Question

我正在尝试在我的页面上安装ImageResourceReference，但是ExternalLink已经多次挂载（每次我重新加载页面时，我都会得到一个新的附加链接（同一个）。例如，当我第一次启动服务器并加载页面时，只有一个ExternalLink，第二次，两个链接，第三次三个等等......

可能是什么原因？

这是我的代码： WebApp.java：

void init() {
.....
mountResource("/book/number/${number}/images/ray/${name}", new ImageResourceReference());
....
}

ImageResourcesPanel：

public class ImageResourcesPanel extends Panel {

    private static final long serialVersionUID = -8723530004274531683L;
    private static Logger logger = LoggerFactory.getLogger(ImageResourcesPanel.class
            .getName());

    /**
     * The image names for which dynamic images will be generated
     */
    private static List<String> IMAGE_NAMES = new ArrayList<String>(); 


    public ImageResourcesPanel(final String wicketId, final IModel<Device> model) {
        super(wicketId, model);

        String pathToImage = "images";
        IMAGE_NAMES.add(pathToImage);

        ListView<String> listView = new ListView<String>("list", IMAGE_NAMES) {

            private static final long serialVersionUID = 1L;

            @Override
            protected void populateItem(ListItem<String> item) {

                logger.debug("Executed!");

                ResourceReference imagesResourceReference = new ImageResourceReference();
                PageParameters imageParameters = new PageParameters();


                int number = model.getObject().getNumber();
                String imageName = item.getModelObject();
                String folder = model.getObject().getLinkToFolder();
                imageParameters.set("name", imageName);
                imageParameters.set("number", number);
                imageParameters.set("folder", folder);

                // generates nice looking url (the mounted one) to the current image
                CharSequence urlForWordAsImage = getRequestCycle().urlFor(imagesResourceReference, imageParameters);
                ExternalLink link = new ExternalLink("link", urlForWordAsImage.toString());
                link.setBody(Model.of(imageName));
                item.add(link);

            }
        };
        add(listView);
    }
}

Answer 1

知道了！

我必须在页面上安装图像后将ListView设为空。我在添加ListView-Item的链接后添加了一行代码：

`IMAGE_NAMES.remove(pathToImage);`

每次重新加载页面时都会多次挂载Wicket ImageResourceReference

1 个答案: