Spring Boot Filters | FilterChain, Logging, Auth & Request Flow | Spring Boot Full Course #19

In this video, we will understand Filters in Spring Boot from scratch and see how they work inside the complete request–response flow. Filters allow us to run common logic before a request reaches the controller and after the response is generated. They are commonly used for request logging, authentication checks, response headers, execution-time tracking, security checks, encoding, and blocking invalid requests. In this video, you will learn: Why Filters are needed Cross-cutting concerns in web applications Complete Spring Boot request–response flow Where Filters execute before DispatcherServlet How to create a custom Filter Understanding the doFilter() method Role of FilterChain How to continue or block a request Reading request headers, URLs, methods, and IP addresses Returning custom JSON responses from a Filter Logging request and response details Measuring API execution time Running multiple Filters in the correct order Understanding @Order Important security and logging best practices When to use Filters and when not to use them By the end of this video, you will clearly understand how Filters work internally and how they help keep controllers clean and reusable. This video is part of our complete Spring Framework and Spring Boot series, where we are learning backend development step by step from the fundamentals. Subscribe to the channel and continue learning Java Backend Development with us. JAVA Beginner to Advance Series :    • Java Full Course 2026   Join System Design WhatsApp Group: https://www.whatsapp.com/channel/0029... Code and Notes: Github : https://github.com/adityatandon15/Spr... We have paid courses on DSA, Web Development , Blockchain, System Design & GenAI. Join Courses: https://strikes.in/ Coder Army Website: https://coderarmy.in/#home Coder Army App: https://play.google.com/store/apps/de... Connect with Aditya Tandon Instagram :   / adityatandon2   LinkedIn :   / adityatandon2   Twitter : https://x.com/adityatandon02 Timestamps: