This article explains how to add multipart file‑upload support to Spring Cloud Feign by extending the client with feign‑form, configuring the server side with a Spring MVC controller, and providing a complete Java example with dependencies, client configuration, and a JUnit test.
This article demonstrates how to implement page-based data retrieval in a Java web application using Spring MVC, MyBatis, and a custom Page utility class, covering the creation of the pagination class, mapper XML, DAO interfaces, service logic, controller handling, and JSP pagination controls.
This article explains how Spring MVC uses annotations such as @RequestMapping, @PathVariable, @RequestParam and @CookieValue to map URLs, retrieve parameters, implement RESTful CRUD operations via hidden method filters, and provides complete code examples for each scenario.
This tutorial walks through creating a Maven project in IntelliJ IDEA, configuring Maven settings, adding required dependencies, setting up Spring, MyBatis, FreeMarker, Log4j, and web.xml, and integrating Spring MVC to build a complete SSM framework application.
This tutorial walks through setting up a Spring MVC environment with Eclipse, Tomcat, and JDK, importing required JARs, configuring web.xml and springmvc.xml, writing a HelloWorld controller, creating JSP views, and handling common issues such as static resource mapping and server integration.
This guide walks you through installing and configuring the ELK stack (Elasticsearch, Logstash, Kibana), setting up the required environment, creating Logback and Logstash configurations, and integrating them with a Spring MVC application to collect and visualize Java logs in Kibana.
This article explains the difference between synchronous and asynchronous request handling in web servers, demonstrates how Spring MVC leverages DeferredResult and WebAsyncTask for non‑blocking processing, and shows practical code for timeout and exception management in Java backend applications.
This guide walks through integrating QQ login into a Spring MVC Java application, covering environment setup, domain and callback configuration, SDK deployment, common pitfalls like non‑80‑port issues, configuration file settings, Maven dependency handling, SSL fixes, and provides a complete controller example.
This tutorial explains why Dubbo was created for large‑scale distributed services, how it solves URL management, load‑balancing and capacity‑planning challenges, and provides step‑by‑step instructions for integrating Dubbo with Zookeeper, dubbo‑admin, and Spring MVC using Maven and Java code.
This article explains how browsers cache resources, the role of HTTP response headers such as Last-Modified, Expires, Cache-Control, ETag, and Age, and provides practical examples of controlling cache behavior with Spring MVC code and detailed Nginx configuration for both static and proxy caching.
This article introduces JSR‑303 Bean Validation, lists required JARs, explains core constraint annotations for null, boolean, size, date, and numeric checks, and provides complete Java code examples demonstrating how to apply and test these validations in a Spring MVC environment.
This comprehensive guide explains what Spring is, its advantages, core modules, container architecture, bean factories, dependency injection types, bean scopes, lifecycle, AOP concepts, MVC framework, data access support, and transaction management, providing a solid foundation for Java backend development.
The article explains how a Spring MVC service bean was duplicated across root and child WebApplicationContexts, causing a null‑injected instance that triggered a NullPointerException, and shows how JMap and JHat were used to locate the two beans and resolve the issue by adjusting component‑scan filters or removing the @Service annotation.
This article explains how Spring MVC integrates web capabilities by configuring web.xml, initializing the root WebApplicationContext via ContextLoaderListener, creating a child context for DispatcherServlet, and managing the hierarchical relationship between the two contexts to share beans across a Java web application.
