Java仿Windows记事本源代码分享

import java.awt.*;import javax.swing.*;import javax.swing.filechooser.FileNameExtensionFilter;import javax.swing.undo.UndoManager;import java.awt.event.*;import java.io.*;/** *  * @author cjbi@outlook.com * @created 2015年7月6日 上午11:22:24 */public class JNotepad extends JFrame implements ActionListener { JMenuBar menubar = new JMenuBar(); JMenu file = new JMenu("文件(F)"); JMenu edit = new JMenu("编辑(E)"); JMenu format = new JMenu("格式(O)"); JMenu help = new JMenu("帮助(H)"); JMenuItem create = new JMenuItem("新建"); JMenuItem open = new JMenuItem("打开..."); JMenuItem save = new JMenuItem("保存"); JMenuItem saveAs = new JMenuItem("另存为..."); JMenuItem exit = new JMenuItem("退出"); JMenuItem undo = new JMenuItem("撤销"); JMenuItem cut = new JMenuItem("剪切"); JMenuItem copy = new JMenuItem("复制"); JMenuItem paste = new JMenuItem("粘贴"); JMenuItem findRep = new JMenuItem("查找替换"); JMenuItem selectAll = new JMenuItem("全选"); JMenuItem font = new JMenuItem("字体"); JMenuItem about = new JMenuItem("关于"); JMenuItem cut2 = new JMenuItem("剪切(X)"); JMenuItem copy2 = new JMenuItem("复制(C)"); JMenuItem paste2 = new JMenuItem("粘贴(V)"); JMenuItem selectAll2 = new JMenuItem("全选(A)"); public static JTextArea textarea = new JTextArea(); UndoManager um = new UndoManager(); JScrollPane scroll = new JScrollPane(textarea, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED); JPopupMenu popup = new JPopupMenu(); String pathSelect; // 获取屏幕尺寸 Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); public JNotepad() {  // 此处定义键盘快捷键  // MenuBar  file.setMnemonic(KeyEvent.VK_F);  edit.setMnemonic(KeyEvent.VK_E);  format.setMnemonic(KeyEvent.VK_O);  help.setMnemonic(KeyEvent.VK_H);  // MenuItem  create.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, ActionEvent.CTRL_MASK));  open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));  save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));  undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, ActionEvent.CTRL_MASK));  cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK));  copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, ActionEvent.CTRL_MASK));  paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK));  findRep.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, ActionEvent.CTRL_MASK));  selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, ActionEvent.CTRL_MASK));  // 事件监听者  save.addActionListener(this);  create.addActionListener(this);  open.addActionListener(this);  saveAs.addActionListener(this);  exit.addActionListener(this);  undo.addActionListener(this);  cut.addActionListener(this);  copy.addActionListener(this);  paste.addActionListener(this);  selectAll.addActionListener(this);  font.addActionListener(this);  about.addActionListener(this);  cut2.addActionListener(this);  copy2.addActionListener(this);  paste2.addActionListener(this);  selectAll2.addActionListener(this);  findRep.addActionListener(this);  // 设置撤销文本的管理器  textarea.getDocument().addUndoableEditListener(um);  textarea.setFont(Format.font);  // 文件  file.add(create);  file.add(open);  file.add(save);  file.add(saveAs);  file.addSeparator();  file.add(exit);  // 编辑  edit.add(undo);  edit.addSeparator();  edit.add(cut);  edit.add(copy);  edit.add(paste);  edit.addSeparator();  edit.add(findRep);  edit.addSeparator();  edit.add(selectAll);  // 格式  format.add(font);  // 帮助  help.add(about);  // 菜单栏  menubar.add(file);  menubar.add(edit);  menubar.add(format);  menubar.add(help);  // 右键菜单  popup.add(cut2);  popup.add(copy2);  popup.add(paste2);  popup.addSeparator();  popup.add(selectAll2);  // 添加到文本域容器  textarea.add(popup);  // 匿名内部类监听器右键动作  textarea.addMouseListener(new MouseAdapter() {   public void mouseReleased(MouseEvent e) {    if (e.getButton() == MouseEvent.BUTTON3) {     