Java

Testing in Spring Boot: A Beginner-Friendly Guide

Learn to test Spring Boot apps: why testing matters, JUnit + Mockito + AssertJ, unit tests with Arrange-Act-Assert, mocking dependencies, and testing endpoints with MockMvc.

54 views3 min

Java

Spring Boot Security & JWT Authentication (Beginner Guide)

Understand Spring Security and JWT the easy way: authentication vs authorization, the stateless JWT flow, sending Bearer tokens, role-based access, and password hashing.

61 views3 min

Java

Spring Boot Configuration & Profiles (Beginner Guide)

Configure Spring Boot the right way: externalize settings in application.yml, read them with @Value, use dev/prod profiles per environment, and keep secrets in env variables.

55 views3 min

Java

Spring Boot Exception Handling Done Right (Beginner Guide)

Handle errors professionally in Spring Boot: global exception handling with @RestControllerAdvice, custom exceptions, correct status codes, and clean consistent error responses.

48 views3 min

Java

Spring Boot Validation: Guard Your API (Beginner Guide)

Learn input validation in Spring Boot: field annotations like @NotBlank and @Email, triggering checks with @Valid, the validation starter, and returning clean error messages.

56 views3 min

Java

Spring Data JPA: Databases Made Easy (Beginner Guide)

Learn Spring Data JPA in Spring Boot: map classes to tables with @Entity, get full CRUD from an empty JpaRepository interface, and write queries just by naming methods.

54 views3 min

Java

Building a REST API with Spring Boot (Beginner Guide)

Build a complete CRUD REST API in Spring Boot: what REST means, mapping HTTP methods to CRUD, a full user controller, JSON handling, status codes, and clean layering.

61 views3 min

Java

Essential Spring Boot Annotations Explained (Beginner Guide)

A clear, grouped guide to the Spring Boot annotations you use every day: stereotypes, @SpringBootApplication, web mappings, and dependency injection annotations.

51 views3 min

Java

Build Your First Spring Boot App (Step-by-Step Beginner Guide)

Build and run your first Spring Boot web app step by step: Spring Initializr setup, the main class, a REST endpoint, running it, and fixing common first-timer errors.

63 views3 min