===>MySql Connector

spring.datasource.url=jdbc:mysql://localhost:3306/springboot_codebuffer
spring.datasource.username=root
spring.datasource.password=Dgsh@12345
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect

or

spring.datasource.url=jdbc:mysql://localhost:3306/employee_system
spring.datasource.username=root
spring.datasource.password=Dgsh@12345
spring.jpa.hibernate.ddl-auto=update
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.show-sql=true