I want to connect to Oracle Database without Oracle Client. After searching that how can I do this, I figure out I must use Oracle Instant Client. But how can I use this? I cant find something about that.
The recommended (and most frequently used) JDBC driver for Oracle is the "thin driver". It doesn't need anything installed on the client (and is free).
This FAQ might be useful : http://www.orafaq.com/wiki/JDBC