Snacks
How to Fix "Cannot Convert String to JSON Object" Error in Kotlin Spring Boot
Learn how to properly handle JSON string conversion errors in Kotlin Spring Boot applications with practical solutions and best practices
QDS
Snack
How to Add Values to HashMap in Kotlin
Learn the different ways to add values to a HashMap in Kotlin, including put(), plusAssign, and bracket notation. Complete with practical examples.
Testing
Getting Started with Unit Testing in Kotlin Spring Boot Applications
Learn how to write effective unit tests for your Kotlin Spring Boot application using JUnit 5 and Mockito, with practical examples and best practices
Kotlin Basics
Interface Intersection Types by Delegation in Kotlin: A Clear Guide
Master Kotlin's interface delegation pattern with clear examples and best practices. Learn how this powerful feature improves upon Java's interface implementation approach.
Spring Data
Understanding @Transactional in Spring Boot with Kotlin: A Deep Dive
Learn how @Transactional works in Spring Boot with Kotlin, from basic usage to advanced scenarios. Master isolation levels, propagation, read-only optimizations, and best practices with practical examples
Thymeleaf
Understanding Thymeleaf Syntax and Expressions in Spring Boot with Kotlin
Discover how to effectively use Thymeleaf expressions in your Spring Boot applications. This comprehensive guide covers everything from basic variable expressions to advanced preprocessing, with real Kotlin examples and proven best practices for production applications.
Thymeleaf
Understanding and Using Thymeleaf Fragments in Spring Boot with Kotlin
Master Thymeleaf fragments to build maintainable Spring Boot templates with Kotlin. This comprehensive guide covers everything from basic fragment creation to advanced techniques like parameterized fragments and layout templates, complete with real-world code examples.
common-problems
Fixing Spring Configuration Issues in Kotlin: The Final Class Problem
Learn how to fix the 'Classes annotated with @Configuration must not be final' error in Kotlin Spring Boot applications using kotlin-allopen plugin. Complete guide with Maven & Gradle examples.
rest
Error Handling Best Practices in Spring Boot with Kotlin
Master Spring Boot error handling in Kotlin with comprehensive examples: learn to implement global exception handlers, custom error responses, and production-ready error handling strategies
Security
Role-Based Access Control (RBAC) in Spring Security with Kotlin
Master Role-Based Access Control (RBAC) in Spring Boot applications using Kotlin with practical examples, from basic setup to advanced configurations with method-level security
Security
Implementing API Key Authentication in Spring Boot with Kotlin: A Complete Guide
Learn how to implement secure API key authentication in Spring Boot with Kotlin, including rate limiting, monitoring, and production-ready best practices - complete with practical examples and ready-to-use code
Security
Why You Should Disable CSRF Protection for REST APIs in Spring Boot (And How to Do It Right)
Learn why CSRF protection isn't necessary for most REST APIs and how to properly disable it in Spring Boot while maintaining security. Includes code examples and best practices