可能是最详细的Spring Cloud OAuth2实现单点登录

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.core.Authentication;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationSuccessHandler;
import org.springframework.stereotype.Component;
 
@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            // 其他配置 ...
            .oauth2Login()
            .successHandler(new SimpleUrlAuthenticationSuccessHandler("/dashboard"))
            // 其他配置 ...
            ;
    }
 
    @Component
    public static class AuthenticationSuccessHandler extends SimpleUrlAuthenticationSuccessHandler {
 
        @Override
        public void onAuthenticationSuccess(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Authentication authentication) {
            // 自定义登录成功后的行为
        }
    }
}

这个代码示例展示了如何在Spring Security中使用OAuth 2.0进行登录，并提供了一个自定义的登录成功处理器AuthenticationSuccessHandler。在configure方法中，我们使用了.oauth2Login()来启用OAuth 2.0登录，并通过.successHandler()指定了登录成功后要跳转的URL以及自定义的登录成功处理器。