(Spring Boot and H2) Can't use h2 database

Question

I'm learning Spring boot and I'm trying to create a very simple RESTful API that access an in-memory database and perform CRUD actions.

However, everytime I try to Connect or Test Connection on http://localhost:8080/h2-console , I get this error:

"Database "C:/Users/XXX/test" not found, and IFEXISTS=true, so we cant auto-create it [90146-199] 90146/90146"

https://imgur.com/a/oYgkK1C

I followed EXACTLY the instructions from http://www.springboottutorial.com/spring-boot-crud-rest-service-with-jpa-hibernate . I have tried everything I could find online: using jdbc:h2:mem:test as JDBC URL etc, but none of them worked for me and I'm not sure what am I doing wrong. I didn't install h2 database from the official website as I read it is not necessary to use the in-memory module (and I still don't know if I should've installed it or not, as there is not a single mention of it online, as far as I checked).

Any thoughts? I'm a beginner when it comes to Spring Boot and I'm really lost. I just want to test CRUD actions and I don't care about the persistence of the DB.

I have provided my application.properties below.

Thank you: :)

# H2
spring.h2.console.enabled=true
spring.h2.console.path=/h2

# Datasource
spring.datasource.url=jdbc:h2:mem:test
spring.datasource.username=user
spring.datasource.password=user
spring.datasource.driver-class-name=org.h2.Driver

Answer 1

Make sure your url in h2-console(refer screenshot below) is same as your ' spring.datasource.url=jdbc:h2:mem:test '.

It worked for me.

UPDATE : Other alternative solution is, you can avoid setting spring.datasource.url property. Spring will automatically set this default JDBC url for you.

happy learning.. Upvote, if it is sovled your issue.

Answer 2

In your spring application.properties file, set the property spring.datasource.url=jdbc:h2:~/test

Then restart the application and open http://localhost:8080/h2-console/ Click on Test Connection button, you should see "Test successful".