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Mastering Java Web Development: An In-Depth Journey into Filter, Dispatcher Servlet, Interceptor, and Controller
Introduction:
Java web development, a dynamic and expansive field, demands a deep understanding of various components for creating robust, scalable, and maintainable applications. This article is a comprehensive guide, delving even further into Filter, Dispatcher Servlet, Interceptor, and Controller in the context of web applications. With an extended exploration, we aim to equip developers with not just an understanding but a mastery of these crucial elements. Accompanied by extensive code examples, this knowledge empowers developers to navigate the intricate landscape of Java web development with confidence and expertise.
Filter:
Filters, positioned as the initial defense in Java web applications, are instrumental in intercepting and processing requests and responses before they reach the servlet or any other component. Their versatility enables developers to implement a myriad of tasks, including authentication, logging, input validation, and more. Operating at a low level in the request-processing chain, filters offer an ideal space for pre-processing tasks.
To illustrate the flexibility of filters, let’s explore a scenario where a custom filter is employed to enhance security…