How To Test a spring.datasource.url like jdbc:mysql://localhost:3306/my_table :

git clone https://github.com/julianhyde/sqlline && cd sqlline
mvn package -Dmaven.test.skip=true
cp .../mysql-connector-java-5.1.40.jar target/
export CLASSPATH=$PWD/target/sqlline-1.4.0-SNAPSHOT-jar-with-dependencies.jar:$PWD/target/mysql-connector-java-5.1.40.jar
bin/sqlline
!connect jdbc:mysql://localhost:3306/my_table $user $password