Understanding Spring MVC Interceptors When building web applications with traditional JavaEE filters, developers often encounter a limitation. Filters execute before the Servlet layer, which means with Spring MVC's single entry point (DispatcherServlet), a filter would intercept all incoming request...
MVC Architectural Pattern MVC divides application logic into three interconnected components: Model (M): Represents JavaBeans handling data. Two primary types exist: Entity Beans: Store business data (e.g., Customer, Product). Businses Logic Beans: Handle service and data access operations (e.g., Se...
Custom Servlet Implementation package com.example.web.component; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; public class CustomHttpServlet exten...
Integrating Spring, Spring MVC, and MyBatis requires a layered configuration approach where the root application context manages bussiness logic and persistence, while the child web context handles HTTP routing and controller execution. This annotation-driven architecture eliminates legacy XML descr...
Servlet 3.0 Container Initialization Servlet 3.0 introduced the capability to initialize the ServletContext without using web.xml. The specification provides the ServletContainerInitializer interface, which containers automatically discover and invoke during startup. Spring 3.1+ provides SpringServl...
Core Mechanism of View Resolution in Spring MVC Spring MVC supports customizable view components. The framework allows developers to configure different view technologies through XML configuration. For instance, when using Thymeleaf as the template engine, the following setup is typically defined in...
This article delves into the implementation and underlying source code of Spring Boot interceptors, examining their role in request processing. We'll explore how to configure and utilize them, and trace their execution flow from request reception to response generation. Configuring Interceptors To i...
Handling Standard Form Parameters A basic HTML form submits data using URL-encoded parameters. The input field name attributes determine the parameter names transmitted to the server. <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Role Management&...
When a controller method processes a request, Spring MVC provides multiple approaches to handle the repsonse. Void Return Type @RequestMapping("/processVoid") public void handleVoidRequest() throws Exception { System.out.println("Void handler method executed"); } When a controlle...
Spring MVC applications categorize errors into two types: checked exceptions and runtime exceptions. Checked exceptions are typical handled via try-catch blocks, while runtime excpetions are minimized through robust coding practices and testing. When exceptions occur in DAO, service, or controller l...