This article explains how to implement a SpringBoot HandlerInterceptor to perform login authentication, configure it with a whitelist, return a unified 401 JSON response, and extend it with Redis token validation, advanced usage, and a comparison with servlet filters.
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 the purpose and usage of Spring MVC’s HandlerMethodArgumentResolver and HandlerMethodReturnValueHandler extension points, demonstrates how to implement custom argument resolvers and return‑value handlers, discusses common pitfalls such as handler ordering, and shows how to replace the default processors to achieve unified request and response processing.
This guide explains how Spring Boot 2.4.12 automatically configures Spring MVC components such as view resolvers, converters, and message handlers, and shows how to customize them via WebMvcConfigurer, WebMvcRegistrations, HttpMessageConverters, and @JsonComponent, including code examples for full control over the Web MVC setup.
This article explains how to secure a SpringBoot web application by creating a login interceptor with the HandlerInterceptor interface, registering it via WebMvcConfigurer, managing user sessions, and demonstrates the complete code and verification steps to ensure authenticated access.
This article explains why browsers enforce the same‑origin policy, defines cross‑origin requests, outlines the restrictions of non‑same‑origin interactions, and presents five practical methods—including a global CorsFilter, WebMvcConfigurer, @CrossOrigin annotation, manual header setting, and a custom filter—to implement CORS in Java Spring backends.
This article explains the Same Origin Policy, introduces CORS as its solution, details the required response headers, and provides three practical ways—global configuration, servlet filter, and @CrossOrigin annotation—to enable cross‑origin requests in Spring Boot applications.
This article explains how to extend Spring MVC in Spring Boot by implementing WebMvcConfigurer, how the default auto‑configuration works, and why using @EnableWebMvc fully takes over MVC configuration, while also providing code examples and resource links for deeper learning.
