Learn SPRING-SECURITY with Real Code Examples

Filter chain intercepts requests and applies security checks

AuthenticationManager handles authentication

SecurityContext stores security info per request/session

Authorization via roles, authorities, and ACLs

Integration with Spring components and beans

Incoming request hits filter chain

Authentication filters validate credentials

Authorization checks enforce access control

SecurityContext stores principal info

Response returned if access allowed

Filter chain for request interception

AuthenticationManager pattern for auth logic

SecurityContextHolder for thread-local auth info

Declarative and annotation-based security

Integration with Spring MVC controllers and services

Enterprise web application with role-based access

Microservices secured via JWT and OAuth2

Single Sign-On (SSO) via OAuth2/OpenID Connect

REST API backend with method-level security

Hybrid apps combining session-based and token-based auth

Comprehensive and configurable security

Seamless integration with Spring ecosystem

Filter chain for flexible request processing

Support for modern authentication standards

Extensible with custom filters and providers

Use stateless JWT for REST APIs

Offload session management to external store if needed

Minimize filter chain overhead

Horizontal scaling with multiple instances

Integrate with API gateways for centralized security

Upgrade Spring Boot and Security dependencies

Refactor deprecated config classes (WebSecurityConfigurerAdapter -> SecurityFilterChain)

Test authentication and authorization flows

Validate JWT/OAuth2 integration

Deploy incrementally with monitoring