Perfect-Roadmap-To-Learn-Java-SpringBoot-In-2025-26

Roadmap To Learn Java SpringBoot in 2025-26

1. Java Fundamentals

1. Learn the Basics
2. Control Flow
3. Object-Oriented Programming (OOP)
4. Methods and Functions
5. Exception Handling
6. Collections Framework
7. Generics
8. File I/O
9. Threads and Concurrency
10. Java API
11. Modern Java Features (Java 8–21)

• Streams, Lambdas, Optional
• Records, Sealed Classes, Pattern Matching
• Virtual Threads (Project Loom)

12. Design Patterns
13. Java Memory Management
14. Unit Testing
15. Java Frameworks
16. Build Tools (Maven, Gradle)
17. Version Control
18. Coding Standards
19. IDE Proficiency
20. Performance Tuning and Garbage Collection

Reference Java Official Documentation: https://docs.oracle.com/en/java/javase/index.html

2. Spring Framework Basics

1. Introduction to Spring
2. Setting Up Spring Environment
3. Inversion of Control (IoC)
4. Dependency Injection (DI)
5. Spring Beans and Scopes
6. Bean Lifecycle and Context
7. Annotation-based Configuration (@Configuration, @ComponentScan)
8. Profiles and Conditional Beans (@Profile, @Conditional)
9. Introduction to Aspect-Oriented Programming (AOP)
10. Spring AOP Implementation
11. Spring JDBC & Transactions
12. Spring MVC Basics

Reference Spring Framework Official Documentation: https://docs.spring.io/spring-framework/reference/index.html

3. Introduction to Spring Boot

1. Understanding Spring Boot
2. Setting Up a Spring Boot Project
3. Project Structure
4. Auto-Configuration
5. YAML Configuration
6. Starters and Dependencies
7. Embedded Servers
8. Profiles and External Configs
9. Actuator
10. DevTools
11. Logging and Observability
12. Spring Boot 3 and Native Image Support (GraalVM)
13. Testing and Integration
14. Handling Exceptions

Reference Spring Boot Official Documentation: https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/

4. Spring Data

1. Understand Data Persistence
2. Learn Basics of Relational Databases
3. Introduction to Spring Data JPA
4. Spring Boot and Data JPA Integration
5. Entity Relationships
6. Query Methods and Named Queries
7. Auditing with Spring Data JPA
8. Pagination and Sorting
9. Custom Repository Methods
10. NoSQL Databases and Spring Data
11. Spring Data REST
12. Transaction Management
13. Data Initialization
14. Spring Data Envers

Reference Spring Data JPA Official Documentation: https://docs.spring.io/spring-data/jpa/reference/index.html

Image source: Medium

5. Spring Security

1. Introduction to Security Concepts
2. Basic Spring Security Configuration
3. Authentication Providers
4. Password Encryption
5. Custom Authentication
6. Authorization
7. Method-Level Security
8. Spring Security Expression Language (SpEL)
9. OAuth 2.0 and OpenID Connect
10. Single Sign-On (SSO)
11. Cross-Site Request Forgery (CSRF) Protection
12. Session Management
13. Security Headers
14. Secure File Uploads
15. Spring Security with Spring Boot Actuator
16. Integration with JWT (JSON Web Tokens)
17. Testing Security Configurations

Reference Spring Security Official Documentation: https://docs.spring.io/spring-security/reference/index.html

Image source: https://technicalsand.com

6. Spring Boot Test

1. Basics of Unit Testing
2. Introduction to JUnit
3. Writing Effective Test Cases
4. Mockito Fundamentals
5. Mocking and Stubbing
6. Parameterized Tests
7. Exception Testing
8. Test Suites
9. Integration Testing Basics
10. Spring Boot Testing Annotations
11. Mocking Dependencies in Spring Boot
12. Database Testing
13. Testing RESTful APIs
14. Test Coverage and Code Quality
15. Continuous Integration (CI) with Testing
16. Test Driven Development (TDD)
17. Testing asynchronous code

Reference Spring Testing Official Documentation: https://docs.spring.io/spring-framework/reference/testing.html

Image source: https://thepracticaldeveloper.com

7. GraphQL with Spring Boot

1. Introduction to GraphQL
2. Basic GraphQL Queries
3. GraphQL Mutations
4. Data Fetching with DataLoaders
5. Pagination and Filtering
6. GraphQL and JPA Integration
7. Error Handling in GraphQL
8. Securing GraphQL Endpoints
9. GraphQL and Spring Security Integration
10. Testing GraphQL Endpoints
11. Performance Optimization
12. GraphQL Best Practices

Reference GraphQL Official Documentation: https://graphql.org/learn/

Image source: https://techdozo.dev/

8. Messaging with Spring Boot

1. Introduction to Messaging
2. Messaging Patterns
3. Introduction to Message Brokers
4. RabbitMQ
5. Spring Boot with RabbitMQ
6. Apache Kafka
7. Spring Boot with Apache Kafka
8. Messaging in Microservices
9. Message Serialization and Deserialization
10. Error Handling in Messaging Systems
11. Asynchronous Processing
12. Spring Cloud Stream
13. Security in Messaging Systems

