java版Notepad

阳光穿透心脏的1/2处 2024-02-18 14:39 17阅读 0赞

java版Notepad

经常有人找这个，发一个增加点访问量

import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.io.*;
    import javax.swing.undo.*;
    import javax.swing.event.*;
    public class NotePad extends JFrame {
     private UndoManager manager;
     private JFileChooser choose;
     private File selectedfile;
     private JTextArea text;
     private java.awt.Container container;
     private JMenuBar menuBar;
     private JTextField status;
     private boolean newPage = false;
     // File菜单
     private JMenu menu;
     private JMenuItem newText;
     private JMenuItem open;
     private JCheckBoxMenuItem readOnly;
     private JMenuItem save;
     private JMenuItem saveAs;
     private JMenuItem exit;
     // Edit菜单
     private JMenu edit;
     private JMenuItem undo;
     private JMenuItem redo;
     private JMenuItem cut;
     private JMenuItem copy;
     private JMenuItem copyAll;
     private JMenuItem paste;
     private JMenuItem delete;
     private JMenuItem deleteAll;
     private JMenuItem selectAll;
     private JMenuItem searchAndReplace;
     // 视图菜单
     private JMenu view;
     private JCheckBoxMenuItem wrap;
     private JCheckBoxMenuItem onTop;
     private JMenuItem zoomIn;
     private JMenuItem zoomOut;
     // 工具菜单
     private JMenu tool;
     private JMenuItem fontSum;
     private JMenuItem setcolor;
     private JMenuItem setFontColor;
     // 帮助菜单
     private JMenu help;
     private JMenuItem about;
     // 右键菜单
     private JPopupMenu pop;
     private JMenuItem popUndo;
     private JMenuItem popRedo;
     private JMenuItem popCut;
     private JMenuItem popCopy;
     private JMenuItem popSelectAll;
     private JMenuItem popCopyAll;
     private JMenuItem popPaste;
     private JMenuItem popDelete;
     private JMenuItem popClear;
    
     public NotePad() {
      super("记事本");
      try{
       UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      }catch(Exception e){}
      container = getContentPane();
      container.setLayout(new BorderLayout(0,-2));
      manager = new UndoManager();
      text = new JTextArea();
      text.setFont(new Font("宋体",Font.PLAIN,14));
      text.getDocument().addUndoableEditListener(manager);
      text.setTabSize(2);
      text.setSelectedTextColor(Color.WHITE);
      text.setSelectionColor(Color.DARK_GRAY);
      text.setLineWrap(true);
      text.setWrapStyleWord(true);
      text.setCaretColor(Color.RED);
      text.setMargin(new Insets(3, 10, 3, 7));
      text.setDragEnabled(true);
      container.add(new JScrollPane(text,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED));
      menuBar = new JMenuBar();
      // File菜单
      menu = new JMenu("文件(F)");
      menu.setMnemonic('F');
      newText = new JMenuItem("新建(N)");
      newText.setMnemonic('N');
      newText.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if(selectedfile == null && !text.getText().equals("")  &&
          JOptionPane.showConfirmDialog(container, "是否保存", "是否保存", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION){
         choose = new JFileChooser();
         int state = choose.showSaveDialog(container);
         if (state == JFileChooser.APPROVE_OPTION) {
          try {
           File file = choose.getSelectedFile();
           FileWriter os = new FileWriter(file);
           os.write(text.getText(), 0, text.getText().length());
           os.flush();
           file.createNewFile();
           os.close();
          } catch (IOException e) {
           JOptionPane.showMessageDialog(container, "保存文件失败","ERROR", JOptionPane.ERROR_MESSAGE);
          }
         }
        }else if(selectedfile != null && 
          JOptionPane.showConfirmDialog(container, "是否保存", "是否保存", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION){
        try {
          FileWriter os = new FileWriter(selectedfile);
          os.write(text.getText(), 0, text.getText().length());
          os.flush();
          os.close();
        } catch (IOException e) {}
       }
       text.setText("");
       newPage = true; 
       selectedfile = null;
       status.setText("");
       }
      });
    
