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 details ten deprecated Spring Boot patterns — from field injection and @Value overuse to WebSecurityConfigurerAdapter and RestTemplate — and shows the recommended modern alternatives for Spring Boot 3.x and 4.x migrations.
This article demonstrates how to intercept and log SQL statements, parameters, and execution times in Spring Boot 3.5 by wrapping the DataSource with a proxy using the datasource-proxy library, without modifying any business code.
The article demonstrates how to correctly apply the DRY principle by refactoring seven duplicated notification service classes in Spring Boot 3.5.0 using the template method pattern and a NotificationMessage value object, consolidating 40 lines of repeated validation, logging, and error handling into a single abstract base class.
This tutorial demonstrates how to create a custom @ConvertJson annotation in Spring Boot 3.5.0 that automatically fetches JSON from a URL parameter and converts it into a typed Java object, using HandlerMethodArgumentResolver and BeanPostProcessor for both method-parameter and field-level injection with SpEL support.
This tutorial demonstrates how to replace auto-increment IDs with UUIDv7 in Spring Boot 3.5 using JPA and MyBatis-Plus, covering UUIDv7's timestamp-based structure, the java-uuid-generator library, and custom identifier generator implementations for both persistence frameworks.
This article details 10 practical message queue scenarios for Spring Boot microservices, covering system decoupling, asynchronous processing, traffic shaping for flash sales, data synchronization, centralized logging, broadcast configuration updates, ordered message processing, delayed messages for timeouts, retry mechanisms with dead-letter queues, and transactional messaging for distributed consistency, with code examples for RabbitMQ, Kafka, and RocketMQ.
The article explains why notification services are hard—slow delivery, unreliable third‑party providers, and status tracking—and shows how to solve these issues by fully decoupling the API from workers using a message queue, with detailed Spring Boot code examples and scaling strategies.
The article demonstrates how Hibernate 7.4, used with Spring Boot 3.5, adds built‑in support for safe pagination of collection fetches, temporal history tables, and native audit tables, all configurable via a single annotation and a few properties, with concrete code examples and runtime screenshots.
Spring Boot 4.1 adds the functional interface InetAddressFilter, enabling HTTP clients to block or allow requests based on IP ranges; the article shows how to configure the filter as a bean, apply it to RestClient/WebClient, and verify that internal‑network SSRF attempts are prevented.
The article explains how Spring Boot 4.1’s new spring.datasource.connection-fetch setting can delay acquiring a physical database connection until a SQL statement is executed, reducing unnecessary connection usage in high‑traffic scenarios and improving overall system concurrency.
