mynotepad.java

Java记事本,类似于Windows附带的记事本

/**
 *
 * @author lidawen
 */
import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;

import javax.swing.event.*;
import javax.swing.undo.*;
import javax.swing.*;
import javax.swing.filechooser.FileFilter;

//import setfont.SetFont;
class DaveNotepad extends JFrame implements ActionListener, DocumentListener,
        MouseListener, Transferable {

    /**本程序实现一个记事本编辑器，所有的功能都和XP系统自带的记事本基本一样，多出了工具栏等一些东西
     *
     */
    private static final long serialVersionUID = 3056169543548771920L;

    /*##########################以下为变量的定义###############################*/
    File file = null;//当前文件
    boolean isNewfile = true;//指示是否为新文件
    String oldValue; //存放编辑区原来的内容，用于比较文本是否有改动
    JFileChooser filechooser = new JFileChooser(); //文件选择框
    JMenuBar mb = new JMenuBar(); //菜单条
    JMenu mf, me, mo, mh;//菜单文件、编辑、格式、帮助
    JMenuItem mi1, mi2, mi3, mi4, mi5, mi6, mi7; //文件菜单项
    JMenuItem me1, me12, me2, me3, me4, me5, me6, me7, me8, me9, me10, me11;//编辑菜单项
    JMenuItem mo1, mo2; //格式菜单项
    JMenuItem mh1, mh2;//帮助菜单项
    JToolBar tbar = new JToolBar();//工具条
    JButton bt_save, bt_new, bt_open, bt_cut, bt_copy, bt_paste, bt_undo,
            bt_redo, bt_bold, bt_underline, bt_italic; //工具条上的按钮
    JLabel fontlabel;//工具条上的字体标签
    JLabel sizelabel;//工具条上的字号标签
    JLabel statusLabel;//状态栏标签
    JPopupMenu popupMenu;//右键菜单
    JMenuItem popupMenu_Undo, popupMenu_Redo, popupMenu_Cut, popupMenu_Copy,
            popupMenu_Paste, popupMenu_Delete, popupMenu_SelectAll;
    UndoManager undo = new UndoManager(); // 撤消管理器
    Font defaultFont = new Font("宋体", Font.PLAIN, 15);//默认字体
    String fontname; //用于工具栏中文字的字体设置选项，获取用户选择的字体型
    int fontsize; //用于工具栏中文字的字号设置选项，获取用户选择的字号大小
    JTextArea tex = new JTextArea(); //文本域

//创建系统剪贴板
    Toolkit toolKit = Toolkit.getDefaultToolkit();
    Clipboard clipBoard = toolKit.getSystemClipboard();
    public JButton fontOkButton; //字体设置里的"确定"按钮

    /*################构造方法##############################*/
    public DaveNotepad() {
        super("Dave's Notepad");
        tex.setFont(defaultFont);//设置编辑区默认的字体

        //$$$$$$$$$$$$$$以下为菜单的建立$$$$$$$$$$$$$$$$$
        mb.setOpaque(false); //设置透明

        mb.setBorderPainted(true);//设置边框的可见性
        mf = new JMenu("文件(F)", true); //文件菜单

        mf.setMnemonic(KeyEvent.VK_F); //设置快捷键按下ALT+F打开本菜单
        mi1 = new JMenuItem("新建(N)"); //“新建”菜单项
        mi1.setMnemonic('N'); //设置激活键为N
        mi1.addActionListener(this); //添加监听器
        mi1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,
                InputEvent.CTRL_MASK));//设置快捷键CTRL+N激活本项
        mf.add(mi1); //添加到菜单
        //以下为上面同样的重复
        mi2 = new JMenuItem("打开(O)...");
        mi2.addActionListener(this);
        mi2.setMnemonic('O');
        mi2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,
                InputEvent.CTRL_MASK));
        mf.add(mi2);

        mi3 = new JMenuItem("保存(S)");
        mi3.addActionListener(this);
        mi3.setMnemonic('S');
        mi3.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,
                InputEvent.CTRL_MASK));
        mf.add(mi3);

        mi4 = new JMenuItem("另存为(A)...");
        mi4.addActionListener(this);
        mi4.setMnemonic('A');
        mf.add(mi4);
        mf.addSeparator(); //添加分隔线   
        mi5 = new JMenuItem("页面设置(U)...");
        mi5.addActionListener(this);
        mi5.setMnemonic('U');
        mi5.setEnabled(false);//本功能暂无
        mf.add(mi5);

        mi6 = new JMenuItem("打印(P)...");
        mi6.addActionListener(this);
        mi6.setMnemonic('P');
        mi6.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,
                InputEvent.CTRL_MASK));
        mf.add(mi6);
        mf.addSeparator(); //添加分割线
        mi7 = new JMenuItem("退出(X)");
        mi7.setMnemonic('X');
        mi7.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q,
                InputEvent.CTRL_MASK));
        mi7.addActionListener(this);
        mf.add(mi7);
        mb.add(mf);
        //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$文件菜单建立完毕$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