      open = new JMenuItem("打开(O)");
      open.setMnemonic('O');
      open.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if(selectedfile!=null && 
          JOptionPane.showConfirmDialog(container, "是否保存", "是否保存", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_NO_OPTION){
         try{
          FileWriter os = new FileWriter(selectedfile);
          os.write(text.getText(), 0, text.getText().length());
          os.flush();
          os.close();
          newPage = false;
         }catch(IOException e){}
        }else if(selectedfile==null && !text.getText().equals("") &&
          JOptionPane.showConfirmDialog(container, "是否保存", "是否保存", JOptionPane.YES_NO_OPTION) == JOptionPane.YES_NO_OPTION){
         choose = new JFileChooser();
         int state = choose.showSaveDialog(container);
         if (state == JFileChooser.APPROVE_OPTION) {
          try {
           File file = choose.getSelectedFile();
           FileWriter os = new FileWriter(file);
           os.write(text.getText(), 0, text.getText().length());
           os.flush();
           file.createNewFile();
           os.close();
           newPage = false;
          } catch (IOException e) {
           JOptionPane.showMessageDialog(container, "保存文件失败",
             "ERROR", JOptionPane.ERROR_MESSAGE);
          }
         }
        }
        choose = new JFileChooser();
        choose.setFileFilter(new filter());
        int state = choose.showOpenDialog(container);
        if (state == JFileChooser.APPROVE_OPTION) {
         status.setText(choose.getSelectedFile().toString());
         try {
          selectedfile = choose.getSelectedFile();
          FileReader isr = new FileReader(selectedfile);
          text.read(isr, "");
          isr.close();
          newPage = false;
         } catch (IOException e) {
          JOptionPane.showMessageDialog(container, "打开文件失败",
            "ERROR", JOptionPane.ERROR_MESSAGE);
         }
        }
    
       }
      });
    
      readOnly = new JCheckBoxMenuItem("只读模式(R)");
      readOnly.setMnemonic('R');
      readOnly.addChangeListener(new ChangeListener() {
       public void stateChanged(ChangeEvent event) {
        if(readOnly.isSelected()){
         text.setEditable(false);
         cut.setEnabled(false);
         paste.setEnabled(false);
         delete.setEnabled(false);
         deleteAll.setEnabled(false);
         redo.setEnabled(false);
         undo.setEnabled(false);
         searchAndReplace.setEnabled(false);
         
         popClear.setEnabled(false);
         popCut.setEnabled(false);
         popDelete.setEnabled(false);
         popPaste.setEnabled(false);
         popRedo.setEnabled(false);
         popUndo.setEnabled(false);
        }
        else{
         text.setEditable(true);
         cut.setEnabled(true);
         paste.setEnabled(true);
         delete.setEnabled(true);
         deleteAll.setEnabled(true);
         redo.setEnabled(true);
         undo.setEnabled(true);
         searchAndReplace.setEnabled(true);
         
         popClear.setEnabled(true);
         popCut.setEnabled(true);
         popDelete.setEnabled(true);
         popPaste.setEnabled(true);
         popRedo.setEnabled(true);
         popUndo.setEnabled(true);
        }
       }
      });
    
      save = new JMenuItem("保存(S)");
      save.setMnemonic('S');
      save.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if (newPage == true || selectedfile == null) {
         choose = new JFileChooser();
         int state = choose.showSaveDialog(container);
         if (state == JFileChooser.APPROVE_OPTION) {
          try {
           File file = choose.getSelectedFile();
           FileWriter os = new FileWriter(file);
           os.write(text.getText(), 0, text.getText().length());
           os.flush();
           file.createNewFile();
           os.close();
           newPage = false;
          } catch (IOException e) {
           JOptionPane.showMessageDialog(container, "保存文件失败","ERROR", JOptionPane.ERROR_MESSAGE);
          }
         }
        } else if(newPage == false && selectedfile != null){
         try {
          FileWriter os = new FileWriter(selectedfile);
          os.write(text.getText(), 0, text.getText().length());
          os.flush();
          os.close();
         } catch (IOException e) {
          JOptionPane.showMessageDialog(container, "保存文件失败","ERROR", JOptionPane.ERROR_MESSAGE);
         }
        }
       }
      });
    
