprise</groupId>
        <artifactId>cdi-api</artifactId>
        <version>1.2</version>
    </dependency>
    <!-- SLF4j -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.12</version>
    </dependency>
    <!-- PRIMEFACES -->
    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>5.2</version>
    </dependency>
</dependencies>

我的项目结构是这样的，当我在不同的类中实现时，我使用泛型接口。我在3个类中实现了一个接口genericdao我在UserDao + PersonDao + RoleDao中实现它，像这样

public interface IGenericDAO<T> {
void save(T object);
void update(T object);
T getObjectById(int id);
List<T> getAll();  }

的实现是

public class UserDAOImpl implements IGenericDAO<User> {
@Override
public void save(User user) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction transaction = null;
    try {
        transaction = session.beginTransaction();
        session.save(user);
        transaction.commit();
    } catch (Exception e) {
        if (transaction != null)
            transaction.rollback();
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}
@Override
public void update(User user) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction transaction = null;
    try {
        transaction = session.beginTransaction();
        session.update(user);
        transaction.commit();
    } catch (Exception e) {
        if (transaction != null)
            transaction.rollback();
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}
@Override
public User getObjectById(int id) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    try {
        return (User) session.createCriteria(User.class).add(Restrictions.eq("id", id)).list().get(0);
    } catch (Exception e) {
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}
@SuppressWarnings("unchecked")
@Override
public List<User> getAll() {
    Session session = HibernateUtil.getSessionFactory().openSession();
    try {
        return session.createCriteria(User.class).list();
    } catch (Exception e) {
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}}

我将Service编码为，我使用泛型接口，并在3个类中实现代码，这样分开:

public interface IGenericService<T> {
void save(T object);
void update(T object);
T getObjectById(int id);
List<T> getAll(); }

实施

@RequestScoped
public class UserServiceImpl implements IGenericService<User> {
@Setter
@Inject
private IGenericDAO<User> dao;
@Override
public void save(User user) {
    dao.save(user);
}
@Override
public void update(User user) {
    dao.update(user);
}
@Override
public User getObjectById(int id) {
    return dao.getObjectById(id);
}
@Override
public List<User> getAll() {
    return dao.getAll();
}}

最后，ManagedBean是这样的:

@Named(value = "authentication")

@RequestScoped公共类AuthenticationBean实现Serializable {

private static final long serialVersionUID = 2288439665206779666L;
@Getter
@Setter
private String message;
@Setter
@Inject
private IGenericService<User> userService;
@PostConstruct
public void init() {
    message = userService.getObjectById(1).getLastname();
}}

每次我运行glassfish服务器，我有这个错误:例外0:org.jboss.weld.exceptions.DeploymentException: WELD-001408:不满足带有限定符@Default的genericdao类型的依赖关系@Inject private ma. salary .service.impl. paymentserviceimpl .dao

Answer 1

我通过在DAO和实现服务中添加@ requestscope来解决这个问题，就像这样(在我所有的DAO IMPL和Service IMPL中)

@RequestScoped public class EmployeeDAOImpl implements IGenericDAO<Employee> {
@Override
public void save(Employee Employee) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction transaction = null;
    try {
        transaction = session.beginTransaction();
        session.save(Employee);
        transaction.commit();
    } catch (Exception e) {
        if (transaction != null)
            transaction.rollback();
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}
@Override
public void update(Employee Employee) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction transaction = null;
    try {
        transaction = session.beginTransaction();
        session.update(Employee);
        transaction.commit();
    } catch (Exception e) {
        if (transaction != null)
            transaction.rollback();
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}
@Override
public Employee getObjectById(int id) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    try {
        return (Employee) session.createCriteria(Employee.class).add(Restrictions.eq("id", id)).list().get(0);
    } catch (Exception e) {
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}
@SuppressWarnings("unchecked")
@Override
public List<Employee> getAll() {
    Session session = HibernateUtil.getSessionFactory().openSession();
    try {
        return session.createCriteria(Employee.class).list();
    } catch (Exception e) {
        throw e;
    } finally {
        session.close();
        HibernateUtil.getSessionFactory().close();
    }
}

}

和这样的服务

@RequestScoped公共类EmployeeServiceImpl实现genericservice {

@Setter
@Inject
private IGenericDAO<Employee> dao;
@Override
public void save(Employee Employee) {
    dao.save(Employee);
}
@Override
public void update(Employee Employee) {
    dao.update(Employee);
}
@Override
public Employee getObjectById(int id) {
    return dao.getObjectById(id);
}
@Override
public List<Employee> getAll() {
    return dao.getAll();
}}

Answer 2

我遇到了同样的错误，但是使用了Wildfly和ejb功能。原因是在web.xml文件中有metadata-complete="true"属性。将此属性设置为false时，服务器不会扫描ejb和servlet注释。所有的功能，管理与他们不工作。

有趣的是- cdi注释工作正确。