Why we do not mentioned driver name in application.properties in spring boot when trying to connect database like oracle?

Question

I have seen if we declare below three properties in the application. properties in spring boot , we are able to connect the oracle database through spring data jpa

spring.datasource.url= jdbc:oracle:thin:@localhost:1521:orcl

spring.datasource.username=SYS as SYS DBA

spring.datasource.password=root

My Question is why we are not providing driver name here. IS this something that It is automatically mapped the driver name here?

Answer 1

from documentation Connection to a Production Database

You often do not need to specify the driver-class-name, since Spring Boot can deduce it for most databases from the url

Answer 2

This @EnableAutoConfiguration annotation does the magic..Spring boot scans the pom.xml and build your project based on dependency added. So if you add oracle dependency then it will configure oracle driver for you.

Answer 3

Spring can infer from spring.datasource.url about which driver should be used.

Spring document says that :

You often do not need to specify the driver-class-name, since Spring Boot can deduce it for most databases from the url.

For a pooling DataSource to be created, we need to be able to verify that a valid Driver class is available, so we check for that before doing anything. In other words, if you set spring.datasource.driver-class-name=com.mysql.jdbc.Driver, then that class has to be loadable.