Install JDBC package
For Tomcat:
A guide to install a JDBC packe for Oracle on your Tomcat.
Download JDBC for Oracle. You now got a file like ojdbc14.jar or classes12.zip or something similar.
Place the file in yor %tomcat_home%\shared\lib folder. Restart Tomcat. The driver is now accessible by all contexts.
For Windows:
If you want a jdbc connection in your "windows" application, you need to register the .jar or .zip file in your environment variables.
Go to the "System properties" -> "Advanced" -> "Environment variables"
In the CLASSPATH you can add "C:\java\ojdbc14.jar;"
Make sure your paths is separated by ;
Now the JDBC driver is registert in windows.