        //$$$$$$$$$$$$$$$$$$$$$$$$$$$$$以下为编辑菜单$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
        me = new JMenu("编辑(E)"); //编辑菜单
        me.setMnemonic(KeyEvent.VK_E);
        me1 = new JMenuItem("撤消(Z)");
        me1.addActionListener(this);
        me1.setMnemonic('Z');
        me1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,
                InputEvent.CTRL_MASK));
        me.add(me1);

        me12 = new JMenuItem("恢复撤销(B)");
        me12.addActionListener(this);
        me12.setMnemonic('B');
        me12.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_B,
                InputEvent.CTRL_MASK));
        me.add(me12);
        me.addSeparator();

        me2 = new JMenuItem("剪切(T)");
        me2.addActionListener(this);
        me2.setMnemonic('T');
        me2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,
                InputEvent.CTRL_MASK));
        me.add(me2);

        me3 = new JMenuItem("复制(C)");
        me3.addActionListener(this);
        me3.setMnemonic('C');
        me3.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,
                InputEvent.CTRL_MASK));
        me.add(me3);

        me4 = new JMenuItem("粘贴(P)");
        me4.addActionListener(this);
        me4.setMnemonic('P');
        me4.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,
                InputEvent.CTRL_MASK));
        me.add(me4);

        me5 = new JMenuItem("删除(L)");
        me5.addActionListener(this);
        me5.setMnemonic('L');
        me5.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,
                InputEvent.CTRL_MASK));
        me.add(me5);
        me.addSeparator();

        me6 = new JMenuItem("查找(F)...");
        me6.addActionListener(this);
        me6.setMnemonic('F');
        me6.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,
                InputEvent.CTRL_MASK));
        me.add(me6);

        me7 = new JMenuItem("查找下一个(N)");
        me7.addActionListener(this);
        me7.setMnemonic('N');
        me7.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,
                InputEvent.CTRL_MASK));

        me.add(me7);

        me8 = new JMenuItem("替换(R)...");
        me8.addActionListener(this);
        me8.setMnemonic('R');
        me8.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H,
                InputEvent.CTRL_MASK));
        me.add(me8);

        me9 = new JMenuItem("转到(G)...");
        me9.addActionListener(this);
        me9.setMnemonic('G');
        me9.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G,
                InputEvent.CTRL_MASK));
        me.add(me9);
        me.addSeparator();

        me10 = new JMenuItem("全选(A)");
        me10.addActionListener(this);
        me10.setMnemonic('A');
        me10.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,
                InputEvent.CTRL_MASK));
        me.add(me10);

        me11 = new JMenuItem("时间/日期(D)");
        me11.addActionListener(this);
        me11.setMnemonic('D');
        me11.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,
                InputEvent.CTRL_MASK));
        me.add(me11);
        mb.add(me);
        //$$$$$$$$$$$$$$$$$$$编辑菜单完毕$$$$$$$$$$$$$$$$$$$$$

        //$$$$$$$$$$$$$$$$$$$一下为格式菜单$$$$$$$$$$$$$$$$$$$
        mo = new JMenu("格式(O)"); //格式菜单
        mo.setMnemonic(KeyEvent.VK_O);
        mo1 = new JMenuItem("自动换行(W)");
        mo1.addActionListener(this);
        mo1.setMnemonic('W');
        mo.add(mo1);

        mo2 = new JMenuItem("字体(F)");
        mo2.addActionListener(this);
        mo2.setMnemonic('F');
// mo2.setEnabled(false);
        mo.add(mo2);
        mb.add(mo);
        //$$$$$$$$$$$$$$$格式菜单完毕$$$$$$$$$$$$$$$$$$$$$$

        //$$$$$$$$$$$$$$以下为帮助菜单$$$$$$$$$$$$$$$$$$$$$
        mh = new JMenu("帮助(H)"); //帮助菜单
        mh.setMnemonic(KeyEvent.VK_H);
        mh1 = new JMenuItem("帮助主题(H)");
        mh1.addActionListener(this);
        mh1.setMnemonic('H');
        mh1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F1,
                InputEvent.CTRL_MASK));
        mh.add(mh1);
        mh2 = new JMenuItem("关于本记事本(A)");
        mh2.addActionListener(this);
        mh2.setMnemonic('A');
        mh.add(mh2);
        mb.add(mh);
        //$$$$$$$$$$$$$帮助菜单完毕$$$$$$$$$$$$$$$$$$$$$$$$

