我是EJB的新手，正在尝试“HelloWorld”类型的EJBJava程序。这是我的EJB:packagedukesbookstore.ejb;@Stateless(name="BookRequestBean",mappedName="ejb/BookRequestBean")@NamedpublicclassBookRequestBean{//Othercodeshere}这是我的客户:Propertiesprop=newProperties();prop.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.enterprise.naming.S