I’m trying to load environment variables from a .env file in my Spring Boot app using:

implementation 'io.github.cdimascio:java-dotenv:5.2.2'   

Here’s part of my application.properties:

spring.datasource.url=${DB_URL} spring.datasource.username=postgres spring.datasource.password=${DB_PASSWORD} stripe.api.key=${STRIPE_API_KEY}

My .env file:

DB_URL=jdbc:postgresql://localhost:5432/mydb DB_PASSWORD=mysecretpassword STRIPE_API_KEY=my_stripe_key

The environment variables are not being loaded into application.properties when I run the app, and I get errors like:

URL must start with 'jdbc'

I tried putting .env file is in the root directory and the Dotenv class reads the variables correctly in the main method.

How can I properly load the .env variables into Spring Boot’s application.properties using java-dotenv?

I wanted the .env to work and connect but it wont.