Ajax没有在wicket中实现listview

Question

我想创建wicket页面,其中显示来自数据库的数据表,在此表下,有一个表单,它将另一个对象创建到数据库中.当我保存对象时,页面不刷新,所以在表中我看不到新行.如果我理解正确,要解决这个问题,我必须使用ajax.我找到了指南(https://cwiki.apache.org/confluence/display/WICKET/How+to+repaint+a+ListView+via+Ajax)并在我的项目中创建了类似的东西,但它不起作用我可以找不到它不起作用的原因.我发现另一个人有问题,他们试图只实现行/面板,但这不是我的情况.我甚至没有任何例外,只是它什么也没做.你能给我一个建议吗？

.java文件

public class ListPanel extends Panel {
    private static final long serialVersionUID = 6953172817971228490L;

    @SpringBean
    RezervaceDao rezervaceDao;

    public ListPanel(String id) {
        super(id);

        List<Rezervace> rezervace = rezervaceDao.getAllRezervace();
        ListView listview = new ListView("rezervaceList", rezervace) {
            private static final long serialVersionUID = 3659733406689720345L;

            protected void populateItem(ListItem item) {
                Rezervace r = (Rezervace) item.getModelObject();
                item.add(new Label("casRezervace", r.getCasRezervace()));
                item.add(new Label("jmeno", r.getJmeno()));
                item.add(new Label("adresa", r.getAdresa()));
                item.add(new Label("telefon", r.getTelefon()));
            }
        };
        listview.setReuseItems(true);

        // encapsulate the ListView in a WebMarkupContainer in order for it to
        // update
        WebMarkupContainer listContainer = new WebMarkupContainer("obal");
        // generate a markup-id so the contents can be updated through an AJAX
        // call
        listContainer.setOutputMarkupId(true);
        listContainer
                .add(new AjaxSelfUpdatingTimerBehavior(Duration.seconds(3)));
        // add the list view to the container
        listContainer.add(listview);
        // finally add the container to the page
        add(listContainer);

    }
}

.html文件

<wicket:panel>
    <div wicket:id="obal">
        <table>
            <tr>
                <th>?as návšt?vy</th>
                <th>Jméno a P?íjmení</th>
                <th>Adresa</th>
                <th>Kontaktní telefon</th>
            </tr>
            <tr wicket:id="rezervaceList">
                <td><span wicket:id="casRezervace"></span></td>
                <td><span wicket:id="jmeno"></span></td>
                <td><span wicket:id="adresa"></span></td>
                <td><span wicket:id="telefon"></span></td>
            </tr>
        </table>
    </div>
</wicket:panel>

Answer 1

问题在于:

List<Rezervace> rezervace = rezervaceDao.getAllRezervace();
ListView listview = new ListView("rezervaceList", rezervace) 

列表视图使用静态列表初始化自身.它应该在每次刷新时向DB询问新数据.

阅读https://cwiki.apache.org/confluence/display/WICKET/Working+with+Wicket+models#WorkingwithWicketmodels-DynamicModels关于静态与动态模型.