I want to configure a tomcat data source in Spring Boot, The properties of the database are stored in another property file (Say dbConnection.properties) with different keys.

For example

dbConnection.properties:

DATABASE_URL=SomeURL
DATABASE_USER=SomeUser
DATABASE_PASSWORD=SomePassword

From what I understand the properties related to a data source must be specified in application.properties as:

spring.datasource.url=jdbc:mysql://localhost/test
spring.datasource.username=dbuser
spring.datasource.password=dbpass

How do I pass the values from dbConnection.properties to application.properties?