CDI @Produces具有多个属性文件

本文介绍了CDI @Produces具有多个属性文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

感谢这篇文章， https://stackoverflow.com/a/28047512/1227941 我现在正在使用CDI使味精在我的@Named bean中可用，例如:

Thanks to this post, https://stackoverflow.com/a/28047512/1227941 I am now using CDI to make msg available in my @Named beans like this:

@RequestScoped
public class BundleProducer {

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

使用注射方式:

@Inject
private PropertyResourceBundle bundle;

问题:如果我有更多属性文件:ui.properties，admin.properties ...?

The question: What should I do if I have more property files: ui.properties, admin.properties ...?

推荐答案

我只是使用分类器注释来选择要注入的包.从我的一个小项目中偷来的:

I'd simply use a classifier annotation to choose which bundle to inject. Ripped from a little project of mine:

注释:

@Qualifier
@Target({ ElementType.TYPE, ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
public @interface Bundle {
   @Nonbinding
   public String value() default "";
}

生产者方法(根据您的上下文进行适当调整):

The producer method (adapt as necessary for your context):

@Produces @Bundle ResourceBundle loadBundle(InjectionPoint ip) {
     String bundleName = ip.getAnnotated().getAnnotation(Bundle.class).value();
     ResourceBundle res = ResourceBundle.getBundle(bundleName);
     return res;
}

还有注射:

@Inject @Bundle("ui")
private ResourceBundle uiResources;

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