15-Day Spring Boot Training Plan Day Topics to Cover Practice/Assignment 1 Introduction to Spring & Spring Boot Why Spring Boot? Key Features, Architecture Install Spring Boot, Setup IDE (STS or IntelliJ) 2 Spring Boot Project Setup Spring Initializr, Maven/Gradle Basics, Project Structure Create a "Hello World" REST API 3 Spring Boot Annotations @SpringBootApplication, @RestController, @RequestMapping Build a basic REST Controller 4 Building REST APIs @GetMapping, @PostMapping, @PathVariable, @RequestParam Create endpoints for CRUD operations (without DB) 5 Spring Boot with Database (JPA) Introduction to JPA, Entity, Repository Pattern Create a User Entity and connect with H2 Database 6 Spring Data JPA in Depth CrudRepository, JpaRepository, Custom Queries Write methods like findByName, findByEmail 7 Spring Boot Exception Handling @ExceptionHandler, @ControllerAdvice Implement global error handling for APIs 8 Spring Boot Validation Bean Validation (Hibernate Validator, @Valid, @NotNull) Validate incoming request body for APIs 9 Spring Boot Application Properties External Configurations, Profiles Setup different properties for dev and prod 10 Spring Boot Security Basics Username/Password Authentication Add simple authentication to your APIs 11 Spring Boot + Swagger API Documentation using OpenAPI/Swagger UI Document your existing APIs using Swagger 12 Mini Project (Part 1) Project Idea: "Simple Employee Management System" Create basic modules (Employee CRUD APIs) 13 Mini Project (Part 2) Add Validation, Error Handling, Basic Authentication Complete core backend logic 14 Spring Boot Testing Unit Testing with JUnit, MockMvc Write 2-3 unit test cases for your controllers 15 Deploying Spring Boot App Create JAR file, Deploy to Local/Heroku/AWS Deploy project on project(Free hosting option)