Request Decryption

Selected Java Interview Questions

Dec 8, 2021 · Backend Development

Implementing Request Parameter Decryption with Servlet Filters in Java

This article explains how to create custom HttpServletRequestWrapper classes and servlet filters in Java to automatically decrypt or transform request parameters—such as converting email fields to lowercase—before they reach controller methods, covering both form/ajax and JSON payload scenarios with configuration examples for web.xml and Spring Boot.