Configuring Spring MVC with JSP, JSTL, Custom Tags, and JavaScript for a Seckill Application

The article walks through setting up a Spring MVC web application, starting with editing web.xml to register the DispatcherServlet and mapping it to the root URL.

It then presents a complete SeckillController implementation, including request mappings for listing items, showing details, exposing the seckill URL, executing the seckill, and retrieving server time, along with a generic SeckillResult DTO for JSON responses.

Next, the guide details the creation of JSP views for the list and detail pages, integrating Bootstrap for styling, and adding common header and tag library includes.

Because JSTL cannot directly format Java 8 LocalDateTime objects, the article shows how to create custom tag files ( localData.tag and localDataTime.tag ) to parse and format these dates, and how to use them in the JSP pages.

Finally, a modular JavaScript file ( seckill.js ) is introduced to handle client‑side logic such as phone validation, countdown timers, AJAX calls to the backend endpoints, and the seckill execution flow, resulting in a functional flash‑sale interface.