How to allow user to configure database connection parameters in Servlets/JSP project?

I'm creating a simple Servlets/JSP based web app which connects to a MySQL database. Previously I had created a ConnectionParams class and a DBConnection class. ConnectionParams class contains hard-coded DB host, username, and password. DBConnection creates a JDBC connection based on it which is then used for database operations.

I realized the issue while deploying it to a test environment which has a separate DB of its own, and the DBA may change username/password etc. So I created a separate text file with these details as WEB-INF\dbConfig.txt. This contains the info as:

dbName=mydbschema
dbUser=myuser
dbPass=mypass
dbType=mysql

The user has to edit the file in <TOMCAT HOME>\Webapps\myproject\WEB-INF everytime the server restarts. Everytime the main servlet starts, it reads the file and stores a global ConnectionParams object. I can see that this is definitely not the best practice.

I'm looking for a more robust solution for the same.

Please edit the question if you think it is not properly worded. Add comments if I should add more details.