用JAVA语言编写的文本编辑器

 在网上查了一下，好多同学都在找用JAVA语言编写的简单文本编辑器的源代码。这可能是我们在学习JAVA中老师要求做的惯例吧。所以我在这发个我自己个人今天写出来的给大家参考参考。每个人都有自己的想法，当然我不敢说我的是最好的，但是参考价值还是有的：import java.awt.BorderLayout; import java.awt.Button; import java.awt.Dialog; import java.awt.FileDialog; import java.awt.FlowLayout; import java.awt.Font; import java.awt.Frame; import java.awt.GridLayout; import java.awt.Label; import java.awt.List; import java.awt.Menu; import java.awt.MenuBar; import java.awt.MenuItem; import java.awt.MenuShortcut; import java.awt.Panel; import java.awt.TextArea; import java.awt.Toolkit; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.StringSelection; import java.awt.datatransfer.Transferable; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.TextEvent; import java.awt.event.TextListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import javax.swing.undo.UndoManager; public class Txt extends Frame implements ActionListener,TextListener { private static final long serialVersionUID = 1L; //*****************初始化工作************** MenuBar menuBar; Menu menuFile,menuEdi,menuFormat,menuHelp; MenuItem menuItemNew,menuItemOpen,menuItemSave,menuItemOsave,menuItemExit, menuItemCut,menuItemCopy,menuItemPase,menuItemDel,menuItemSelectAll, menuItemFont,menuItemAbout; TextArea textArea; FileDialog fileOpen,fileSave; String temp,fileName; MyDialog myDialog; boolean change=false; TextClipboard cb; UndoManager undoManager=new UndoManager(); public Txt() { super("文本编辑器"); this.setBounds(200, 200, 400, 300); menuBar=new MenuBar(); textArea=new TextArea(); textArea.addTextListener(this); menuFile=new Menu("文件(F)"); menuItemNew=new MenuItem("新建(N)"); menuItemNew.setShortcut(new MenuShortcut(KeyEvent.VK_N)); menuItemNew.addActionListener(this); menuItemOpen=new MenuItem("打开(O)..."); menuItemOpen.setShortcut(new MenuShortcut(KeyEvent.VK_O)); menuItemOpen.addActionListener(this); menuItemSave=new MenuItem("保存(S)"); menuItemSave.setShortcut(new MenuShortcut(KeyEvent.VK_S)); menuItemSave.addActionListener(this); menuItemOsave=new MenuItem("另存为(A)..."); menuItemOsave.addActionListener(this); menuItemExit=new MenuItem("退出(X)"); menuItemExit.addActionListener(this); menuItemExit.setShortcut(new MenuShortcut(KeyEvent.VK_E)); menuFile.add(menuItemNew); menuFile.add(menuItemOpen); menuFile.add(menuItemSave); menuFile.add(menuItemOsave); menuFile.addSeparator(); menuFile.add(menuItemExit); menuEdi=new Menu("编辑(E)"); menuItemCut=new MenuItem("剪切(T)"); menuItemCut.setShortcut(new MenuShortcut(KeyEvent.VK_X)); menuItemCut.addActionListener(this); menuItemCopy=new MenuItem("复制(C)"); menuItemCopy.setShortcut(new MenuShortcut(KeyEvent.VK_C)); menuItemCopy.addActionListener(this); menuItemPase=new MenuItem("粘帖(P)"); menuItemPase.setShortcut(new MenuShortcut(KeyEvent.VK_V)); menuItemPase.addActionListener(this); menuItemDel=new MenuItem("删除(L)"); menuItemDel.addActionListener(this); menuItemSelectAll=new MenuItem("全选(A)"); menuItemSelectAll.setShortcut(new MenuShortcut(KeyEvent.VK_A)); menuItemSelectAll.addActionListener(this); menuEdi.add(menuItemCut); menuEdi.add(menuItemCopy); menuEdi.add(menuItemPase); menuEdi.add(menuItemDel); menuEdi.addSeparator(); menuEdi.add(menuItemSelectAll); menuFormat=new Menu("格式(O)"); menuItemFont=new MenuItem("字体..."); menuItemFont.addActionListener(this); menuFormat.add(menuItemFont); menuHelp=new Menu("帮助(H)"); menuItemAbout=new MenuItem("关于记事本"); menuItemAbout.addActionListener(this); menuHelp.add(menuItemAbout); menuBar.add(menuFile); menuBar.add(menuEdi); menuBar.add(menuFormat); menuBar.add(menuHelp); fileName=""; myDialog=new MyDialog(this, "保存文件？", true); fileSave=new FileDialog(this,"保存文件",FileDialog.SAVE); fileSave.setBounds(200, 200, 400, 300); fileOpen=new FileDialog(this,"打开文件",FileDialog.LOAD); fileOpen.setBounds(200, 200, 400, 300); cb=new TextClipboard(); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent arg0) { if(fileName!