JAVA FILE or I/O学习 - 补充CopyFiles功能

 public class CopyFiles
 {
     public static void main(String[] args)
     {
         CopyFiles copyFiles = new CopyFiles();
         copyFiles.copyS("E:\\", "【    图 片    】", "E:\\cba");
     }
     public void copyS(String sourcePath,String name,String newPath)
     {
         File file = new File(sourcePath, name);
         if (file.isDirectory())
         {
             //在新位置创建该文件夹
             File fileDir = new File(newPath, name);
             if (!fileDir.exists())
             {
                 fileDir.mkdir();
                 System.out.println("复制文件夹："+fileDir);
             }
             else {
                 JOptionPane.showMessageDialog(null, "新路径中已经存在该文件！\n"+fileDir, "复制文件 - 提示", JOptionPane.WARNING_MESSAGE);
                 return;
             }

             //操作原位置文件夹中的文件、文件夹
             File[] nextFiles = file.listFiles();
             if (nextFiles.length == 0)
             {
                 return;
             }
             else {
                 for (File fileNext : nextFiles)
                 {
                     copyS(file.getAbsolutePath(), fileNext.getName(), fileDir.getAbsolutePath());
                 }
             }
         }
         else {
             //复制文件
             byte[] data = new byte[1024];
             try
             {
                 BufferedInputStream input = new BufferedInputStream(new FileInputStream(file));
                 File fileNew = new File(newPath, name);
                 if (fileNew.exists())
                 {
                     JOptionPane.showMessageDialog(null, "新路径中已经存在该文件！\n"+fileNew, "复制文件 - 提示", JOptionPane.WARNING_MESSAGE);
                     return;
                 }
                 fileNew.createNewFile();
                 System.out.println("复制文件："+fileNew);
                 BufferedOutputStream output = new BufferedOutputStream(new FileOutputStream(fileNew));
                 while (input.read(data) != -1)
                 {
                     output.write(data);

                 }
                 output.flush();
                 output.close();
                 input.close();
             } catch (FileNotFoundException e)
             {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             } catch (IOException e)
             {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }
 }