      saveAs = new JMenuItem("另存为(A)");
      saveAs.setMnemonic('A');
      saveAs.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        choose = new JFileChooser();
        int state = choose.showSaveDialog(container);
        if (state == JFileChooser.APPROVE_OPTION) {
         try {
          File file = choose.getSelectedFile();
          FileWriter os = new FileWriter(file);
          os.write(text.getText(), 0, text.getText().length());
          os.flush();
          file.createNewFile();
          os.close();
          newPage = false;
         } catch (IOException e) {
          JOptionPane.showMessageDialog(container, "保存文件失败","ERROR", JOptionPane.ERROR_MESSAGE);
         }
        }
       }
      });
    
      exit = new JMenuItem("退出(Q)");
      exit.setMnemonic('Q');
      exit.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        System.exit(0);
       }
      });
    
      menu.add(newText);
      menu.add(open);
      menu.add(readOnly);
      menu.add(save);
      menu.add(saveAs);
      menu.add(exit);
    
      // Edit菜单
      edit = new JMenu("编辑(E)");
      edit.setMnemonic('E');
    
      undo = new JMenuItem("撤销(U)");
      undo.setMnemonic('U');
      undo.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if (manager.canUndo())
         manager.undo();
       }
      });
    
      redo = new JMenuItem("重做(Y)");
      redo.setMnemonic('Y');
      redo.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if (manager.canRedo())
         manager.redo();
       }
      });
    
      cut = new JMenuItem("剪切(X)");
      cut.setMnemonic('X');
      cut.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.cut();
       }
      });
    
      copy = new JMenuItem("复制(C)");
      copy.setMnemonic('C');
      copy.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.copy();
       }
      });
    
      copyAll = new JMenuItem("复制所有(Z)");
      copyAll.setMnemonic('Z');
      copyAll.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.selectAll();
        text.copy();
       }
      });
    
      paste = new JMenuItem("粘贴(V)");
      paste.setMnemonic('V');
      paste.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.paste();
       }
      });
    
      delete = new JMenuItem("删除(D)");
      delete.setMnemonic('D');
      delete.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.replaceRange("", text.getSelectionStart(), text
          .getSelectionEnd());
       }
      });
    
      deleteAll = new JMenuItem("删除所有(W)");
      deleteAll.setMnemonic('W');
      deleteAll.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.replaceRange("", 0, text.getText().length());
       }
      });
    
      selectAll = new JMenuItem("选择所有(B)");
      selectAll.setMnemonic('B');
      selectAll.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.selectAll();
       }
      });
    
      searchAndReplace = new JMenuItem("查找与替换(M)");
      searchAndReplace.setMnemonic('M');
      searchAndReplace.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        new Search();
       }
      });
    
      edit.add(undo);
      edit.add(redo);
      edit.addSeparator();
      edit.add(selectAll);
      edit.add(cut);
      edit.add(copy);
      edit.add(copyAll);
      edit.add(paste);
      edit.add(delete);
      edit.add(deleteAll);
      edit.addSeparator();
      edit.add(searchAndReplace);
    
      // 视图菜单
      view = new JMenu("视图(V)");
      view.setMnemonic('V');
    
      wrap = new JCheckBoxMenuItem("自动换行(J)");
      wrap.setSelected(true);
      wrap.setMnemonic('J');
      wrap.addChangeListener(new ChangeListener() {
       public void stateChanged(ChangeEvent event) {
        text.setLineWrap(wrap.isSelected());
       }
      });
      
      onTop = new JCheckBoxMenuItem("保持窗口在最上");
      onTop.addChangeListener(
        new ChangeListener(){
         public void stateChanged(ChangeEvent event){
          keepOnTop(onTop.isSelected());
         }
        }
        );
      
      
      zoomIn = new JMenuItem("放大页面(I)");
      zoomIn.setMnemonic('I');
      zoomIn.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        String fontName = text.getFont().getFontName();
        int fontSize = text.getFont().getSize();
        int style = text.getFont().getStyle();
        if (fontSize < 70)
         text.setFont(new Font(fontName, style, fontSize + 2));
       }
      });
    
      zoomOut = new JMenuItem("缩小页面(O)");
      zoomOut.setMnemonic('O');
      zoomOut.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        String fontName = text.getFont().getFontName();
        int fontSize = text.getFont().getSize();
        int style = text.getFont().getStyle();
        if (fontSize > 9)
         text.setFont(new Font(fontName, style, fontSize - 1));
       }
      });
    
      view.add(wrap);
      view.addSeparator();
      view.add(onTop);
      view.addSeparator();
      view.add(zoomIn);
      view.add(zoomOut);
    
