功能：实现了新建，打开，保存，退出，复制，剪切，粘贴等功能
效果图：
代码：
/** * */ package com.niit.javagui; import java.awt.Color; import java.awt.MenuBar; import java.awt.event.ActionEvent; import java.awt.event.InputEvent; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.KeyEvent; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import javax.swing.AbstractAction; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JTabbedPane; import javax.swing.JTextPane; import javax.swing.KeyStroke; import javax.swing.text.DefaultStyledDocument; /** * @author: Annie * @date:2016年5月30日 * @description:简单的记事本 */ public class Notepad extends JFrame { public static void main(String[] args) { new Notepad(); } JTabbedPane tabbedPane; JPanel jp1,jp2,jp3; JMenuBar menuBar; JMenu filemenu,editMenu,formatMenu,helpmenu,checkMenu; JMenuItem itemNew,itemOpen,itemSave,itemSaveAs,itemSet,itemPrint,itemExit, itemAutomatic,itemFont,itemaStatusBar,itemaCheckHelp,itemAbout,itemCopy,itemCut,itemPast; JTextPane textpane; JFileChooser fileChooser; public Notepad(){ setVisible(true); setSize(400,400); setTitle("记事本"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); instantiationObject(); keyWord(); addFunction(); } /** * 实例化对象方法 * */ public void instantiationObject(){ jp1 = new JPanel(); jp2 = new JPanel(); jp3 = new JPanel(); tabbedPane = new JTabbedPane(JTabbedPane.BOTTOM); menuBar = new JMenuBar(); filemenu = new JMenu("文件（F）"); editMenu = new JMenu("编辑（E）"); formatMenu = new JMenu("格式（o）"); checkMenu = new JMenu("查看（V）"); helpmenu = new JMenu("帮助（H）"); itemNew = new JMenuItem(new newAction()); itemOpen = new JMenuItem(new OpenAction()); itemSave = new JMenuItem(new SaveAction()); itemSaveAs = new JMenuItem("另存为"); itemSet = new JMenuItem("页面设置"); itemPrint = new JMenuItem("打印"); itemExit = new JMenuItem(new ExistAction()); itemCopy = new JMenuItem(new CopyAction()); itemPast = new JMenuItem(new PasteAction()); itemCut = new JMenuItem(new CutAction()); itemAutomatic = new JMenuItem("自动转行"); itemFont = new JMenuItem("字体"); itemaStatusBar = new JMenuItem("状态栏"); itemaCheckHelp = new JMenuItem("查看帮助"); itemAbout = new JMenuItem("关于记事本"); textpane = new JTextPane(); //文本窗格，编辑窗口 fileChooser = new JFileChooser();//文件选择器 } /** * 添加组件方法 * */ public void addFunction(){ setJMenuBar(menuBar); menuBar.add(filemenu); menuBar.add(editMenu); menuBar.add(formatMenu); menuBar.add(checkMenu); menuBar.add(helpmenu); filemenu.add(itemNew); filemenu.add(itemOpen); filemenu.add(itemSave); filemenu.add(itemSaveAs); filemenu.addSeparator(); filemenu.add(itemSet); filemenu.add(itemPrint); filemenu.add(itemExit); editMenu.add(itemCopy); editMenu.add(itemPast); editMenu.add(itemCut); formatMenu.add(itemAutomatic); formatMenu.add(itemFont); checkMenu.add(itemaStatusBar); helpmenu.add(itemaCheckHelp); helpmenu.add(itemAbout); add(textpane); } /** * 实例化对象方法 * */ public void keyWord(){ itemNew.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK)); itemOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK)); itemSave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK)); itemSaveAs.setAccelerator(KeyStroke.getKeyStroke('A')); itemSet.setAccelerator(KeyStroke.getKeyStroke('U')); itemPrint.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,InputEvent.CTRL_MASK)); itemExit.setAccelerator(KeyStroke.getKeyStroke('X')); itemAutomatic.setAccelerator(KeyStroke.getKeyStroke('W')); itemFont.setAccelerator(KeyStroke.getKeyStroke('F')); itemaStatusBar.setAccelerator(KeyStroke.getKeyStroke('S')); itemaCheckHelp.setAccelerator(KeyStroke.getKeyStroke('H')); itemAbout.setAccelerator(KeyStroke.getKeyStroke('A')); } class newAction extends AbstractAction{ public newAction(){ super("新建"); } @Override public void actionPerformed(ActionEvent e) { textpane.setDocument(new DefaultStyledDocument()); } } class OpenAction extends AbstractAction{ public OpenAction() { super("打开"); } @Override public void actionPerformed(ActionEvent e) { int i = fileChooser.showOpenDialog(Notepad.this); // 显示打开文件选择对话框 if(i == JFileChooser.APPROVE_OPTION){//点击对话框中打开选项 File f = fileChooser.getSelectedFile();//得到选择的文件 try { InputStream is = new FileInputStream(f); textpane.read(is, "HTMLDocument"); //读入文件到文本窗格 } catch (Exception e1) { e1.printStackTrace(); } } } } class SaveAction extends AbstractAction{ public SaveAction() { super("保存"); } @Override public void actionPerformed(ActionEvent e) { int i =fileChooser.showSaveDialog(Notepad.this); if(i == JFileChooser.APPROVE_OPTION ){ /* 1.得到选择的文件 2.得到输出流 3.写入 */ File f =fileChooser.getSelectedFile(); try { OutputStream out = new FileOutputStream(f); out.write(textpane.getText().getBytes()); } catch (Exception e1) { e1.printStackTrace(); } } } } class ExistAction extends AbstractAction{ public ExistAction(){ super("退出"); } @Override public void actionPerformed(ActionEvent e) { System.exit(0); } } class CutAction extends AbstractAction { //剪切命令 public CutAction() { super("剪切"); } public void actionPerformed(ActionEvent e) { textpane.cut(); //调用文本窗格的剪切命令 } } class CopyAction extends AbstractAction { //拷贝命令 public CopyAction() { super("复制"); } public void actionPerformed(ActionEvent e) { textpane.copy(); //调用文本窗格的拷贝命令 } } class PasteAction extends AbstractAction { //粘贴命令 public PasteAction() { super("粘贴"); } public void actionPerformed(ActionEvent e) { textpane.paste(); //调用文本窗格的粘贴命令 } } }