JTree在应用程序启动时添加节点

Question

我想使用文件浏览器创建文本编辑器，所以当我启动应用程序时，我想在程序中在JTree上添加节点，以便它向我显示所有文件和文件夹，例如在“我的文档”文件夹中，并允许我访问这些文件和文件夹（尤其是文件夹）。我试图从这个例子中弄清楚安德鲁·汤普森是如何做到的，
但是我失败了。我使用此示例为“我的文档”中的所有文件和文件夹创建了节点
。但这就是全部，当单击表示文件夹的节点之一时，我无法弄清楚如何为其他文件和文件夹生成节点。

这是我到目前为止所做的：

import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTabbedPane;
import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;


public class MyTextEditor extends JFrame{

    JTree tree;
    JTabbedPane tabbedPane = new JTabbedPane();
    File myDocumentsFolder = new File("C:/Documents and Settings/User/My Documents");
    File[] listOfFiles = myDocumentsFolder.listFiles();
    String dirTitle = myDocumentsFolder.getName();
    DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode(dirTitle);
    DefaultTreeModel treeModel = new DefaultTreeModel(rootNode);

    public MyTextEditor() {

        tree = new JTree(treeModel);
        tree.setEditable(false);
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        tree.setShowsRootHandles(true);

        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,new JScrollPane(tree),tabbedPane);
        add(splitPane);

        tree.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e){
                for (int i = 0; i < listOfFiles.length; i++) {
                    String nameOfFile = listOfFiles[i].getName();
                    rootNode.add(new DefaultMutableTreeNode(nameOfFile));
                }
            }
        });

    }

    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (UnsupportedLookAndFeelException e) {
            e.printStackTrace();
        }

        SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                MyTextEditor mte = new MyTextEditor();
                mte.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                mte.setPreferredSize(new Dimension(800,600));
                mte.pack();
                mte.setLocationByPlatform(true);
                mte.setVisible(true);
            }
        });
    }

}

有人可以告诉我如何为特定文件夹的所有文件和文件夹生成节点。提前致谢。

Answer 1

我将此FileTreeModel用于TreeModel，Outline视图和user.dir起始目录。

TreeModel treeModel = new FileTreeModel(
    new File(System.getProperty("user.dir")));
OutlineModel outlineModel = DefaultOutlineModel.createOutlineModel(
    treeModel, new FileRowModel(), true, "User Directory");