J2ME的手机记事本的设计与实现

j2me 手机记事本2011年01月03日15:35import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Calendar;import java.util.Enumeration;import javax.microedition.io.Connector;import javax.microedition.io.file.FileConnection;import mand;import mandListener;import javax.microedition.lcdui.Display;import javax.microedition.lcdui.Displayable;import javax.microedition.lcdui.List;import javax.microedition.lcdui.TextBox;import javax.microedition.lcdui.TextField;import javax.microedition.midlet.MIDlet;import javax.microedition.midlet.MIDletStateChangeException;public class notebook extends MIDlet implements CommandListener{private Display dis;//////// 主窗口///////private TextBox maintbx= new TextBox("","",1024,TextField.ANY);private Command cmdnewfilename = new Command("新建文件",Command.SCREEN,3); private Command cmdopen =new Command("打开",Command.SCREEN,2);private Command cmdsave =new Command("保存",Command.SCREEN,1);private Command cmdexit =new Command("退出",Command.SCREEN,4);private Command cmdback =new Command("删除",Command.SCREEN,3);////////////新建文件输入文件名窗口//////////////private TextBox tbxinputfilename =new TextBox("请输入文件名：","",256,TextField.ANY); private Command cmdnewfilenameok = new Command("确定",Command.SCREEN,1);////////////显示文件名窗口///////////////private List listfilename = new List("文件列表",List.IMPLICIT);///////// 其他///////private FileConnection fconn;private String filename;private String initdir ="file:///root1/dayrecord/";private String date;public notebook() {dis =Display.getDisplay(this);/////////////初始化主窗口/////////////////maintbx.addCommand(cmdnewfilename);maintbx.addCommand(cmdopen);maintbx.addCommand(cmdsave);maintbx.addCommand(cmdback);maintbx.addCommand(cmdexit);maintbx.setCommandListener(this);///////////////输入文件名窗口初始化///////////////////tbxinputfilename.addCommand(cmdnewfilenameok);tbxinputfilename.setCommandListener(this);/////////显示文件名初始化///////////listfilename.setCommandListener(this);//////////////////////dis.setCurrent(maintbx);date =this.getdate();}protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }protected void pauseApp() {}protected void startApp() throws MIDletStateChangeException {}public void commandAction(Command c, Displayable d){if (c==cmdexit)this.notifyDestroyed();////////////显示新建文件名的窗口////////////else if (c==cmdnewfilename){filename = initdir + date + ".txt";tbxinputfilename.setString(date + ".txt");dis.setCurrent(tbxinputfilename);}//////////新建文件//////////else if (c==cmdnewfilenameok){filename = initdir + tbxinputfilename.getString().trim();try{fconn=(FileConnection) Connector.open(filename,Connector.WRITE);fconn.create();fconn.close();maintbx.setString(date);maintbx.setTitle(tbxinputfilename.getString().trim());}catch (IOException ioe){}dis.setCurrent(maintbx);}///////////编辑文本时删除字符//////////else if (c==cmdback){int position = maintbx.getCaretPosition();maintbx.delete(position-1, 1);}///////////显示文件名///////////else if (c==cmdopen){dis.setCurrent(listfilename);listfilename.setCommandListener(this);listfilename.deleteAll();listfile(initdir);}//////////显示文件内容/////////else if (c==listfilename.SELECT_COMMAND){int i=listfilename.getSelectedIndex();String str=listfilename.getString(i);dis.setCurrent(maintbx);filename=initdir + str;try{fconn=(FileConnection) Connector.open(filename,Connector.READ);InputStream in =fconn.openInputStream();int bytesize = (int) fconn.fileSize();if (bytesize > 1024 ){maintbx.setMaxSize(bytesize);}byte[] b=new byte[bytesize];in.read(b);String s= new String(b,this.getcharset(b)).trim();maintbx.setTitle(str);maintbx.setString(s);in.close();fconn.close();}catch (IOException ioe){}}/////////////保存文件////////////////else if(c==cmdsave){try{fconn=(FileConnection) Connector.open(filename,Connector.READ_WRITE);if (fconn.exists()){ fconn.delete();fconn.create();}OutputStream out =fconn.openOutputStream();String sr = maintbx.getString().trim();int wlength = sr.getBytes("GBK").length;byte [] bw= new byte[wlength];bw=sr.getBytes("GBK");out.write(bw);out.close();fconn.close();}catch (IOException ioe){}}}///////////// 函数区///////////////////////判断文件的字符集////////////public String getcharset(byte[] b){String charset ="GBK";if (b[0] == (byte) 0xFF && b[1] == (byte) 0xFE)charset = "UTF-16LE";else if (b[0] == (byte) 0xFE && b[1] == (byte) 0xFF)charset = "UTF-16BE";else if (b[0] == (byte) 0xEF && b[1] == (byte) 0xBB && b[2] == (byte) 0xBF) charset = "UTF-8";return charset;}////////////取得当前日期//////////public String getdate(){Calendar cal = Calendar.getInstance();int year = cal.get(Calendar.YEAR);int month = cal.get(Calendar.MONTH);int day = cal.get(Calendar.DA TE);int week = cal.get(Calendar.DAY_OF_WEEK);String str = year + "年" + (month+1) + "月" + day + "日" + "星期" + (week-1);return str;}//////////把目录下的文件名添加到列表框///////////public void listfile(String pathname){String str = null;try{fconn = (FileConnection) Connector.open(pathname);Enumeration e1 = fconn.list();while(e1.hasMoreElements()){str=e1.nextElement().toString();listfilename.append(str, null);}fconn.close();}catch (IOException ioe){}}///////////遍历目录////////////public void listfilefull(String pathname){String str = null;try{fconn = (FileConnection) Connector.open(pathname);Enumeration e1 = fconn.list();while(e1.hasMoreElements()){str=e1.nextElement().toString();if (str.endsWith("/")){listfilename.append(pathname + str, null);listfilefull(pathname+str);}else{if (str.endsWith(".txt"))listfilename.append(str, null);}}fconn.close();}catch (IOException ioe){}}}import java.io.*;import java.awt.*;import javax.swing.*;import java.util.Date;import java.awt.event.*;import java.util.Calendar;import java.text.SimpleDateFormat;public class HDG extends JFrame{JMenuBar menub=new JMenuBar();JTextArea text=new JTextArea();JMenu files=new JMenu("文件（F）");JMenu edit=new JMenu("编辑(E)");JMenu formats=new JMenu("格式(O)");JMenu help=new JMenu("帮助(H)");JMenuItem newFile=new JMenuItem("新建(N)");JMenuItem open=new JMenuItem("打开(O)...");JMenuItem save=new JMenuItem("保存(S)");JMenuItem saveAs=new JMenuItem("另存为(A)...");JMenuItem exit=new JMenuItem("退出(X)");JMenuItem cut=new JMenuItem("剪切(T)");JMenuItem copy=new JMenuItem("复制(C)");JMenuItem paste=new JMenuItem("粘贴(P)");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 selectAll=new JMenuItem("全选(A)");JMenuItem timeDate=new JMenuItem("时间/日期(D)");JCheckBoxMenuItem lineWrap=new JCheckBoxMenuItem("自动换行(M)");JMenuItem fonts=new JMenuItem("字体(F)...");JMenuItem color = new JMenuItem("字体颜色(C)...");JMenuItem about=new JMenuItem("关于记事本(A)");JPopupMenu popupMenu = new JPopupMenu();JMenuItem MenuMouseCut = new JMenuItem("剪切(T)");JMenuItem MenuMouseCopy = new JMenuItem("复制(C)");JMenuItem MenuMousePaste = new JMenuItem("粘贴(P)");JMenuItem MenuMouseselectAll = new JMenuItem("全选(A)");JFrame th=this;String name;String openedPath=null;boolean opened=false;boolean reworked=false;HDG(String name){super(name);=name;int x,y;Dimension size=Toolkit.getDefaultToolkit().getScreenSize();x=(size.width-600)/2;y=(size.height-400)/2;setSize(600,400);setLocation(x,y);setMinimumSize(new Dimension(250,150));setDefaultCloseOperation(EXIT_ON_CLOSE);}void init(){files.setMnemonic('F');edit.setMnemonic('E');formats.setMnemonic('O');help.setMnemonic('H');newFile.setMnemonic('N');open.setMnemonic('O');save.setMnemonic('S');saveAs.setMnemonic('A');exit.setMnemonic('X');cut.setMnemonic('T');copy.setMnemonic('C');paste.setMnemonic('P');find.setMnemonic('F');findNext.setMnemonic('N');replace.setMnemonic('R');selectAll.setMnemonic('A');timeDate.setMnemonic('D');lineWrap.setMnemonic('M');fonts.setMnemonic('F');color.setMnemonic('C');about.setMnemonic('A');newFile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MAS K));open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q,InputEvent.CTRL_MASK));cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK));copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK));paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MAS K));timeDate.setAccelerator(KeyStroke.getKeyStroke("F5"));files.add(newFile);files.add(open);files.add(save);files.add(saveAs);files.addSeparator();files.add(exit);edit.addSeparator();edit.add(cut);edit.add(copy);edit.add(paste);edit.addSeparator();edit.add(find);edit.add(findNext);edit.add(replace);edit.addSeparator();edit.add(selectAll);edit.add(timeDate);formats.add(lineWrap);formats.add(fonts);formats.add(color);help.add(about);menub.add(files);menub.add(edit);menub.add(formats);menub.add(help);setJMenuBar(menub);getContentPane().add(new JScrollPane(text));popupMenu.add(MenuMouseCut); popupMenu.add(MenuMouseCopy); popupMenu.add(MenuMousePaste); popupMenu.add(MenuMousePaste); popupMenu.add(MenuMouseselectAll);Listen listen=new Listen();Listen1 listen1=new Listen1();newFile.addActionListener(listen);open.addActionListener(listen);save.addActionListener(listen);saveAs.addActionListener(listen);exit.addActionListener(listen);cut.addActionListener(listen);copy.addActionListener(listen);paste.addActionListener(listen);find.addActionListener(listen);findNext.addActionListener(listen);replace.addActionListener(listen);selectAll.addActionListener(listen);timeDate.addActionListener(listen);lineWrap.addActionListener(listen);fonts.addActionListener(listen);color.addActionListener(listen);about.addActionListener(listen);open.addActionListener(listen1);save.addActionListener(listen1);saveAs.addActionListener(listen1);find.addActionListener(listen1);findNext.addActionListener(listen1);replace.addActionListener(listen1);fonts.addActionListener(listen1);text.addMouseListener(new MouseAdapter(){public void mousePressed(MouseEvent e){checkForTriggerEvent(e);} public void mouseReleased(MouseEvent e){checkForTriggerEvent(e);} private void checkForTriggerEvent(MouseEvent e){if(e.isPopupTrigger()){popupMenu.show(e.getComponent(),e.getX(),e.getY());}}});MenuMouseCut.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){text.cut();}});MenuMouseCopy.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){text.copy();}});MenuMousePaste.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){text.paste();}});MenuMouseselectAll.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){text.selectAll();}});}class Listen implements ActionListener{public void actionPerformed(ActionEvent e){Object source=e.getSource();if(source==newFile){text.setText("");th.setTitle(name);openedPath=null;opened=false;}else if(source==exit){System.exit(0);}else if(source==selectAll)text.selectAll();else if(source==cut)text.cut();else if(source==copy)text.copy();else if(source==paste)text.paste();else if(source==lineWrap)text.setLineWrap(!text.getLineWrap());else if(source==about){JFrame about = new JFrame("记事本");JLabel label1 = new JLabel("自己编写的记事本");JLabel label2 = new JLabel("作者：黄德贵");JLabel label3 = new JLabel("电子邮箱：214783803@");GridBagLayout layout = new GridBagLayout();about.setLayout(layout);GridBagConstraints n1 = new GridBagConstraints();n1.gridx = 0;n1.gridy = 0;n1.gridwidth = 10;n1.gridheight= 10;n1.anchor=GridBagConstraints.WEST;GridBagConstraints n2 = new GridBagConstraints();n2.gridx = 0;n2.gridy = 15;n2.gridwidth = 10;n2.gridheight= 10;n2.anchor=GridBagConstraints.WEST;GridBagConstraints n3 = new GridBagConstraints();n3.gridx = 0;n3.gridy = 25;n3.gridwidth = 10;n3.gridheight= 10;n3.anchor=GridBagConstraints.WEST;layout.setConstraints(label1,n1);layout.setConstraints(label2,n2);layout.setConstraints(label3,n3);about.add(label1);about.add(label2);about.add(label3);about.setSize(200,100);about.setLocation(300,200);about.setVisible(true);about.setResizable(false);}else if(source==timeDate){Date nowTime=new Date();SimpleDateFormat times=new SimpleDateFormat("yyyy年MM月dd日HH:mm");text.insert(times.format(nowTime),text.getCaretPosition());}else if(source==color){Color color=JColorChooser.showDialog(text, "选择颜色", Color.BLACK);text.setForeground(color);}}}class Listen1 implements ActionListener{public void actionPerformed(ActionEvent e){Object source=e.getSource();if(source==open){FileDialog openFile=new FileDialog(th,"打开文件...",FileDialog.LOAD);openFile.setVisible(true);String filePath=openFile.getDirectory()+openFile.getFile();try{FileInputStream fis=new FileInputStream(filePath);byte [] content=new byte[fis.available()];fis.read(content);text.setText(new String(content));text.setCaretPosition(0);if(openFile.getFile()!