="") { if(change==false) System.exit(0); if(change==true) { save(fileName); System.exit(0); } } if(fileName=="") { if(change==false) System.exit(0); if(change==true) { myDialog.setVisible(true); if(myDialog.getMessage()==MyDialog.YES) { fileSave.setVisible(true); fileName=fileSave.getDirectory()+"//"+fileSave.getFile(); save(fileName); System.exit(0); } if(myDialog.getMessage()==MyDialog.NO) System.exit(0); } } } }); this.setMenuBar(menuBar); this.add(textArea); this.setVisible(true); } //*****************办法************** public void open(String path) { try { FileReader file=new FileReader(path); BufferedReader read=new BufferedReader(file); StringBuffer sb=new StringBuffer(); while((temp=read.readLine())!=null) sb.append(temp+'/n'); textArea.setText(sb.toString()); file.close(); read.close(); } catch (Exception e) { } } public void save(String path) { try{ FileWriter file=new FileWriter(path); BufferedWriter bw=new BufferedWriter(file); bw.write(textArea.getText()); bw.close(); } catch(Exception e) { } } //*****************事件监听器************** public void textValueChanged(TextEvent arg0) { change=true; } public void actionPerformed(ActionEvent e) { if(e.getSource()==menuItemNew) { if(fileName!="") { save(fileName); textArea.setText(""); } if(fileName==""&&change==true) { fileSave.setVisible(true); fileName=fileSave.getDirectory()+"//"+fileSave.getFile(); save(fileName); textArea.setText(""); } else { textArea.setText(""); fileName=""; } } if(e.getSource()==menuItemOpen) { fileOpen.setVisible(true); fileName=fileOpen.getDirectory()+"//"+fileOpen.getFile(); open(fileName); } if(e.getSource()==menuItemSave) { if(fileName!="") save(fileName); else { fileSave.setVisible(true); fileName=fileSave.getDirectory()+"//"+fileSave.getFile(); save(fileName); } } if(e.getSource()==menuItemOsave) { fileSave.setVisible(true); fileName=fileSave.getDirectory()+"//"+fileSave.getFile(); save(fileName); } if(e.getSource()==menuItemExit) { if(fileName!="") { if(change==false) System.exit(0); if(change==true) { save(fileName); System.exit(0); } } if(fileName=="") { if(change==false) System.exit(0); if(change==true) { myDialog.setVisible(true); if(myDialog.getMessage()==MyDialog.YES) { fileSave.setVisible(true); fileName=fileSave.getDirectory()+"//"+fileSave.getFile(); save(fileName); System.exit(0); } if(myDialog.getMessage()==MyDialog.NO) System.exit(0); } } } if(e.getSource()==menuItemCut) { cb.setData(textArea.getSelectedText()); textArea.replaceRange("", textArea.getSelectionStart(), textArea.getSelectionEnd()); } if(e.getSource()==menuItemCopy) { cb.setData(textArea.getSelectedText()); } if(e.getSource()==menuItemPase) { textArea.replaceRange(cb.getData(), textArea.getSelectionStart(), textArea.getSelectionEnd()); } if(e.getSource()==menuItemDel) { textArea.replaceRange("", textArea.getSelectionStart(), textArea.getSelectionEnd()); } if(e.getSource()==menuItemSelectAll) { textArea.selectAll(); } if(e.getSource()==menuItemFont) { SetFont setfont=new SetFont(this,"字体设置",true); setfont.setVisible(true); textArea.setFont(setfont.myFont); } if(e.getSource()==menuItemAbout) { DialogAbout diaAbout=new DialogAbout(this,"关于文本编辑器",true); diaAbout.setVisible(true); } } public static void main(String[] args) { new Txt(); } } //*****************保存提示框类************** class MyDialog extends Dialog implements ActionListener { /** * */ private static final long