DBeaver

Loads the drivers automagically.

Reaching the internal H2 db is easy with DBeaver

Spring configs

spring.datasource.url=jdbc:h2:mem:dbname
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=mydbuser
spring.datasource.password=mydbpass
spring.jpa.hibernate.ddl-auto=create