<"local" driver, as well as a variety of cloud
  | based drivers are available for your choosing. Just store away!
  |
  | Supported: "local", "ftp", "s3", "rackspace"
  |
  */
  'default' => 'local',
  /*
  |--------------------------------------------------------------------------
  | Default Cloud Filesystem Disk
  |--------------------------------------------------------------------------
  |
  | Many applications store files both locally and in the cloud. For this
  | reason, you may specify a default "cloud" driver here. This driver
  | will be bound as the Cloud disk implementation in the container.
  |
  */
  'cloud' => 's3',
  /*
  |--------------------------------------------------------------------------
  | Filesystem Disks
  |--------------------------------------------------------------------------
  |
  | Here you may configure as many filesystem "disks" as you wish, and you
  | may even configure multiple disks of the same driver. Defaults have
  | been setup for each driver as an example of the required options.
  |
  */
  'disks' => [
    'local' => [
      'driver' => 'local',
      'root'  => storage_path('app'),
    ],
    'ftp' => [
      'driver'  => 'ftp',
      'host'   => 'ftp.example.com',
      'username' => 'your-username',
      'password' => 'your-password',
      // Optional FTP Settings...
      // 'port'   => 21,
      // 'root'   => '',
      // 'passive' => true,
      // 'ssl'   => true,
      // 'timeout' => 30,
    ],
    's3' => [
      'driver' => 's3',
      'key'  => 'your-key',
      'secret' => 'your-secret',
      'region' => 'your-region',
      'bucket' => 'your-bucket',
    ],
    'rackspace' => [
      'driver'  => 'rackspace',
      'username' => 'your-username',
      'key'    => 'your-key',
      'container' => 'your-container',
      'endpoint' => 'https://identity.api.rackspacecloud.com/v2.0/',
      'region'  => 'IAD',
      'url_type' => 'publicURL',
    ],
  ],
];

    'local' => [
      'driver' => 'local',
//      'root'  => storage_path('app'), 在/storage/app/目录
      'root'  => public_path('uploads'), // 在public/uploads/ 目录
    ],

  public function index()
  {
    $disk = Storage::disk('local');
    // 创建一个文件
    $disk->put('file1.txt', 'Laravel Storage');
  }

public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 取出文件
    $file = $disk->get('test.txt');
    dd($file);
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 取出文件
    $exists = $disk->exists('image.png');
    dd($exists);  // false
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 取出文件
    $size = Storage::size('/home/test.txt');
    dd($size); // 4
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 取出文件
    $time = Storage::lastModified('file1.txt');   // 1507701271
    $time = Carbon::createFromTimestamp($time);
    echo $time;   // 2017-10-11 05:54:31
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 储存文件
    $disk->put('file2.txt', 'file2 content'); // 新建一个文件
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 拷贝文件 第一个参数是要拷贝的文件，第二个参数是拷贝到哪里
    $disk->copy('home/test.txt','rename.txt');
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 拷贝文件 第一个参数是要移动的文件，第二个参数是移动到哪里
    $disk->move('file2.txt', 'home/file.txt');
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 在文件开头添加
    $disk->prepend('file1.txt', 'test prepend');
    // 在文件末尾添加
    $disk->append('file1.txt', 'test append');
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 删除单条文件
    $disk->delete('test.txt');
    // 删除多条文件
    $disk->delete(['test22.txt', 'icon.jpg']);
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    $directory = '/';
    // 获取目录下的文件
    $files = $disk->files($directory);
    // 获取目录下的所有文件(包括子目录下的文件)
    $allFiles = $disk->allFiles($directory);
    dd($files, $allFiles);
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    $directory = '/';
    // 获取目录下的子目录
    $directories = $disk->directories($directory);
    // 获取目录下的所有子目录(包括子目录下的子目录)
    $allDirectories = $disk->allDirectories($directory);
    dd($directories, $allDirectories);
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 创建目录
    $disk->makeDirectory('test');
    $disk->makeDirectory('test1/test2');
  }

  public function index()
  {
    // 取到磁盘实例
    $disk = Storage::disk('local');
    // 删除目录
    $disk->deleteDirectory('test');
    $disk->deleteDirectory('test1/test2');
  }