如何避免 Laravel 项目中的反射异常以及产生它的原因是什么？

Question

我使用 Laravel 制作了一个名为 my-school 的项目。一切正常，除非我使用 XAMPP 运行我的项目。
然后我使用这个网址：localhost/my-school/public/。

这是引发的异常：

Fatal error: Uncaught exception 'ReflectionException' with message
'Class MySchool\Http\Kernel does not exist' in
E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Container\Container.php:776
Stack trace: #0
E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Container\Container.php(776):
ReflectionClass->__construct('MySchool\\Http\\K...') #1
E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Container\Container.php(656):
Illuminate\Container\Container->build('MySchool\\Http\\K...', Array)
#2 E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(613):
Illuminate\Container\Container->make('MySchool\\Http\\K...', Array) #3
E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Container\Container.php(229):
Illuminate\Foundation\Application->make('MySchool\\Http\\K...', Array)
#4 E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Container\Container.php(773):
Illuminate\Container\Container->Illuminate\Container\{clo in
E:\xampp\htdocs\my-school\vendor\laravel\framework\src\Illuminate\Container\Container.php
on line 776

这是我的 composer.json 文件内容：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "laravel/framework": "5.0.*"
    },
    "require-dev": {
        "phpunit/phpunit": "~4.0",
        "phpspec/phpspec": "~2.1"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-create-project-cmd": [
            "php -r \"copy('.env.example', '.env');\"",
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    }
}

有人可以帮我找出我的项目的问题吗？

Answer 1

看看作曲家自动加载的值：

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

这意味着app\ folder 内所有类的命名空间应以“App\”作为名称开始。在您的情况下，错误状态是：

致命错误：带有消息的未捕获异常“ReflectionException” 'Class MySchool\Http\Kernel 不存在'

MySchool\Http\Kernel 永远不会被加载，因为它不存在。相反，您的作曲家需要以下结构：

Class App\Http\Kernel

看到区别了吗？然后，尝试将应用重命名如下：

php artisan app:name MySchool 

这样一来，所有课程都将按照我认为您想要的方式路由为 MySchool。