无限级 jtree的例子(急用)解决方案

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.tree.*; public class TreeEditTest { public static void main(String[] args) { JFrame frame = new TreeEditFrame(); frame.show(); } } class TreeEditFrame extends JFrame implements ActionListener { public TreeEditFrame() { setTitle("TreeEditTest"); setSize(300, 200); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); // construct tree TreeNode root = makeSampleTree(); model = new DefaultTreeModel(root); tree = new JTree(model); DefaultTreeCellRenderer renderer=new DefaultTreeCellRenderer(); renderer.setLeafIcon(new ImageIcon("1.gif")); renderer.setClosedIcon(new ImageIcon("2.gif")); renderer.setOpenIcon(new ImageIcon("3.gif")); //renderer.setBackgroundNonSelectionColor(Color.BLUE); //renderer.setBackgroundSelectionColor(Color.RED); renderer.setBorderSelectionColor(Color.RED); tree.setCellRenderer(renderer); // add scroll pane with tree to content pane Container contentPane = getContentPane(); JScrollPane scrollPane = new JScrollPane(tree); contentPane.add(scrollPane, "Center"); // make button panel JPanel panel = new JPanel(); addSiblingButton = new JButton("Add Sibling"); addSiblingButton.addActionListener(this); panel.add(addSiblingButton); addChildButton = new JButton("Add Child"); addChildButton.addActionListener(this); panel.add(addChildButton); deleteButton = new JButton("Delete"); deleteButton.addActionListener(this); panel.add(deleteButton); contentPane.add(panel, "South"); } public TreeNode makeSampleTree() { DefaultMutableTreeNode root = new DefaultMutableTreeNode("World"); DefaultMutableTreeNode country = new DefaultMutableTreeNode("USA"); root.add(country); DefaultMutableTreeNode state = new DefaultMutableTreeNode("California"); country.add(state); DefaultMutableTreeNode city = new DefaultMutableTreeNode("San Jose"); state.add(city); city = new DefaultMutableTreeNode("Cupertino"); state.add(city); state = new DefaultMutableTreeNode("Michigan"); country.add(state); city = new DefaultMutableTreeNode("Ann Arbor"); state.add(city); country = new DefaultMutableTreeNode("Germany"); root.add(country); state = new DefaultMutableTreeNode("Schleswig-Holstein"); country.add(state); city = new DefaultMutableTreeNode("Kiel"); state.add(city); return root; } public void actionPerformed(ActionEvent event) { DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree .getLastSelectedPathComponent(); if (selectedNode == null) return; if (event.getSource().equals(deleteButton)) { if (selectedNode.getParent() != null) model.removeNodeFromParent(selectedNode); // model.removeFromParent(selectedNode); return; } // add new node as sibling or child DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("New"); if (event.getSource().equals(addSiblingButton)) { DefaultMutableTreeNode parent = (DefaultMutableTreeNode) selectedNode .getParent(); if (parent != null) { int selectedIndex = parent.getIndex(selectedNode); model.insertNodeInto(newNode, parent, selectedIndex + 1); } } else if (event.getSource().equals(addChildButton)) { model.insertNodeInto(newNode, selectedNode, selectedNode .getChildCount()); } // now display new node TreeNode[] nodes = model.getPathToRoot(newNode); TreePath path = new TreePath(nodes); tree.scrollPathToVisible(path); } private DefaultTreeModel model; private JTree tree; private JButton addSiblingButton; private JButton addChildButton; private JButton deleteButton; private JButton editButton; }