> For the complete documentation index, see [llms.txt](https://jack80342.gitbook.io/spring-boot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://jack80342.gitbook.io/spring-boot/iv.-spring-boot-features/28.-security/28.3-oauth2.md).

# 28.3 OAuth2

[OAuth2](https://oauth.net/2/)是一个Spring支持的被广泛使用的认证框架。