通过@ManagedProperty注入ResourceBundle似乎在@Named中不起作用

Question

如何从java代码访问消息包以根据当前区域设置获取消息？

我尝试使用@ManagedProperty如下:

@Named 
@SessionScoped 
public class UserBean implements Serializable {

    @ManagedProperty("#{msg}")
    private ResourceBundle bundle;

    // ...

    public void setBundle(ResourceBundle bundle) {
        this.bundle = bundle;
    }

}

但是,它仍然存在null.它似乎在一个内部不起作用@Named.

这是我在faces-context.xml以下方面注册资源包的方式:

<application>

    <message-bundle>validator.messages</message-bundle>

    <locale-config>
        <supported-locale>en_US</supported-locale>
        <supported-locale>ua_UA</supported-locale>
    </locale-config>

    <resource-bundle>
        <base-name>lang.messages</base-name>
        <var>msg</var>
    </resource-bundle>

</application>

作者的作者:

@BalusC我收到错误

16:29:10,968 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/WEBSearchPrime_JB_lang].[Faces Servlet]] (http-localhost-127.0.0.1-8080-1) Servlet.service() for servlet Faces Servlet threw exception: org.jboss.weld.exceptions.IllegalProductException: WELD-000054 Producers cannot produce non-serializable instances for injection into non-transient fields of passivating beans\\n\\nProducer\: Producer Method [PropertyResourceBundle] with qualifiers [@Any @Default] declared as [[method] @Produces public util.BundleProducer.getBundle()]\\nInjection Point\: [field] @Inject private model.UserBean.bundle

注意,我也把Serializable接口

Answer 1

您不能@ManagedProperty在CDI托管bean中使用注释@Named.您只能在带有注释的JSF托管bean中使用它@ManagedBean.

CDI没有任何注释来注入EL表达式的评估结果,如as @ManagedProperty.该CDI的方法是使用一个"CDI生产者"与@Produces其中返回的具体类型,这是PropertyResourceBundle在的情况下,.properties基于文件的资源包.

只需将此类放在WAR中的某个位置:

@RequestScoped
public class BundleProducer {

    @Produces
    public PropertyResourceBundle getBundle() {
        FacesContext context = FacesContext.getCurrentInstance();
        return context.getApplication().evaluateExpressionGet(context, "#{msg}", PropertyResourceBundle.class);
    }

}

现在你可以按如下方式注入它:

@Inject
private PropertyResourceBundle bundle;