Experience with SSO?

Yes, I have worked with SSO (Single Sign-On) in Java projects. I usually integrated SSO using protocols like OAuth2, OpenID Connect, or SAML. For example, I used Spring Security with OAuth2 support for single sign-on in corporate applications. This allows users to authenticate once and access multiple systems without re-entering their password.

An example of OAuth2 client configuration in Spring Boot:

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .oauth2Login()
            .and()
            .authorizeRequests()
            .anyRequest().authenticated();
    }
}

I also have experience integrating SSO via SAML, using libraries like Spring Security SAML, which work with corporate Identity Providers (IdP).