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This article explains how to integrate WebSocket into a Spring Boot project to create a lightweight instant‑messaging system, covering dependency setup, configuration classes, core server implementation, required modules, common deployment issues, and practical solutions with complete code examples.
This guide shows how to integrate Spring Boot with the Model Context Protocol (MCP) to let large language models interact with existing services via natural language, covering entity definitions, Maven dependencies, configuration, tool annotations, and testing to create an AI‑enabled book management API.
This article demonstrates how to implement multi‑version REST APIs in Spring Boot 3 by leveraging @RequestMapping attributes such as headers, params, and consumes, providing complete code examples, request screenshots, and a custom HttpMessageConverter for Content‑Type based versioning.
This tutorial walks through designing a QR‑code login flow, defining a token table, outlining client and server roles, implementing two REST endpoints, configuring Spring Boot WebSocket support, and handling real‑time login notifications with Java and JavaScript code examples.
Concept Plugin 2 introduces a lightweight, annotation‑driven plug‑in system for Spring Boot that separates core business logic from device integration code, enabling independent testing, dynamic loading, and easy configuration through a management UI, while supporting various injection patterns, nested dependencies, and Spring features.
This article explains the various interception mechanisms in Spring Boot 3—including Filters, Spring Security filters, MVC Interceptors, AOP, ControllerAdvice, Request/ResponseBodyAdvice, and REST Clients—provides execution flow diagrams, detailed code examples, and practical usage tips for building robust backend applications.
This article introduces Jolt, an open‑source Java library for JSON‑to‑JSON transformation, explains its advantages over traditional hard‑coded conversion, demonstrates core operations and custom extensions with code examples, shows how to integrate it into Spring Boot, and outlines future plans for a visual drag‑and‑drop configuration tool.
This tutorial walks you through building a Spring Boot project that uses the easy-data-scope library to inject dynamic SQL for fine‑grained data permissions, covering database setup, Maven dependencies, core annotations, custom rule implementation, and practical query examples.
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This comprehensive guide explains the most common Spring Boot annotations—including request mapping, bean definitions, dependency injection, scopes, and auto‑configuration—providing clear examples and usage tips for Java backend developers.
This article presents a comprehensive guide to Spring Data JPA in Spring Boot 3, covering 131 practical cases, core repository interfaces, Specification and Criteria Builder techniques, and dozens of performance‑optimizing tips such as lazy loading, caching, batch processing, transaction management, projections, and stream queries.
This article introduces Liteflow, a lightweight yet powerful Java rule engine, explains its architecture, shows how to integrate it with Spring Boot, details its component types and EL rule syntax, and demonstrates a real‑world e‑commerce workflow using XML rule files.
This tutorial shows how to create a reusable BaseController in a Spring Boot application using MyBatis‑Plus, providing generic CRUD, list, pagination, and count endpoints for any entity while demonstrating utility methods, pagination configuration, and concrete controller extensions.
This guide explains how to use @PathVariable to capture URL segments, configure static resource mapping for local files, and centralize path values in Spring Boot applications, providing code examples for request mapping, resource handler registration, and property injection.
This article explains four practical ways to control the availability of Spring Boot controller endpoints at runtime—using @ConditionalOnProperty, a custom AOP annotation, a HandlerInterceptor, and a custom RequestMappingHandlerMapping—detailing code examples, configuration, advantages, and trade‑offs.
This article introduces the lightweight retrofit‑spring‑boot‑starter for Spring Boot, explains its key features such as custom OkHttpClient, annotation‑based interceptors, logging, retry, circuit‑breaker support, and shows step‑by‑step configuration, dependency setup, and code examples for building robust HTTP client services.
The article critiques overly large and tangled Spring MVC controllers, demonstrates ugly examples filled with try‑catch blocks, field validations, and business logic, then presents streamlined, elegant alternatives using @Valid, @Autowired, proper exception handling, and best‑practice guidelines to dramatically reduce code size and improve readability.
This guide explains why Spring Boot 3 is incompatible with Swagger 2, shows how to downgrade or replace dependencies, updates servlet imports, adjusts Maven and application settings, and provides a complete Swagger configuration to get the API docs running again.
This article walks through setting up a Java Spring Boot project, managing compatible Spring Cloud, Spring Boot and Kafka versions, handling common dependency pitfalls with Maven, and provides ready‑to‑use scaffolding code for exception handling, logging, CORS, Swagger, and response wrapping, plus a list of useful development tools.
This article explains how Spring Boot 3's BeanWrapper simplifies Java object property manipulation with detailed examples covering basic usage, map binding, nested objects, collections, custom type conversion, HTTP request binding, property access, and metadata extraction.