我有父类Navigation
和子类ExtendingNavigation
。Navigation
被注释为@Named("navigation")
and @SessionScoped
(javax.enterprise.context.SessionScoped;)。我在其中注入并在方法UserBean
中初始化它。login()
可以说我想userBean
在其他类中使用。我该怎么做?为什么我不能从扩展Navigation
?
以下是类(仅用于示例):
导航
@Named("navigation")
@SessionScoped
public class Navigation implements Serializable {
private static final long serialVersionUID = 1L;
@Inject
protected UserBean userBean;
public void logout() {
userBean = null;
}
public void login() {
EntityManager em = JPAUtil.getEntityManagerFactory().createEntityManager();
userBean = em.find(UserBean.class, userBean.getUsername());
}
}
扩展导航
public class ExtendingNavigation extends Navigation{
}
如果我尝试编译它,它会给我一个错误。
17:01:29,956 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC00001: Failed to start service jboss.deployment.unit."timereport.war".WeldService: org.jboss.msc.service.StartException in service jboss.deployment.unit."timereport.war".WeldService: org.jboss.weld.exceptions.DeploymentException: WELD-001409 Ambiguous dependencies for type [NavigationBean] with qualifiers [@Default] at injection point [[field] @Inject timereport.ui.biz.faces.context.ValidateUserAuthenticationAction.navigation]. Possible dependencies [[Managed Bean [class timereport.navigation.NavigationBean] with qualifiers [@Any @Default @Named], Managed Bean [class timereport.navigation.ExtendingNavigation] with qualifiers [@Any @Default]]]
at org.jboss.as.weld.services.WeldService.start(WeldService.java:96)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) [:1.6.0_07]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) [:1.6.0_07]
at java.lang.Thread.run(Thread.java:619) [:1.6.0_07]
Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001409 Ambiguous dependencies for type [NavigationBean] with qualifiers [@Default] at injection point [[field] @Inject timereport.ui.biz.faces.context.ValidateUserAuthenticationAction.navigation]. Possible dependencies [[Managed Bean [class timereport.navigation.NavigationBean] with qualifiers [@Any @Default @Named], Managed Bean [class timereport.navigation.ExtendingNavigation] with qualifiers [@Any @Default]]]
at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:274)
at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:106)
at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:129)
at org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:351)
at org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:336)
at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:404)
at org.jboss.as.weld.WeldContainer.start(WeldContainer.java:82)
at org.jboss.as.weld.services.WeldService.start(WeldService.java:89)
... 5 more
请帮忙!