文件操作

package fileOpt;

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SpringLayout;

public class FileMove extends JPanel implements ActionListener{
   public static int FROM = 1;
   public static int TO = 2;
   private JTextField fromField;
   private JButton fromButton;
   private JTextField toField;
   private JButton toButton;
   private JButton moveButton;
   private File fromFile;
   private File toFile;
   public FileMove(){
    this.setPreferredSize(new Dimension(350,251));
    SpringLayout layout = new SpringLayout();
    this.setLayout(layout);
   
    this.fromField = new JTextField();
    this.fromField.setPreferredSize(new Dimension(230,26));
    this.add(this.fromField);
    layout.putConstraint(SpringLayout.NORTH, this.fromField, 10, SpringLayout.NORTH, this);
    layout.putConstraint(SpringLayout.WEST, this.fromField, 10, SpringLayout.NORTH, this);
   
    this.fromButton = new JButton("refer to");
    this.fromButton.setPreferredSize(new Dimension(80,26));
    this.add(this.fromButton);
    layout.putConstraint(SpringLayout.NORTH, this.fromButton, 10, SpringLayout.NORTH, this);
    layout.putConstraint(SpringLayout.WEST, this.fromButton, 20, SpringLayout.EAST, this.fromField);
    this.fromButton.addActionListener(this);
   
    this.toField = new JTextField();
    this.toField.setPreferredSize(new Dimension(230,26));
    this.add(this.toField);
    layout.putConstraint(SpringLayout.NORTH, this.toField, 10, SpringLayout.SOUTH, fromField);
    layout.putConstraint(SpringLayout.WEST, this.toField, 10, SpringLayout.NORTH, this);
   
    this.toButton = new JButton("refer to");
    this.toButton.setPreferredSize(new Dimension(80,26));
    this.add(this.toButton);
    layout.putConstraint(SpringLayout.NORTH, this.toButton, 10, SpringLayout.SOUTH, fromField);
    layout.putConstraint(SpringLayout.WEST, this.toButton, 20, SpringLayout.EAST, this.toField);
    this.toButton.addActionListener(this);
   
    moveButton = new JButton("move");
    this.moveButton.setPreferredSize(new Dimension(80,26));
    this.add(this.moveButton);
    moveButton.addActionListener(this);
    layout.putConstraint(SpringLayout.NORTH, this.moveButton, 10, SpringLayout.SOUTH, toField);
    layout.putConstraint(SpringLayout.WEST, this.moveButton, 140, SpringLayout.WEST, this);
   }
   public void moveFile() throws IOException{
    if (this.fromFile == null|| this.toField == null ) {
  System.err.println("path null");
 }
  
    byte[] bs = new byte[1560];
   // FileOutputStream outputStream = new FileOutputStream(fromPath);
    BufferedInputStream fileInputStream = new BufferedInputStream(new FileInputStream(this.fromFile));
    int  len;
    BufferedOutputStream outputStream =new BufferedOutputStream(new FileOutputStream(toFile));
    try {
  while ((len = fileInputStream.read(bs)) != -1) {
      for(int i=0;i<len;i++) {
       outputStream.write(bs[i]);
      }

     }
 } finally {
  fileInputStream.close();
  outputStream.close();
 }
   }
   public void showReferPathDialog(int flag){
    System.err.println();;
    if (flag == FileMove.FROM) {
     JFileChooser chosee = new JFileChooser();
     //chosee.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
     chosee.showOpenDialog(this);
     this.fromFile = chosee.getSelectedFile();
           this.fromField.setText(fromFile.getPath());
    }
    if (flag == FileMove.TO) {
     JFileChooser chosee = new JFileChooser();
     chosee.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
     int n = chosee.showOpenDialog(this);
     if (n == JFileChooser.APPROVE_OPTION) {
     this.toFile = chosee.getSelectedFile();
     String[] strings = toFile.getPath().split("////");
     StringBuffer buffer = new StringBuffer();
     for (int i = 0; i < strings.length; i++) {
     buffer.append(strings[i] + File.separator);
    
   }
     this.toField.setText(this.toFile.getPath());
     buffer.append(fromFile.getName());
     this.toFile = new File(buffer.toString());
  }
    
 }
   }
 public void actionPerformed(ActionEvent e) {
  if (e.getSource() == this.fromButton) {
   showReferPathDialog(FileMove.FROM);
  }
  if (e.getSource() == this.toButton) {
   showReferPathDialog(FileMove.TO);
  }
  if (e.getSource() == this.moveButton) {
   try {
    this.moveFile();
   } catch (IOException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
   }
  }
 }
 public static void main(String[] args) {
  JPanel panel = new FileMove();
  JFrame frame = new JFrame();
  frame.add(panel);
  frame.pack();
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.setVisible(true);
 }
}