Reference Messaging Official Documentation: https://docs.spring.io/spring-boot/docs/current/reference/html/messaging.html

Image source: https://www.geeksforgeeks.org

9. Spring Boot Actuator

1. Introduction to Spring Boot Actuator
2. Integration with Spring Boot
3. Actuator Endpoints
4. Custom Endpoints
5. Security and Endpoints Protection
6. Monitoring and Metrics
7. Health Indicators
8. Info Endpoint
9. Logging and Auditing
10. Exposing Additional Information
11. Remote Management with JMX
12. Events and Event Listeners
13. Spring Boot Admin

Reference Spring Boot Actuator Official Documentation: https://docs.spring.io/spring-boot/docs/current/actuator-api/htmlsingle/

Image source: Medium

10. Spring Batch

1. Introduction to Spring Batch
2. Core Components (Job, Step, ItemReader, ItemProcessor, ItemWriter)
3. Advanced Concepts (JobRepository, JobLauncher, JobParameters, JobExecutionListener / StepExecutionListener, Transaction Management, Job Restart and Recovery)
4. Chunk-Oriented Processing
5. Parallel and Scalable Processing
6. Data Sources and Integration
7. Error Handling and Retry
8. Monitoring and Management
9. Testing Spring Batch Jobs

Reference Spring Batch Official Documentation: https://docs.spring.io/spring-batch/reference/index.html

Image source: https://gainjavaknowledge.medium.com/

11. Spring Cloud

1. Introduction to Spring Cloud
2. Configuring Microservices with Spring Cloud Config
3. Service Discovery with Eureka
4. Load Balancing with Ribbon
5. API Gateway with Spring Cloud Gateway
6. Distributed Tracing with Sleuth and Zipkin
7. Fault Tolerance with Hystrix
8. Event-Driven Communication with Spring Cloud Stream
9. Security in Microservices with Spring Cloud Security
10. Distributed Configuration with Consul
11. Circuit Breaker and Stateful Communication
12. Monitoring and Management

Reference Spring Cloud Official Documentation: https://spring.io/projects/spring-cloud/

12. Spring AI

1. Introduction to Spring AI
2. LLM Abstractions (ChatModel, EmbeddingModel, ImageModel)
3. Prompt Templates
4. AI Client Configuration (spring-ai-starter-openai, spring-ai-starter-ollama)
5. Memory and Context Handling
6. Embeddings and Vector Databases (PostgreSQL (pgvector), Redis, Pinecone, or Milvus)
7. RAG (Retrieval-Augmented Generation)
   • Combine LLMs with your data
   • Build RAG pipelines using DocumentRetriever and EmbeddingModel
8. AI Agents and Tools
   • Build agents that can call APIs or databases
   • Chain tasks using the Spring AI Function Calling API
9. Integrating AI with Microservices
   • Use AI endpoints as internal microservices
   • Integrate AI insights into analytics, monitoring, or business workflows
10. Monitor and Scale AI Workloads

Reference Spring AI Official Documentation: https://docs.spring.io/spring-ai/reference/index.html

13. Reactive Programming

1. Reactive Streams and Project Reactor
2. Mono & Flux
3. Backpressure Handling
4. Testing Reactive Code
5. Hybrid Model: Combining Virtual Threads with Reactive Flow

Reference Spring WebFlux Official Documentation: https://docs.spring.io/spring-framework/reference/web/webflux.html

Image source: https://reflectoring.io

14. Building RESTful APIs

1. Understand RESTful Principles
2. Set Up a Development Environment
3. Plan API Endpoints
4. HTTP Methods and Status Codes
5. Request and Response Formats
6. RESTful Routing
7. Authentication and Authorization
8. Request Validation
9. Serialization and Deserialization
10. API Documentation
11. Error Handling
12. Rate Limiting
13. Testing
14. Versioning
15. Security Best Practices
16. Logging and Monitoring
17. Cross-Origin Resource Sharing (CORS)

Reference REST API Official Documentation: https://docs.github.com/en/rest?apiVersion=2022-11-28

15. Microservices Architecture

1. Microservices Fundamentals
2. API Gateway (Spring Cloud Gateway)
3. Service Discovery (Eureka/Consul)
4. Configuration Server
5. Circuit Breaker (Resilience4j)
6. Distributed Tracing (Micrometer, Zipkin, Sleuth)
7. Fault Tolerance and Observability
8. Event-Driven Microservices
9. Async Communication (Kafka, RabbitMQ)
10. AI-Assisted Microservices — Integrating AI Agents in Services

Reference Microservices Architecture Documentation: https://microservices.io/patterns/microservices.html

Image source: Foundersguide

16. Docker and Kubernetes

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