How do you configure a DataSource in Spring?

How do you configure a DataSource in Spring?

---

Dependency

Maven

<!-- pom.xml -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

<!-- https://mvnrepository.com/artifact/com.h2database/h2 -->
<dependency>
    <groupId>com.h2database</groupId>
    <artifactId>h2</artifactId>
    <version>1.4.200</version>
    <scope>runtime</scope>
</dependency>

Gradle

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'com.h2database:h2'
}

configuration properties

application.yml

spring:
  datasource:
    url: jdbc:h2:mem:mydb
    username: sa
    password: temppassword
    driverClassName: org.h2.Driver
  jpa:
    spring.jpa.database-platform: org.hibernate.dialect.H2Dialect

application.properties

spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.username=sa
spring.datasource.password=temppassword
spring.datasource.driverClassName=org.h2.Driver
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect