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Programmer Null's Self-Cultivation
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Programmer Null's Self-Cultivation

Focused on backend development technologies and sharing knowledge from programming project experiences.

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Recent Articles

Latest from Programmer Null's Self-Cultivation

4 recent articles
Programmer Null's Self-Cultivation
Programmer Null's Self-Cultivation
Jul 13, 2025 · Backend Development

Unlocking the Secrets of Java’s ConcurrentHashMap: From JDK 7 to JDK 8

This article provides a comprehensive, step‑by‑step analysis of Java's ConcurrentHashMap, covering its evolution from JDK 7’s segment‑lock design to JDK 8’s bucket‑level CAS and synchronized approach, complete with macro diagrams, microscopic source‑code walkthroughs, hash calculations, resizing mechanisms, and practical usage tips.

ConcurrentHashMapHashMapJDK7
0 likes · 16 min read
Unlocking the Secrets of Java’s ConcurrentHashMap: From JDK 7 to JDK 8
Programmer Null's Self-Cultivation
Programmer Null's Self-Cultivation
Jul 2, 2025 · Cloud Native

What Makes Spring Cloud the Ultimate ‘Full‑Stack’ for Microservices?

This article provides a comprehensive overview of Spring Cloud, explaining its two generations (Netflix and Alibaba), versioning scheme, core components such as Eureka, Ribbon, Hystrix, Feign, Gateway, Config, Bus, Nacos, Sentinel and Seata, and compares the capabilities of the two implementations for building cloud‑native microservice systems.

Cloud NativeMicroservicesSpring Boot
0 likes · 24 min read
What Makes Spring Cloud the Ultimate ‘Full‑Stack’ for Microservices?
Programmer Null's Self-Cultivation
Programmer Null's Self-Cultivation
Jul 10, 2024 · Information Security

Master Shiro Security: From Basics to CAS SSO Integration with SpringBoot

This comprehensive guide walks you through Shiro's core concepts, authentication and authorization mechanisms, various realm implementations, session management, distributed session handling with Redis, caching strategies, and step‑by‑step integration of CAS single sign‑on using SpringBoot and pac4j, complete with code samples.

CASJavaShiro
0 likes · 34 min read
Master Shiro Security: From Basics to CAS SSO Integration with SpringBoot