将树导出为ex​​cel

Question

我正在尝试将树导出到Excel工作表，我遇到了问题。

起初我使用的是RichTreeTable，我可以使用我的导出方法轻松导出数据。

 public static void exportDataDrillDownIndiComercial(FacesContext facesContext, OutputStream outputStream, RichTreeTable tree) throws IOException {

        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));

        CollectionModel treeModel = (CollectionModel) tree.getValue();

        JUCtrlHierBinding treeBinding = (JUCtrlHierBinding) treeModel.getWrappedData();
        List<JUCtrlHierNodeBinding> treeList = treeBinding.getChildren();

然而，他们已将其更改为ChildPropertyTreeModel， 现在我有：

public static void exportDataDrillDownIndiComercial(FacesContext facesContext, OutputStream outputStream, ChildPropertyTreeModel tree) throws IOException {
    BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8")); 
    CollectionModel treeModel = (CollectionModel) tree;
    JUCtrlHierBinding treeBinding = (JUCtrlHierBinding) tree.getWrappedData(); //getWrappedData on tree or treeModel gives ClassCastException
    List<JUCtrlHierNodeBinding> treeList = treeBinding.getChildren();

每当我尝试getWrappedData()时，我都会遇到ClassCastException，而我尝试过的任何其他get都与JUCtrlHierBinding不兼容。 我该怎么办？

java.util.ArrayList cannot be cast to oracle.jbo.uicli.binding.JUCtrlHierBinding