/*

    复制文件夹

    参数 File src，File dest

     */

    public static void copy(File src,File dest){

        if (src.isDirectory() && dest.isDirectory()){

            //在dest文件夹下创建一个src同名的文件夹

            File newDir = new File(dest, src.getName());

            newDir.mkdir();

            //将src下边的孩子复制到newDir中

            File[] files = src.listFiles();

            for (File file : files) {

                if (file.isDirectory()){

                    copy(file,newDir);

                }else {

                    //复制文件

                    try (

                            FileInputStream fis = new FileInputStream(file);

                            FileOutputStream fos = new FileOutputStream(new File(newDir,file.getName()))

                    ) {

                        byte[] bytes = new byte[1024];

                        int len;

                        while ((len = fis.read(bytes)) != -1){

                            fos.write(bytes,0,len);

                        }

                    }catch (IOException e){

                        e.printStackTrace();

                    }

                }

            }

        }

    }