Spring Boot is a Java framework built on Spring that simplifies application development with auto-configuration, embedded servers, and minimal boilerplate code. It helps developers build production-ready applications for web, REST APIs, microservices, security, and cloud deployment.
Importance of Spring Boot?
- Fast Development: Quickly build production ready apps with minimal configuration.
- Auto-Configuration: Reduces boilerplate code, you can focus on business logic.
- Microservices Friendly: Perfect for building and managing distributed systems.
- Seamless Integrations: Works easily with databases, security, messaging and cloud platforms.
- Wide Adoption: Backed by Spring ecosystem and used in real world enterprise applications.
Basics
Start by understanding Spring Boot, how it differs from the Spring Framework and Spring MVC, its architecture, and how to set up and run your first Spring Boot application.
- Introduction
- Spring vs Spring Boot
- Spring MVC vs Spring Boot
- Spring Boot Architecture
- Maven vs Gradle
- Spring Initializr
- Create Your First Spring Boot Project: STS, Eclipse, and IntelliJ IDEA
- Understanding pom.xml / build.gradle
- Run Spring Boot Application
Core Concept
These concepts provide the foundation for understanding how Spring manages beans, dependencies, configuration, and application components.
- Inversion of Control
- Dependency Injection
- BeanFactory vs. ApplicationContext
- Spring Bean Lifecycle
- Create a Spring Bean
- Singleton, Prototype Scope
- Custom Scope
- Spring Autowiring
- DispatcherServlet
- Component Scanning
- @Component, @Service, and @Repository
Core Features
Spring Boot comes with core features like auto-configuration, starter packs and flexible configuration. These make application setup easier, faster and more efficient.
- Annotations
- Auto-configuration
- Spring Boot - Dependency Management
- Best Practices for Spring Boot Application
- Application Properties
- YAML Configuration
- Actuator
- DevTools
REST API Development
Spring Boot simplifies the development of REST APIs for communication between clients and servers. It helps developers build scalable and maintainable web services with less configuration.
- Introduction to RESTful Web Services
- @RestController
- @RequestMapping
- @GetMapping and @PostMapping
- @PutMapping and @DeleteMapping
- @PathVariable and @RequestParam
- @RequestBody
- Creating a REST API
- JSON Serialization and Deserialization
- Exception Handling
- Validation
- ResponseEntity and HTTP Status Codes
- Controller-Service-Repository Architecture
- Swagger/OpenAPI Documentation
Database Integration and Spring Data JPA
Spring Boot simplifies working with databases and managing application data efficiently. It helps developers build data-driven applications with less configuration and cleaner code.
- Integrating Spring Boot with MySQL
- PostgreSQL
- MongoDB
- Spring Data JPA
- Spring Boot JDBC
- CrudRepository vs JpaRepository
- H2 Database
- CRUD Operations with JPA
- Entity and Repository
- Implement One-to-One
- Implement One to Many Mapping
- Implement Many-to-Many
- JPQL and Native Queries
- Pagination and Sorting with JPA
- Project: Todo List API using Spring Boot and MySQL
Aspect-Oriented Programming (AOP)
Aspect-Oriented Programming helps separate cross-cutting concerns such as logging, security, and transaction-related logic from the application's core business logic.
- Introduction
- Aspect, JoinPoint, Advice
- Spring Boot Advices
- Before
- After
- Around
- After Throwing
- After Returning
- AOP vs OOP
- AOP vs AspectJ
Advanced Features
Advanced Spring Boot features help developers build more powerful, flexible, and production-ready applications. They simplify common development tasks and improve application maintainability and performance.
- Scheduling Tasks
- Sending Emails
- File Handling & Uploading Files
- Caching
- Caching with other Providers
- Transaction Management
- DTO Mapping
- Externalized Configuration
- Spring Boot Profiles
Spring Boot Security
Secure Spring Boot applications using Spring Security. These topics cover authentication, authorization, password protection, security filters, JWT-based authentication, and role-based access control.
- Introduction to Spring Security
- Authentication vs Authorization
- Password Encoding
- Securing REST APIs
- JWT Authentication
- Security Filters
- Role-Based Access Control
Testing Spring Boot Applications
Spring Boot Testing helps ensure that applications work correctly and reliably. It allows developers to verify application behavior and identify issues before deployment.
- Unit Testing with JUnit
- Testing with Mockito
- Integration Testing with MockMvc
- Test Slices
- Integration Testing
- Using ZeroCode for Testing
Apache Kafka
Apache Kafka is a distributed messaging platform used for building real-time data pipelines and event-driven applications. Spring Boot provides convenient integration with Kafka for producing, consuming, and processing messages.
- Kafka Producer in Spring Boot
- Kafka Consumer in Spring Boot
- Publishing JSON Messages
- Consuming JSON Messages
- Publishing String Messages
- Consuming String Messages
- Create and Configure Kafka Topics
- Kafka, Elasticsearch and Grafana Integration
- Start/Stop Kafka Listener Dynamically
Microservices
Microservices architecture divides an application into independently deployable services. Spring Boot and Spring Cloud provide tools for developing, communicating between, and managing these services.
- Introduction to Spring Boot Microservices
- Monolithic vs Microservices Architecture
- Service-to-Service Communication
- REST-based Communication
- OpenFeign
- Service Discovery with Eureka
- API Gateway
- Centralized Configuration
- Circuit Breaker Pattern with Resilience4J
- Communication Between Spring Microservices
- Deploy Java Microservices on AWS Elastic Beanstalk
- Microservices Sample Project
Docker and Deployment
Spring Boot with Docker and deployment helps developers package and deploy applications efficiently across different environments. It makes application delivery more consistent, portable, and easier to manage.
- Introduction to Docker
- Dockerizing Spring Boot Apps
- Build a Spring Boot Docker Image
- Docker Compose
- Spring Boot with MySQL using Docker Compose
- Spring Boot with Kafka using Docker Compose
- Environment Variables and Production Configuration
- Logging and Monitoring
- Cloud Deployment
- AWS Deployment
