Java 复制文件时如何使用ProgressMonitorInputStream？_Java_Swing_File Io_Copy_Progress Bar

Java 复制文件时如何使用ProgressMonitorInputStream？

java swing file-io

Java 复制文件时如何使用ProgressMonitorInputStream？,java,swing,file-io,copy,progress-bar,Java,Swing,File Io,Copy,Progress Bar,我试图用java将文件从一个地方复制到另一个地方。我正在使用FileInputStream和 FileOutputStream复制。这是我的密码： private JPanel contentPane; private JButton btnCopy; private JFileChooser SelectFile; private JFileChooser ChooseDestination; private File Selectedfile; private File chosenDest

我试图用java将文件从一个地方复制到另一个地方。我正在使用

FileInputStream

和

FileOutputStream

复制。这是我的密码：

private JPanel contentPane;
private JButton btnCopy;
private JFileChooser SelectFile;
private JFileChooser ChooseDestination;
private File Selectedfile;
private File chosenDestination;


    protected void Copy() {
        // TODO Auto-generated method stub
        int answer = SelectFile.showOpenDialog(this);
        if(answer==0){
            this.Selectedfile = SelectFile.getSelectedFile();
            int answer2 = ChooseDestination.showSaveDialog(this);
            if(answer2==0){
                this.chosenDestination = ChooseDestination.getSelectedFile();
                try {
                    FileInputStream Read = new FileInputStream(Selectedfile);
                    FileOutputStream write = new FileOutputStream(chosenDestination + Selectedfile.getName());
                    InputStream in = new BufferedInputStream(new ProgressMonitorInputStream(main.this,"Copying", new FileInputStream(Selectedfile)));
                    int Data;
                    byte[] buffer = new byte[1024];
                    while((Data= in.read(buffer))>0){
                        write.write(buffer);  
                    }//Here the progressmMonitorInputStream window opens but there is nothing in the window.
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }

它静止不动，直到文件拷贝完成。但文件复制正确。我只想在单独的窗口中显示进度条。请帮帮我。谢谢。
请参阅。
请参阅。
以下代码会有所帮助：

import java.awt.BorderLayout; public class Main extends JFrame implements PropertyChangeListener { private JPanel contentPane; private JButton btnCopy; private JFileChooser selectFile; private JFileChooser chooseDestination; private File selectedfile; private File chosenDestination; private JProgressBar progressBar; private Copy copy; class Copy extends SwingWorker<Void, Void> { @Override protected Void doInBackground() throws Exception { int answer = selectFile.showOpenDialog(Main.this); if (answer == 0) { Main.this.selectedfile = selectFile.getSelectedFile(); int answer2 = chooseDestination.showSaveDialog(Main.this); if (answer2 == 0) { Main.this.chosenDestination = chooseDestination .getSelectedFile(); try { FileInputStream fileInputStream = new FileInputStream( selectedfile); BufferedInputStream bufferedInputStream = new BufferedInputStream( fileInputStream); ProgressMonitorInputStream progressMonitorInputStream = new ProgressMonitorInputStream( Main.this, "Copying", bufferedInputStream); File outputFile = new File(chosenDestination + selectedfile.getName()); FileOutputStream fileOutputStream = new FileOutputStream( outputFile); BufferedOutputStream bufferedOutputStream = new BufferedOutputStream( fileOutputStream); int data; byte[] buffer = new byte[1024]; while ((data = progressMonitorInputStream.read(buffer)) > 0) { bufferedOutputStream.write(buffer); } bufferedOutputStream.close(); progressMonitorInputStream.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } return null; } /* * Executed in event dispatching thread */ @Override public void done() { Toolkit.getDefaultToolkit().beep(); btnCopy.setEnabled(true); setCursor(null); // turn off the wait cursor } } /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { Main frame = new Main(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. * * @throws UnsupportedLookAndFeelException * @throws IllegalAccessException * @throws InstantiationException * @throws ClassNotFoundException */ public Main() throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 130, 135); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); contentPane.setLayout(new BorderLayout(0, 0)); setContentPane(contentPane); progressBar = new JProgressBar(0, 100); progressBar.setValue(0); progressBar.setStringPainted(true); JPanel panel = new JPanel(); contentPane.add(panel, BorderLayout.CENTER); panel.setLayout(new MigLayout("", "[89px][][][][][][][]", "[23px][][]")); btnCopy = new JButton("Copy"); btnCopy.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { copy = new Copy(); copy.addPropertyChangeListener(Main.this); copy.execute(); } }); panel.add(btnCopy, "cell 1 1,grow"); selectFile = new JFileChooser(); chooseDestination = new JFileChooser(); chooseDestination.setFileSelectionMode(2); pack(); } @Override public void propertyChange(PropertyChangeEvent evt) { if ("progress" == evt.getPropertyName()) { int progress = (Integer) evt.getNewValue(); progressBar.setValue(progress); } } }

