如何在 JSF2 中将一个 @Named bean 注入到另一个 @Named bean 中？

Question

我有以下代码：

@Named
@RequestScoped
public class SearchBean{
    private String title;
    private String author;
    // .... getters and setter s
}

在 search.xhtml 中，我有：

<h:inputText value="#{searchBean.title}" />
<h:commandButton action=#{srchUI.action}"/>

我还有以下 ControllerBean：

@Named("srchUI")
@RequestScoped
public class SearchUIController {
    public String action(){
        // ...
    }
}

我想访问 action() 中的 SearchBean.title 方法...怎么做？如何将此 bean 注入到我的 UI 控制器中？

Answer 1

使用@Inject。

@Named("srchUI")
@RequestScoped
public class SearchUIController {

    @Inject
    private SearchBean searchBean;

    public String action(){

    }

}

Answer 2

public class SearchUIController {

    @ManagedProperty(value = "#{searchBean}")
    private SearchBean searchBean;

    // .. setters and getters for the searchBean
}

getter-setter 是必要的。

Answer 3

使用 @Inject 并在注入的 bean 上添加 Get 和 Set 方法！

@Named(value = "postMB")
@SessionScoped
public class PostMB{
   // inject comments on your posts
   @Inject
   private CommentMB commentMB;


   /* ADD GET and SET Methods to commentMB*/
   public CommentBM getCommentMB(){return this.commentMB;}
   public void setCommentMB(CommentMB newMB){this.commentMB = newMB;}
}


@Named(value="commentMB")
@RequestScoped
public class CommentMB{
  ....
}