用java 生成一个树形菜单 package com.csii; import java.awt.GridLayout; import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTree; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.event.TreeSelectionEvent; import javax.swing.event.TreeSelectionListener; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeSelectionModel; public class TreeDemo1 extends JFrame implements TreeSelectionListener { private static final long serialVersionUID = 1L; private JPanel jContentPane = null; private JTree jTree = null; private JEditorPane jEditorPane = null; private JScrollPane jScrollPane = null; public JScrollPane getjScrollPane() { if(jScrollPane==null){ jScrollPane = new JScrollPane(); jScrollPane.setViewportView(getJTree()); } return jScrollPane; } DefaultMutableTreeNode top = null; // @jve:decl-index=0: /** * This is the default constructor */ public TreeDemo1() { super(); initialize(); } /** * This method initializes this * * @return void */ private void initialize() { this.setSize(438, 309); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setContentPane(getJContentPane()); this.setTitle("JFrame"); } /** * This method initializes jContentPane * * @return javax.swing.JPanel */ private JPanel getJContentPane() { if (jContentPane == null) { GridLayout gridLayout = new GridLayout(); gridLayout.setRows(1); gridLayout.setColumns(2); jContentPane = new JPanel(); jContentPane.setLayout(gridLayout); jContentPane.add(getjScrollPane(), null); jContentPane.add(getJEditorPane(), null); } return jContentPane; } /** * This method initializes jTree * * @return javax.swing.JTree */ private JTree getJTree() { if (jTree == null) { top = new DefaultMutableTreeNode("黄山"); createNodes(top); jTree = new JTree(top); jTree.getSelectionModel().setSelectionMode( TreeSelectionModel.SINGLE_TREE_SELECTION); jTree.addTreeSelectionListener(this); } return jTree; } private void createNodes(DefaultMutableTreeNode top) { DefaultMutableTreeNode jingdian = null, jiaotong = null, zhusu = null, binguan = null, luying = null, jiesu = null; jingdian = new DefaultMutableTreeNode("景点"); jingdian.add(new DefaultMutableTreeNode("景点1")); jingdian.add(new DefaultMutableTreeNode("景点2")); jiaotong = new DefaultMutableTreeNode("交通"); jiaotong.add(new DefaultMutableTreeNode("路线1")); jiaotong.add(new DefaultMutableTreeNode("路线2")); jiaotong.add(new DefaultMutableTreeNode("路线3")); zhusu = new DefaultMutableTreeNode("住宿"); zhusu.add(new DefaultMutableTreeNode("A住宿")); zhusu.add(new DefaultMutableTreeNode("B住宿")); zhusu.add(new DefaultMutableTreeNode("C住宿")); binguan = new DefaultMutableTreeNode("宾馆"); binguan.add(new DefaultMutableTreeNode("X宾馆")); binguan.add(new DefaultMutableTreeNode("Y宾馆")); binguan.add(new DefaultMutableTreeNode("Z宾馆")); binguan.add(new DefaultMutableTreeNode("XYZ宾馆")); luying = new DefaultMutableTreeNode("露营"); luying.add(new DefaultMutableTreeNode("方式1")); luying.add(new DefaultMutableTreeNode("方式2")); jiesu = new DefaultMutableTreeNode("借宿"); jiesu.add(new DefaultMutableTreeNode("借宿1")); jiesu.add(new DefaultMutableTreeNode("借宿2")); jiesu.add(new DefaultMutableTreeNode("借宿3")); top.add(jingdian); top.add(jiaotong); top.add(zhusu); top.add(binguan); top.add(luying); top.add(jiesu); } /** * This method initializes jEditorPane * * @return javax.swing.JEditorPane */ private JEditorPane getJEditorPane() { if (jEditorPane == null) { jEditorPane = new JEditorPane(); } return jEditorPane; } @Override public void valueChanged(TreeSelectionEvent e) { DefaultMutableTreeNode node = (DefaultMutableTreeNode) jTree .getLastSelectedPathComponent(); if (node == null) // Nothing is selected. return; if(node.isRoot()){ jEditorPane.setText("黄山的简介"); } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); }catch(Exception e){ e.printStackTrace(); } new TreeDemo1().setVisible(true); } }); } }