小贝子编程

读取 Java 中的所有文件夹并继续操作



这个Java解密（AES128）工作，但我有两个问题：

  1. 每当文件损坏时，其余文件都不会解密。（如果有 10 个文件，并且文件编号 4 已损坏，则不会解密文件 5-10。
  2. 如何读取文件夹中的所有文件夹？
public class DecoderGui extends javax.swing.JPanel {
/**
 * Creates new form DecoderGui
 */
public static void main(String[] args)
{
    Security.addProvider(new BouncyCastleProvider());
    JFrame frame = new JFrame();
    frame.add( new DecoderGui());
    frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
    frame.setResizable( false );
    frame.pack();
    frame.setLocationRelativeTo( null );
    frame.setVisible(true);
}     
public DecoderGui() {
    initComponents();
}


@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {
    keyFile = new javax.swing.JTextField();
    jLabel1 = new javax.swing.JLabel();
    sourceDirectory = new javax.swing.JTextField();
    destinationDirectory = new javax.swing.JTextField();
    keyButton = new javax.swing.JButton();
    sourceButton = new javax.swing.JButton();
    destinationButton = new javax.swing.JButton();
    decryptButton = new javax.swing.JButton();
    exitButton = new javax.swing.JButton();
    message = new javax.swing.JLabel();
    jLabel1.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
    jLabel1.setText("Schutzstaffel Decryption");
    destinationDirectory.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            destinationDirectoryActionPerformed(evt);
        }
    });
    keyButton.setText("Key File");
    keyButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            keyButtonActionPerformed(evt);
        }
    });
    sourceButton.setText("Browse");
    sourceButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            sourceButtonActionPerformed(evt);
        }
    });
    destinationButton.setText("Save");
    destinationButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            destinationButtonActionPerformed(evt);
        }
    });
    decryptButton.setText("Decrypt");
    decryptButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            decryptButtonActionPerformed(evt);
        }
    });
    exitButton.setText("Exit");
    exitButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            exitButtonActionPerformed(evt);
        }
    });
    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
    this.setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGap(84, 84, 84)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGap(29, 29, 29)
                                .addComponent(decryptButton, javax.swing.GroupLayout.PREFERRED_SIZE, 95, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(84, 84, 84)
                                .addComponent(exitButton, javax.swing.GroupLayout.PREFERRED_SIZE, 95, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addComponent(message, javax.swing.GroupLayout.PREFERRED_SIZE, 436, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGroup(layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                .addComponent(keyFile, javax.swing.GroupLayout.DEFAULT_SIZE, 299, Short.MAX_VALUE)
                                .addComponent(sourceDirectory)
                                .addComponent(destinationDirectory))
                            .addGap(43, 43, 43)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addComponent(keyButton, javax.swing.GroupLayout.PREFERRED_SIZE, 78, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addComponent(destinationButton, javax.swing.GroupLayout.PREFERRED_SIZE, 78, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addComponent(sourceButton, javax.swing.GroupLayout.PREFERRED_SIZE, 78, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGroup(layout.createSequentialGroup()
                    .addGap(145, 145, 145)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 212, javax.swing.GroupLayout.PREFERRED_SIZE)))
            .addContainerGap(99, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(20, 20, 20)
            .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(31, 31, 31)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(keyFile, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(keyButton))
            .addGap(33, 33, 33)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(sourceDirectory, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(sourceButton))
            .addGap(34, 34, 34)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(destinationDirectory, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(destinationButton))
            .addGap(27, 27, 27)
            .addComponent(message)
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(decryptButton, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(exitButton, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap(82, Short.MAX_VALUE))
    );
}// </editor-fold>                        
private void exitButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           
    System.exit(0);
}                                          
private void decryptButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              
    try {
        if(keyFile.getText() == null || keyFile.getText().equals("")) {
            message.setText("Please select the key file");
        }
        if(sourceDirectory.getText() == null || sourceDirectory.getText().equals("")) {
            message.setText("Please select the source folder");
        }
        if(destinationDirectory.getText() == null || destinationDirectory.getText().equals("")) {
            message.setText("Please select the destination folder");
        }
        Decoder decoder = new Decoder();
        File sourcedir = new File(sourceDirectory.getText());
        File destinationdir = new File(destinationDirectory.getText());
    //    System.out.println(seeder);
        String seeder = new String(decoder.getFileDataToStream(keyFile.getText()));
        System.out.println(seeder);
        File[] directoryListing = sourcedir.listFiles();
        if (directoryListing != null) {
            for (File child : directoryListing) {
                System.out.println(child.getCanonicalPath());
                byte[] inputstream = decoder.getFileDataToStream(child.getCanonicalPath());
                byte[] outputstream = decoder.decrypt(seeder, inputstream);
                FileOutputStream fos = new FileOutputStream(destinationDirectory.getText()+File.separator+new String(Base64.decodeBase64(child.getName())));
                fos.write(outputstream);
                fos.close();
            }
            message.setText("Decryption done");
        } else {
            message.setText("Error while Listing the Source Directory Files");
        }
    } catch (IOException ex) {
        Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
    } catch (Exception ex) {
        Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
    }
}                                             
private void keyButtonActionPerformed(java.awt.event.ActionEvent evt) {                                          
    JFileChooser chooser = new JFileChooser();
    chooser.setCurrentDirectory(new java.io.File("."));
    chooser.setDialogTitle("Choose Key File");
    chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
    chooser.setAcceptAllFileFilterUsed(false);
    if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
        try {
            System.out.println("getCurrentDirectory(): " + chooser.getCurrentDirectory());
            System.out.println("getSelectedFile() : " + chooser.getSelectedFile());
            keyFile.setText(chooser.getSelectedFile().getCanonicalPath());
        } catch (IOException ex) {
            Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
        }
    } else {
      System.out.println("No Selection ");
    }
}                                         
private void sourceButtonActionPerformed(java.awt.event.ActionEvent evt) {                                             
    JFileChooser chooser = new JFileChooser();
    chooser.setCurrentDirectory(new java.io.File("."));
    chooser.setDialogTitle("Choose Source Folder");
    chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    chooser.setAcceptAllFileFilterUsed(false);
    if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
        try {
            System.out.println("getCurrentDirectory(): " + chooser.getCurrentDirectory());
            System.out.println("getSelectedFile() : " + chooser.getSelectedFile());
            sourceDirectory.setText(chooser.getSelectedFile().getCanonicalPath());
        } catch (IOException ex) {
            Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
        }
    } else {
      System.out.println("No Selection ");
    }
}                                            
private void destinationButtonActionPerformed(java.awt.event.ActionEvent evt) {                                                  
    JFileChooser chooser = new JFileChooser();
    chooser.setCurrentDirectory(new java.io.File("."));
    chooser.setDialogTitle("Choose Destination Folder");
    chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    chooser.setAcceptAllFileFilterUsed(false);
    if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
        try {
            System.out.println("getCurrentDirectory(): " + chooser.getCurrentDirectory());
            System.out.println("getSelectedFile() : " + chooser.getSelectedFile());
            destinationDirectory.setText(chooser.getSelectedFile().getCanonicalPath());
        } catch (IOException ex) {
            Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
        }
    } else {
      System.out.println("No Selection ");
    }
}                                                 
private void destinationDirectoryActionPerformed(java.awt.event.ActionEvent evt) {                                                     
    // TODO add your handling code here:
}

