Java记事本程序源代码

import java.awt.CheckboxMenuItem; import java.awt.Color; import java.awt.Container; import java.awt.FileDialog; import java.awt.FlowLayout; import java.awt.Font; import java.awt.GraphicsEnvironment; import java.awt.Menu; import java.awt.MenuBar; import java.awt.MenuItem; import java.awt.MenuShortcut; import java.awt.TextArea; import java.awt.Toolkit; import java.awt.Window; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.StringSelection; import java.awt.datatransfer.Transferable; import java.awt.datatransfer.UnsupportedFlavorException; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JButton; import javax.swing.JColorChooser; import javax.swing.JComboBox; import javax.swing.JDialog; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField; public class notebook { // 记事本的具体实现类 private static final long serialVersionUID = 1L; private TextArea content; private String filePath = "";//先让路径为空 Color color=Color.red; Toolkit toolKit = Toolkit.getDefaultToolkit(); Clipboard clipboard = toolKit.getSystemClipboard(); public notebook(){ //创建一个JFrame对象；并设置相关属性 final JFrame jf = new JFrame("我的记事本"); jf.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); jf.setBounds(100,100,500,500); jf.setResizable(true); jf.setVisible(true); //创建菜单栏 MenuBar menu = new MenuBar(); jf.setMenuBar(menu); //创建并添加文本框 content = new TextArea("",50,50,TextArea.SCROLLBARS_VERTICAL_ONLY); jf.add(content); content.setVisible(true); content.requestFocusInWindow(); //菜单栏添加内容 Menu filemenu = new Menu("文件（F）"); Menu editmenu = new Menu("编辑（E）"); Menu formatmenu = new Menu("（O）"); Menu viewmenu = new Menu("查看（V）"); Menu helpmenu = new Menu("帮助（H）"); menu.add(filemenu); menu.add(editmenu); menu.add(formatmenu); menu.add(viewmenu); menu.add(helpmenu); //创建文件菜单上的各个菜单项并添加到菜单上 MenuItem newitem = new MenuItem("新建（N）"); newitem.setShortcut(new MenuShortcut(KeyEvent.VK_N,false)); filemenu.add(newitem); MenuItem openitem = new MenuItem("打开（O）"); openitem.setShortcut(new MenuShortcut(KeyEvent.VK_O,false)); filemenu.add(openitem); MenuItem saveitem = new MenuItem("保存（S）"); saveitem.setShortcut(new MenuShortcut(KeyEvent.VK_S,false)); filemenu.add(saveitem); MenuItem saveasitem = new MenuItem("另存为（A）"); saveasitem.setShortcut(new MenuShortcut(KeyEvent.VK_A,false)); filemenu.add(saveasitem); MenuItem setitem = new MenuItem("页面设置（U）"); setitem.setShortcut(new MenuShortcut(KeyEvent.VK_U,false)); filemenu.add(setitem); setitem.setEnabled(false); MenuItem printitem = new MenuItem("打印（P）"); printitem.setShortcut(new MenuShortcut(KeyEvent.VK_P,false)); filemenu.add(printitem); printitem.setEnabled(false); filemenu.addSeparator(); MenuItem exititem = new MenuItem("退出（X）"); exititem.setShortcut(new MenuShortcut(KeyEvent.VK_X,false)); filemenu.add(exititem); //添加监听器来实现文件菜单上的各个菜单项的功能 //新建菜单项的功能实现 newitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { String con = content.getText(); if(!con.equals("")){//文本域里文本不为空 int result = JOptionPane.showConfirmDialog( null, ("是否要保存？"),("保存文件..."),JOptionPane.YES_NO_CANCEL_OPTION); if(result == JOptionPane.NO_OPTION){//不保存 content.setText(""); } else if(result == JOptionPane.CANCEL_OPTION){//取消新建 } else if(result == JOptionPane.YES_OPTION)//选择保存 { JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名 int bcf = jfc.showSaveDialog(jf); if(bcf == JFileChooser.APPROVE_OPTION){ try { //保存文件 BufferedWriter bfw = new BufferedWriter( new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt"))); filePath = jfc.getSelectedFile().getAbsolutePath()+".txt";//获取文件保存的路径 bfw.write(con);//向文件写出数据 bfw.flush(); bfw.close();//关闭输出流 } catch (IOException ex) { Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex); } new notebook();//新建文本文件 } } } } }); //打开菜单项的功能实现 openitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { // JFileChooser jfile = new JFileChooser(); // FileNameExtensionFilter filter = new FileNameExtensionFilter("*.txt","txt"); // jfile.setFileFilter(filter); // jfile.setVisible(true); // int returnval = jfile.showOpenDialog(jfile); // filePath = jfile.getDialogTitle()+jfile.getSelectedFile().getName(); // System.out.println(jfile.getSelectedFile()); FileDialog dialog = new FileDialog(new JFrame(),"打开....",FileDialog.LOAD); dialog.setVisible(true); filePath = dialog.getDirectory() + dialog.getFile(); System.out.println(filePath); File file = new File(filePath); BufferedReader br = null; StringBuilder sb = new StringBuilder(); try{ br = new BufferedReader (new FileReader(file)); String str = null; while ((str = br.readLine()) != null){ sb.append(str).append("\n"); } content.setText(sb.toString()); } catch(FileNotFoundException e1){ e1.printStackTrace(); } catch(IOException e1){ e1.printStackTrace(); } finally{ if(br != null){ try{ br.close(); } catch(IOException e1){ e1.printStackTrace(); } } } } }); //保存菜单项的功能实现 saveitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { // FileDialog dialog = new FileDialog(new JFrame(),"保存....",FileDialog.SAVE); // dialog.setVisible(true); // filePath = dialog.getDirectory() + dialog.getFile(); // File file = new File(filePath); // BufferedWriter bw = null; // try{ // bw = new BufferedWriter(new FileWriter(file)); // bw.write(content.getText()); // } // catch(FileNotFoundException e1){ // e1.printStackTrace(); // } // catch(IOException e1){ // e1.printStackTrace(); // } // finally{ // if(bw != null){ // try{ // bw.close(); // } // catch(IOException e1){ // e1.printStackTrace(); // } // } // } FileDialog dialog = new FileDialog(new JFrame(),"保存....",FileDialog.SAVE); dialog.setVisible(true); filePath = dialog.getDirectory() + dialog.getFile(); if(filePath.equals("")){//没有路径时，就另存为 JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名 int bcf = jfc.showSaveDialog(jf);//弹出保存窗口 if(bcf == JFileChooser.APPROVE_OPTION){ try { //保存文件 BufferedWriter bfw = new BufferedWriter( new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt"))); filePath = jfc.getSelectedFile().getAbsolutePath(); bfw.write(content.getText());//向文件写出数据 bfw.flush(); bfw.close();//关闭输出流 } catch (IOException ex) { Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex); } } } else{//路径不为空时，保存在原来的路径下 try { //保存文件 BufferedWriter bfw = new BufferedWriter( new FileWriter( new File(filePath))); bfw.write(content.getText());//向文件写出数据 bfw.flush(); bfw.close();//关闭输出流 } catch (IOException ex) { Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex); } } } }); //另存为菜单项的功能实现 saveasitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名 int bcf = jfc.showSaveDialog(jf);//弹出保存窗口 if(bcf == JFileChooser.APPROVE_OPTION){ try { //保存文件 BufferedWriter bfw = new BufferedWriter( new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt"))); filePath = jfc.getSelectedFile().getAbsolutePath(); bfw.write(content.getText());//向文件写出数据 bfw.flush(); bfw.close();//关闭输出流 } catch (IOException ex) { Logger.getLogger(notebook.class.getName()).log(Level.SEVERE, null, ex); } } } }); //页面设置菜单项的功能实现 setitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //打印菜单项的功能实现 printitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //退出菜单项的功能实现 exititem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { Object[] options = { "是的，我要退出", "不好意思，点错了" }; int option = JOptionPane.showOptionDialog(null, "您确定要退出吗？", "退出提示....",JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE, null,options, options[0]); if(option == JOptionPane.OK_OPTION){ System.exit(0); } } }); //创建编辑菜单上的各个菜单项并添加到菜单上 MenuItem undoitem = new MenuItem("撤销（U）"); undoitem.setShortcut(new MenuShortcut(KeyEvent.VK_Z,false)); editmenu.add(undoitem); MenuItem cutitem = new MenuItem("剪切（T）"); cutitem.setShortcut(new MenuShortcut(KeyEvent.VK_X,false)); editmenu.add(cutitem); MenuItem copyitem = new MenuItem("复制（C）"); copyitem.setShortcut(new MenuShortcut(KeyEvent.VK_C,false)); editmenu.add(copyitem); MenuItem pasteitem = new MenuItem("粘贴（P）"); pasteitem.setShortcut(new MenuShortcut(KeyEvent.VK_V,false)); editmenu.add(pasteitem); MenuItem deleteitem = new MenuItem("删除（L）"); deleteitem.setShortcut(new MenuShortcut(KeyEvent.VK_DELETE,false)); editmenu.add(deleteitem); editmenu.addSeparator(); MenuItem finditem = new MenuItem("查找（F）"); finditem.setShortcut(new MenuShortcut(KeyEvent.VK_F,false)); editmenu.add(finditem); MenuItem nextitem = new MenuItem("查找下一个（N）"); nextitem.setShortcut(new MenuShortcut(KeyEvent.VK_3,false)); editmenu.add(nextitem); MenuItem replaceitem = new MenuItem("替换（R）"); replaceitem.setShortcut(new MenuShortcut(KeyEvent.VK_H,false)); editmenu.add(replaceitem); MenuItem turntoitem = new MenuItem("转到（G）"); turntoitem.setShortcut(new MenuShortcut(KeyEvent.VK_G,false)); editmenu.add(turntoitem); editmenu.addSeparator(); //复选菜单项 Menu choicemenu = new Menu("选择(C)"); MenuItem allitem = new MenuItem("全选（A）"); allitem.setShortcut(new MenuShortcut(KeyEvent.VK_A,false)); choicemenu.add(allitem); MenuItem fanxiangitem = new MenuItem("反向选择(B)"); fanxiangitem.setShortcut(new MenuShortcut(KeyEvent.VK_B,false)); choicemenu.add(fanxiangitem); MenuItem chieseitem = new MenuItem("选择汉字（C）"); chieseitem.setShortcut(new MenuShortcut(KeyEvent.VK_C,false)); choicemenu.add(chieseitem); editmenu.add(choicemenu); //编辑菜单项的时间/日期项 MenuItem dateitem = new MenuItem("时间/日期（D）"); dateitem.setShortcut(new MenuShortcut(KeyEvent.VK_5,false)); editmenu.add(dateitem); //添加监听器来实现编辑菜单上的各个菜单项的功能 //撤销菜单项的功能实现 undoitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //剪切菜单项的功能实现 cutitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { String text = content.getSelectedText(); StringSelection selection = new StringSelection(text); clipboard.setContents(selection, null); if(text.length() == 0){ return; } else{ content.replaceRange("", content.getSelectionStart(),content.getSelectionEnd()); } } }); //复制菜单项的功能实现 copyitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { String text = content.getSelectedText(); StringSelection selection = new StringSelection(text); clipboard.setContents(selection, null); } }); //粘贴菜单项的功能实现 pasteitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { Transferable contents = clipboard.getContents(this); String str =null; try { str = (String) contents.getTransferData(DataFlavor.stringFlavor); } catch (UnsupportedFlavorException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } if (str == null) return; try { content.replaceRange(str,content.getSelectionStart(),content.getSelectionEnd()); } catch (Exception e1) { e1.printStackTrace(); } } }); //删除菜单项的功能实现 deleteitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { content.replaceRange("",content.getSelectionStart(),content.getSelectionEnd()); } }); //查找菜单项的功能实现 finditem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { final JDialog dialog = new JDialog(jf,"查找字符串...",true); dialog.setBounds(560,250,310,130); JLabel find = new JLabel("请输入字符串 :"); final JTextField findtext = new JTextField(1); JButton jbu = new JButton("查找"); dialog.setLayout(null); find.setBounds(10,30,90,20); findtext.setBounds(100,30,90,20); jbu.setBounds(200,30,80,20); dialog.add(find); dialog.add(findtext); dialog.add(jbu); jbu.