How to Display Error Messages with Thymeleaf in Spring Boot Applications

Learn how to **show error messages** on your custom error page using **Thymeleaf** with **Spring Boot**. We explore the step-by-step solution to effectively handle errors in your application.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Thymeleaf + SpringBoot : show errors in Errors page

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Handling Errors in Spring Boot with Thymeleaf

When developing an application using Spring Boot and Thymeleaf, it's crucial to handle errors gracefully. Users should be informed about any issues that arise, and developers should be able to diagnose problems easily through error messages. Unfortunately, many users encounter difficulties in displaying error messages effectively in their applications. If you find yourself unsure of how to implement custom error pages with Thymeleaf, you're not alone. In this guide, we’ll guide you through the process of creating a functional error page that displays useful error messages to the users.

Understanding the Problem

As developers, we often rely on Spring Boot's built-in error handling. By default, Spring Boot provides a /error mapping where it forwards all exceptions and errors. While this works well, you may need a more user-friendly way to showcase error details through a custom error page using Thymeleaf. The provided HTML structure in your project is not displaying exceptions as expected, and it is essential to troubleshoot and enhance this functionality.

Solution Overview

We will tackle the problem step by step. Here’s what you need to do to effectively show error messages on your error page:

Step 1: Create a Custom Error Page

First, you need to create a custom error page template in your Spring Boot application. To do this:

Navigate to src/main/resources/templates/ directory.

Here's a basic example of what your error template might look like:

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

Step 2: Configure the Error Controller

Next, you will need to create an error controller to route to your custom error template. You can do this by creating a class that implements the ErrorController interface:

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

Step 3: Enable Stacktrace Inclusion

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

This line ensures that any exceptions thrown within your application will be included in your Thymeleaf model, which you can then display on your custom page.

Conclusion

By following these steps, you can effectively show error messages in your Spring Boot application using Thymeleaf. The custom error page provides valuable feedback for users and allows developers to diagnose issues more efficiently. Don't forget to test various edge cases to ensure that your error page displays correctly for all error scenarios. Happy coding!