Java 无法为ejb转换ejbRef

问题公共业务

public interface QuestionCommonBusiness {

    void create(Question question);
    void update (Question question);
    void delete(Question question);
    Question read(Integer id);

    List<Question> all();
}

public interface QuestionLocalBusiness extends QuestionCommonBusiness {

}

问题管理器jb

@Stateless
@Local(QuestionLocalBusiness.class)
public class QuestionManagerEJB implements QuestionLocalBusiness {

    @PersistenceContext(unitName = "MyPU")
    private EntityManager entityManager;

    @Override
    public void create(Question question) {
        entityManager.persist(question);
    }

    @Override
    public void update(Question question) {
        entityManager.merge(question);
    }

    @Override
    public void delete(Question question) {
        entityManager.remove(question);
    }

    @Override
    public Question read(Integer id) {
        return entityManager.find(Question.class, id);
    }

    @Override
    public List<Question> all() {

        TypedQuery<Question> query = entityManager.createNamedQuery(
                "allQuestions", Question.class);
        return query.getResultList();
    }
}

上的com.myapp.interfaces.QuestionController.initialize（） com.myapp.interfaces。QuestionController@29421836

root cause

org.jboss.weld.exceptions.WeldException: WELD-000049 Unable to invoke [method] @PostConstruct public

root cause

java.lang.reflect.InvocationTargetException

root cause

java.lang.IllegalStateException: Unable to convert ejbRef for ejb QuestionManagerEJB to a business object of type interface

上的com.myapp.interfaces.QuestionController.initialize（） com.myapp.interfaces。QuestionController@29421836

root cause

org.jboss.weld.exceptions.WeldException: WELD-000049 Unable to invoke [method] @PostConstruct public

root cause

java.lang.reflect.InvocationTargetException

root cause

java.lang.IllegalStateException: Unable to convert ejbRef for ejb QuestionManagerEJB to a business object of type interface

com.myapp.application.commonbusiness

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1.1 logs.

这个问题涉及到。为

@Local

选择了错误的接口，即超快接口

您有两种选择：

只需使用

@EJB

摆脱

问题CommonBusiness

超级界面

---

不用说，首选选项1。

或者您可以在@Local注释中包含QuestionCommonBusiness.class：

   @Stateless
   @Local({QuestionLocalBusiness.class, QuestionCommonBusiness.class)
   public class QuestionManagerEJB implements QuestionLocalBusiness {
      ...

---

如果您使用

@EJB

而不是

@Inject

，它能工作吗？如果你把

@Local

放在接口上而不是具体的实现上会怎么样？当我在JSFbean中将（@）注入（@）EJB时，它就会工作。我将beans.xml放在WEB-INF文件夹中，其余项目（EJB项目、JPA项目……使用Eclipse向导制作）的META-INF中。好吧，这将是另一个焊接缺陷。在您的情况下，为

@Local

选择了错误的接口。似乎与此相关：