Resolving javax.servlet.Filter Class Location Issues in Spring Boot Applications

---

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---

Introduction

The Problem

Error Message Breakdown

The key part of the error message reads:

[[See Video to Reveal this Text or Code Snippet]]

Understanding the Cause

This issue arises from changes in the package structure of Java libraries starting with Jakarta EE and how Spring Security currently behaves:

Given that your project is running Java 17, the old dependencies could conflict with the new Java language structure.

Solution: Upgrade Dependencies

To resolve this issue, you have two main options depending on your project's needs:

Option 1: Upgrade Spring Security

[[See Video to Reveal this Text or Code Snippet]]

Ensure that all Spring Security-related dependencies are aligned to the same major version to avoid other compatibility issues.

Option 2: Downgrade Java or Spring Boot

If upgrading Spring Security is not an option for your project, you could always downgrade your Java version to Java 8. However, this approach is not recommended since newer versions provide significant improvements in performance and security.

Final Thoughts