~~~ //修改composer.json文件： { "require": { "illuminate/container": "^5.2" }, "autoload": { "psr-4": { "App\\": "app/" } } } #composer install // app/Test/Test.php文件 namespace App\Test; class Test { public function index() { echo "This is a custom class which will be autoload by composer\n"; } } //index.php require_once __DIR__.'/vendor/autoload.php'; $test = new App\Test\Test(); $test->index(); ~~~