        //$$$$$$$$$$$$$$$$$$$以下为工具条的建立$$$$$$$$$$$$$
        Icon new_icon = new ImageIcon("icons/new.gif"); //设置工具条上按钮的图标
        Icon open_icon = new ImageIcon("icons/open.gif");
        Icon save_icon = new ImageIcon("icons/save.gif");
        Icon cut_icon = new ImageIcon("icons/cut.gif");
        Icon copy_icon = new ImageIcon("icons/copy.gif");
        Icon paste_icon = new ImageIcon("icons/paste.gif");
        Icon undo_icon = new ImageIcon("icons/undo.gif");
        Icon redo_icon = new ImageIcon("icons/redo.gif");
        Icon bold_icon = new ImageIcon("icons/bold.gif");
        Icon ltalic_icon = new ImageIcon("icons/italic.gif");
        Icon underline_icon = new ImageIcon("icons/underline.gif");

        tbar.setFloatable(true); //设置工具条为可浮动
        FlowLayout flayout = new FlowLayout(FlowLayout.LEADING, 0, 0); //布局方式
        tbar.setLayout(flayout);
        flayout.setAlignOnBaseline(true);

        bt_new = new JButton(new_icon); //新建文件
        bt_open = new JButton(open_icon); //打开文件
        bt_save = new JButton(save_icon); //保存文件
        bt_undo = new JButton(undo_icon); //撤销
        bt_redo = new JButton(redo_icon); //重做
        bt_cut = new JButton(cut_icon); //剪切
        bt_copy = new JButton(copy_icon); //复制
        bt_paste = new JButton(paste_icon); //粘贴
        bt_bold = new JButton(bold_icon); //粗体
        bt_italic = new JButton(ltalic_icon); //斜体
        bt_underline = new JButton(underline_icon); //下划线

        bt_new.setToolTipText("新建文件");//设置提示文字
        bt_new.addActionListener(this);
        bt_open.setToolTipText("打开文件");
        bt_open.addActionListener(this);
        bt_save.setToolTipText("保存文件");
        bt_save.addActionListener(this);
        bt_undo.setToolTipText("撤销");
        bt_undo.addActionListener(this);
        bt_redo.setToolTipText("恢复撤销");
        bt_redo.addActionListener(this);
        bt_cut.setToolTipText("剪切");
        bt_cut.addActionListener(this);
        bt_copy.setToolTipText("复制");
        bt_copy.addActionListener(this);
        bt_paste.setToolTipText("粘贴");
        bt_paste.addActionListener(this);
        bt_bold.setToolTipText("粗体");
        bt_bold.addActionListener(this);
        bt_italic.setToolTipText("斜体");
        bt_italic.addActionListener(this);
        bt_underline.setToolTipText("下划线");
        //       bt_underline.addActionListener(this);

        tbar.add(bt_new);
        tbar.add(bt_open);
        tbar.add(bt_save);
        tbar.addSeparator();
        tbar.add(bt_undo);
        tbar.add(bt_redo);
        tbar.addSeparator();
        tbar.add(bt_cut);
        tbar.add(bt_copy);
        tbar.add(bt_paste);
        tbar.addSeparator();
        tbar.add(bt_bold);
        tbar.add(bt_italic);
        tbar.add(bt_underline);
        bt_underline.setEnabled(false);

        fontlabel = new JLabel("字体");
        tbar.addSeparator();
        tbar.add(fontlabel);
        //字体标签     
        String[] ComboStr1 = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();//获取本地的本地语言的字体
        JComboBox typecombo = new JComboBox(ComboStr1);
        typecombo.setActionCommand("Type");
        typecombo.addActionListener(this);
        typecombo.addItemListener(new ItemListener() {//添加监听器获取选择用户的字体类型
            public void itemStateChanged(ItemEvent e) {
                fontname = (String) e.getItem();
            }
        });
        tbar.add(typecombo);
        //字号标签        
        JLabel sizelabel = new JLabel("大小");
        tbar.addSeparator();
        tbar.add(sizelabel);
        String[] ComboStr2 = {"8", "9", "10", "12", "14", "15", "16", "18",
            "20", "21", "22", "24", "26", "28", "30", "36", "48", "54",
            "72", "89"
        };
        JComboBox sizecombo = new JComboBox(ComboStr2);
        sizecombo.setActionCommand("Size");
        sizecombo.addActionListener(this);
        sizecombo.addItemListener(new ItemListener() {//添加监听器获取选择用户的字号大小
            public void itemStateChanged(ItemEvent e) {
                fontsize = (new Integer((String) e.getItem()).intValue());
            }
        });
        tbar.add(sizecombo);
        //$$$$$$$$$$$$$$工具条完毕$$$$$$$$$$$$$$$$$$$$$$$$       

        //$$$$$$$$$$$$$$右键菜单$$$$$$$$$$$$$$$$$$$$$$$$$$
        popupMenu = new JPopupMenu();//右键菜单
        tex.add(popupMenu);
        tex.addMouseListener(this);