可以使用 OpenID 完成身份验证.Google http://code.google.com/apis/中有详细的文档帐户/文档/OpenID.html

Authentication can be done using OpenID. A detailed document is there in Google http://code.google.com/apis/accounts/docs/OpenID.html

更新:Google 已弃用这些链接.请参阅以下链接以使用 Google 自己的 OAuth2 API 文档，而不是费心阅读库，因为它们非常复杂，最终可能会失去焦点.

Update: The links have been deprecated by Google. Refer to the following links to use Google's own OAuth2 API documentation instead of bothering so much into reading the libraries because they are very complicated and may end up losing focus.