一、简介
Laravel 有很棒的文件系统抽象层，是基于 Frank de Jonge 的 Flysystem 扩展包。 Laravel 集成的 Flysystem 提供了简单的接口，可以操作本地端空间、 Amazon S3 、 Rackspace Cloud Storage 。更方便的是，它可以非常简单的切换不同保存方式，但仍使用相同的 API 操作！
默认使用本地端空间。当然，你也可以设置多组磁盘，甚至在多个磁盘使用相同的驱动。Laravel文件系统提供了非常强大的功能，但是本文只介绍常用的文件上传功能。
本文通过介绍使用本地端空间来介绍Laravel中文件上传的使用。
二、配置
文件系统的配置文件在 config/filesystems.php 文件中，此处我们新建一个uploads本地磁盘空间用于存储上传的文件，具体配置项及说明如下：
<?php return [ /* |-------------------------------------------------------------------------- | Default Filesystem Disk |-------------------------------------------------------------------------- | | Here you may specify the default filesystem disk that should be used | by the framework. A "local" driver, as well as a variety of cloud | based drivers are available for your choosing. Just store away! | | Supported: "local", "ftp", "s3", "rackspace" | */ // 默认使用本地端空间 支持 "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. | */ // 云存储使用 Amazon S3 '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' => [ // 本地端的local空间 'local' => [ 'driver' => 'local', 'root' => storage_path('app'), ], // 本地端的public空间 'public' => [ 'driver' => 'local', 'root' => storage_path('app/public'), 'visibility' => 'public', ], // 新建一个本地端uploads空间（目录） 用于存储上传的文件 'uploads' => [ 'driver' => 'local', // 文件将上传到storage/app/uploads目录 'root' => storage_path('app/uploads'), // 文件将上传到public/uploads目录 如果需要浏览器直接访问 请设置成这个 //'root' => public_path('uploads'), ], // Amazon S3 相关配置 's3' => [ 'driver' => 's3', 'key' => 'your-key', 'secret' => 'your-secret', 'region' => 'your-region', 'bucket' => 'your-bucket', ], ], ];
三、代码实现文件上传
1. 控制器代码
<?php namespace AppHttpControllers; use IlluminateHttpRequest; use AppHttpRequests; use IlluminateSupportFacadesStorage; class FileController extends Controller { // 文件上传方法 public function upload(Request $request) { if ($request->isMethod('post')) { $file = $request->file('picture'); // 文件是否上传成功 if ($file->isValid()) { // 获取文件相关信息 $originalName = $file->getClientOriginalName(); // 文件原名 $ext = $file->getClientOriginalExtension(); // 扩展名 $realPath = $file->getRealPath(); //临时文件的绝对路径 $type = $file->getClientMimeType(); // image/jpeg // 上传文件 $filename = date('Y-m-d-H-i-s') . '-' . uniqid() . '.' . $ext; // 使用我们新建的uploads本地存储空间（目录） //这里的uploads是配置文件的名称 $bool = Storage::disk('uploads')->put($filename, file_get_contents($realPath)); var_dump($bool); } } return view('upload'); } }
2-1.upload.blade.php 模板代码（上传组件为bootstrap-fileinput）如果太乱，可以看下面的最简单的页面：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="csrf-token" content="{{ csrf_token() }}">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="format-detection" content="telephone=no">
<link rel="stylesheet" href="/static/layui-v2.1.7/css/layui.css" />
<script src="/static/layui-v2.1.7/layui.js"></script>
<link rel="stylesheet" href="/static/css/bootstrap-4.0.0-beta.2/css/bootstrap.min.css" /> <script src="/static/js/jquery/jquery-3.2.1.min.js"></script> <script src="/static/js/popper/popper.min.js"></script> <script src="/static/css/bootstrap-4.0.0-beta.2/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="/static/css/index.css" /> <link href="/static/bootstrap-fileinput/css/fileinput.css" media="all" rel="stylesheet" type="text/css"/> <link href="/static/css/font-awesome-4.7.0/css/font-awesome.min.css" media="all" rel="stylesheet" type="text/css"/> <link href="/static/bootstrap-fileinput/themes/explorer-fa/theme.css" media="all" rel="stylesheet" type="text/css"/> <script src="/static/bootstrap-fileinput/js/plugins/sortable.js" type="text/javascript"></script> <script src="/static/bootstrap-fileinput/js/fileinput.js" type="text/javascript"></script> <script src="/static/bootstrap-fileinput/js/locales/zh.js" type="text/javascript"></script> <script src="/static/bootstrap-fileinput/themes/explorer-fa/theme.js" type="text/javascript"></script> <script src="/static/bootstrap-fileinput/themes/fa/theme.js" type="text/javascript"></script> <title>报表上传</title> </head> <body> <div class="layui-body"> <div style="padding: 15px;"> <blockquote class="layui-elem-quote"> 报表上传 </blockquote> </div> <div class="container"> <div class="container kv-main"> <form enctype="multipart/form-data" method="post"> <label class="control-label">Select File</label> <input id="input-b5" name="input-b5" type="file" multiple> {{ csrf_field() }} </form> </div> </div> </div> </body> <script> $(document).ready(function(){ $("#input-b5").fileinput({ showCaption: false, theme: 'fa', language: 'zh', uploadUrl: './upload', allowedFileExtensions: ['jpg', 'png', 'gif'] }); }); $.ajaxSetup({ headers: { 'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content') } }); </script> </html>
2-2. 最基础的 upload.blade.php 模板代码：
<form method="post" enctype="multipart/form-data" > <input type="file" name="picture"> <button type="submit"> 提交 </button> </form>