Laravel 5.4 文件上传下载

Laravel 5.4 文件上传下载

一、上传 

1.在public目录下新建文件夹：uploads

2.修改config/filesystems.php

'disks' => [

        'local' => [

            'driver' => 'local',

             'root' => public_path('uploads'),

        ],

3.html代码 

<form action="{{URL('files/store')}}" method="POST" enctype="multipart/form-data" >
 {!! csrf_field() !!} 
 <div class="form-group"> 
 <input class="form-control" name="files" type="file">
 <label>文件说明：</label>

 </div>

<button type="sumbit" class="btn btn-success"><i class="fa fa-upload"></i>上传</button>

</form>

4.添加路由 web.php

Route::post('/files/store','FilesController@store');

5.控制器代码

头部注意引入

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Response;

保存代码 (数据库字段：file_id（主键自增） 、file_name（原文件名）、 file_url（返回的路径 详见 http://d.laravel-china.org/docs/5.4/filesystem） 

public function store(Request $request)

    {



        if (!$request->hasFile('files')) {

            return redirect()->back()->withErrors("上传文件为空或者上传文件过大");

        }

        $upload_files = $request->file();

        if (empty($upload_files) || !is_array($upload_files)) {

            return redirect()->back()->withErrors("上传失败");

        }

        $file = $request->file('files');

        //判断文件上传过程中是否出错//

        if (!$file->isValid()) {

            exit('文件上传出错！');

        } else {

            //获取原文件名//

            $originalName = $file->getClientOriginalName();

            //扩展名//

            $ext = $file->getClientOriginalExtension();

            //文件类型//

            $type = $file->getClientMimeType();

            $allow_type = ['image/jpeg', 'application/pdf', 'image/jpg', 'application/octet-stream', 'image/png', 'image/gif', 'application/msword', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/vnd.ms-excel', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'];

            if (!in_array($type, $allow_type)) {

                return redirect()->back()->withErrors("文件类型不允许");



            }

            //临时绝对路径

            //$realPath = $file->getRealPath();

           // $filename = date('Y-m-d-H-i-S') . '-' . uniqid() . '-' . $ext;

 //加了一个files文件夹 在uploads下//

            $path = $request->file('files')->store(

                'files');

            $input              = $request->all();

            $input['file_url']  = $path; 

            $input['file_name'] = $originalName;

            $add                = Files::create($input);

            return redirect()->back()->withSuccess("$add->file_name 上传成功");

        }



    }

 

   

二、下载 

html部分，传入file_id

<a href="{{URL("files/download/$file->file_id ")}}" class="btn btn-sm btn-success"><i class="fa fa-download"></i>下载</a>

控制器 注意引入Response

public function download($id)

    {

        $file         = Files::findOrFail($id);

        $out_filename = $file->file_name;

        $exists       = Storage::exists($file->file_url);

        if ($exists) {

            return response()->download(

        realpath(base_path('public/uploads/')).'/'.$file->file_url,

        $out_filename);

           // return $contents;



        }



    }