      // 工具菜单
      tool = new JMenu("工具(T)");
      tool.setMnemonic('T');
      fontSum = new JMenuItem("字数统计(L)");
      fontSum.setMnemonic('L');
      fontSum.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        String all = text.getText();
        int space = 0;// 空格
        int letter = 0;// 英文字母
        int digit = 0;// 数字
        int enter = 0;// 换行
        int other = 0;// 其它
        int otherLetter = 0;
        for (int i = 0; i < all.length(); i++) {
         char ch = all.charAt(i);
         if (Character.isDigit(ch))
          digit++;
         else if (Character.isLowerCase(ch)
           || Character.isUpperCase(ch))
          letter++;
         else if (Character.isLetter(ch))
          otherLetter++;
         else if (Character.isSpaceChar(ch))
          space++;
         else if (ch == 10)
          enter++;
         else
          other++;
        }
        JOptionPane.showMessageDialog(container, "字符个数：\n\n数字：" + digit
          + "\n英文字母：" + letter + "\n其它字母:" + otherLetter
          + "\n空格：" + space + "\n换行：" + enter + "\n其它：" + other,
          "字符统计", JOptionPane.INFORMATION_MESSAGE);
       }
      });
      setFontColor = new JMenuItem("设置字体颜色");
      setFontColor.addActionListener(
        new ActionListener(){
         public void actionPerformed(ActionEvent event){
          Color color = JColorChooser.showDialog(container, "字体色选择", Color.BLACK);
          text.setForeground(color);
         }
        }
        );
      
      setcolor = new JMenuItem("设置背景色(G)");
      setcolor.setMnemonic('G');
      setcolor.addActionListener(
        new ActionListener(){
         public void actionPerformed(ActionEvent event){
          Color color = JColorChooser.showDialog(container, "背景色选择", Color.WHITE);
          text.setBackground(color);
         }
        }
        );
      
      tool.add(fontSum);
      //tool.add(setfont);
      tool.add(setFontColor);
      tool.add(setcolor);
    
      // 帮助菜单
      help = new JMenu("帮助(H)");
      help.setMnemonic('H');
      about = new JMenuItem("关于(P)");
      about.setMnemonic('P');
      about.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        JOptionPane.showMessageDialog(container, "Java记事本", "关于",
          JOptionPane.INFORMATION_MESSAGE);
       }
      });
    
      help.add(about);
    
      menuBar.add(menu);
      menuBar.add(edit);
      menuBar.add(view);
      menuBar.add(tool);
      menuBar.add(help);
    
      // popupMenu
      pop = new JPopupMenu();
      popUndo = new JMenuItem("撤销");
      popUndo.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if (manager.canUndo())
         manager.undo();
       }
      });
      popRedo = new JMenuItem("重做");
      popRedo.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        if (manager.canRedo())
         manager.redo();
       }
      });
      popCut = new JMenuItem("剪切");
      popCut.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.cut();
       }
      });
      popCopy = new JMenuItem("复制");
      popCopy.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.copy();
       }
      });
      popSelectAll = new JMenuItem("全部选择");
      popSelectAll.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.selectAll();
       }
      });
      popCopyAll = new JMenuItem("全部复制");
      popCopyAll.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.selectAll();
        text.copy();
       }
      });
      popPaste = new JMenuItem("粘贴");
      popPaste.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.paste();
       }
      });
      popDelete = new JMenuItem("删除");
      popDelete.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.replaceRange("", text.getSelectionStart(), text
          .getSelectionEnd());
       }
      });
      popClear = new JMenuItem("清空");
      popClear.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent event) {
        text.setText("");
       }
      });
    
      pop.add(popUndo);
      pop.add(popRedo);
      pop.addSeparator();
      pop.add(popCut);
      pop.add(popCopy);
      pop.add(popPaste);
      pop.add(popCopyAll);
      pop.add(popSelectAll);
      pop.add(popDelete);
      pop.add(popClear);
    
      text.add(pop);
      text.addMouseListener(new MouseAdapter() {
       public void mouseReleased(MouseEvent event) {
        if (event.isPopupTrigger()) {
         pop.setVisible(true);
         pop.show(text, event.getX(), event.getY());
        }
       }
      });
    
