Question

java读取TXT文件并且显示打开进度，最后要逐行显示

要求1.用Swing的进度条显示文件打开的进度
2.逐行/字（词）显示打开的文件内容
分不多求大神 急用

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.io.*;
import java.util.List;
/**
 * @author Hardneedl
 */
final class ProgressDemo extends JFrame {
    public String getTitle() {return "ProgressDemo";}
    static private final Dimension size = new Dimension(600,400);
    public Dimension getPreferredSize() {return size;}
    public Dimension getMaximumSize() {return size;}
    public Dimension getMinimumSize() {return size;}
    public Dimension getSize(){return size;}
    private JTextArea textArea;
    private JProgressBar bar;
    private class ReadSwingWork extends SwingWorker<String,String>{
        private File file;

        private JTextArea area;
        private int pro=0;
        private ReadSwingWork(File f, JTextArea area) {
            file=f;
            this.area=area;
        }

        protected String doInBackground() throws Exception {
            FileInputStream fileReader=new FileInputStream(file);
            int maxLen = fileReader.available();
            byte buf[]=new byte[1];

            String s = null;
            while (fileReader.read(buf)!=-1) {
                s = new String(buf);
                publish(s);
                setProgress( 100*(pro++)/maxLen );
            }
            fileReader.close();
            return s;
        }

        protected void process(List<String> chunks) {
            for (String s:chunks)
                area.append(s);
        }
    }

    private class OpenFileAction extends AbstractAction{
        private JFileChooser chooser;
        private OpenFileAction() {
            super("Open...");
        }

        public void actionPerformed(ActionEvent e) {
            textArea.setText(null);
            if(chooser==null){
                chooser=new JFileChooser(".");
                chooser.setDialogType(JFileChooser.OPEN_DIALOG);
                chooser.setMultiSelectionEnabled(false);
                chooser.setDialogTitle("open file");
            }

            if(chooser.showOpenDialog(null)==JFileChooser.APPROVE_OPTION){
                File file=chooser.getSelectedFile();
                if (file!=null){
                    SwingWorker work=new ReadSwingWork(file,textArea);
                    work.addPropertyChangeListener(new PropertyChangeListener(){
                        public void propertyChange(PropertyChangeEvent evt) {
                            if("progress".equals(evt.getPropertyName())){
                                bar.setValue((Integer) evt.getNewValue());
                            }
                        }
                    });
                    work.execute();
                }
            }

        }
    }
    ProgressDemo() throws HeadlessException {
        init();
        attachListeners();
        doLay();
    }

    private void init(){
        textArea=new JTextArea();
        bar=new JProgressBar(0,100);
    }

    private void attachListeners(){
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    private void doLay(){
        final Container container = getContentPane();
        container.add(new JButton(new OpenFileAction()),BorderLayout.NORTH);
        container.add(new JScrollPane(textArea),BorderLayout.CENTER);
        container.add(bar,BorderLayout.SOUTH);
        pack();
        setVisible(true);
    }
    public static void main(String...args) {
        System.setProperty("swing.defaultlaf","com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
        SwingUtilities.invokeLater(
            new Runnable(){
                public void run() {
                    new ProgressDemo();
                }
            }
        );
    }
}

Answer 2

为你加油~~~~