高级编程：三重DES加密程序(3)

文章作者 100test 发表时间 2007:03:14 16:32:51
来源 100Test.Com百考试题网

/** 文件选择组件。 */ class FilePanel extends JPanel{ FilePanel(String str){ JLabel label = new JLabel(str). JTextField fileText = new JTextField(35). JButton chooseButton = new JButton("浏览..."). this.add(label). this.add(fileText). this.add(chooseButton). clickAction ca = new clickAction(this). chooseButton.addActionListener(ca). } public String getFileName(){ JTextField jtf = (JTextField)this.getComponent(1). return jtf.getText(). } private class clickAction implements ActionListener{ clickAction(Component c){ cmpt = c. } public void actionPerformed(ActionEvent event){ JFileChooser chooser = new JFileChooser(). chooser.setCurrentDirectory(new File(".")). int ret = chooser.showOpenDialog(cmpt). if(ret==JFileChooser.APPROVE_OPTION){ JPanel jp = (JPanel)cmpt. JTextField jtf = (JTextField)jp.getComponent(1). jtf.setText(chooser.getSelectedFile().getPath()). } } private Component cmpt. } } /** 密码生成组件。 */ class KeyPanel extends JPanel{ KeyPanel(String str){ JLabel label = new JLabel(str). JTextField fileText = new JTextField(35). JButton chooseButton = new JButton("随机产生"). this.add(label). this.add(fileText). this.add(chooseButton). clickAction ca = new clickAction(this). chooseButton.addActionListener(ca). } //返回生成的密码（48个字符长度） public String getKey(){ JTextField jtf = (JTextField)this.getComponent(1). return jtf.getText(). } private class clickAction implements ActionListener{ clickAction(Component c){ cmpt = c. } public void actionPerformed(ActionEvent event){ try{ KeyGenerator kg = KeyGenerator.getInstance("DES"). kg.init(56). Key ke = kg.generateKey(). byte[] bytK1 = ke.getEncoded(). ke = kg.generateKey(). byte[] bytK2 = ke.getEncoded(). ke = kg.generateKey(). byte[] bytK3 = ke.getEncoded(). JPanel jp = (JPanel)cmpt. JTextField jtf = (JTextField)jp.getComponent(1). jtf.setText(getByteStr(bytK1) getByteStr(bytK2) getByteStr(bytK3)). }catch(Exception e){ e.printStackTrace(). } } private String getByteStr(byte[] byt){ String strRet = "". for(int i=0.i< byt.length.i ){ //System.out.println(byt[i]). strRet = getHexValue((byt[i]&.240)/16). strRet = getHexValue(byt[i]&.15). } return strRet. } private String getHexValue(int s){ String sRet=null. switch (s){ case 0: sRet = "0".break. case 1: sRet = "1".break. case 2: sRet = "2".break. case 3: sRet = "3".break. case 4: sRet = "4".break. case 5: sRet = "5".break. case 6: sRet = "6".break. case 7: sRet = "7".break. case 8: sRet = "8".break. case 9: sRet = "9".break. case 10: sRet = "A".break. case 11: sRet = "B".break. case 12: sRet = "C".break. case 13: sRet = "D".break. case 14: sRet = "E".break. case 15: sRet = "F". } return sRet. } private Component cmpt. } } 程序运行图：