Question

我正在将应用程序从较旧版本的wicket迁移到wicket 8.有些页面工作正常（简单页面，如登录）。这些页面不使用扩展机制。当我访问具有该机制的页面时，它不起作用。我不知道这是不是一个错误，但我尝试了一切，无法找到解决方案。我正在使用wicket 8.0.0-M5 （我的kwnow不是一个稳定版本）。有人有同样的问题吗？这是我的代码：

WerklijstPageXXX.html

<html xmlns:wicket>
 <body>
    <wicket:extend>
        <div wicket:id="panelXXX"></div>
    </wicket:extend>
</body>

WerklijstPanelXXX.html

<wicket:head xmlns:wicket>
</wicket:head>

<wicket:panel xmlns:wicket>
    <div wicket:id="filter">
         <div wicket:id="label"></div>
    </div>
</wicket:panel>

WerklijstPageXXX.java

public class WerklijstPageXXX extends BasePage {

private WerklijstPanelXXX werklijstPanel;

public WerklijstPageXXX() {
    werklijstPanel = new WerklijstPanelXXX("panelXXX"){};
    add(werklijstPanel);
}

@Override
public Panel getContextPanel(String id)
{
    return werklijstPanel.getWerklijstFilterPanel();
}

WerklijstPanelXXX.java

public abstract class WerklijstPanelXXX extends Panel {
private static final Logger LOG = LoggerFactory
        .getLogger(WerklijstPanelXXX.class);

private Panel filterPanel;

public WerklijstPanelXXX(String id) {
    super(id);
    WebMarkupContainer upperPanel = new WebMarkupContainer("filter");
    filterPanel = new Panel("filterPanel") {

    };

    add(upperPanel);

    upperPanel.add(new Label("label"));


}

public Panel getWerklijstFilterPanel() {
    return filterPanel;
}

编辑： BasePage.html（部分内容）

<div id="body" class="body">
                <div id="aside" class="aside">
                    <div wicket:id="contextPanel"></div>
                </div>
                <div id="content" class="content">
                    <div class="padding">
                        <wicket:child></wicket:child>
                    </div>
                </div>
            </div>

BasePage.java

    @Override
protected void onInitialize() {
    super.onInitialize();
    add(getContextPanel("contextPanel"));
    addTabMenu();
    addMenu();
    addPatientBar();
}

错误：

根本原因：

org.apache.wicket.WicketRuntimeException：下面的组件无法呈现。可能的原因可能是： 1）您在代码中添加了一个组件但忘记在标记中引用它（因此组件永远不会被渲染）， 2）如果您的组件已添加到父容器中，请确保子容器的标记包含它们。

[WerklijstPanelXXX [Component id = panelXXX，page = nl.philips.raris.web.werklijst.WerklijstPageXXX，path = panelXXX，type = nl.philips.raris.web.werklijst.WerklijstPanelXXX，isVisible = true，isVersioned = true ]，children = [WebMarkupContainer [Component id = filter]]]
[WebMarkupContainer [Component id = filter，page = nl.philips.raris.web.werklijst.WerklijstPageXXX，path = panelXXX：filter，type = org.apache.wicket.markup.html.WebMarkupContainer，isVisible = true，isVersioned = true]，children = [Component id = label]]
[Component id = label，page = nl.philips.raris.web.werklijst.WerklijstPageXXX,path = panelXXX：filter：label，type = org.apache.wicket.markup.html.basic.Label，isVisible = true ，isVersioned = true]
[Panel [Component id = filterPanel，page = nl.philips.raris.web.werklijst.WerklijstPageXXX,path = filterPanel，type = org.apache.wicket.markup.html.panel.Panel,isVisible = true，isVersioned = true]]

at org.apache.wicket.Page.checkRendering（Page.java:662）在org.apache.wicket.Page.onAfterRender（Page.java:805）在org.apache.wicket.markup.html.WebPage.onAfterRender（WebPage.java:209）在org.apache.wicket.Component.afterRender（Component.java:919）在org.apache.wicket.Component.render（Component.java:2335）在org.apache.wicket.Page.renderPage（Page.java:987）在org.apache.wicket.request.handler.render.WebPageRenderer.renderPage（WebPageRenderer.java:124）在org.apache.wicket.request.handler.render.WebPageRenderer.respond（WebPageRenderer.java:236）在org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond（RenderPageRequestHandler.java:175） at org.apache.wicket.request.cycle.RequestCycle $ HandlerExecutor.respond（RequestCycle.java:912）在org.apache.wicket.request.RequestHandlerExecutor.execute（RequestHandlerExecutor.java:65）在org.apache.wicket.request.cycle.RequestCycle.execute（RequestCycle.java:283）在org.apache.wicket.request.cycle.RequestCycle.processRequest（RequestCycle.java:253） at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach（RequestCycle.java:221）在org.apache.wicket.protocol.http.WicketFilter.processRequestCycle（WicketFilter.java:262）在org.apache.wicket.protocol.http.WicketFilter.processRequest（WicketFilter.java:204）在org.apache.wicket.protocol.http.WicketServlet.doGet（WicketServlet.java:137）在javax.servlet.http.HttpServlet.service（HttpServlet.java:687）在javax.servlet.http.HttpServlet.service（HttpServlet.java:790）在org.eclipse.jetty.servlet.ServletHolder.handle（ServletHolder.java:808）在org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1669）在org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain（AbstractShiroFilter.java:449）在org.apache.shiro.web.servlet.AbstractShiroFilter $ 1.call（AbstractShiroFilter.java:365）在org.apache.shiro.subject.support.SubjectCallable.doCall（SubjectCallable.java:90）在org.apache.shiro.subject.support.SubjectCallable.call（SubjectCallable.java:83）在org.apache.shiro.subject.support.DelegatingSubject.execute（DelegatingSubject.java:387）在org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal（AbstractShiroFilter.java:362）在org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:125）在org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:346）在org.springframework.web.filter.DelegatingFilterProxy.doFilter（DelegatingFilterProxy.java:262）在org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1652）在org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal（OpenSessionInViewFilter.java:151）在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）在org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1652）

Answer 1

Java和HTML组件树应匹配。

您的HTML状态为：<div wicket:id="*contextPanel*"></div>，但您的Java代码会返回ID为filterPanel的Panel。

public WerklijstPageXXX() {
    werklijstPanel = new WerklijstPanelXXX("panelXXX"){};
    add(werklijstPanel);
}

@Override
public Panel getContextPanel(String id)  // HERE id is ignored
{
    return werklijstPanel.getWerklijstFilterPanel(); // This returns a panel with id `filterPanel`
}

Wicket 8 - 扩展机制不起作用

1 个答案: