简单Java仿windows记事本.doc

主程序：import java.awt.*;import java.awt.datatransfer.*;import java.awt.event.*;import javax.print.*;import javax.print.attribute.DocAttributeSet;import javax.print.attribute.HashDocAttributeSet;import javax.print.attribute.HashPrintRequestAttributeSet;import javax.print.attribute.PrintRequestAttributeSet;import javax.print.attribute.standard.MediaSizeName;import javax.swing.*;import javax.swing.border.BevelBorder;import javax.swing.event.UndoableEditEvent;import javax.swing.event.UndoableEditListener;import javax.swing.filechooser.*;import javax.swing.filechooser.FileFilter;import javax.swing.plaf.FileChooserUI;import javax.swing.undo.UndoableEdit;import java.io.*;public class Notepad extends JFrame /* * param args */public JTextArea jta=null; /中间的文本区域private File selectedFile=null;private JFileChooser chooser=null; /文件选择器private UndoableEdit edit; /设置还原功能private boolean canUndo=false;private JMenuItem jmiUndoItem; /撤销的菜单private Clipboard clip=null; /粘贴板private JDialog jdSearchDialog;public Notepad()super(Notepad Beta);super.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);chooser=new JFileChooser();chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);clip=Toolkit.getDefaultToolkit().getSystemClipboard();jta=new JTextArea();jta.setWrapStyleWord(true);jta.setLineWrap(true);/*右键弹出功能final JPopupMenu jpMenu=new JPopupMenu();JMenuItem jpItemUndo=new JMenuItem(撤销(U) );JMenuItem jpItemCut=new JMenuItem(剪切(T) );JMenuItem jpItemCopy=new JMenuItem(复制(C) );JMenuItem jpItemPaste=new JMenuItem(粘贴(P) );jpMenu.add(jpItemUndo);jpMenu.add(new JPopupMenu.Separator();jpMenu.add(jpItemCut);jpMenu.add(jpItemCopy);jpMenu.add(jpItemPaste);jpMenu.setBorder(new BevelBorder(BevelBorder.RAISED);jta.addMouseListener(new MouseAdapter() public void mouseClicked(MouseEvent e)if(e.isMetaDown()if(!jpMenu.isVisible()jpMenu.show(e.getComponent(),e.getX(),e.getY();else jpMenu.setVisible(false););/*实现撤销功能jta.getDocument().addUndoableEditListener(new UndoableEditListener() Overridepublic void undoableEditHappened(UndoableEditEvent e) / TODO Auto-generated method stubedit=e.getEdit();if(edit!=null)canUndo=edit.canUndo();else canUndo=false;);/*设置相关菜单和事件监听Container content=getContentPane();JMenuBar jmb=new JMenuBar();JMenu jmFile=new JMenu(文件(F);jmFile.setMnemonic(f);JMenu jmEdit=new JMenu(编辑(E);jmEdit.setMnemonic(e);JMenu jmStyle=new JMenu(格式(O);jmStyle.setMnemonic(e);JMenu jmView=new JMenu(查看(V);jmView.setMnemonic(v);JMenu jmHelp=new JMenu(帮助(H);jmHelp.setMnemonic(h);jmb.add(jmFile);jmb.add(jmEdit);jmb.add(jmStyle);jmb.add(jmView);jmb.add(jmHelp);setJMenuBar(jmb);JMenuItem jmiNewItem=new JMenuItem(新建(N) Ctrl+N);jmiNewItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubif(!jta.getText().equals()int confirm=JOptionPane.showConfirmDialog(Notepad.this, 是否保存(S) Ctrl+S文件？);if(confirm=JOptionPane.OK_OPTION)if(selectedFile!=null)try FileWriter fw=new FileWriter(selectedFile);fw.write(jta.getText();fw.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件写入异常);jta.setText();elsejta.setText();JFileChooser jChooser=new JFileChooser();int selection=jChooser.showSaveDialog(Notepad.this);if(selection=JFileChooser.APPROVE_OPTION)selectedFile=jChooser.getSelectedFile();try FileWriter fw=new FileWriter(selectedFile);fw.write(jta.getText();fw.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件写入异常);else if(confirm=JOptionPane.NO_OPTION)jta.setText();else else );JMenuItem jmiOpenItem=new JMenuItem(打开(O) Ctrl+O);jmiOpenItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubif(!jta.getText().equals()int confirm=JOptionPane.showConfirmDialog(Notepad.this, 是否保存(S) Ctrl+S文件？);if(confirm=JOptionPane.OK_OPTION)if(selectedFile!=null)try FileWriter fw=new FileWriter(selectedFile);fw.write(jta.getText();fw.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件写入异常);elseJFileChooser jChooser=new JFileChooser();int selection=jChooser.showSaveDialog(Notepad.this);if(selection=JFileChooser.APPROVE_OPTION)selectedFile=jChooser.getSelectedFile();try FileWriter fw=new FileWriter(selectedFile);fw.write(jta.getText();fw.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件写入异常);else if(confirm=JOptionPane.NO_OPTION)jta.setText();JFileChooser jChooser=new JFileChooser();int selection=jChooser.showOpenDialog(Notepad.this);if(selection=JFileChooser.APPROVE_OPTION)selectedFile=jChooser.getSelectedFile();try BufferedReader bf=new BufferedReader(new FileReader(selectedFile);String tempString=;int i;while(i=bf.read()!=-1)tempString+=String.valueOf(char)i);jta.setText(tempString);bf.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件保存(S) Ctrl+S错误);else else elseJFileChooser jChooser=new JFileChooser();int selection=jChooser.showOpenDialog(Notepad.this);if(selection=JFileChooser.APPROVE_OPTION)selectedFile=jChooser.getSelectedFile();try BufferedReader bf=new BufferedReader(new FileReader(selectedFile);String tempString=;int i;while(i=bf.read()!=-1)tempString+=String.valueOf(char)i);jta.setText(tempString);bf.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件打开(O) Ctrl+O错误);else );JMenuItem jmiSaveItem=new JMenuItem(保存(S) Ctrl+S);jmiSaveItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubif(jta.getText().equals() elseif(selectedFile=null)JFileChooser jChooser=new JFileChooser();int selection=jChooser.showOpenDialog(Notepad.this);if(selection=JFileChooser.APPROVE_OPTION)selectedFile=jChooser.getSelectedFile();try BufferedReader bf=new BufferedReader(new FileReader(selectedFile);String tempString=;int i;while(i=bf.read()!=-1)tempString+=String.valueOf(char)i);jta.setText(tempString);bf.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件打开(O) Ctrl+O错误);else elsetry FileWriter fw=new FileWriter(selectedFile);fw.write(jta.getText();fw.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件写入异常););JMenuItem jmiSaveTo = new JMenuItem(另存为(A).);jmiSaveTo.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubJFileChooser jChooser=new JFileChooser();int selection=jChooser.showOpenDialog(Notepad.this);if(selection=JFileChooser.APPROVE_OPTION)selectedFile=jChooser.getSelectedFile();try BufferedWriter bf=new BufferedWriter(new FileWriter(selectedFile);bf.write(jta.getText();bf.close(); catch (Exception e) / TODO: handle exceptionJOptionPane.showConfirmDialog(Notepad.this, 文件打开(O) Ctrl+O错误);else );JMenuItem jmiExitItem=new JMenuItem(退出(X);jmiExitItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubif(jta.getText().equals()System.exit(0);elseint t=JOptionPane.showConfirmDialog(Notepad.this, 确定退出(X)？);if(t=JOptionPane.OK_OPTION)System.exit(0););JMenuItem jmiPrintItem = new JMenuItem(打印(P) Ctrl+P);jmiPrintItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stub DocFlavor flavor = DocFlavor.INPUT_STREAM.AUTOSENSE; PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet(); aset.add(MediaSizeName.ISO_A4); PrintService pservices = PrintServiceLookup.lookupPrintServices(flavor, aset); PrintService defaultService=PrintServiceLookup.lookupDefaultPrintService(); if (pservices.length 0) PrintService service = ServiceUI.printDialog(null, 200, 200, pservices, defaultService, flavor, aset); DocPrintJob pj = service.createPrintJob(); try String fis=jta.getText(); DocAttributeSet das = new HashDocAttributeSet(); Doc doc = new SimpleDoc(fis, flavor, das); pj.print(doc, aset); catch (PrintException e) e.printStackTrace(); );jmFile.add(jmiNewItem);jmFile.add(jmiOpenItem);jmFile.add(jmiSaveItem);jmFile.add(jmiSaveTo);jmFile.add(new JSeparator();jmFile.add(jmiPrintItem);jmFile.add(new JSeparator();jmFile.add(jmiExitItem);/*实现编辑菜单的相关item/*由于item太多，就放在一个类中实现监听（除了jmiUndoItem）jmiUndoItem = new JMenuItem(撤销(U) Ctrl+Z);jmiUndoItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubif(canUndo)jmiUndoItem.setEnabled(true);edit.undo();else jmiUndoItem.setEnabled(false););JMenuItem jmiCutItem = new JMenuItem(剪切(T) Ctrl+T);jmiCutItem.addActionListener(new EditListener();JMenuItem jmiCopyItem = new JMenuItem(复制(C) Ctrl+C);jmiCopyItem.addActionListener(new EditListener();JMenuItem jmiPasteItem = new JMenuItem(粘贴(P) Ctrl+V);jmiPasteItem.addActionListener(new EditListener();JMenuItem jmiDeleteItem = new JMenuItem(删除(L) Del);jmiDeleteItem.addActionListener(new EditListener();JMenuItem jmiSearchItem = new JMenuItem(查找(F) Ctrl+F);jmiSearchItem.addActionListener(new EditListener();JMenuItem jmiSearchNextItem = new JMenuItem(查找下一个(N) F3);jmiSearchNextItem.addActionListener(new EditListener();JMenuItem jmiReplaceItem = new JMenuItem(替换);jmiReplaceItem.addActionListener(new EditListener();JMenuItem jmiGoToItem = new JMenuItem(转到);jmiGoToItem.addActionListener(new EditListener();JMenuItem jmiSelectAllItem = new JMenuItem(全选);jmiSelectAllItem.addActionListener(new EditListener();JMenuItem jmiDateItem = new JMenuItem(日期);jmiDateItem.addActionListener(new EditListener();jmEdit.add(jmiUndoItem);jmEdit.add(new JSeparator();jmEdit.add(jmiCutItem);jmEdit.add(jmiCopyItem);jmEdit.add(jmiPasteItem);jmEdit.add(jmiDeleteItem);jmEdit.add(new JSeparator();jmEdit.add(jmiSearchItem);jmEdit.add(jmiSearchNextItem);jmEdit.add(jmiReplaceItem);jmEdit.add(jmiGoToItem);jmEdit.add(new JSeparator();jmEdit.add(jmiSelectAllItem);jmEdit.add(jmiDateItem);/*风格菜单的实现JCheckBox jcbAutoNextLine=new JCheckBox(自动换行);JMenuItem jmiFontitemItem = new JMenuItem(字体);jmStyle.add(jcbAutoNextLine);jmStyle.add(jmiFontitemItem);JMenuItem jmiViewStatusItem = new JMenuItem(查看状态栏);jmiViewStatusItem.setEnabled(false);jmView.add(jmiViewStatusItem);JMenuItem jmiAboutItem=new JMenuItem(关于);jmiAboutItem.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) / TODO Auto-generated method stubnew HelpDialog(Notepad.this););/*帮助菜单jmHelp.add(jmiAboutItem);setLayout(new BorderLayout();JScrollPane jsp=new JScrollPane(jta);jsp.requestFocus(true);content.add(jsp,BorderLayout.CENTER);public static void main(String args) throws Exception/ TODO Auto-generated method stubtry UIManager.setLookAndFeel(com.sun.java.swing.plaf.windows.WindowsLookAndFeel); catch (Exception e) System.out.print(Look And Feel Exception);System.exit(0);/ TODO: handle exceptionJFrame frame=new Notepad();frame.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e)int r=JOptionPane.showConfirmDialog(null, 确认退出吗？);if(r=JOptionPane.OK_OPTION)System.exit(0););frame.setSize(1000,500);frame.setLocationRelativeTo(null);frame.setVisible(true);/*和剪贴板相关函数的实现public String getClipbordContent(Clipboard clip) throws ExceptionTransferable trans = clip.getContents(null); if(trans!=null)if(trans.isDataFlavorSupported(DataFlavor.stringFlavor)return (String)trans.getTransferData(DataFlavor.stringFlavor);else return ;else return ;public void setClipbordContent(Clipboard clip,String str) throws ExceptionTransferable trans=new StringSelection(str);clip.setContents(trans, null);/*监听编辑菜单下item的事件class EditListener implements ActionListenerprivate String tempString=;String textString=jta.getText();String searchString=;int stringLength=0;int startPos;JTextField jtField=null;Overridepublic void actionPerformed(ActionEvent e) / TODO Auto-generated method stubif(e.getActionCommand().equals(剪切(T) Ctrl+T)tempString=jta.getSelectedText();try setClipbordContent(clip, tempString); catch (Exception e1) / TODO Auto-generated catch blocke1.printStackTrace();jta.replaceSelection();else if (e.getActionCommand().equals(复制(C) Ctrl+C) tempString=jta.getSelectedText();try setClipbordContent(clip, tempString); catch (Exception e2) / TODO: handle exceptione2.printStackTrace();else if (e.getActionCommand().equals(粘贴(P) Ctrl+V) try tempString=getClipbordContent(clip); catch (Exception e1) / TODO Auto-generated catch blocke1.printStackTrace();int pos=jta.getCaretPosition();jta.insert(tempString, pos);else if (e.getActionCommand().equals(删除(L) Del) jta.replaceSelection();else if (e.getActionCommand().equals(查找(F) Ctrl+F) jdSearchDialog=new JDialog(Notepad.this,查找);Container content=jdSearchDialog.getContentPane();JLabel jl=new JLabel(查找内容：);jtField=new JTextField(20);jtField.requestFocus();JButton jbt1=new JButton(查找);jbt1.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent arg0) / TODO Auto-generated method stubsearchString=jtField.getText();stringLength=searchString.length();if(stringLength0)startPos=jta.getText().indexOf(searchString);if(startPos=0)jta.select(startPos, startPos+stringLength);else JOptionPane.showConfirmDialog(Notepad.this, 找不到+searchString+);else JOptionPane.showConfirmDialog(Notepad.this, 请输入查找内容););JPanel jp1=new JPanel(new BorderLayout(3,1);jp1.add(jl,BorderLayout