Symfony2 - Composer搞砸了我的网站，因为所有的bundle都不存在

我的Symfony2设置一切都很棒，直到我开始搞乱Composer .

我确实使用Composer安装了Symfony2，但随后手动添加了包 - 包括我自己创建的包 .

然后，我需要添加一些使用Composer更容易的东西 . 稍后在终端中搞乱了很多我然后发现当我在浏览器中运行时，我在AppKernel.php中收到错误，说没有捆绑存在 - 包括：

FatalErrorException: Error: Class 'Acme\DemoBundle\AcmeDemoBundle' not found in /path/app/AppKernel.php line 39

我100％文件夹存在，除了运行各种Composer命令之外没有任何改变 .

Composer没有引用这些包 .

我该如何解决这个问题？我猜我要么告诉Composer要清除（像之前一样），要么以某种方式让Composer理解这些包 .

我猜它与bootstrap文件有关 . 我相信Composer会在更新后创建一个，但这是我在努力的地方 .

composer.json：

{
"name": "symfony/framework-standard-edition",
"description": "The \"Symfony Standard Edition\" distribution",
"autoload": {
    "psr-0": { "": "src/" }
},
"require": {
    "php": ">=5.3.3",
    "symfony/symfony": "2.2.*",
    "doctrine/orm": "~2.2,>=2.2.3",
    "doctrine/doctrine-bundle": "1.2.*",
    "twig/extensions": "1.0.*",
    "symfony/assetic-bundle": "2.1.*",
    "symfony/swiftmailer-bundle": "2.2.*",
    "symfony/monolog-bundle": "2.2.*",
    "sensio/distribution-bundle": "2.2.*",
    "sensio/framework-extra-bundle": "2.2.*",
    "sensio/generator-bundle": "2.2.*",
    "jms/security-extra-bundle": "1.4.*",
    "jms/di-extra-bundle": "1.3.*"
},
"scripts": {
    "post-install-cmd": [
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ],
    "post-update-cmd": [
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ]
},
"config": {
    "bin-dir": "bin"
},
"minimum-stability": "alpha",
"extra": {
    "symfony-web-dir": "web",
    "symfony-app-dir": "app",
    "branch-alias": {
        "dev-master": "2.2-dev"
    }
}

}