JAVA程序设计“txt文件保密程序”.doc

JAVA程序设计“txt文件保密程序”一、程序代码package Protecter;import java.io.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.filechooser.FileFilter;import java.io.File;import java.util.*;class ProtecterJFrame extends JFrame implements ActionListener private static final long serialVersionUID = 1L;public ProtecterJFrame(String tName)super(tName);private JMenuItem jmi,jmiExit,jmiAbout;private File getPath;private JButton b1,b2,b3,jb1,jb2;private JTable jTable;private VectorVector rowData=new VectorVector();private Vector columnNames=new Vector();public void setWindow()Container c=getContentPane();JMenuBar jmb=new JMenuBar();JMenu jm,jmHelp;jm=new JMenu(文件);jmHelp=new JMenu(帮助);jmi=new JMenuItem(打开);jmi.setActionCommand(添加);jmi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK);jmiExit= new JMenuItem(退出);jmiExit.setActionCommand(退出);jmiAbout=new JMenuItem(关于);jmiAbout.setActionCommand(关于);jm.add(jmi);jm.addSeparator();jm.add(jmiExit);jmHelp.add(jmiAbout);jmb.add(jm);jmb.add(jmHelp);JPanel jp=new JPanel(new BorderLayout();JPanel jp1=new JPanel(new FlowLayout();b1=new JButton(添加文件);b1.setActionCommand(添加);b2=new JButton(撤消文件);b2.setActionCommand(撤消);b3=new JButton(显示文件);b3.setActionCommand(显示);jp1.add(b1);jp1.add(b2);jp1.add(b3);String column=编号,地址,大小（字节）;for(int i=0;icolumn.length;i+)columnNames.add(columni);jTable=new JTable(rowData,columnNames)private static final long serialVersionUID =1L;public boolean isCellEditable(int row, int column) return false;jTable.setRowHeight(25);JPanel jp2=new JPanel(new GridLayout();jp2.add(new JScrollPane(jTable);JPanel jp3=new JPanel(new FlowLayout();jb1=new JButton(加密);jb1.setActionCommand(加密);jb2=new JButton(解密);jb2.setActionCommand(解密);jp3.add(jb1);jp3.add(jb2);jp.add(jp1,BorderLayout.NORTH);jp.add(jp2,BorderLayout.CENTER);jp.add(jp3,BorderLayout.SOUTH);c.add(jp);this.setJMenuBar(jmb);this.setBounds(400,200,500,300);this.setResizable(false);this.setVisible(true);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);public void listenActions()b1.addActionListener(this);b2.addActionListener(this);b3.addActionListener(this);jb1.addActionListener(this);jb2.addActionListener(this);jmi.addActionListener(this);jmiExit.addActionListener(this);jmiAbout.addActionListener(this);public boolean getFileAddress()JFileChooser fileCh=new JFileChooser();fileCh.setCurrentDirectory(new File(.);fileCh.setMultiSelectionEnabled(true);fileCh.setFileFilter(new FileFilter()public boolean accept(File f)return f.getName().toLowerCase().endsWith(.txt)|f.isDirectory();public String getDescription()return 文本文档 *.txt*;);if(fileCh.showOpenDialog(null)=JFileChooser.CANCEL_OPTION)return false;getPath=fileCh.getSelectedFiles();return true;public void addRow(File filePath)Vector row=new Vector(3);int last=jTable.getRowCount()-1;int no=last0?1:(Integer.parseInt(+rowData.get(last).get(0)+1);row.add(+no);row.add(+filePath);row.add(+filePath.length();rowData.add(row);public void transposition(int a)int temp;for(int i=0;ia.length/2;i+)temp=ai;ai=aa.length-1-i;aa.length-1-i=temp;public void removeRows()int x=new intjTable.getSelectedRowCount();x=jTable.getSelectedRows();transposition(x);for(int i=0;ix.length;i+)rowData.remove(xi);if(!rowData.isEmpty()jTable.setRowSelectionInterval(0,0);public void showFiles()int a=new intjTable.getSelectedRowCount();a=jTable.getSelectedRows();int x=500,y=300;for(int j=0;ja.length;j+)File filePath=new File(+rowData.get(aj).get(1);String fileWords = ;tryBufferedReader brf = new BufferedReader(new InputStreamReader(new FileInputStream(filePath); String str=brf.readLine();while(str!