导入java.awt.BorderLayout；公共类Main扩展JFrame实现PropertyChangeListener{ 私有JPanel内容窗格；私人JButton btnCopy；私有JFileChooser selectFile； private JFileChooser chooseDestination；私有文件选择文件；私有文件选择；私人JProgressBar progressBar；私人副本；类副本扩展了SwingWorker{ @凌驾受保护的Void doInBackground（）引发异常{ int answer=selectFile.showOpenDialog（Main.this）；如果（答案=0）{ Main.this.selectedfile=selectFile.getSelectedFile（）； int answer2=选择destination.showsavedilog（Main.this）；如果（回答2==0）{ Main.this.chosenDestination=选择Destination .getSelectedFile（）；试一试{ FileInputStream FileInputStream=新FileInputStream( 所选文件）； BufferedInputStream BufferedInputStream=新的BufferedInputStream( 文件输入流）； ProgressMonitorInputStream ProgressMonitorInputStream=新的ProgressMonitorInputStream( Main.this，“复制”，bufferedInputStream）； File outputFile=新文件（chosenDestination +selectedfile.getName（））； FileOutputStream FileOutputStream=新的FileOutputStream( 输出文件）； BufferedOutputStream BufferedOutputStream=新的BufferedOutputStream( 文件输出流）； int数据；字节[]缓冲区=新字节[1024]；而（（数据=progressMonitorInputStream.read（缓冲区））>0）{ bufferedOutputStream.write（缓冲区）；} bufferedOutputStream.close（）； progressMonitorInputStream.close（）； }catch（filenotfounde异常）{ e、 printStackTrace（）； }捕获（IOE异常）{ e、 printStackTrace（）； } } } 返回null； } /* *在事件调度线程中执行 */ @凌驾公众假期结束（）{ getDefaultToolkit（）.beep（）； btnCopy.setEnabled（true）； setCursor（null）；//关闭等待光标 } } /** *启动应用程序。 */ 公共静态void main（字符串[]args）{ invokeLater（新的Runnable（）{ 公开募捐{ 试一试{ 主机架=新主机架（）； frame.setVisible（true）； }捕获（例外e）{ e、 printStackTrace（）； } } }); } /** *创建框架。 * *@抛出不受支持的LookandFeelException *@galacessException *@throws实例化异常 *@ClassNotFoundException */ public Main（）抛出ClassNotFoundException、InstanceionException、，非法访问异常，不受支持的OOK和FEELEXCEPTION{ UIManager.setLookAndFeel（UIManager.getSystemLookAndFeelClassName（））； setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）；立根（100100130135）； contentPane=newjpanel（）； setboorder（新的EmptyBorder（5,5,5,5））； setLayout（新的BorderLayout（0,0））； setContentPane（contentPane）； progressBar=新的JProgressBar（01100）； progressBar.setValue（0）； progressBar.SetStringPaint（真）； JPanel面板=新的JPanel（）； contentPane.add（面板，BorderLayout.CENTER）； panel.setLayout（新的MigLayout（“，”[89px][]”，“[23px][]”））； btnCopy=新的JButton（“复制”）； btnCopy.addActionListener（新ActionListener（）{ 已执行的公共无效操作（操作事件arg0）{ 复制=新复制（）； copy.addPropertyChangeListener（Main.this）； copy.execute（）； } }); 添加（btnCopy，“单元格1，生长”）； selectFile=newjfilechooser（）； chooseDestination=新建JFileChooser（）；选择Destination.setFileSelectionMode（2）；包装（）； } @凌驾公共作废属性更改（属性更改事件evt）{ if（“progress”==evt.getPropertyName（））{ int progress=（整数）evt.getNewValue（）； progressBar.setValue（进度）； } } }
以下代码会有所帮助：

