SpringBoot Security OAuth2实现单点登录SSO（附源码）

以下是一个简化的Spring Boot Security OAuth2单点登录的示例代码：

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
import org.springframework.security.oauth2.client.web.DefaultOAuth2ClientContext;
import org.springframework.security.oauth2.client.web.OAuth2ClientContext;
 
@Configuration
public class OAuth2LoginConfig extends WebSecurityConfigurerAdapter {
 
    private final ClientRegistrationRepository clientRegistrationRepository;
 
    public OAuth2LoginConfig(ClientRegistrationRepository clientRegistrationRepository) {
        this.clientRegistrationRepository = clientRegistrationRepository;
    }
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
            .anyRequest().authenticated()
            .and()
            .oauth2Login()
            .clientRegistrationRepository(clientRegistrationRepository)
            .authorizationEndpoint()
            .baseUri("/oauth2/authorize")
            .and()
            .redirectionEndpoint()
            .baseUri("/oauth2/callback/*");
    }
 
    // 注册ClientRegistrationRepository
    // 这通常是通过配置文件或者数据库来完成的，这里为了简化，我们直接在代码中定义
    // 实际应用中，应该从外部配置加载
    @Bean
    public ClientRegistrationRepository clientRegistrationRepository() {
        ClientRegistration googleClient = ClientRegistration.withRegistrationId("google")
            .clientId("client-id")
            .clientSecret("client-secret")
            .clientName("Google")
            .authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE)
            .redirectUri("{baseUrl}/oauth2/callback/{registrationId}")
            .scope(OidcScopes.OPENID, OidcScopes.EMAIL, OidcScopes.PROFILE)
            .authorizationUri("https://accounts.google.com/o/oauth2/v2/auth")
            .tokenUri("https://www.googleapis.com/oauth2/v4/token")