=null)fileWords=fileWords+str+rn;str=brf.readLine();catch(IOException e)e.printStackTrace();JFrame text=new JFrame(filePath.getName();JPanel textJp=new JPanel(new GridLayout();JTextArea textArea=new JTextArea();textArea.setEditable(false);textArea.setText(fileWords);textJp.add(new JScrollPane(textArea);text.add(textJp);text.setBounds(x,y,500,300);text.setVisible(true);text.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);x+=20;y+=20;private static final String mark=/*PrinceChen*/;public void encryption()for(int j=0;jjTable.getRowCount();j+)File filePath=new File(+rowData.get(j).get(1);tryBufferedReader brf = new BufferedReader(new InputStreamReader(new FileInputStream(filePath); String strLine=brf.readLine();String fileWords=;String lastLine=;while(strLine!=null)fileWords=fileWords+strLine+rn;lastLine=strLine;strLine=brf.readLine();if(lastLine.startsWith(mark)continue;StringBuffer file=new StringBuffer(fileWords);for(int i=0;ifile.length();i+)char ch=fileWords.charAt(i);if(ch!=r)ch+=11; file.setCharAt(i,ch);elsei+=1;fileWords=new String(file);fileWords+=mark;filePath.setWritable(true);FileOutputStream fileO=new FileOutputStream(filePath);ObjectOutputStream os=new ObjectOutputStream(fileO);os.writeObject(fileWords);os.close();filePath.setReadOnly();catch(IOException e)e.printStackTrace();public void deciphering()for(int j=0;jjTable.getRowCount();j+)File filePath=new File(+rowData.get(j).get(1);tryBufferedReader brf = new BufferedReader(new InputStreamReader(new FileInputStream(filePath); String strLine=brf.readLine();String lastLine=;while(strLine!=null)lastLine=strLine;strLine=brf.readLine();if(!lastLine.startsWith(mark)continue;FileInputStream fileI=new FileInputStream(filePath);ObjectInputStream IS=new ObjectInputStream(fileI);String strFile=null;trystrFile=(String)IS.readObject();IS.close();catch(ClassNotFoundException e)e.printStackTrace();StringBuffer fileWords=new StringBuffer(strFile);int first=fileWords.indexOf(mark);fileWords.delete(first,first+mark.length();for(int i=0;ifileWords.length();i+)char ch=fileWords.charAt(i);if(ch!=r)ch-=11; fileWords.setCharAt(i,ch);elsei+=1;filePath.setWritable(true);FileOutputStream f=new FileOutputStream(filePath);PrintWriter pw=new PrintWriter(f,true);pw.print(fileWords);pw.close();catch(IOException e)e.printStackTrace();public void actionPerformed(ActionEvent e)String strAction=e.getActionCommand();if(strAction=添加)if(getFileAddress()for(int i=0;igetPath.length;i+)String path;int j;for(j=0;j=jTable.getRowCount()addRow(getPathi);jTable.updateUI();else if(strAction=撤消&!rowData.isEmpty()if(jTable.getSelectedRowCount()=0)JOptionPane.showMessageDialog(null,请选中要撤消的行！,提示,JOptionPane.INFORMATION_MESSAGE);elseint select=JOptionPane.showConfirmDialog(null,确定撤消选中行吗?,撤消,JOptionPane.OK_CANCEL_OPTION,JOptionPane.PLAIN_MESSAGE);if(select=JOptionPane.OK_OPTION)removeRows();jTable.updateUI();else if(strAction=显示&!rowData.isEmpty()if(jTable.getSelectedRowCount()=0)JOptionPane.showMessageDialog(null,请选中要显示的行！,提示,JOptionPane.INFORMATION_MESSAGE);elseshowFiles();else if(strAction=加密)if(jTable.getRowCount()=0)JOp