找不到 Laravel 5 自定义包类

我正在创建 laravel 5.2 软件包，以下是我的文件

包/
-什里吉/
--戒指/
---作曲家.json
---来源/
----戒指.php
----戒指模型.php
----RingServiceProvider

作曲家.json

{
 "name": "shreeji/ring",
 "description": "Simple",
 "license": "MIT",
 "authors": [
     {
         "name": "author",
         "email": "email@gmail.com"
     }
 ],
 "autoload": {
        "psr-4": {
             "Shreeji''Ring''": "src/"
         }
     },
 "minimum-stability": "dev",
 "require": {
     "Illuminate/support": "~5"
 }
}

戒指.php

namespace Shreeji'Ring;
use Illuminate'Http'Response;
Class Ring {
private $ringmodel;
protected $table_name = null;

function __construct() {
}
function set_table($table_name)
{
    $this->table_name = $table_name;
    $this->ringmodel = New RingModel($this->table_name);
    return $this;
}
}

戒指模型.php

use 'Illuminate'Database'Eloquent'Model as Eloquent;
class RingModel extends Eloquent {
// Set table name;
protected $table;
protected $primary_key;
public function __construct($table)
{
    $this->table = $table;
}
}

环形服务提供商.php

namespace Shreeji'Ring;
use Illuminate'Support'ServiceProvider;
Class RingServiceProvider extends ServiceProvider
{
public function register()
{
    $this->app->bind('ring', function($app){
        return new Ring;
    });
}
public function boot()
{
}
}

在应用程序/Http/控制器中，我创建了这样的测试文件

环形控制器.php

namespace App'Http'Controllers;
use App'Http'Controllers'Controller;
use Shreeji'Ring;
class RingController extends Controller
{
 public function index()
 {
     $ring = New Ring();
     $ring->set_table('ring');
 }
}

在路线中.php

Route::get('ringtest', [ 'as' => 'ringtest', 'uses' => 'RingController@index' ]);

我在配置/应用程序中添加了服务提供商.php作为

Shreeji'Ring'RingServiceProvider::class,

在 composer.json 中，我已将其添加为

.....
"psr-4": {
        "App''": "app/",
        "Shreeji''Ring''": "packages/Shreeji/Ring/src"
    }
.....

当我从浏览器调用ringtest时，出现以下错误。

RingController 中的 FatalErrorException .php第 19 行：找不到类 'Shreeji''Ring'

我的代码有什么问题，为什么找不到这个类，我也运行了作曲家转储自动加载。