PropertyNotFoundException调用valueChangeListner

Question

时，我有以下简单selectOneMenu用于

<h:selectOneMenu id="shop" styleClass="tcell" 
       value="#{shoppingcenterControler.shoppingCenterScreenBean.shoppingcenterName}" 
       onchange="submit()" 
       valueChangeListener="#{shoppingcenterControler.shopChooseAction}"> 
    <f:selectItem itemValue="#{option.defaultShoppingcenter}" itemLabel="#{option.defaultShoppingcenter}"></f:selectItem> 
    <f:selectItems value="#{shoppingCenterScreenBean.shoppingcenternames}"></f:selectItems> 
</h:selectOneMenu> 

当我使用@Named注释上shoppingcenterControler我收到javax.el.PropertyNotFoundException警告我Target Unreachable, identifier 'shoppingcenterControler' resolved to null。

当我使用@ManagedBean注解我收到警告：Property 'shopChooseAction' not found on type com.manageMyShopping.presentation.controler.ShoppingcenterControler，whlie shopChooseAction不是属性，它是：

public void shopChooseAction(ValueChangeEvent event){ 
    String shopName = getShoppingCenterScreenBean().getShoppingcenterName(); 
    if (!shopName.equals(defaultShopp)) { 
     for (ShoppingCenterScreenBean thisShop : Shoppinglistcontroler.getShoppinglistScreenBean().getShoppingCentersScreenBean()) { 
      if (!thisShop.getShoppingcenterName().equals(shopName)) { 

       ShoppingCenterScreenBean newShoppingcenter = new ShoppingCenterScreenBean(); 
       newShoppingcenter.setShoppingcenterName(shopName); 
       ShoppinglistScreenBean shoppinglist = Shoppinglistcontroler.getShoppinglistScreenBean(); 
       shoppinglist.getShoppingCentersScreenBean().add(newShoppingcenter); 
      } 
     } 
    } 
} 

我看过不同的环节，包括以下内容： One somehow similar question

然而，它既不适合我，也不喜欢假的解决方案。我在寻找一个真正的解决方案，我想了解

1. 为什么因为预计@Named注释不能正常工作？我已将相应的依赖项添加到我的项目的pom.xml文件中。
2. 为什么valueChnageListener应该提出PropertyNotFoundException这个方法的名字？

任何帮助，高度赞赏。

我的环境：Fedora 24，Java 1.8，apache-tomcat 8.0.33，我正在使用Eclipse Mars。

Answer 1

我终于解决了我的问题。代替使用valueChangeListener作为标签<h:selectOneMenu>属性的我已经使用了标签<f:valueChangeListener>如下：

<h:selectOneMenu id="shop" styleClass="tcell" 
           value="#{shoppingcenterControler.shoppingCenterScreenBean.shoppingcenterName}" 
           onchange="submit()"> 
           <f:selectItem itemValue="#{option.defaultShoppingcenter}" itemLabel="#{option.defaultShoppingcenter}"></f:selectItem> 
           <f:selectItems 
            value="#{shoppingCenterScreenBean.shoppingcenternames}"></f:selectItems> 
           <f:valueChangeListener type="com.manageMyShopping.presentation.controler.ShoppingcenterListener"></f:valueChangeListener> 
</h:selectOneMenu> 

和我已经添加了类ShoppingcenterListener为：

public class ShoppingcenterListener implements ValueChangeListener { 

FacesContext context = FacesContext.getCurrentInstance(); 
String bundleName = "com.manageMyShopping.presentation.elementaryBeans.itemOptions"; 
Locale local = context.getViewRoot().getLocale(); 
ResourceBundle bundle = ResourceBundle.getBundle(bundleName, local); 
String defaultShop = bundle.getString("defaultShoppingcenter"); 

@Override 
public void processValueChange(ValueChangeEvent event) throws AbortProcessingException { 

    String shopName = event.getNewValue().toString(); 
    System.out.printf("ShoppingcenterNqme is: %s\n", shopName); 
    if (!shopName.equals(defaultShop)) { 
     for (ShoppingCenterScreenBean thisShop : Shoppinglistcontroler.getShoppinglistScreenBean().getShoppingCentersScreenBean()) { 
      if (!thisShop.getShoppingcenterName().equals(shopName)) { 

       ShoppingCenterScreenBean newShoppingcenter = new ShoppingCenterScreenBean(); 
       newShoppingcenter.setShoppingcenterName(shopName); 
       ShoppinglistScreenBean shoppinglist = Shoppinglistcontroler.getShoppinglistScreenBean(); 
       shoppinglist.getShoppingCentersScreenBean().add(newShoppingcenter); 
      } 
     } 
    } 
} 

}

这解决了我的问题。但我不明白为什么@Named注释不能如预期那样工作。