Скачать или смотреть Resolving the java.sql.SQLException: Access Denied Error in Spring Boot with MySQL

Learn how to fix access denied errors in Spring Boot when connecting to a MySQL database. Easy steps to configure your application.yml for a successful database connection!
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This video is based on the question https://stackoverflow.com/q/70194526/ asked by the user 'Douko' ( https://stackoverflow.com/u/17568155/ ) and on the answer https://stackoverflow.com/a/70194557/ provided by the user 'ganlana' ( https://stackoverflow.com/u/16998887/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the java.sql.SQLException: Access Denied Error in Spring Boot with MySQL

Connecting your Spring Boot application to a MySQL database can sometimes lead to annoying challenges, especially when it comes to authentication issues. If you have encountered the error message saying, "Access denied for user 'root'@ 'localhost' (using password: YES)," don't worry—this guide will provide you with a clear and easy-to-follow solution.

Understanding the Problem

When you see an error like:

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

this typically indicates one of the following issues:

Incorrect username or password combination for the database.

The user does not have the right privileges to access the specific database.

Configuration errors in the application properties file (in this case, application.yml for Spring Boot).

Given that you've confirmed your username (root) and password (011575), the most likely culprit in this scenario is a configuration issue with how you are passing your password in the application.yml file.

The Solution: Modifying Your application.yml

It turns out that when Spring Boot reads data from a YAML file like application.yml, it can misinterpret certain values that start with 0. Therefore, if your password starts with a 0, as in your case—011575—Spring Boot may not correctly interpret it as a string. Here's how to resolve this.

Step-by-Step Fix

Locate Your application.yml File:
Find the application.yml file in your Spring Boot project. This is where you define your database connection properties.

Update the Password Format:
Change the password declaration as follows:

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

Why This Works

By enclosing the password in quotes ("011575"), you are explicitly telling Spring Boot that this is a string value that should not be misinterpreted as a numeric data type. This small change could be the key to successfully connecting to your MySQL database without further access issues.

Conclusion

Database connection errors can be frustrating, but understanding how your configurations work is crucial to resolving these issues. If you follow the steps outlined in this post, you should be able to fix the Access denied for user 'root'@ 'localhost' error efficiently.

Always ensure your database credentials are correctly defined, and when in doubt, encase them in quotes to guarantee they are interpreted as strings. Happy coding, and good luck with your Spring Boot project!