JavaIO流中实现文件复制

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileCopy {
    public static void main(String[] args) {
        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            fis=new FileInputStream("D:\\test.doc");
            fos = new FileOutputStream("D:\\testfile\\test.doc");
            byte[] bytes = new byte[1024];
            int redCount=0;
            while((redCount=fis.read(bytes)) != -1){
                fos.write(bytes,0,redCount);
            }
            fos.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}