Tagged articles

Custom Implementation

2 articles · Page 1 of 1

Feb 7, 2026 · Backend Development

Stop Hand‑Coding Captchas: Complete Spring Boot Guide from Custom Logic to Hutool

This article explains why captchas are essential for login, registration and password‑reset flows, compares a fully custom Spring Boot implementation with the Hutool library, and provides step‑by‑step code, configuration and best‑practice recommendations for each approach.

Custom ImplementationHutoolJava

0 likes · 9 min read

Stop Hand‑Coding Captchas: Complete Spring Boot Guide from Custom Logic to Hutool

Rare Earth Juejin Tech Community

Jun 28, 2024 · Fundamentals

Handcrafting a Minimal Kotlin Coroutine Implementation

This article analyzes the shortcomings of existing Kotlin coroutine tutorials and presents a step‑by‑step guide to building a lightweight coroutine framework from scratch, covering thread basics, CoroutineScope, launch, delay, resume, state‑machine logic, withContext, async, and Deferred with complete code examples.

Asynchronous ProgrammingCoroutinesCustom Implementation

0 likes · 15 min read

Handcrafting a Minimal Kotlin Coroutine Implementation