How to do it...

Let's change the defaults in order to create an embedded H2 database that will not store data in-memory, but rather use a file to persist the data among application restarts, by performing the following steps:

1. Open the file named application.properties under the src/main/resources directory from the root of our project and add the following content:

spring.datasource.url = jdbc:h2:~/test;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE 
spring.datasource.username = sa 
spring.datasource.password = 

1. Start the application by executing ./gradlew clean bootRun from the command line
2. Check your home directory, and you should see the following file in there: test.mv.db