Java编写的记事本程序源码

package notepad; import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*; import java.awt.datatransfer.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.undo.*; import java.text.*; public class NotePad extends JFrame implements ActionListener{ // 工作区 JTextArea note; // 菜单工具条 JMenuBar menuBar = new JMenuBar(); // 文本框滑块 JScrollPane jScrollPane; // 初始化 文件 菜单 JMenu file = new JMenu("文件(F)"); JMenuItem build = new JMenuItem("新建(N)"); JMenuItem open = new JMenuItem("打开(O)"); JMenuItem save = new JMenuItem("保存(S)"); JMenuItem reSave = new JMenuItem("另存为(A)"); JMenuItem quit = new JMenuItem("退出(X)"); JMenuItem setPage = new JMenuItem("页面设置(U)"); JMenuItem print = new JMenuItem("打印(P)"); // 初始化 编辑 菜单 JMenu edit = new JMenu("编辑(E)"); JMenuItem retract = new JMenuItem("撤销(U)"); JMenuItem copy = new JMenuItem("复制(C)"); JMenuItem cut = new JMenuItem("剪切(T)"); JMenuItem paste = new JMenuItem("粘贴(P)"); JMenuItem delete = new JMenuItem("删除(L)"); JMenuItem find = new JMenuItem("查找(F)"); JMenuItem findNext = new JMenuItem("查找下一个(N)"); JMenuItem replace = new JMenuItem("替换(R)"); JMenuItem goTo = new JMenuItem("转到(G)"); JMenuItem selectAll = new JMenuItem("全选(A)"); JMenuItem dateAndTime = new JMenuItem("时间/日期(D)"); // 初始化 格式 菜单 JMenu format = new JMenu("格式(O)"); JCheckBoxMenuItem wrap = new JCheckBoxMenuItem("自动换行(W)", false); JMenuItem font = new JMenuItem("字体(F)"); // 初始化 查看 菜单 JMenu view = new JMenu("查看(V)"); JCheckBoxMenuItem status = new JCheckBoxMenuItem("状态栏(S)", false); // 初始化 帮助 菜单 JMenu help = new JMenu("帮助(H)"); JMenuItem title = new JMenuItem("帮助主题(H)"); JMenuItem about = new JMenuItem("关于记事本(A)"); // 右键菜单和菜单项 JPopupMenu popupMenu = new JPopupMenu(); JMenuItem popRetract = new JMenuItem("撤销(U)"); JMenuItem popCut = new JMenuItem("剪切(T)"); JMenuItem popCopy = new JMenuItem("复制(C)"); JMenuItem popPaste = new JMenuItem("粘贴(P)"); JMenuItem popSelectAll = new JMenuItem("全选(A)"); JMenuItem popDelete = new JMenuItem("删除(D)"); // 获取java中提供的类似剪切板的工具 Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard(); // 是否已经为文本文件命名 boolean isTitled; // 文件名 String fileName = "无标题"; // 文件路径 String filePath = null; // 文件打开 保存对话框 JFileChooser fileChooser = new JFileChooser(); // 文件信息的散列值，用来判断文件是否被修改过 int hashCode = -1; // //// 外部窗口窗口及其附带属性///////////////// FindDlg findDlg; ReplaceDlg replaceDlg; GoToDlg goToDlg; FontDlg fontDlg; String findKey = ""; // 查找的字符串 boolean ignoreCase = true;// 是否忽略大小写，默认忽略 boolean isUp; // 查找方向，默认向下 int mileStone; // 查找到的位置记录 boolean isFirstCall; // ////////////////////////////////////// //模拟状态栏 JPanel statusBar; JTextField tfStatus; //为撤销功能做缓存功能的字符串数组 String str1 = ""; String str2 = ""; //String retractStr[] = new String[10]; int retractNum = 0;//撤销次数 // 热键 KeyStroke ks; /** * 构造函数 */ public NotePad() { setSize(600, 500); //设置窗口标题 setTitle(fileName + "-记事本"); //初始化窗口 initComponents(); //窗口关闭事件 this.addWindowListener( new WindowAdapter(){ public void windowClosing(WindowEvent e){ onWindowClosing(); } } ); // 显示窗口 setSize(900, 700); setVisible(true); } public void onWindowClosing(){ String strTemp = note.getText(); // 新建的文件 if (!isTitled) { // 文件不为空，没有保存，退出时询问是否保存 if (strTemp.length() != 0) { int isExit = JOptionPane.showConfirmDialog(null, "文件 " + fileName + " 的文字已经改变，想保存文件吗 ?", "记事本", JOptionPane.YES_NO_CANCEL_OPTION); if (isExit == JOptionPane.YES_OPTION) { int result = fileChooser.showSaveDialog(null); if (result == JFileChooser.APPROVE_OPTION) { File file = fileChooser.getSelectedFile(); writeFile(file); System.exit(0); } } else if (isExit == JOptionPane.NO_OPTION) { System.exit(0); } else return; } // 新建的文件，但是文件内容为空，直接退出 else if (strTemp.length() == 0) { System.exit(0); } } // 打开的文件 else if (isTitled) { int newHashCode = 0; String fileContent = note.getText(); newHashCode = fileContent.hashCode(); // 从散列值判断文件被修改过，退出时询问是否保存 if (hashCode != newHashCode) { int isExit = JOptionPane.showConfirmDialog(null, "文件 " + filePath + " 的文字已经改变，想保存文件吗 ?", "记事本", JOptionPane.YES_NO_CANCEL_OPTION); if (isExit == JOptionPane.YES_OPTION) { int result = fileChooser.showSaveDialog(null); if (result == JFileChooser.APPROVE_OPTION) { File fileToSave = fileChooser.getSelectedFile(); writeFile(fileToSave); System.exit(0); } } else if (isExit == JOptionPane.NO_OPTION) { System.exit(0); } else return; } // 散列值相同，文件没有被修改过，直接退出 else { System.exit(0); } } } /** * 初始化窗口 */ public void initComponents() { // 添加 文件 菜单 file.setMnemonic('F'); build.setMnemonic('E'); open.setMnemonic('O'); save.setMnemonic('S'); reSave.setMnemonic('A'); setPage.setMnemonic('U'); print.setMnemonic('P'); quit.setMnemonic('X'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_N, Event.CTRL_MASK); build.setAccelerator(ks); file.add(build); ks = KeyStroke.getKeyStroke(KeyEvent.VK_O, Event.CTRL_MASK); open.setAccelerator(ks); file.add(open); ks = KeyStroke.getKeyStroke(KeyEvent.VK_S, Event.CTRL_MASK); save.setAccelerator(ks); file.add(save); file.add(reSave); file.addSeparator(); file.add(setPage); ks = KeyStroke.getKeyStroke(KeyEvent.VK_P, Event.CTRL_MASK); print.setAccelerator(ks); file.add(print); file.addSeparator(); file.add(quit); // 添加 编辑菜单 edit.setMnemonic('E'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_Z, Event.CTRL_MASK); retract.setAccelerator(ks); retract.setMnemonic('U'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_X, Event.CTRL_MASK); cut.setAccelerator(ks); cut.setMnemonic('T'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_C, Event.CTRL_MASK); copy.setAccelerator(ks); copy.setMnemonic('C'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_V, Event.CTRL_MASK); paste.setAccelerator(ks); paste.setMnemonic('P'); ks = KeyStroke.getKeyStroke("DELETE"); delete.setAccelerator(ks); delete.setMnemonic('L'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_F, Event.CTRL_MASK); find.setAccelerator(ks); find.setMnemonic('F'); ks = KeyStroke.getKeyStroke("F3"); findNext.setAccelerator(ks); findNext.setMnemonic('N'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_H, Event.CTRL_MASK); replace.setAccelerator(ks); replace.setMnemonic('R'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_G, Event.CTRL_MASK); goTo.setAccelerator(ks); goTo.setMnemonic('G'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_A, Event.CTRL_MASK); selectAll.setAccelerator(ks); selectAll.setMnemonic('A'); ks = KeyStroke.getKeyStroke("F5"); dateAndTime.setAccelerator(ks); dateAndTime.setMnemonic('D'); edit.add(retract); edit.addSeparator(); edit.add(cut); edit.add(copy); edit.add(paste); edit.add(delete); edit.addSeparator(); edit.add(find); edit.add(findNext); edit.add(replace); edit.add(goTo); edit.addSeparator(); edit.add(selectAll); edit.add(dateAndTime); // 添加 格式 菜单 format.setMnemonic('O'); ks = KeyStroke.getKeyStroke(KeyEvent.VK_W, Event.CTRL_MASK); wrap.setAccelerator(ks); wrap.setMnemonic('W'); font.setMnemonic('F');