Laravel使用外部类

I'm new on laravel and need some help. Actualy i use 5.3 laravel version. I need to use, in laravel, external company framework (call it F for semplicity). This framework is some like process manager. Actualy, for integrate it with laravel i put it in laravel/public folder, this way i can use laravel and F's pages in same domain. In laravel i need to access to some F functionality wich is all collect in class FFramework\Facade\FInterface; Then i want to acces to this class from laravel controller FController. But when i run code i get Class Not Found Exception.

This is folder structure:

• laravel
  • app
    • http
      • controllers
      • FController.php
• public
  • css
  • js
  • index.php
  • fframework
    • facade
      • FInterface.php
    • index.php

This is code example:

FController.php

<?php
  namespace App\Http\Controllers;

  use FFramework\facade\FInterface;

  class FController extends Controller {

      public function getSimpleDAta() {
          $f = new FInterface();
          return $f->getSimpleData();
    }
  }

FInterface.php

<?php
  namespace FFramework\facade;

  use some\internal\function;

  class FInterface {

      public function getSimpleDAta() {
          $simpleData = ...omg so much computation :) ...
          return $simpleData;
    }
  }

Exception that i get:

Class 'FFramework\facade\FInterface' not found

Additional Information

I use standard LAMP configuration PHP version is last 5.6 stable version

Question

How can i use FInterface from Laravel controller leaving FFramework in public folder?

You need to update the autoload section of your composer.json file to tell your project where to look for files in the FFramework namespace.

"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "App\\": "app/"
        "FFramework\\": "public/fframework"
    }
},