Java课程设计实验报告.doc

4.4程序代码importjava.awt.*;importjava.awt.event.*;importjava.io.*;importjavax.swing.*;classMyframeextendsFrameimplementsActionListenerFileDialogfiledialog_save,filedialog_load;Buttonbutton1,button2;Labellabel;MenuBarbar;Menumenu;MenuItemitemOpen,itemSave;TextAreatexta;Myframe(Strings)/创建对话框super(s);texta=newTextArea(38,160);button1=newButton(加密);button2=newButton(解密);menu=newMenu(文件);itemOpen=newMenuItem(打开);itemSave=newMenuItem(保存);label=newLabel(文件浏览窗口);itemOpen.addActionListener(this);itemSave.addActionListener(this);button1.addActionListener(this);button2.addActionListener(this);filedialog_save=newFileDialog(this,保存文件对话框,FileDialog.SAVE);filedialog_load=newFileDialog(this,打开文件对话框,FileDialog.LOAD);filedialog_save.addWindowListener(newWindowAdapter()publicvoidwindowClosing(WindowEvente)filedialog_save.setVisible(false););filedialog_load.addWindowListener(newWindowAdapter()publicvoidwindowClosing(WindowEvente)filedialog_load.setVisible(false););Boxbox1=Box.createHorizontalBox();/创建一个从左到右显示其组件的box1;Boxbox2=Box.createVerticalBox();/创建一个从上到下显示其组件的box2Boxbox3=Box.createVerticalBox();Boxboxbase=Box.createVerticalBox();Panelpanel1=newPanel();Panelpanel2=newPanel();setMenuBar(bar=newMenuBar();bar.add(menu);menu.add(itemOpen);menu.add(itemSave);panel1.add(button1);panel1.add(button2);box1.add(panel1);box2.add(label);panel2.add(texta);box3.add(panel2);boxbase.add(box1);boxbase.add(box2);boxbase.add(box3);add(boxbase);setLayout(newFlowLayout();setBounds(100,0,1200,750);setVisible(true);addWindowListener(newWindowAdapter()publicvoidwindowClosing(WindowEvente)System.exit(0););/“关闭”窗口事件;publicvoidactionPerformed(ActionEvente)/查找读入文件if(e.getSource()=itemOpen)filedialog_load.setVisible(true);texta.setText(null);Strings;if(filedialog_load.getFile()!=null)tryFilefile=newFile(filedialog_load.getDirectory(),filedialog_load.getFile();FileReaderfile_reader=newFileReader(file);/读取字符流BufferedReaderin=newBufferedReader(file_reader);while(s=in.readLine()!=null)texta.append(s+n);in.close();file_reader.close();catch(IOExceptione1)if(e.getSource()=itemSave)/查找写入的文件filedialog_save.setVisible(true);if(filedialog_save.getFile()!=null)tryFilefile=newFile(filedialog_save.getDirectory(),filedialog_save.getFile();FileWritertofile=newFileWriter(file);/读取字符流BufferedWriterout=newBufferedWriter(tofile);out.write(texta.getText(),0,(texta.getText().length();out.close();tofile.close();catch(IOExceptione2)if(e.getSource()=button1)chara=texta.getText().toCharArray();/*把texta中获得的文本，进行初始化，与原字符串长度相等，并将该字符串对象的全部字符复制到该数组a中*/texta.setText(null);intn;charsecret=;for(inti=0;ia.length;i+)charc=(char)(secretai);/进行异或运算texta.append(+c);if(e.getSource()=button2)chara=texta.getText().toCharArray();texta.setText(null);intn;charsecret=;for(inti