Скачать или смотреть Resolving Tomcat Embed Not Working Issue in Spring Boot 3.0.0 M3

This guide provides a step-by-step solution to the common issue of Tomcat embed dependencies not being recognized in Spring Boot 3.0.0 M3 projects.
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Troubleshooting Tomcat Embed Not Working in Spring Boot 3.0.0 M3

If you're embarking on your journey to master Spring Boot, you may have encountered some hurdles along the way, particularly while working with Tomcat embed dependencies in your pom.xml file. In this guide, we will walk you through a common issue—getting Tomcat embed to work seamlessly with your Spring Boot application—and the straightforward solution to this problem.

The Problem: Dependency Not Found

Recently, a developer following a Udemy course ran into the following error message when trying to include a Tomcat embedded dependency in their pom.xml file:

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

This error typically indicates that Maven is unable to find the specified dependency within its available repositories, leading to build failure and frustration.

Understanding the Dependency

The problematic dependency in question looks like this in the pom.xml file:

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

The purpose of this dependency is to allow your Spring Boot application to leverage JavaServer Pages (JSP) for rendering HTML content dynamically. Establishing this connection is crucial for developing comprehensive web applications using the Spring framework.

Solution: Adjusting Your pom.xml

To resolve the dependency issue, here are the steps you need to follow:

Step 1: Remove Repository Configurations

The first solution involves stripping down any manually added repositories in your pom.xml file. In particular, find and remove the following section:

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

Step 2: Clean and Rebuild Your Project

After making this change, clean your project and rebuild it. This process prompts Maven to fetch the required dependencies from the Maven Central Repository, which contains a wider range of artifacts and is usually where the Tomcat embed dependencies can be found.

Step 3: Verify Your IDE Settings

Ensure that your project settings in IDE (in this case, IntelliJ) are correctly configured to use the Maven build process. This includes checking the following:

You have the correct JDK version selected (Java 18, as mentioned).

The Maven home directory is set correctly.

Step 4: Running Your Application

Once you've made the changes and rebuilt your project, attempt to run your Spring Boot application again. You should find that the Tomcat embed dependency is now recognized, enabling you to utilize JSP pages without any hitches.

Conclusion

Dependency management is a common pitfall for beginners in the Spring Boot ecosystem. Understanding how Maven retrieves dependencies and making minor adjustments to your pom.xml configuration can save you significant time and headaches. Always remember to check available repositories when dependencies are not found, as Maven Central usually hosts most required packages!

With these steps, you should now be able to resolve the issues with the Tomcat embed not working in your Spring Boot application and continue your development journey with confidence. Happy coding!