popup.show(textarea, e.getX(), e.getY());    }   }  });  // 边界布局  this.add(menubar, BorderLayout.NORTH);  this.add(scroll, BorderLayout.CENTER);  this.setTitle("记事本");  this.setSize(500, 400);  this.setLocationRelativeTo(null);  this.setIconImage(new ImageIcon(this.getClass().getResource("/icon/notepad.png")).getImage());//图标放在源目录的icon文件夹  this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);  this.setVisible(true); } // 重写actionPerformed @Override public void actionPerformed(ActionEvent e) {  // Event对象发生源  if (e.getSource() == open) {   JFileChooser chooser = new JFileChooser();   FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");   chooser.setFileFilter(filter);   chooser.setDialogTitle("文件打开");   chooser.showOpenDialog(null);   chooser.setVisible(true);   try {    pathSelect = chooser.getSelectedFile().getPath();    FileReader wjl = new FileReader(pathSelect);    BufferedReader hcl = new BufferedReader(wjl);    String s = "", zfc = "";    while ((s = hcl.readLine()) != null) {     zfc += (s + "/n");    }    textarea.setText(zfc);   } catch (Exception e1) {   }  }  if (e.getSource() == saveAs) {// 另存为   JFileChooser chooser = new JFileChooser();   FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");   chooser.setFileFilter(filter);   chooser.setDialogTitle("另存为");   chooser.showSaveDialog(null);   chooser.setVisible(true);   PrintStream ps;   try {    String select = chooser.getSelectedFile().getPath();    ps = new PrintStream(select);    System.setOut(ps);    System.out.println(this.textarea.getText());   } catch (Exception e1) {   }  }  if (e.getSource() == save && (pathSelect == null)) {// 保存   JFileChooser chooser = new JFileChooser();   chooser.setDialogTitle("保存");   chooser.showSaveDialog(null);   chooser.setVisible(true);   PrintStream ps;   try {    pathSelect = chooser.getSelectedFile().getPath();    ps = new PrintStream(pathSelect);    System.setOut(ps);    System.out.println(this.textarea.getText());   } catch (Exception e1) {   }  } else if (e.getSource() == save && !(pathSelect == null)) {   PrintStream ps;   try {    ps = new PrintStream(pathSelect);    System.setOut(ps);    System.out.println(this.textarea.getText());   } catch (FileNotFoundException e1) {   }  }  if (e.getSource() == create) {   textarea.setText("");   pathSelect = null;  }  if (e.getSource() == exit) {   System.exit(0);  }  if (e.getSource() == undo) {   if (um.canUndo()) {    um.undo();   }  }  if (e.getSource() == cut || e.getSource() == cut2) {   textarea.cut();  } else if (e.getSource() == copy || e.getSource() == copy2) {   textarea.copy();  } else if (e.getSource() == paste || e.getSource() == paste2) {   textarea.paste();  } else if (e.getSource() == findRep) {   new FindAndReplace(textarea);  }  else if (e.getSource() == selectAll || e.getSource() == selectAll2) {   textarea.selectAll();  }  if (e.getSource() == font) {   new Format(textarea);  }  if (e.getSource() == about) {   new About();  } } public static void main(String[] args) {  new JNotepad(); }}class FindAndReplace extends JDialog implements ActionListener {// 查找和替换 JLabel findLabel = new JLabel("查找内容："); JLabel repLabel = new JLabel(" 替换为："); JTextField findTf = new JTextField(8); JTextField repTf = new JTextField(8); JButton findBtn = new JButton("查找"); JButton repBtn = new JButton("替换"); JPanel findPn = new JPanel(); JPanel repPn = new JPanel(); JTextArea textarea; String text; boolean flg = false; int len; int start = 0; int k = 0; public FindAndReplace(JTextArea textarea) {  this.textarea = textarea;  findPn.add(findLabel);  findPn.add(findTf);  findPn.add(findBtn);  repPn.add(repLabel);  repPn.add(repTf);  repPn.add(repBtn);  this.add(findPn);  this.add(repPn);  findBtn.addActionListener(this);  repBtn.addActionListener(this);  this.setTitle("查找和替换");  