=null){th.setTitle(openFile.getFile()+name);openedPath=filePath;opened=true;}fis.close();}catch(Exception ex){ex.printStackTrace();}opened=true;}else if(source==save||source==saveAs){String savePath=openedPath;if(savePath==null||source==saveAs){FileDialog saveFile=new FileDialog(th,"保存文件...",FileDialog.SA VE);saveFile.setVisible(true);savePath=saveFile.getDirectory()+saveFile.getFile();}try{FileOutputStream fos=new FileOutputStream(savePath);fos.write(text.getText().getBytes());fos.close();}catch(Exception ex){ex.printStackTrace();}if(source==save)openedPath=savePath;}else if(source==find||source==findNext){JFrame find = new JFrame("查找");JLabel label = new JLabel("查找内容");final JTextField text1 = new JTextField(10);JButton button = new JButton("查找");find.setLayout(new FlowLayout());find.add(label);find.add(text1);find.add(button);find.setSize(300,90);find.setLocation(300,200);find.setVisible(true);find.setResizable(false);button.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){String src=text1.getText();String desc=text.getText();if(desc.indexOf(src)==-1){JFrame result = new JFrame("查找失败");JLabel label= new JLabel("未找到查询结果");result.add(label);result.setSize(300,60);result.setLocation(300,120);result.setVisible(true);result.setResizable(false);}else{ int mark=0;int start=desc.indexOf(src,mark);mark=start+1;if(mark!=0){text.setSelectionStart(start);text.setSelectionEnd(start+src.length());}}}});}else if(source==replace){JFrame replace = new JFrame("替换");JLabel label1 = new JLabel("查找内容：");JLabel label2 = new JLabel(" 替换为：");final JTextField text1 = new JTextField(10);final JTextField text2 = new JTextField(10);JButton button1 = new JButton("替换");JButton button2 = new JButton("全部替换");JPanel p1 = new JPanel();JPanel p2 = new JPanel();JPanel p3 = new JPanel();p1.add(label1);p1.add(text1);p2.add(label2);p2.add(text2);p3.add(button1);p3.add(button2);replace.setLayout(new GridLayout(3,1));replace.add(p1);replace.add(p2);replace.add(p3);replace.setSize(300,120);replace.setLocation(300,200);replace.setVisible(true);replace.setResizable(false);button1.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){String find = text1.getText();String replace = text2.getText();String desc = text.getText();if(desc.indexOf(find)==-1){JFrame result = new JFrame("查找失败");JLabel label= new JLabel("未找到查询结果");result.add(label);result.setSize(300,60);result.setLocation(300,120);result.setVisible(true);result.setResizable(false);}else{text.select(desc.indexOf(find),desc.indexOf(find)+find.length());text.replaceSelection(replace);}}});button2.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){String find = text1.getText();String replace = text2.getText();String desc = text.getText();if(desc.indexOf(find)==-1){JFrame result = new JFrame("查找失败");JLabel label= new JLabel("未找到查询结果");result.add(label);result.setSize(300,60);result.setLocation(300,120);result.setVisible(true);result.setResizable(false);}else{text.setText(text.getText().replaceAll(find,replace));}}});}else if(source==fonts){JTextArea textArea=new JTextArea();JButton ok=new JButton();JButton cancel=new JButton();JComboBox fontName=new JComboBox();JComboBox fontSize=new JComboBox();JComboBox fontStyle=new JComboBox();String[] font = {"宋体" , "黑体" , "Arial","BatangChe","ComicSansMS","Times","Serif","Bitstream Charter","Courier","Luxi Mono","Nimbus Sans L","Utopia"};String[] size = {"8","10","12","14","16","18","20","22","24","26","28","32","36","48","72","96"};String[] style= {"PLAIN","BOLD","ITALIC"};JFrame jf = new JFrame("字体设置");}}}public static void main(String[] args){try{UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName());}catch (Exception e){System.err.println("不能使用该系统的外观和感觉:"+e);}String name=("我自己编写的记事本");HDG note=new HDG(name);note.init();note.setVisible(true);}}//08级软件班有人教我的/*import java.sql.*;public class Query {public static void main(String[] args) throws Exception{Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");Connectioncon=DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;User=sa;Password=;DatabaseName=MyBase");Statement stmt=con.createStatement();ResultSet rs=stmt.executeQuery("select * from stu");while(rs.next()){System.out.print("学号:"+rs.getString("num")+"\t");System.out.println("姓名:"+rs.getString("name"));}rs.close();stmt.close();}}*/。