wicket @SpringBean 无法创建 bean

发布于 2024-09-08 22:31:20 字数 456 浏览 6 评论 0原文

我有一个关于 Eclipse、Wicket、Spring、Hibernate 的项目。一切正常，除了：当我尝试

public class SortableContactDataProvider extends SortableDataProvider<User>
{
    @SpringBean
    private Service service;

    public Iterator<User> iterator(int first, int count)
    {
        //SortParam sp = getSort();
        return service.findAllUsers().subList(0, 15).iterator();
    }
...

服务变量为空？在任何其他地方，当我使用此构造“服务”时，它不为空并且运行良好。请帮我解决这个问题。

原文

I have a project on Eclipse, Wicket, Spring, Hibernate. Every thing works normaly except : when I try

public class SortableContactDataProvider extends SortableDataProvider<User>
{
    @SpringBean
    private Service service;

    public Iterator<User> iterator(int first, int count)
    {
        //SortParam sp = getSort();
        return service.findAllUsers().subList(0, 15).iterator();
    }
...

the service variable is null? In any another places when I use this constuction "service" is not null and working well. Please help me to solve this problem.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

愛放△進行李 2024-09-15 22:31:20

@SpringBean仅适用于组件的任何子类。

中执行以下操作，

您需要在构造函数Wicket 1.4

  InjectorHolder.getInjector().inject(this);

Wicket 1.5+

  org.apache.wicket.injection.Injector.get().inject(this);

请参阅“通用 IDataProvider 实现”@ http://stronglytypedblog.blogspot.com/2009/03/wicket-patterns-and-pitfalls-1.html

享受

@SpringBean works only in any Subclass of Component.

You need to do the following in your Constructor

Wicket 1.4

  InjectorHolder.getInjector().inject(this);

Wicket 1.5+

  org.apache.wicket.injection.Injector.get().inject(this);

See 'generic IDataProvider implementation' @ http://stronglytypedblog.blogspot.com/2009/03/wicket-patterns-and-pitfalls-1.html

Enjoy

回复收藏 0 原文

离不开的别离 2024-09-15 22:31:20

对于那些 Wicket/Spring 环境的新手来说，有更多的上下文 - 正如 bert 所指出的，@SpringBean 仅适用于组件的任何子类，因此您需要手动驱动注入。这是一个 2 步过程：

在您的类中驱动注入，如下所示：

public class SortableContactDataProvider extends SortableDataProvider<User>
{
    @SpringBean
    private Service service;

    public SortableContactDataProvider(){
        Injector.get().inject(this); // set up the injection
    }

    public Iterator<User> iterator(int first, int count)
    {
        return service.findAllUsers().subList(0, 15).iterator();
    }
}

并确保在 Wicket 应用程序中设置注入器 - 类似于：

public WicketApplication 

    @Override
    protected void init() {
        // make sure Spring injector is available and set up
        getComponentInstantiationListeners().add(new SpringComponentInjector(this));
    }
}

A bit more of context for those who are newbies to Wicket/Spring environment - as bert, pointed out, @SpringBean works only in any Subclass of Component so you'll need to drive the injection manually. This is a 2 step process:

Drive the injection in your class, something as:

public class SortableContactDataProvider extends SortableDataProvider<User>
{
    @SpringBean
    private Service service;

    public SortableContactDataProvider(){
        Injector.get().inject(this); // set up the injection
    }

    public Iterator<User> iterator(int first, int count)
    {
        return service.findAllUsers().subList(0, 15).iterator();
    }
}

And make sure the Injector is set up in Wicket application - something like:

public WicketApplication 

    @Override
    protected void init() {
        // make sure Spring injector is available and set up
        getComponentInstantiationListeners().add(new SpringComponentInjector(this));
    }
}

回复收藏 0 原文

~没有更多了~