      status = new JTextField();
      status.setEditable(false);
      container.add(status, BorderLayout.SOUTH);
      setSize(730, 660);
      // pack();
      container.add(menuBar, BorderLayout.NORTH);
      Dimension frameSize = getSize();
      Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
      setLocation((screenSize.width - frameSize.width) / 2,
        (screenSize.height - frameSize.height) / 2);
      setVisible(true);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      
     }
    
     
     public static void main(String args[]) {
      new NotePad();
     }
    
     private void keepOnTop(boolean b){
      setAlwaysOnTop(b);
     }
     
     private class Search extends JFrame {
    
      private JTabbedPane tab;
      private Container cont;
      // 查找
      private JPanel searPanel;
      private JTextField searField;
      private JButton searButton;
    
      // 替换
      private JPanel replPanel;
      private JPanel buttonPanel;
      private JTextField replField;
      private JButton replButton;
      private JLabel label;
      private JTextField replSear;
    
      public Search() {
       super("查找与替换");
       cont = getContentPane();
       tab = new JTabbedPane(JTabbedPane.TOP);
    
       // 查找
       searPanel = new JPanel(new FlowLayout());
       searField = new JTextField(15);
       searButton = new JButton("查找下一处");
       searPanel.add(searField);
       searPanel.add(searButton);
       searButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent event) {
         String searText = searField.getText().trim();
         if (searText.equals("")) {
          JOptionPane.showMessageDialog(cont, "查找串为空", "提示信息",JOptionPane.INFORMATION_MESSAGE);
         } else {
          String allText = text.getText();
          int start = allText.indexOf(searText, text.getSelectionEnd());
          if (start == -1)
           JOptionPane.showMessageDialog(container,"已到达文件末尾，没有找到\n" + searText, "提示信息",JOptionPane.INFORMATION_MESSAGE);
          else
           text.select(start, start + searText.length());
         }
        }
       });
    
       // 替换
       replPanel = new JPanel(new GridLayout(3, 1));
       buttonPanel = new JPanel(new FlowLayout());
       label = new JLabel("替换为");
       replField = new JTextField(15);
       replSear = new JTextField(15);
       replButton = new JButton("替换下一处");
       replButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent event) {
         String searText = replSear.getText();
         if (searText.equals("")) {
          JOptionPane.showMessageDialog(cont, "要替换的串为空", "提示信息", JOptionPane.INFORMATION_MESSAGE);
         } else {
          String allText = text.getText();
          int start = allText.indexOf(searText, text.getSelectionEnd());
          if (start == -1)
           JOptionPane.showMessageDialog(container, "替换完毕","提示信息", JOptionPane.INFORMATION_MESSAGE);
          else
           text.replaceRange(replField.getText(), start, start + searText.length());
         }
        }
       });
       replPanel.add(replSear);
       replPanel.add(label);
       replPanel.add(replField);
       buttonPanel.add(replButton);
       JPanel panel = new JPanel(new FlowLayout());
       panel.add(replPanel);
       panel.add(buttonPanel);
    
       tab.addTab("查找", searPanel);
       tab.addTab("替换", panel);
       tab.setVisible(true);
       cont.add(tab);
       pack();
       Point paraLoca = container.getLocationOnScreen();
       setLocation(paraLoca.y + getSize().width, paraLoca.x
         + getSize().height);
       setVisible(true);
       setResizable(false);
       addWindowListener(new WindowAdapter() {
        public void windowClosing() {
         dispose();
        }
       });
      }
     }
     
     private class filter extends javax.swing.filechooser.FileFilter {
      public boolean accept(File file){
       String name = file.getName().toLowerCase();
       if(name.endsWith(".txt") || name.endsWith(".cmd") ||file.isDirectory() ||
         name.endsWith(".sql") || name.endsWith(".properties") || name.endsWith(".java") ||
         name.endsWith(".cpp") || name.endsWith(".c") || name.endsWith(".css") ||
         name.endsWith(".js") || name.endsWith(".xml") || name.endsWith(".html") || 
         name.endsWith(".log"))
        return true;
       else
        return false;
      }
      public String getDescription(){
       return ".txt | .cmd | .sql |.properties | .java | .cpp | .c | .css | .js | .xml | .html |.log";
      }
     }
    }