Learning objectives:

Adding database support in Spring Boot
Using the H2 Database
Using database annotations
Configuring your application to use H2 Console

Start from this:

-bash-4.2$ pwd
/u/dgerman/apache/htdocs/spring-boot/fall2019/step08
-bash-4.2$ tree .
.
+-- pom.xml
+-- src
    +-- main
        +-- java
            +-- com
                +-- example
                    +-- demo
                        +-- Person.java
                        +-- SpringBoot08Application.java

6 directories, 3 files
-bash-4.2$

You are creating a Spring Boot application that uses an in-memory database called H2 to store its data.

-bash-4.2$ pwd
/u/dgerman/apache/htdocs/spring-boot/fall2019/step08/src/main
-bash-4.2$ tree
.
+-- java
|   +-- com
|       +-- example
|           +-- demo
|               +-- Person.java
|               +-- SpringBoot08Application.java
+-- resources
    +-- application.properties

5 directories, 3 files
-bash-4.2$ pwd
/u/dgerman/apache/htdocs/spring-boot/fall2019/step08/src/main
-bash-4.2$ cat resources/application.properties
spring.h2.console.enabled=true
spring.h2.console.path=/h2-console
spring.jpa.hibernate.ddl-auto=create
spring.datasource.url=jdbc:h2:mem:testdb
spring.h2.console.settings.web-allow-others=true
-bash-4.2$

So after you make these changes what do you think you need to do?

First time around don't include the last line in application.properties. What happens?