求教从文件mulu.txt中读取内容建树的例子，万分感谢！

感谢jFresH_MaN(The answer is ......) 指点，小弟刚学java不久，请问用XML又如何实现呢？谢谢！同时谢谢楼上的

我的意思是你把你的目录内容应该写在一个xml里面
因为xml本来就是一个树型结构的
然后使用dom,jdom或者sax来读取数据都是很简单的

当然如果你是初学者那就直接读txt也行
FileInputStream reader=new FileInputStream("mulu.txt");
具体的你查一下api啊，这个还是很基础的问题

提供一个XML树行菜单的例子:import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.JPanel;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2005
* Company: 
* @author not attributable
* @version 1.0
*/public class MyPanel1 extends JPanel {
 BorderLayout borderLayout1 = new BorderLayout(); public MyPanel1() {
 try {
 jbInit();
 }
 catch(Exception ex) {
 ex.printStackTrace();
 }
 }
 void jbInit() throws Exception { JFrame f = new JFrame("MyTree1...");
 Container contentPane = f.getContentPane();
 f.setSize(500, 500); String aa1;
 DefaultMutableTreeNode rootTreeNode; NewParseXML parse = new NewParseXML(); aa1 = "C:\\TreeNode.xml"; rootTreeNode = parse.load(new File(aa1)); JTree t = new JTree(rootTreeNode);
 t.putClientProperty("JTree.lineStyle", "Angled");
 JScrollPane scrollPane = new JScrollPane();
 scrollPane.setViewportView(t);
 contentPane.add(scrollPane); f.setVisible(true);
 f.addWindowListener(new WindowAdapter() {
 public void windowClosing(WindowEvent e) {
 System.exit(0);
 }
 }); this.setLayout(borderLayout1);
 } public static void main(String[] args) throws Exception{
 try {
 UIManager.setLookAndFeel(
 "com.sun.java.swing.plaf.windows.WindowsLookAndFeel"
 );
 }
 catch (Exception e1) {
 System.exit(0);
 } new MyPanel1();
 }
}class NewParseXML { public MyTreeNode load(File f) throws Exception {
 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 DocumentBuilder builder = factory.newDocumentBuilder();
 Document doc = builder.parse(f);
 MyTreeNode rootTreeNode = load(doc);
 return rootTreeNode;
 } public MyTreeNode load(Document doc) throws Exception {
 DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
 Element rootEle = doc.getDocumentElement();
 MyTreeNode rootTreeNode = new MyTreeNode(rootEle);
 load(rootTreeNode,rootEle);
 return rootTreeNode;
 } public void load(DefaultMutableTreeNode treeNode, Element ele) {
 NodeList nodeList = ele.getChildNodes();
 for (int i = 0; i < nodeList.getLength(); i++) {
 Node node = nodeList.item(i);
 MyTreeNode childTreeNode = new MyTreeNode(node);
 if (node.getNodeType() == Node.ELEMENT_NODE) {
 Element childEle = (Element) node;
 load(childTreeNode, childEle);
 treeNode.add(childTreeNode);
 }
 }
 } public class MyTreeNode extends DefaultMutableTreeNode { public MyTreeNode(Node XMLNode) {
 super(XMLNode);
 } public String toString() {
 Node node = (Node)this.getUserObject();
 if (node.getNodeType() == Node.ELEMENT_NODE) {
 Element ele = (Element) node;
 if (ele.getAttribute("Name") != null && !ele.getAttribute("Name").equals("")) {
 return ele.getAttribute("Name");
 }
 return node.getNodeName();
 }
 return node.toString();
 }
 } public NewParseXML() {
 }
}