serialVersionUID = 1L; static final int YES = 1, NO = 0; int message = -1; Button yes, no; MyDialog(Frame f, String s, boolean b) { super(f, s, b); yes = new Button("保存文件"); yes.addActionListener(this); no = new Button("不保存并退出"); no.addActionListener(this); setLayout(new FlowLayout()); add(yes); add(no); setBounds(300, 300, 200, 80); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { message = -1; setVisible(false); } }); } public void actionPerformed(ActionEvent e) { if (e.getSource() == yes) { message = YES; setVisible(false); } else if (e.getSource() == no) { message = NO; setVisible(false); } } public int getMessage() { return message; } } //*****************关于对话框类************** class DialogAbout extends Dialog implements ActionListener { private static final long serialVersionUID = 1L; Button button; Label l; DialogAbout(Frame f, String s, boolean b) { super(f,s,b); setLayout(new FlowLayout()); button=new Button("了解"); l=new Label("菜鸟级人物编写--LECYKX"); button.addActionListener(this); add(l); add(button); setBounds(300, 300, 200, 100); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { setVisible(false); } }); } public void actionPerformed(ActionEvent e) { if(e.getSource()==button) { setVisible(false); } } } //*****************剪切板类************** class TextClipboard { private Clipboard cb; public TextClipboard(){ cb=Toolkit.getDefaultToolkit().getSystemClipboard(); } public void setData(String data){ cb.setContents(new StringSelection(data),null); } public String getData(){ Transferable content=cb.getContents(null); try{ return (String) content.getTransferData(DataFlavor.stringFlavor); }catch(Exception e){} return null; } } //*****************字体设置类************** class SetFont extends Dialog implements ActionListener { private static final long serialVersionUID = 1L; Panel p1,p2,p3; Label labelName,labelStyle,labelSize; List listName,listStyle,listSize; Button yes; Font myFont; SetFont(Frame f, String s, boolean b) { super(f,s,b); this.setBounds(250, 250, 420, 180); this.setLayout(new BorderLayout()); p1=new Panel(); p1.setLayout(new GridLayout(1,3)); labelName=new Label("字体(F):",Label.LEFT); labelStyle=new Label("字形(Y):",Label.LEFT); labelSize=new Label("大小(S):",Label.LEFT); p1.add(labelName); p1.add(labelStyle); p1.add(labelSize); listName=new List(4); listName.add("宋体"); listName.add("黑体"); listName.add("华文行楷"); listName.add("华文新魏"); listName.add("楷体"); listName.add("隶书"); listName.select(0); listStyle=new List(4); listStyle.add("常规"); listStyle.add("粗体"); listStyle.add("斜体"); listStyle.add("粗体斜体"); listName.select(0); listSize=new List(4); listSize.add("8"); listSize.add("9"); listSize.add("10"); listSize.add("11"); listSize.add("12"); listSize.add("14"); listSize.add("16"); listSize.add("18"); listSize.add("20"); listSize.select(4); p2=new Panel(); p2.add(listName); p2.add(listStyle); p2.add(listSize); p3=new Panel(); yes=new Button("确定"); yes.addActionListener(this); p3.add(yes); this.add(p1,BorderLayout.NORTH); this.add(p2,BorderLayout.CENTER); this.add(p3,BorderLayout.SOUTH); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { setVisible(false); } }); } public Font getFont() { int style=Font.PLAIN;; int size=Integer.parseInt(listSize.getSelectedItem()); if(listStyle.getSelectedIndex()==0) style=Font.PLAIN; if(listStyle.getSelectedIndex()==1) style=Font.BOLD; if(listStyle.getSelectedIndex()==2) style=Font.ITALIC; if(listStyle.getSelectedIndex()==3) style=(Font.BOLD|Font.ITALIC); return myFont=new Font(listName.getSelectedItem(),style,size); } public void actionPerformed(ActionEvent e) { if(e.getSource()==yes) { this.getFont(); this.setVisible(false); } } }