在注入点 [BackedAnnotatedField] @Inject "Implementation" 带有限定符 @Default 的类型 "Interface" 的不满足依赖关系
Unsatisfied dependencies for type "Interface" with qualifiers @Default at injection point [BackedAnnotatedField] @Inject "Implementation"
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,我在不同的Class中实现时使用通用接口。
我用 3 classes 实现的一个接口
IGenericDAO 我是这样在 UserDao + PersonDao + RoleDao 中实现的
public interface IGenericDAO<T> {
void save(T object);
void update(T object);
T getObjectById(int id);
List<T> getAll(); }
实施是
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();
}
}}
像这样我将服务编码为,我使用通用接口并在 3 classes separetaded 中实现代码,如下所示:
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
public class 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 服务器我都有这个错误:
异常 0:
org.jboss.weld.exceptions.DeploymentException:WELD-001408:带有限定符@Default 的类型 IGenericDAO 的不满足依赖关系
在注入点 [BackedAnnotatedField] @Inject private ma.salaried.service.impl.PaymentServiceImpl.dao
我通过在 DAO 的实现和实现 od Service 中添加 @RequestScoped 解决了这个问题(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
public class EmployeeServiceImpl 实现 IGenericService {
@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();
}}
我遇到了同样的错误,但使用 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。由他们管理的所有功能都不起作用。
有趣的是 - cdi 注释确实可以正常工作。
解决方案:要么删除它,要么设置为 false。
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,我在不同的Class中实现时使用通用接口。 我用 3 classes 实现的一个接口 IGenericDAO 我是这样在 UserDao + PersonDao + RoleDao 中实现的
public interface IGenericDAO<T> {
void save(T object);
void update(T object);
T getObjectById(int id);
List<T> getAll(); }
实施是
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();
}
}}
像这样我将服务编码为,我使用通用接口并在 3 classes separetaded 中实现代码,如下所示:
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 public class 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 服务器我都有这个错误: 异常 0: org.jboss.weld.exceptions.DeploymentException:WELD-001408:带有限定符@Default 的类型 IGenericDAO 的不满足依赖关系 在注入点 [BackedAnnotatedField] @Inject private ma.salaried.service.impl.PaymentServiceImpl.dao
我通过在 DAO 的实现和实现 od Service 中添加 @RequestScoped 解决了这个问题(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 public class EmployeeServiceImpl 实现 IGenericService {
@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();
}}
我遇到了同样的错误,但使用 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。由他们管理的所有功能都不起作用。
有趣的是 - cdi 注释确实可以正常工作。
解决方案:要么删除它,要么设置为 false。