Full-stack Java development with Vue 2/3 front-end suite; hands-on examples and source code analysis for Spring, Spring Boot 2/3, and Spring Cloud.
This article compares five major Java database access technologies—JDBC, Hibernate, Spring Data JPA, JOOQ, and MyBatis—detailing their code examples, strengths, weaknesses, and ideal use cases, while also offering a downloadable Spring Boot 3 case collection PDF for hands‑on practice.
This article examines five frequent Redis cache anti‑patterns—cache avalanche, unbounded local cache, stale data, missing invalidation, and oversized objects—explaining their pitfalls with code examples and showing concrete fixes that dramatically improve latency, throughput, and memory usage.
This article presents a comprehensive guide to generating PDF documents in Spring Boot 3 applications using iTextpdf and Thymeleaf, covering environment setup, Maven dependencies, data model, HTML template design, controller implementation, and a test case that produces a correctly rendered PDF with external CSS and images.
This article explains why null references cause NullPointerExceptions in Java and presents modern techniques—such as using Optional, fail‑fast checks, builders, records, the Null Object pattern, and utility libraries—to write safer, more expressive backend code.
This article introduces dynamic SQL techniques for Spring Boot 3, compares JPA and MyBatis implementations, and demonstrates how the powerful jpa-search-helper library simplifies complex queries with both map‑based and JSON‑based modes, including pagination and sorting examples.
This article introduces Spring Expression Language (SpEL) for Spring Boot 3, explains its core features such as collection filtering, projection, Elvis and safe navigation operators, method and bean references, regular‑expression handling, and arithmetic expressions, and provides complete runnable code examples demonstrating each technique.
This article walks through Spring Boot 3's powerful annotation‑based parameter validation, covering basic constraints, custom validators, group validation, nested objects, method‑level checks, internationalized messages, programmatic validation, composite annotations, and cross‑field verification with complete code examples.
This article demonstrates how to implement a lightweight circuit‑breaker mechanism in Spring Boot 3 by defining a custom @Breaker annotation, a failure‑tracking component using LongAdder, and an AOP aspect that handles opening, probing, and fallback logic without external libraries.
This article walks through building a robust, long‑running order‑processing workflow in Spring Boot 3 using the open‑source Temporal workflow engine, covering environment setup, Maven dependencies, configuration, workflow and activity definitions, service and controller code, and testing of retry and recovery features.
This article explains how to use JAXB with Spring Boot 3 for XML binding, custom adapters, schema generation, validation, and seamless integration, providing step‑by‑step code examples and best‑practice tips for handling XML in Java backend applications.
