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java树形菜单系统代码 java树状结构菜单无限级别

IT技术节点

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);

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