Spring Boot Tutorial

Spring Boot is a Java framework built on top of Spring that simplifies application development. It eliminates boilerplate code with auto-configuration. Spring Boot comes with an embedded server, making applications production ready out of the box. It supports web apps, REST APIs, microservices, security and seamless cloud deployment.

Why learn 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.

Getting Started with Spring Boot

In this section, you’ll learn what Spring Boot is, how it differs from Spring and Spring MVC and how to set up your development environment to quickly build and run your first application.

• Introduction
• Spring vs Spring Boot
• Spring MVC vs Spring Boot
• Create your First Spring Boot Project :STS, Eclipse & IntelliJ
• Run Spring Boot Application

Spring Core Concept

To work effectively with Spring Boot, a solid understanding of core Java and essential Spring concepts is important. Knowledge of build tools such as Maven or Gradle, along with databases and SQL for JPA/Hibernate integration, will also help in building robust applications.

• Inversion of Control
• Dependency Injection
• BeanFactory vs. ApplicationContext
• Spring Bean Lifecycle
• Singleton, Prototype Scope
• Custom Scope
• Create a Spring Bean
• Spring Autowiring
• DispatcherServlet
• Spring IoC Container
• Maven/Gradle (project build tools)

Spring Boot 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.

• Architecture
• Annotations
• Auto-configuration
• Spring Boot Starters
• Create a basic application
• Best Practices for Spring Boot Application
• Application Properties
• YAML Configuration
• Actuator
• Logging
• DevTools

Spring Boot with REST API

Spring Boot makes building RESTful APIs simple and efficient with built-in support for HTTP methods, JSON handling and easy request mapping. It provides tools to quickly develop, validate and manage APIs with minimal boilerplate code.

• Introduction
• @RestController
• @RequestMapping
• @GetMapping & @PostMapping
• @PutMapping & @DeleteMapping
• @PathVariable & @RequestParam
• @RequestBody
• REST API
• JSON Serialization/Deserialization
• Exception Handling
• Validation

Spring Boot with Database and Data JPA

Spring Boot simplifies database integration by providing seamless support for relational and NoSQL databases. With Spring Data JPA, Hibernate and JDBC, it enables efficient CRUD operations, repository management and easy testing using in-memory databases like H2.

• Integrating Spring Boot with MySQL
• PostgreSQL
• MongoDB
• Spring Data JPA
• Hibernate Basics
• JDBC
• CrudRepository vs. JpaRepository
• H2 Database for Testing
• CRUD Operations with JPA Repositories
• Project: Todo List API using Spring Boot and MySQL

Advanced Spring Boot Features

Spring Boot offers advanced features to handle real-world application needs. From scheduling tasks and sending emails to managing files, caching and transactions, it provides built in support and annotations for efficient development and clean architecture.

• Scheduling Tasks
• Sending Emails
• File Handling & Uploading Files
• Caching
• Caching with other Providers
• Transaction Management
• DTO Mapping

Microservices with Spring Boot

Spring Boot simplifies building microservices by providing lightweight, independent and easily deployable components. With features like service communication, containerization and cloud deployment, it enables developers to build scalable and production-ready systems efficiently.

• Introduction
• Communication Between Spring Microservices
• Deploy Java Microservices on AWS Elastic Beanstalk
• Project: Microservices Sample Project

Spring Boot with Kafka

Apache Kafka is a distributed messaging system used to build real-time data pipelines and streaming applications. In Spring Boot, Kafka allows applications to produce and consume messages efficiently, handle JSON or string data, manage topics and even integrate with tools like ElasticSearch and Grafana for real-time monitoring.

• Kafka Producer and Consumer in Spring Boot
• Publishing and Consuming JSON Messages
• Publishing and Consuming String Messages
• Create and Configure Topics in Apache Kafka
• Consume Message Through Kafka, Save into ElasticSearch and Plot into Grafana
• Start/Stop a Kafka Listener Dynamically

Spring Boot with AOP

Aspect-Oriented Programming (AOP) in Spring Boot allows developers to separate cross-cutting concerns like logging, security or transactions from the main business logic. It complements Object-Oriented Programming (OOP) by modularizing behaviors that affect multiple parts of an application, making code cleaner and more maintainable.

• Introduction
• Spring Boot Advices
• Before
• After
• Around
• After Throwing
• After Returning
• AOP vs OOP
• AOP vs AspectJ

Spring Boot Testing

Testing is an important part of building reliable Spring Boot applications. It involves unit testing with JUnit, mocking dependencies using Mockito, performing integration tests with MockMVC and automating tests with tools like ZeroCode to ensure your application behaves as expected.

• Unit Testing with JUnit
• Testing with Mockito
• Integration Testing with MockMVC
• Using ZeroCode for Testing