mainframe.java

读存大块资料（二进制）文件,Java编程可编译运行

package jdatastreamdemo;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class MainFrame extends JFrame {
  private JPanel contentPane;
  private BorderLayout borderLayout1 = new BorderLayout();
  private JPanel jPanel1 = new JPanel();
  private JScrollPane jScrollPane1 = new JScrollPane();
  private JButton jButton1 = new JButton();
  private JTextArea jTextArea1 = new JTextArea();
  private JLabel jLabel1 = new JLabel();
  private JLabel jLabel2 = new JLabel();
  private GridLayout gridLayout1 = new GridLayout();
  private JTextField jTextField1 = new JTextField();
  private JTextField jTextField2 = new JTextField();

  File infile =null;
  File outfile =  null;
  FileInputStream fis = null;
  FileOutputStream fos = null;
  DataInputStream dis = null;
  DataOutputStream dos = null;

  //Construct the frame
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(MainFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(395, 195));
    this.setTitle("JDataStreamDemo");
    jButton1.setText("Start");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jLabel1.setMaximumSize(new Dimension(50, 18));
    jLabel1.setText("源文件：");
    jLabel2.setText("目标文件：");
    jPanel1.setLayout(gridLayout1);
    gridLayout1.setColumns(2);
    gridLayout1.setRows(2);
    contentPane.add(jPanel1, BorderLayout.NORTH);
    jPanel1.add(jLabel1, null);
    jPanel1.add(jTextField1, null);
    jPanel1.add(jLabel2, null);
    jPanel1.add(jTextField2, null);
    contentPane.add(jScrollPane1, BorderLayout.CENTER);
    jScrollPane1.getViewport().add(jTextArea1, null);
    contentPane.add(jButton1,  BorderLayout.SOUTH);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    final int BufferSize = 1024;
    byte[] buffer = new byte[BufferSize];
    try{
      infile = new File(this.jTextField1.getText());
      outfile = new File(this.jTextField2.getText());
      if ( !outfile.exists())
        outfile.createNewFile();
      fis = new FileInputStream(infile);
      fos = new FileOutputStream(outfile);

      dis = new DataInputStream(fis);
      dos = new DataOutputStream(fos);

      this.jTextArea1.setText("");
      this.jTextArea1.append("Read  from file "+infile.getAbsolutePath()+"\n");
      this.jTextArea1.append("Write to file "+outfile.getAbsolutePath()+"\n");

      int bytes;
      while ((bytes=dis.read(buffer,0,BufferSize)) != -1){
        dos.write(buffer,0,bytes);
        this.jTextArea1.append("  Read  "+bytes+"B"+"  Write  "+bytes+"B"+"\n");

      }

      this.jTextArea1.append("Complete \n");

      dis.close();
      dos.close();


    }
    catch(Exception err){
      err.printStackTrace();

    }

  }
}