建立TreeNode.xml文件,将文件放到C根目录下,内容如下:
<?xml version="1.0" encoding="gb2312" ?>
<Root>
<TreeNode Name="CSDN论坛">
<TreeNode Name="我的专家门诊">
<TreeNode Name="我的问题" Href="http://expert.csdn.net/Expert/member/MyForum.asp?typenum=1&frame=true&csdnstyle=" />
<TreeNode Name="我参与问题" Href="http://expert.csdn.net/Expert/member/MyForum.asp?typenum=2&frame=true&csdnstyle=" />
<TreeNode Name="我得分问题" Href="http://expert.csdn.net/Expert/member/MyForum.asp?typenum=3&frame=true&csdnstyle=" />
<TreeNode Name="我的专家分" Href="http://expert.csdn.net/Expert/member/MyExpertPoint.asp?frame=true&csdnstyle=" />
<TreeNode Name="我的收藏夹" Href="http://expert.csdn.net/MyFavorite/My_Favorite.asp?frame=true&csdnstyle=" />
<TreeNode Name="短消息" Href="http://expert.csdn.net/Message_Board/NewMessage.asp?typestate=0&frame=true&csdnstyle=" />
</TreeNode> <TreeNode Name="Web开发" Href="http://expert.csdn.net/Expert/ForumsList.asp?roomid=3&typenum=1&xmlsrc=&csdnstyle=">
<TreeNode Name="ASP" Href="http://expert.csdn.net/Expert/ForumList.asp?roomid=301&typenum=1&xmlsrc=&csdnstyle=" />
<TreeNode Name="JSP" Href="http://expert.csdn.net/Expert/ForumList.asp?roomid=5409&typenum=1&xmlsrc=&csdnstyle=" />
<TreeNode Name="Javascript" Href="http://expert.csdn.net/Expert/ForumList.asp?roomid=304&typenum=1&xmlsrc=&csdnstyle=" />
<TreeNode Name="XML/SOAP" Href="http://expert.csdn.net/Expert/ForumList.asp?roomid=306&typenum=1&xmlsrc=&csdnstyle=" />
</TreeNode> <TreeNode Name=".NET">
<TreeNode Name="C#" Href="http://expert.csdn.net/Expert/ForumList.asp?roomid=5201&typenum=1&xmlsrc=&csdnstyle=" />
<TreeNode Name="ASP.NET" Href="http://expert.csdn.net/Expert/ForumList.asp?roomid=5202&typenum=1&xmlsrc=&csdnstyle=" />
</TreeNode> <TreeNode Name="MS-SQL SERVER" Href="http://expert.csdn.net/Expert/ForumsList.asp?roomid=57&typenum=1&xmlsrc=&csdnstyle=" />
<TreeNode Name="软件工程/管理" Href="http://expert.csdn.net/Expert/ForumsList.asp?roomid=4&typenum=1&xmlsrc=&csdnstyle=" /> </TreeNode> <TreeNode Name="CSDN会员"> <TreeNode Name="个人信息设置">
<TreeNode Name="基本信息" Href="http://www.csdn.net/member/register.asp" />
<TreeNode Name="激活文件BBS" Href="http://www.csdn.net/member/activeFilebbs.asp" />
<TreeNode Name="邮递表选择" Href="http://www.csdn.net/member/maillist.asp" />
<TreeNode Name="修改email" Href="http://www.csdn.net/member.shtm" />
<TreeNode Name="修改密码" Href="http://www.csdn.net/member.shtm" />
</TreeNode> <TreeNode Name="我的文档">
<TreeNode Name="最新文档" Href="http://www.csdn.net/Develop/New_Article_List/1.shtm" />
<TreeNode Name="我的分类" Href="http://www.csdn.net/Develop/MyClass/List_MyClass.asp" />
<TreeNode Name="我的文档" Href="http://www.csdn.net/Develop/My_Article.asp" />
<TreeNode Name="发表文章" Href="http://www.csdn.net/Develop/Add_Article.asp" />
</TreeNode> </TreeNode> <TreeNode Name="名家专栏">
<TreeNode Name="侯捷" Href="http://jjhou.csdn.net/" />
<TreeNode Name="蔡学镛" Href="http://www.csdn.net/develop/author/cxy/" />
<TreeNode Name="周奕" Href="http://www.csdn.net/develop/author/ColumnAuthor/zhouyi/" />
<TreeNode Name="潘爱民" Href="http://www.csdn.net/develop/author/pam/" />
<TreeNode Name="蒋涛" Href="http://www.csdn.net/develop/author/jiangtao/" />
<TreeNode Name="王森" Href="http://www.csdn.net/develop/author/ColumnAuthor/moli/" />
<TreeNode Name="刘韧" Href="http://www.csdn.net/develop/author/ColumnAuthor/liurendonews/" />
<TreeNode Name="李学凌" Href="http://www.csdn.net/develop/author/ColumnAuthor/lxl/" />
<TreeNode Name="王国荣" Href="http://www.csdn.net/develop/author/ColumnAuthor/wgr/" />
<TreeNode Name="何致億" Href="http://www.csdn.net/develop/author/ColumnAuthor/hochihyi/" />
<TreeNode Name="柴晓路" Href="http://chaixiaolu.member.csdn.net/" />
<TreeNode Name="陈榕" Href="http://www.csdn.net/develop/author/columnauthor/chenrong/" />
<TreeNode Name="Joshua Kerievsky" Href="http://www.csdn.net/develop/author/ColumnAuthor/Kerievsky/" />
<TreeNode Name="李潘龙" Href="http://www.csdn.net/develop/author/netauthor/global_boy/" />
</TreeNode>
</Root>

谢谢大家，今结贴！感谢 bj_sztj给我的例子，但是我感觉还是难了一点因为里面有很多涉及到import org.w3c.dom.*;和XML方面的东西对我来说都是新知识，希望 bj_sztj能够再给一个比较简单的例子，我们好观摩观摩，谢谢了

调试易

求教从文件mulu.txt中读取内容建树的例子，万分感谢！

解决方案 »

求教 从文件mulu.txt中读取内容建树的例子，万分感谢！

解决方案 »

求教从文件mulu.txt中读取内容建树的例子，万分感谢！