(JAVA)记事本

/*

 * 记事本程序

 * 编写时间:2010.3.12

 */

import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.FlowLayout;

import java.awt.Font;

import java.awt.GraphicsEnvironment;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.InputEvent;

import java.awt.event.KeyEvent;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import java.io.*;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JPanel;

import javax.swing.KeyStroke;

public class TextFrame extends JFrame{

    private JFrame frame;

    private JTextArea jta;

    private JScrollPane jsp;

    private JMenu wj;

    private JMenu bj;

    private JMenu gs;

    private JMenu ck;

    private JMenu bz;

    private JMenuBar jmb;

    private JMenuItem xj;

    private JMenuItem dk;

    private JMenuItem bc;

    private JMenuItem lcw;

    private JMenuItem ymsz;

    private JMenuItem dy;

    private JMenuItem tc;

    private JMenuItem cx;

    private JMenuItem jq;

    private JMenuItem fz;

    private JMenuItem zt;

    private JMenuItem sc;

    private JMenuItem cz;

    private JMenuItem czxyg;

    private JMenuItem th;

    private JMenuItem zd;

    private JMenuItem qx;

    private JMenuItem sj;

    private JMenuItem zdhh;

    private JMenuItem zti;

    private JMenuItem ztl;

    private JMenuItem bzzt;

    private JMenuItem gy;

    private String lj = "";

   public TextFrame(){

   frame = new JFrame("Java记事本");

   frame.setLocation(100, 100);

   Container c = frame.getContentPane();

   jta = new JTextArea(30,60);

   jsp = new JScrollPane(jta);

   wj = new JMenu("文件(F)");//工具栏

   bj = new JMenu("编辑(E)");

   gs = new JMenu("格式(O)");

   ck = new JMenu("查看(V)");

   bz = new JMenu("帮助(H)");

   wj.setMnemonic('F');//为工具栏设置快捷键(Alt+'  ')

   gs.setMnemonic('O');//为工具栏设置快捷键(Alt+'  ')

   ck.setMnemonic('V');//为工具栏设置快捷键(Alt+'  ')

   bj.setMnemonic('E');//为工具栏设置快捷键(Alt+'  ')

   bz.setMnemonic('H');//为工具栏设置快捷键(Alt+'  ')

   jmb = new JMenuBar();

   xj = new JMenuItem("新建(N)");

   dk = new JMenuItem("打开(O)…");

   bc = new JMenuItem("保存(S)");

   lcw = new JMenuItem("另存为(A)…");

   ymsz = new JMenuItem("页面设置(U)…");

   dy = new JMenuItem("打印(P)…");

   tc = new JMenuItem("退出(X)");

   xj.setMnemonic('N');//设置快捷键(' ')

   xj.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_N,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   dk.setMnemonic('O');//设置快捷键(' ')

   dk.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_O,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   bc.setMnemonic('S');//设置快捷键(' ')

   bc.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_S,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   lcw.setMnemonic('A');//设置快捷键(' ')

   ymsz.setMnemonic('U');//设置快捷键(' ')

   dy.setMnemonic('P');//设置快捷键(' ')

   dy.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_P,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   tc.setMnemonic('X');//设置快捷键(' ')

   wj.add(xj);

   wj.add(dk);

   wj.add(bc);

   wj.add(lcw);

   wj.add(ymsz);

   wj.add(dy);

   wj.add(tc);

   cx = new JMenuItem("撤消(U)");

   jq = new JMenuItem("剪切(T)");

   fz = new JMenuItem("复制(C)");

   zt = new JMenuItem("粘贴(P)");

   sc = new JMenuItem("删除(L)");

   cz = new JMenuItem("查找(F)");

   czxyg = new JMenuItem("查找下一个(N)");

   th = new JMenuItem("替换(R)");

   zd = new JMenuItem("转到(G)");

   qx = new JMenuItem("全选(A)");

   sj = new JMenuItem("时间/日期(D)");

   cx.setMnemonic('U');//设置快捷键(' ')

   cx.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_Z,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   jq.setMnemonic('T');//设置快捷键(' ')

   jq.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_X,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   fz.setMnemonic('C');//设置快捷键(' ')

   fz.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_C,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   zt.setMnemonic('P');//设置快捷键(' ')

   zt.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_V,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   sc.setMnemonic('L');//设置快捷键(' ')

   sc.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_DELETE,0));//设置快捷键(DELETE)

   cz.setMnemonic('F');//设置快捷键(' ')

   cz.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_F,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   czxyg.setMnemonic('N');//设置快捷键(' ')

   czxyg.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0));//设置快捷键(F3)

   th.setMnemonic('R');//设置快捷键(' ')

   th.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_H,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   zd.setMnemonic('G');//设置快捷键(' ')

   zd.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_G,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   qx.setMnemonic('A');//设置快捷键(' ')

