好吧，我自己弄清楚了.我的问题是我的config.yml错误.我在config.yml中缺少 auto_mapping:true 行.

Ok, I figured it out myself. My problem is that my config.yml was wrong. I was missing the auto_mapping: true line in my config.yml.

doctrine:
    # (dbal stuff here)

    orm:
        auto_generate_proxy_classes: "%kernel.debug%"
        auto_mapping: true

添加完之后，使用 php应用程序/控制台学说:generate:entities MySite/MyBundle/Entity/User 行自动生成一切正常

After adding that, everything auto-generates fine with the php app/console doctrine:generate:entities MySite/MyBundle/Entity/User line