Spring Security 6实战：OAuth2与OIDC集成指南
Spring Security 6: OAuth2 and OIDC Integration Guide
| iDev Tech | 2026-08-24T10:30:00
手把手教你在Spring Boot 3项目中集成OAuth2和OpenID Connect，实现第三方登录和单点登录。
Step-by-step guide to integrating OAuth2 and OpenID Connect in Spring Boot 3 projects for social login and SSO.
OAuth2核心概念OAuth2定义了四种授权模式：授权码模式（推荐）、客户端凭证模式、设备授权模式和刷新Token模式。Spring Security 6已移除密码模式和隐式模式的支持（安全考虑）。理解这些模式的适用场景是正确实现的前提。集成步骤引入spring-boot-starter-oauth2-client依赖；配置application.yml中的provider信息（Google、GitHub等）；自定义OAuth2UserService处理用户信息映射；配置SecurityFilterChain定义保护策略。关键注意点：回调URL必须与OAuth Provider注册时一致。OIDC单点登录OpenID Connect是OAuth2之上的身份层。通过配置spring-boot-starter-oauth2-resource-server，可以验证JWT格式的ID Token，实现跨服务的单点登录。建议使用JWK Set URI进行密钥轮换，而非硬编码公钥。
OAuth2 Core ConceptsOAuth2 defines four grant types: Authorization Code (recommended), Client Credentials, Device Authorization, and Refresh Token. Spring Security 6 removed support for Password and Implicit grants (security reasons). Understanding appropriate use cases is essential for correct implementation.Integration StepsAdd spring-boot-starter-oauth2-client dependency; configure provider details in application.yml (Google, GitHub, etc.); customize OAuth2UserService for user info mapping; configure SecurityFilterChain for protection policies. Key note: callback URLs must exactly match OAuth Provider registration.OIDC Single Sign-OnOpenID Connect is an identity layer on top of OAuth2. By configuring spring-boot-starter-oauth2-resource-server, you can validate JWT-format ID Tokens for cross-service SSO. Recommend using JWK Set URI for key rotation rather than hardcoded public keys.