   qx.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_A,InputEvent.CTRL_MASK));//设置快捷键(ctl+" ")

   sj.setMnemonic('D');//设置快捷键(' ')

   sj.setAccelerator(

           KeyStroke.getKeyStroke(

           KeyEvent.VK_F5,0));//设置快捷键(F5)

   bj.add(cx);

   bj.add(jq);

   bj.add(fz);

   bj.add(zt);

   bj.add(sc);

   bj.add(cz);

   bj.add(czxyg);

   bj.add(th);

   bj.add(zd);

   bj.add(qx);

   bj.add(sj);

   zdhh = new JMenuItem("自动换行(W)");//设置快捷键(' ')

   zti = new JMenuItem("字体(F)");//设置快捷键(' ')

   zdhh.setMnemonic('W');//设置快捷键(' ')

   zti.setMnemonic('F');//设置快捷键(' ')

   gs.add(zdhh);

   gs.add(zti);

   ztl = new JMenuItem("状态栏(S)");//设置快捷键(' ')

   ztl.setMnemonic('S');//设置快捷键(' ')

   ck.add(ztl);

   bzzt = new JMenuItem("帮助主题(H)");

   gy = new JMenuItem("关于记事本(A)");

   bzzt.setMnemonic('H');//设置快捷键(' ')

   gy.setMnemonic('A');//设置快捷键(' ')

   bz.add(bzzt);

   bz.add(gy);

   jmb.add(wj);

   jmb.add(bj);

   jmb.add(gs);

   jmb.add(ck);

   jmb.add(bz);

   c.add(jmb,BorderLayout.NORTH);

   c.add(jsp,BorderLayout.CENTER);

   frame.setVisible(true);//让窗体可见

   frame.setResizable(false);//禁止窗体放大

   frame.pack();//根据窗口里面的布局及组件的preferedSize来确定frame的最佳大小

   jta.requestFocusInWindow();//输入文本域得到焦点

   /*各菜单项的单击事件*/

   //新建

   xj.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

           lj = "";//先让路径为空

           String nr = jta.getText();

           if(!nr.equals("")){//文本域里文本不为空

               int result = JOptionPane.showConfirmDialog(

                       frame, ("是否要保存?"),("保存文件"),JOptionPane.YES_NO_CANCEL_OPTION);

               if(result == JOptionPane.NO_OPTION){//不保存

                   jta.setText("");

               }

               else if(result == JOptionPane.CANCEL_OPTION){//取消新建

               }

               else if(result == JOptionPane.YES_OPTION)//选择保存

               {

                   JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名

                   int bcf = jfc.showSaveDialog(frame);

                   if(bcf == JFileChooser.APPROVE_OPTION){

                            try {

                                //保存文件

                                BufferedWriter bfw = new BufferedWriter(

                                        new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt")));

                                lj = jfc.getSelectedFile().getAbsolutePath()+".txt";//获取文件保存的路径

                                bfw.write(nr);//向文件写出数据

                                bfw.flush();

                                bfw.close();//关闭输出流

                            } catch (IOException ex) {

                                Logger.getLogger(TextFrame.class.getName()).log(Level.SEVERE, null, ex);

                            }

                       new TextFrame();//新建文本文件

                   }

               }

           }

       }

   });

   //打开

   dk.addActionListener(new ActionListener(){

   public void actionPerformed(ActionEvent e){

       JFileChooser jfc = new JFileChooser();//创建一个文件选择类实例

       int dkf = jfc.showOpenDialog(frame);

       if(dkf == JFileChooser.APPROVE_OPTION){//单击了打开文件窗体中的确定

           try {

               FileInputStream input = new FileInputStream(new File(

                       jfc.getSelectedFile().getAbsolutePath()));

               int sum = input.available();//得到输入流文件的长度

               byte texts[] = new byte[sum];//用来保存读取到的数据

               input.read(texts);//将文件读取到texts字节数组中

//               BASE64Encoder enc=new BASE64Encoder();

//               String str = enc.encode(texts);//字节数组转换成String

               String str = new String(texts,"GB2312");//将字节数组转换成中文字符

               jta.setText(str);

//                        FileInputStream is = new FileInputStream(

//                                jfc.getSelectedFile().getAbsolutePath());

//                        InputStreamReader streamReader =

//                                new InputStreamReader(is, "GB2312");

//                        int in = 0;

//                        char ch [] = new char[1024];

//                        String text = "";

//                        char s = ' ';

//                        while((in = streamReader.read(ch))!=-1){

//                            for(int i=0;i

//                            s = ch[i];

//                            text += s;

//                        }

//                        jta.setText(text);

//                        }

                        //streamReader.close();

                    } catch (Exception ex) {

                        Logger.getLogger(TextFrame.class.getName()).log(Level.SEVERE, null, ex);

                    }

       }

       else

           lj = "";

   }

   });

   //保存

   bc.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

           if(lj.equals("")){//没有路径时,就另存为

               JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名

                   int bcf = jfc.showSaveDialog(frame);//弹出保存窗口

                   if(bcf == JFileChooser.APPROVE_OPTION){

                            try {

                                //保存文件

                                BufferedWriter bfw = new BufferedWriter(

                                        new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt")));

                                lj = jfc.getSelectedFile().getAbsolutePath();

                                bfw.write(jta.getText());//向文件写出数据

                                bfw.flush();

                                bfw.close();//关闭输出流

                            } catch (IOException ex) {

                                Logger.getLogger(TextFrame.class.getName()).log(Level.SEVERE, null, ex);

                            }

                   }

           }

           else{//路径不为空时,保存在原来的路径下

               try {

                   //保存文件

                   BufferedWriter bfw = new BufferedWriter(

                           new FileWriter(

                           new File(lj)));

                   bfw.write(jta.getText());//向文件写出数据

                   bfw.flush();

                   bfw.close();//关闭输出流

               } catch (IOException ex) {

                   Logger.getLogger(TextFrame.class.getName()).log(Level.SEVERE, null, ex);

               }

           }

       }

   });

   //另存为

   lcw.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

           JFileChooser jfc = new JFileChooser();//用于选择保存路径的文件名

                   int bcf = jfc.showSaveDialog(frame);//弹出保存窗口

                   if(bcf == JFileChooser.APPROVE_OPTION){

                            try {

                                //保存文件

                                BufferedWriter bfw = new BufferedWriter(

                                        new FileWriter(new File(jfc.getSelectedFile().getAbsolutePath()+".txt")));

                                lj = jfc.getSelectedFile().getAbsolutePath();

                                bfw.write(jta.getText());//向文件写出数据

                                bfw.flush();

                                bfw.close();//关闭输出流

                            } catch (IOException ex) {

                                Logger.getLogger(TextFrame.class.getName()).log(Level.SEVERE, null, ex);

                            }

                   }

       }

   });

   //退出

   tc.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

           dispose();

           System.exit(0);

       }

   });

   //打印

   dy.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

       }

   });

   //页面设置

   ymsz.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

       }

   });

   //自动换行

   zdhh.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

          jta.setLineWrap(true);

       }

   });

   //字体(点字体设置窗体的叉能关闭字体设置窗体却不能再编辑)

   zti.addActionListener(new ActionListener(){

       public void actionPerformed(ActionEvent e){

           final JFrame ztsz = new JFrame("字体设置");

           //字体

           ztsz.setLocation(150, 200);

           frame.setEnabled(false);//文本编辑窗体不可用!

           final JComboBox zt = new JComboBox(

                   GraphicsEnvironment.getLocalGraphicsEnvironment()

                   .getAvailableFontFamilyNames());

           zt.setLocation(30, 80);

           Container c = ztsz.getContentPane();

           JPanel jp = new JPanel();

           jp.add(zt,new FlowLayout());

           //字形

           String[]   faceString={"正常","粗体","斜体","粗斜体"};

           String[]   sizeString={"初号","小初","一号","小一","二号","小二",

                  "三号","小三","四号","小四","五号","小五","六号","小六","七号",

                  "八号","5","8","9","10","11","12","14","16","18","20","22","24",

                  "26","28","36","48","72"};

           final JComboBox zx = new JComboBox(faceString);

           final JComboBox dx = new JComboBox(sizeString);

           final JButton sure = new JButton("确定");

           final JButton cancel = new JButton("取消");

           jp.add(zx);

           jp.add(dx);

           jp.add(sure);

           jp.add(cancel);

           c.add(jp);

           //确定

           sure.addActionListener(new ActionListener(){

               public void actionPerformed(ActionEvent e){

                   if(e.getSource()==sure){//将文本设置成所选的字体

                       if(!jta.getText().equals("")){

                       jta.setFont(new Font(

                               zt.getActionCommand(),zx.getSelectedIndex(),

                               dx.getSelectedIndex()));

                       frame.setEnabled(true);//文本编辑窗体可用

                       }

                       else{

                           JOptionPane.showMessageDialog(null,

                                   "你的文本中还没有字符,请输入字符后重新设置");

                           frame.setEnabled(true);

                       }

                   }

               }

           });

           cancel.addActionListener(new ActionListener(){//取消

               public void actionPerformed(ActionEvent e){

                   if(e.getSource()==cancel){//关闭字体设置窗体

                       ztsz.setVisible(false);

                       frame.setEnabled(true);//文本编辑窗体可用

                   }

               }

           });

           ztsz.setSize(360, 100);//设置窗体长度100和宽度360

           ztsz.setVisible(true);//窗体可见

           ztsz.setResizable(false);//禁止放大窗体

       }

   });

   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

   }

   public static void main(String args []){

   new TextFrame();

   }

}

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