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 App\Http\Controllers;
use Illuminate\Http\Request;
use App\Http\Requests;
use Illuminate\Support\Facades\Storage;
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>