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我有一些带有父对象的 DAO 对象 - BaseDAO。我在项目的 2 个模块之间共享它 - 客户端和服务器。在某个时候，我碰到了 JFoenix 并决定使用，但后来我遇到了一个问题。要使用 JFXTreeTableView，您需要创建一个从 RecursiveTreeItem 继承的类，但由于我已经有了 DAO 类，所以我决定为我的 DAO 创建包装器，如下所示：

    class AnnouncerWrapped extends BaseWrapped<AnnouncerWrapped> {
    StringProperty education;

    public AnnouncerWrapped(Announcer announcer) {
        super(announcer);
        this.education = new SimpleStringProperty(announcer.getEducation());
    }

    public static ObservableList<AnnouncerWrapped> wrap(ArrayList<? extends BaseDAO> announcers) {
        List<AnnouncerWrapped> wrappedAnnouncers = new ArrayList<>();
        for (BaseDAO announcer : announcers) {
            AnnouncerWrapped wrappedAnnouncer = new AnnouncerWrapped((Announcer) announcer);
            wrappedAnnouncers.add(wrappedAnnouncer);
        }
        return FXCollections.observableArrayList(wrappedAnnouncers);
    }
}

class BaseWrapped<T> extends RecursiveTreeObject<T> {
    IntegerProperty id;
    StringProperty name;

    public BaseWrapped(BaseDAO baseDAO) {
        this.id = new SimpleIntegerProperty(baseDAO.getId());
        this.name = new SimpleStringProperty(baseDAO.getName());
    }
}

所以基本上我想出的想法是创建一个父类作为 BaseWrapped 扩展 RecursiveTreeObject，然后从它继承其余的 DAO 类以将数据包装到 RecursiveTreeObject 中。

问题是现在我无法编写代码来处理所有 BaseWrapped 子类。我尝试了很多不同的方法，唯一对我有用的是创建表和列：

@FXML
private JFXTreeTableView<AnnouncerWrapped> mTreeTable;

JFXTreeTableColumn<AnnouncerWrapped, Integer> idColumn;

并像这样绑定数据：

ObservableList<AnnouncerWrapped> announcers = null;
        try {
            announcers = FXCollections.observableArrayList(AnnouncerWrapped.wrap(request.getData()));
        } catch (ClassNotFoundException | IllegalAccessException | InstantiationException e) {
            e.printStackTrace();
        }
        // build tree
        final TreeItem<AnnouncerWrapped> root = new RecursiveTreeItem<>(announcers, RecursiveTreeObject::getChildren);

        mTreeTable.setRoot(root);
        mTreeTable.setShowRoot(false);
        mTreeTable.setEditable(false);
        mTreeTable.getColumns().setAll(idColumn);

        JFXTextField filterField = new JFXTextField();
        Label size = new Label();
        size.textProperty().

                bind(Bindings.createStringBinding(() -> mTreeTable.getCurrentItemsCount() + "",
                        mTreeTable.currentItemsCountProperty()));

但我想让代码通用，即编写类似private JFXTreeTableView<? extends BaseWrapped> mTreeTable;通过一段代码处理所有 BaseWrapped 子类的东西。

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