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { String text = content.getText(); String str = findtext.getText(); int end = text.length(); int len = str.length(); int start = content.getSelectionEnd(); if(start == end){ start = 0; } for(;start<=end-len;start++){ if(text.substring(start,start+len).equals(str)){ content.setSelectionStart(start); content.setSelectionEnd(start+len); return; } } //若找不到待查字符串，则将光标置于末尾 content.setSelectionStart(end); content.setSelectionEnd(end); } }); dialog.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e){ dialog.dispose(); } }); dialog.setResizable(false); dialog.setVisible(true); } }); //查找下一个菜单项的功能实现 nextitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //替换菜单项的功能实现 replaceitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { final JDialog dialog = new JDialog(jf,"字符串替换...",true); dialog.setBounds(560,250,310,180); final JLabel tihuan = new JLabel("请输入要替换的字符串 ："); JLabel mubiao = new JLabel("请输入替换后的字符串 ："); JTextField jtf1 = new JTextField(10); JTextField jtf2 = new JTextField(10); JButton jb = new JButton("替换"); dialog.setLayout(null); tihuan.setBounds(10,30,150,20); mubiao.setBounds(10,70,150,20); jtf1.setBounds(160,30,110,20); jtf2.setBounds(160,70,110,20); jb.setBounds(100,110,80,20); dialog.add(tihuan); dialog.add(mubiao); dialog.add(jtf1); dialog.add(jtf2); dialog.add(jb); final String text = content.getText(); final String str1 = tihuan.getText(); final String str2 = mubiao.getText(); jb.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { if(content.getSelectedText().equals(tihuan.getText())){ content.replaceRange(str2,content.getSelectionStart(),content.getSelectionEnd()); } else { int end=text.length(); int len=str1.length(); int start=content.getSelectionEnd(); if(start==end) start=0; for(;start<=end-len;start++){ if(text.substring(start,start+len).equals(str1)){ content.setSelectionStart(start); content.setSelectionEnd(start+len); return; } } //若找不到待查字符串，则将光标置于末尾 content.setSelectionStart(end); content.setSelectionEnd(end); } } }); dialog.setResizable(false); dialog.setVisible(true); } }); //转到菜单项的功能实现 turntoitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //全选菜单项的功能实现 allitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { content.selectAll(); } }); //反向选择菜单项的功能实现 fanxiangitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //选择汉字菜单项的功能实现 chieseitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //时间菜单项的功能实现 dateitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //创建格式菜单上的各个菜单项并添加到菜单上 CheckboxMenuItem lineturnitem = new CheckboxMenuItem("自动换行（W）"); formatmenu.add(lineturnitem); formatmenu.addSeparator(); MenuItem worditem = new MenuItem("字体（F）"); formatmenu.add(worditem); worditem.setEnabled(true); formatmenu.addSeparator(); MenuItem coloritem = new MenuItem("字体颜色（C）"); formatmenu.add(coloritem); //添加监听器来实现格式菜单上的各个菜单项的功能 //自动换行菜单项的功能实现 lineturnitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //字体菜单项的功能实现 worditem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { final JFrame ztsz = new JFrame("字体设置...");//字体设置窗口 //字体 ztsz.setLocation(150, 200); jf.setEnabled(false);//文本编辑窗体不可用！ final JComboBox jc = new JComboBox( GraphicsEnvironment.getLocalGraphicsEnvironment() .getAvailableFontFamilyNames()); jc.setLocation(30, 80); Container c = ztsz.getContentPane(); JPanel jp = new JPanel(); jp.add(jc,new FlowLayout()); //字形 String[] faceString={"正常","粗体","斜体","粗斜体"}; String[] sizeString={"初号","小初","一号","小一","二号","小二", "三号","小三","四号","小四","五号","小五","六号","小六","七号", "八号","5","8","9","10","11","12","14","16","18","20","22","24", "26","28","36","48","72"}; final JComboBox zx = new JComboBox(faceString); final JComboBox dx = new JComboBox(sizeString); final JButton sure = new JButton("确定"); final JButton cancel = new JButton("取消"); jp.add(zx); jp.add(dx); jp.add(sure); jp.add(cancel); c.add(jp); //确定 sure.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){//将文本设置成所选的字体 if(!content.getText().equals("")){ content.setFont(new Font( jc.getActionCommand(),zx.getSelectedIndex(), dx.getSelectedIndex())); jf.setEnabled(true);//文本编辑窗体可用 ztsz.dispose(); } else{ JOptionPane.showMessageDialog(null, "您的文本中还没有内容，请输入内容后重新设置！" ,"消息...",JOptionPane.INFORMATION_MESSAGE); jf.setEnabled(true); ztsz.dispose(); } } }); cancel.addActionListener(new ActionListener(){//取消 public void actionPerformed(ActionEvent e){ jf.setEnabled(true);//文本编辑窗体可用 ztsz.dispose();//关闭字体设置窗体 } }); ztsz.setSize(360, 100);//设置窗体长度100和宽度360 ztsz.setVisible(true);//窗体可见 ztsz.setResizable(false);//禁止放大窗体 } }); //字体颜色菜单项的功能实现 coloritem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { color=JColorChooser.showDialog(jf,"",color); content.setForeground(color); } }); //添加监听器来实现查看菜单上的各个菜单项的功能 //字数统计菜单项的功能实现 MenuItem countitem = new MenuItem("字数统计（C）"); viewmenu.add(countitem); countitem.setEnabled(true); countitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //状态栏菜单项的功能实现 MenuItem stateitem = new MenuItem("状态栏（S）"); viewmenu.add(stateitem); stateitem.setEnabled(false); stateitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { } }); //创建帮助菜单上的各个菜单项并添加到菜单上 MenuItem findhelpitem = new MenuItem("查看帮助（H）"); helpmenu.add(findhelpitem); findhelpitem.setEnabled(false); helpmenu.addSeparator(); MenuItem aboutboxitem = new MenuItem("关于记事本（A）"); helpmenu.add(aboutboxitem); helpmenu.addSeparator(); MenuItem writeritem = new MenuItem("关于作者（S）"); helpmenu.add(writeritem); //添加监听器来实现帮助菜单上的各个菜单项的功能 //查看帮助菜单项的功能实现 findhelpitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ } }); //关于记事本菜单项的功能实现 aboutboxitem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(jf,"本软件由孤独的野狼制作！\n如需要源代码，随时欢迎联系作者！\n" + "作者邮箱：sunchuanhui212@126.com\nQQ号：2442701497\n本程序基本上实现了Microsoft记事本的功能\n" + "并新增了“反向选择”，“选择汉字”\n" + "“字数统计”,“自动保存”等功能 ...\n希望您喜欢！\n" + "如有任何疑问及改善意见，随时欢迎指出，\n我们将尽最大的努力满足您的需求！\n" + "最后谢谢您的使用！\n版权所有，请勿侵权！","关于记事本...",JOptionPane.INFORMATION_MESSAGE); } }); //关于作者菜单项的功能实现 writeritem.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ JOptionPane.showMessageDialog(jf,"作者：孤独的野狼\n性别：男\n籍贯：湖南邵阳\n出生日：1990年11月9日\n" + "本科院校：上海应用技术学院\n现居地：上海\n：不帅也不丑\n偶像：爱因斯坦\n" + "最喜欢的歌手：刀郎\n最向往的地方：北京\n座右铭：疯狂源自梦想\n" + " 勤奋铸就辉煌\n最喜欢的话：我愿变成一座石桥，受五百年风吹，五百年雨打，\n" + " 五百年日晒，只求你从上面走过...\n" + "梦想：天地有多大，梦有多潇洒\n","关于作者...",JOptionPane.INFORMATION_MESSAGE); } }); //关闭程序事件 jf.addWindowListener(new WindowAdapter(){ //程序关闭时的方法 public void windowClosing(WindowEvent e){ int option = JOptionPane.showConfirmDialog(null, "您确定关闭吗？", "关闭提示....",JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE); if(option == JOptionPane.OK_OPTION){ ((Window) e.getComponent()).dispose(); System.exit(0); } } }); } public static void main(String[] args){ new notebook(); } } //新构想： //记事本程序添加音乐盒功能，音乐在后台播放 //程序并不实际保存音乐文件，只保存音乐文件的地址 //为程序保留20M空间或20M的数据库用于音乐播放 //为本程序添加自动保存功能，每一分钟保存一次，后台保存 //可能要用到多线程 //如果用户选择的保存地址与默认的地址不同，则删除默认地址保存的文件 //并且在本次操作中一直使用用户选择的保存地址 //但在下次操作时仍使用本程序默认的地址 //告诉用户默认的地址，让用户能找到程序为用户保存的文件 //最好在“关于记事本”的文档中插入相应的超链接，方便用户 //这样做能让用户在出现死机和突然断电时劳动成果不至于付诸东流