java复制整个目录及文件

import java.io.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class CopyFiles extends JFrame implements ActionListener,Runnable{
	public static void main(String[] args) {
		CopyFiles cf=new CopyFiles();
	}

	JTextField tx1=new JTextField();
	JTextField tx2=new JTextField();
	JTextArea ta=new JTextArea();
	
	CopyFiles(){
		JFrame w=new JFrame();
		w.setSize(450,500);
		w.setLocationRelativeTo(null);
		
		JLabel l1=new JLabel("源目录:");
		JLabel l2=new JLabel("目标目录:");
		
		
		
		JButton b1=new JButton("源目录");
		JButton b2=new JButton("目标目录");
		
		
		JScrollPane sp=new JScrollPane(ta);
		
		JButton b3=new JButton("复制");
		
		JPanel p1=new JPanel();
		p1.setLayout(new GridLayout(2,3));
		p1.add(l1);
		p1.add(tx1);
		p1.add(b1);
		p1.add(l2);
		p1.add(tx2);
		p1.add(b2);
		
		w.setLayout(new BorderLayout());
		w.add(p1,BorderLayout.NORTH);
		w.add(sp,BorderLayout.CENTER);
		w.add(b3,BorderLayout.SOUTH);
		
		b1.addActionListener(this);
		b2.addActionListener(this);
		b3.addActionListener(this);
		
		w.setVisible(true);
	}
	

@Override
public void run() {
	copy(new File(tx1.getText()),new File(tx2.getText()));
}

public  void copy(File f,File t){
	String newDir=t.getPath()+"\\"+f.getName();
	ta.append("正在创建目录"+newDir+"...\n");
	File newDirFile=new File(newDir);
	newDirFile.mkdir();
	
	File sub[]=f.listFiles();
		for(File s:sub){
			if(s.isDirectory()){
				copy(s,newDirFile);
			}
		
			if(s.isFile()){
				ta.append("正在复制文件"+s+"...\n");
				copyFile(s,new File(newDir+"/"+s.getName()));
			}
		}
	}

public void copyFile(File from,File to){
	try{
		FileInputStream fis=new FileInputStream(from);
		FileOutputStream fos=new FileOutputStream(to);
		byte[] tmp=new byte[8192];
		int len=fis.available()/8192;
		for(int i=0;i<len;i++){
			fis.read(tmp);
			fos.write(tmp);
		}
		
		int size=fis.read(tmp);
		fos.write(tmp,0,size);
		fos.close();
		
		
	}catch(Exception e){}
	
	
}
@Override
public void actionPerformed(ActionEvent e) {
	if(e.getActionCommand().equals("源目录")){
		JFileChooser jc=new JFileChooser();
		jc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
		jc.showOpenDialog(this);
		File choosefile=jc.getSelectedFile();
		if(choosefile.exists())
		tx1.setText(choosefile.getPath());
	}
	
	if(e.getActionCommand().equals("目标目录")){
		JFileChooser jc=new JFileChooser();
		jc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
		jc.showOpenDialog(this);
		File choosefile=jc.getSelectedFile();
		if(choosefile.exists())
		tx2.setText(choosefile.getPath());
	}
	
	if(e.getActionCommand().equals("复制")){
		Thread t=new Thread(this);
		t.start();
	}
	
}

}