怎么將樹輸出到XML文件代碼？

                     整理了一段將樹輸入到xml文件的代碼，有興趣大家看一下
/**
     * put out the tree information to XML file <br>
     * @return if wrong return 0,else return 1
     * @throws N/A
     * @author tianrenliang
     */
    public int saveTreeToXmlFile(ViewMsgTree viewMsgTree, String strName)
    {
        if(viewMsgTree==null)
        {
            return 0;
        }
        ViewMsgTreeItem rootItem = viewMsgTree.getRootItem();
        ITreeNode treenode = rootItem.getRefNode();//get the root node
//        strFileName =  ViewTreeList.getInstance().getCurrentSelPduName();
        /*create a save dialog,create a xml file by using this dialog : Start*/
        Shell sMain = MainWindow.getInstance().openMainWindow();
        if (null == sMain) 
        {
            return 0;
        }
        FileDialog fileDlg = new FileDialog(sMain, SWT.SAVE);
        if (null != strName)
        {
            fileDlg.setFileName(strName);
        }
        fileDlg.setFilterExtensions(new String[] { "*.xml"});
        //set first time dialog save path
        String def = getDefaultPath();

//結束