问题 1： 当解密文件时出错时，您的代码将退出 for 循环，因此其他文件未解密，请参阅下面的更正代码，并添加您的代码代替 ToDo：

private void decryptButtonActionPerformed(java.awt.event.ActionEvent evt) {                                              
        try {
            if(keyFile.getText() == null || keyFile.getText().equals("")) {
                message.setText("Please select the key file");
            }
            if(sourceDirectory.getText() == null || sourceDirectory.getText().equals("")) {
                message.setText("Please select the source folder");
            }
            if(destinationDirectory.getText() == null || destinationDirectory.getText().equals("")) {
                message.setText("Please select the destination folder");
            }
            Decoder decoder = new Decoder();
            File sourcedir = new File(sourceDirectory.getText());
            File destinationdir = new File(destinationDirectory.getText());
        //    System.out.println(seeder);
            String seeder = new String(decoder.getFileDataToStream(keyFile.getText()));
            System.out.println(seeder);
            File[] directoryListing = sourcedir.listFiles();
            if (directoryListing != null) {
                for (File child : directoryListing) {
                    try{
                        System.out.println(child.getCanonicalPath());
                        byte[] inputstream = decoder.getFileDataToStream(child.getCanonicalPath());
                        byte[] outputstream = decoder.decrypt(seeder, inputstream);
                        FileOutputStream fos = new FileOutputStream(destinationDirectory.getText()+File.separator+new String(Base64.decodeBase64(child.getName())));
                        fos.write(outputstream);
                        fos.close();
                    }
                    catch(Exception e){
                        // ToDo: handle the case when file was not decrypted
                    }
                }
                message.setText("Decryption done");
            } else {
                message.setText("Error while Listing the Source Directory Files");
            }
        } catch (IOException ex) {
            Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(DecoderGui.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

问题 2：获取文件夹中的所有文件夹。 完整的文件夹层次结构

LinkedList<String> folders = new LinkedList<String>();
folders.add("c:\");
while(!folders.isEmpty()){
    File file = new File(folders.poll());
    if(file.listFiles()!=null)
        for(File dir:file.listFiles()){
            if(dir.isDirectory()){
                folders.add(dir.getAbsolutePath());
                System.out.println("Folder " + dir.getAbsolutePath());
            }
        }
}

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