... It's been a while I hadn't had to do it. Hence: a reminder on how a JDBC connection string looks like for Oracle:
Here's the template:
jdbc:oracle:{driver:variants:thin:Thin=thin,OCI=oci,OCI8=oci8}:[{user}[/{password}]]@//{host::localhost}?[:{port::1521}]/{service:identifier:XE
...and here's an example:
jdbc:oracle:thin:myuser/mypwd@localhost:1521:XE