this.setLayout(new GridLayout(2, 1));  // this.setBounds(400, 200, 300, 140);  this.pack();  this.setLocationRelativeTo(null);  this.setResizable(false);  this.setVisible(true);  this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE); } @SuppressWarnings("deprecation") public void actionPerformed(ActionEvent e) {  String findText = findTf.getText();  String repText = repTf.getText();  text = textarea.getText();  if (e.getSource() == findBtn) {   findBtn.setLabel("下一个");   if (findText != null) {    len = findText.length();    start = text.indexOf(findText, k);    k = start + len;    textarea.select(start, start + len);    flg = true;    if (start == -1) {     JOptionPane.showMessageDialog(null, "已到文件尾部！", "提示", JOptionPane.INFORMATION_MESSAGE);     start = 0;     k = 0;     flg = false;    }   }  } else if (e.getSource() == repBtn) {   if (flg) {    textarea.replaceRange(repText, start, start + len);    flg = false;   }  } }}// 字体格式class Format extends JDialog implements ActionListener { public static int style = 0; // 全局变量类型，默认值为0 public static int size = 16; // 全局变量字体大小，默认值为16 public static Font font = new Font("新宋体", style, size); // 全局变量字体，默认值为新宋体 JPanel pn = new JPanel(); JPanel okCelPn = new JPanel(); JPanel fontPn = new JPanel(); JPanel ptPn = new JPanel(); JLabel fontLabel = new JLabel("字体: "); JLabel fontStyleLabel = new JLabel(" 字形: "); JLabel ptLabel = new JLabel("  磅值: "); JButton ok = new JButton("确定"); JButton cancel = new JButton("取消"); GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();// 获取系统中可用的字体的名字 String[] fontName = e.getAvailableFontFamilyNames();// 获取系统中可用的字体的名字 String[] fontType = { "常规", "倾斜", "粗体", "粗偏斜体" }; JList fontList = new JList(fontName); JList fontTypeList = new JList(fontType); JScrollPane fontScroll = new JScrollPane(fontList); JScrollPane fontTypeScroll = new JScrollPane(fontTypeList); JTextArea textarea; SpinnerModel spinnerModel = new SpinnerNumberModel(size, // initial value   0, // min   100, // max   2 // Step ); JSpinner spinner = new JSpinner(spinnerModel); public Format(JTextArea textarea) {  this.textarea = textarea;  ok.addActionListener(this);  cancel.addActionListener(this);  pn.setLayout(new GridLayout(2, 1));  pn.add(fontPn);  pn.add(ptPn);  fontPn.add(fontLabel);  fontPn.add(fontScroll);  fontPn.add(fontStyleLabel);  fontPn.add(fontTypeScroll);  ptPn.add(ptLabel);  ptPn.add(spinner);  fontList.setVisibleRowCount(5);  fontList.setFixedCellWidth(60);  fontList.setSelectedIndex(50);  fontList.setSelectedValue(font.getFontName(), true);  fontTypeList.setVisibleRowCount(5);  fontTypeList.setSelectedIndex(style);  okCelPn.add(ok);  okCelPn.add(cancel);  okCelPn.setLayout(new FlowLayout(FlowLayout.RIGHT));  this.add(pn, BorderLayout.CENTER);  this.add(okCelPn, BorderLayout.SOUTH);  this.setTitle("字体");  this.pack();  this.setLocationRelativeTo(null);  this.setResizable(false);  this.setVisible(true);  this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); } public void actionPerformed(ActionEvent e) {  if (e.getSource() == ok) {   System.out.println(fontList.getSelectedValue());   style = this.type();   size = Integer.parseInt(spinner.getValue().toString());   font = new Font((String) fontList.getSelectedValue(), style, size);   textarea.setFont(font);   this.dispose();   System.out.println(type());  } else if (e.getSource() == cancel) {   this.dispose();  } } private int type() {  if (fontTypeList.getSelectedValue().equals("倾斜")) {   return 1;  } else if (fontTypeList.getSelectedValue().equals("粗体")) {   return 2;  } else if (fontTypeList.getSelectedValue().equals("粗偏斜体")) {   return 3;  } else   return 0; }}class About extends JDialog {// 关于窗口 About() {  JOptionPane.showMessageDialog(null, " 作者：cjb 版本：v1.5/n/n 联系：cjbi@outlook.com", "关于",    JOptionPane.PLAIN_MESSAGE); }}