java - 如何读取 wav 文件并替换其中的位？

Question

我刚刚开始学习 Java，正在开发一个 Java 音频隐写项目(即将文本文件隐藏在 wav 文件中)。

为此，我将文本和 wav 文件存储在两个文件中。现在我想以字节为单位读取它们，并用文本文件位替换 wav 文件的随机位。

如何以字节为单位读取文件？ (我尝试过使用InputStream)。是否可以用文本文件的位替换 wav 文件中的随机位？有什么功能可以实现吗？读取文件(文本和 wav 文件)后，如何编辑(和替换)wav 文件的字节？

这是第一个屏幕，当用户点击“隐藏”按钮时，会打开下一个屏幕。

public class OptionScreen extends javax.swing.JFrame {

    /** Creates new form OptionScreen */
    public OptionScreen() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        hide = new javax.swing.JButton();
        unhide = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        hide.setText("Hide");
        hide.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                hideActionPerformed(evt);
            }
        });

        unhide.setText("UnHide");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(55, 55, 55)
                .addComponent(hide, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(94, 94, 94)
                .addComponent(unhide, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(81, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(109, 109, 109)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(hide, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(unhide, javax.swing.GroupLayout.PREFERRED_SIZE, 90, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(101, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void hideActionPerformed(java.awt.event.ActionEvent evt) {                                     
        second s=new second();
        s.setVisible(true);
    }                                    

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new OptionScreen().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton hide;
    private javax.swing.JButton unhide;
    // End of variables declaration                   
}


import java.io.DataInputStream;
import java.io.File;
import java.io.File.*;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;

public class second extends javax.swing.JFrame {
private File afile;     // put at bottom of class
private File tfile;
    /** Creates new form second */
    public second() {
        initComponents();
    }


    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        text = new javax.swing.JButton();
        audio = new javax.swing.JButton();
        tname = new javax.swing.JLabel();
        aname = new javax.swing.JLabel();
        begin = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        text.setText("TEXT FILE");
        text.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                textActionPerformed(evt);
            }
        });

        audio.setText("AUDIO FILE");
        audio.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                audioActionPerformed(evt);
            }
        });

        begin.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        begin.setText("BEGIN");
        begin.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                beginActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().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(87, 87, 87)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(text, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(audio, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(layout.createSequentialGroup()
                                .addGap(18, 18, 18)
                                .addComponent(tname, javax.swing.GroupLayout.PREFERRED_SIZE, 57, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(layout.createSequentialGroup()
                                .addGap(26, 26, 26)
                                .addComponent(aname, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(270, 270, 270)
                        .addComponent(begin, javax.swing.GroupLayout.PREFERRED_SIZE, 99, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(31, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(101, 101, 101)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(text)
                    .addComponent(tname, javax.swing.GroupLayout.PREFERRED_SIZE, 19, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(32, 32, 32)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(audio)
                    .addComponent(aname, javax.swing.GroupLayout.PREFERRED_SIZE, 19, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(begin, javax.swing.GroupLayout.PREFERRED_SIZE, 96, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(19, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void textActionPerformed(java.awt.event.ActionEvent evt) {                                     
        JFileChooser opentext=new JFileChooser();
        opentext.showOpenDialog(this);
        int returnVal = opentext.showOpenDialog(this);
    if (returnVal == JFileChooser.APPROVE_OPTION) {
        tfile = opentext.getSelectedFile();
        String tfname=tfile.getName();
        tname.setText(tfname);
        // ... code that loads the contents of the file in the text area

    } 

    }                                    

    private void audioActionPerformed(java.awt.event.ActionEvent evt) {                                      
        JFileChooser openaudio=new JFileChooser();
        openaudio.showOpenDialog(this);
        int returnVal = openaudio.showOpenDialog(this);
    if (returnVal == JFileChooser.APPROVE_OPTION) {
        afile = openaudio.getSelectedFile();
        aname.setText(afile.getName());
        // ... code that loads the contents of the file in the text area
    } 
    }                                     

    private void beginActionPerformed(java.awt.event.ActionEvent evt) {                                      
        try {
            InputStream fint = new FileInputStream(tfile);

            byte []bt=new byte[(int)afile.length()];
            InputStream fina = new FileInputStream(afile);
            int offset = 0;
            int numRead = 0;
            //
            try {

                System.out.println(new DataInputStream(fint).readByte());
            } catch (IOException ex) {
                Logger.getLogger(second.class.getName()).log(Level.SEVERE, null, ex);
            }
            //
            System.out.println(bt);


//////////////////////////////////////////////////////////////////

            FileOutputStream outs=new FileOutputStream(new File("C:\\Documents and Settings\\Administrator\\My Documents\\My Music\\Secret.wav"));
        } catch (FileNotFoundException ex) {

        }

        //end of try catch
    }                                     

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new second().setVisible(true);

            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JLabel aname;
    private javax.swing.JButton audio;
    private javax.swing.JButton begin;
    private javax.swing.JButton text;
    private javax.swing.JLabel tname;
    // End of variables declaration                   
}

Answer 1

您有两种方法:(1) 将文件读入字节数组，然后在内存中对其进行操作，然后将其写回磁盘。 (2) 使用 RandomAccessFile 允许您直接操作磁盘上的文件。