SBean AtlasSpring platform fieldbook Start learning

Spring Framework · Spring Boot · production Java

Connect the objects.
Keep the business clear.

Learn how Spring assembles enterprise applications—from the first bean to secure APIs, transactions, messaging, observability, and recovery.

Open the fieldbook ↗Explore 80 concepts

IoC · DI · bean lifecycle · Boot · MVC · WebFlux · data · transactions · testing · security · messaging · Actuator

Spring application context bean graph An application context constructs and connects controllers, services, repositories, security, messaging, and observability components. APPLICATIONCONTEXT CONTROLLER SERVICE SECURITY REPOSITORY EVENTS METRICS REQUEST → VALIDATE → TRANSACT → OBSERVE BEANINJECTED DEPENDENCY
What you will be able to do
01 Explain the container
02 Design clean modules
03 Protect data and APIs
04 Operate production safely

18 production chapters

Learn the framework from the inside out.

Every chapter turns annotations into behavior you can explain, test, and operate.
  1. 01ConnectObjects, dependencies, beans, lifecycle, and proxies4 chapters
  2. 02BuildBoot, configuration, HTTP contracts, and transactions5 chapters
  3. 03ProtectTests, security, integration, observability, and resilience7 chapters
  4. 04ProveApply Spring to PeopleFlow and enterprise integrations2 chapters

One request, fully understood

HTTP enters.
Business rules decide.

Trace the Spring MVC lifecycle →
  1. 01Security filter chainAuthenticate and authorize
  2. 02Controller boundaryParse and validate the contract
  3. 03Application serviceRun the business use case
  4. 04Transaction and outboxCommit state and event intent
  5. 05ObservabilityMeasure the user outcome

Retrieve and apply

Practice behavior, not annotation trivia.

Concept labSearch 80 Spring concepts with when-to-use and failure guidance.Open workspace ↗ Full assessmentTake a 60-question, 130-minute mock with two enterprise cases.Begin assessment ↗ Printable fieldbookRead the complete simple-language Spring guide offline.Download PDF ↓

The container connects objects. You connect the system.

Build Spring applications you can explain.

Begin chapter 00 ↗