import java.awt.BorderLayout; public class Main extends JFrame implements PropertyChangeListener { private JPanel contentPane; private JButton btnCopy; private JFileChooser selectFile; private JFileChooser chooseDestination; private File selectedfile; private File chosenDestination; private JProgressBar progressBar; private Copy copy; class Copy extends SwingWorker<Void, Void> { @Override protected Void doInBackground() throws Exception { int answer = selectFile.showOpenDialog(Main.this); if (answer == 0) { Main.this.selectedfile = selectFile.getSelectedFile(); int answer2 = chooseDestination.showSaveDialog(Main.this); if (answer2 == 0) { Main.this.chosenDestination = chooseDestination .getSelectedFile(); try { FileInputStream fileInputStream = new FileInputStream( selectedfile); BufferedInputStream bufferedInputStream = new BufferedInputStream( fileInputStream); ProgressMonitorInputStream progressMonitorInputStream = new ProgressMonitorInputStream( Main.this, "Copying", bufferedInputStream); File outputFile = new File(chosenDestination + selectedfile.getName()); FileOutputStream fileOutputStream = new FileOutputStream( outputFile); BufferedOutputStream bufferedOutputStream = new BufferedOutputStream( fileOutputStream); int data; byte[] buffer = new byte[1024]; while ((data = progressMonitorInputStream.read(buffer)) > 0) { bufferedOutputStream.write(buffer); } bufferedOutputStream.close(); progressMonitorInputStream.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } return null; } /* * Executed in event dispatching thread */ @Override public void done() { Toolkit.getDefaultToolkit().beep(); btnCopy.setEnabled(true); setCursor(null); // turn off the wait cursor } } /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { Main frame = new Main(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. * * @throws UnsupportedLookAndFeelException * @throws IllegalAccessException * @throws InstantiationException * @throws ClassNotFoundException */ public Main() throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 130, 135); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); contentPane.setLayout(new BorderLayout(0, 0)); setContentPane(contentPane); progressBar = new JProgressBar(0, 100); progressBar.setValue(0); progressBar.setStringPainted(true); JPanel panel = new JPanel(); contentPane.add(panel, BorderLayout.CENTER); panel.setLayout(new MigLayout("", "[89px][][][][][][][]", "[23px][][]")); btnCopy = new JButton("Copy"); btnCopy.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { copy = new Copy(); copy.addPropertyChangeListener(Main.this); copy.execute(); } }); panel.add(btnCopy, "cell 1 1,grow"); selectFile = new JFileChooser(); chooseDestination = new JFileChooser(); chooseDestination.setFileSelectionMode(2); pack(); } @Override public void propertyChange(PropertyChangeEvent evt) { if ("progress" == evt.getPropertyName()) { int progress = (Integer) evt.getNewValue(); progressBar.setValue(progress); } } }

导入java.awt.BorderLayout；公共类Main扩展JFrame实现PropertyChangeListener{ 私有JPanel内容窗格；私人JButton btnCopy；私有JFileChooser selectFile； private JFileChooser chooseDestination；私有文件选择文件；私有文件选择；私人JProgressBar progressBar；私人副本；类副本扩展了SwingWorker{ @凌驾受保护的Void doInBackground（）引发异常{ int answer=selectFile.showOpenDialog（Main.this）；如果（答案=0）{