import java.util.Enumeration;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

class TreeFrame implements TreeSelectionListener {
    private JTree example = null;
    public TreeFrame() {
        DefaultMutableTreeNode root = new DefaultMutableTreeNode(" root ", true);
        DefaultMutableTreeNode a = new DefaultMutableTreeNode(" A ");
        root.add(a);
        a.add(new DefaultMutableTreeNode(" AA "));
        a.add(new DefaultMutableTreeNode(" AB "));
        DefaultMutableTreeNode b = new DefaultMutableTreeNode(" B ");
        root.add(b);
        b.add(new DefaultMutableTreeNode(" BA "));
        b.add(new DefaultMutableTreeNode(" BB "));
        DefaultMutableTreeNode c = new DefaultMutableTreeNode(" C ");
        root.add(c);
        c.add(new DefaultMutableTreeNode(" AA "));
        c.add(new DefaultMutableTreeNode(" AB "));
        example = new JTree(root);
        example.addTreeSelectionListener(this);
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
        panel.add(new JScrollPane(example));
        JFrame frame = new JFrame(" JTreeDemo ");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(panel);
        frame.setSize(250, 400);
        frame.setVisible(true);
    }
    public void valueChanged(TreeSelectionEvent e) {
        example.expandPath(e.getPath());
        DefaultMutableTreeNode dm = (DefaultMutableTreeNode) e.getPath()
                .getLastPathComponent();
        for (Enumeration em = dm.children(); em.hasMoreElements();) {
            TreeNode n = (TreeNode) em.nextElement();
            TreePath visiblePath = new TreePath(((DefaultTreeModel) example
                    .getModel()).getPathToRoot(n));
            example.addSelectionPath(visiblePath);
        }
    }
}
public class TreeTest {
    public static void main(String[] args) {
        new TreeFrame();
    }
}

------解决方案--------------------
不太懂这个，期待高手尽快出现，希望楼主早点解决难题。
帮顶一下

------解决方案--------------------
不懂 绑定 顺便借点分

------解决方案--------------------

嘿嘿  在5楼那哥们基础上改了一下 不知道是楼主的要的不

Java code


    public void valueChanged(TreeSelectionEvent e) {

        DefaultMutableTreeNode dm = (DefaultMutableTreeNode) e.getPath().getLastPathComponent();
        DefaultMutableTreeNode root = (DefaultMutableTreeNode) example.getModel().getRoot();

        for (Enumeration em = dm.children(); em.hasMoreElements();) {

            TreeNode n = (TreeNode) em.nextElement();

            for (Enumeration rootem = root.breadthFirstEnumeration(); rootem.hasMoreElements();) {

                TreeNode rootn = (TreeNode) rootem.nextElement();

                if (String.valueOf(n).equals(String.valueOf(rootn))) {
                    TreePath path = new TreePath(((DefaultTreeModel) example.getModel()).getPathToRoot(rootn));
                    example.addSelectionPath(path);
                }

            }
            TreePath visiblePath = new TreePath(((DefaultTreeModel) example.getModel()).getPathToRoot(n));
            example.addSelectionPath(visiblePath);

        }
    }