This post is older than a year. Consider some information might not be accurate anymore.
If CLASSPATH
exists; the driver is appended. For Windows:
SET ORACLE_JAR=C:\Data\lib\db\ojdbc6-11g.jar
SET CLASSPATH="%CLASSPATH%;%ORACLE_JAR%"
ECHO %CLASSPATH%
"C:\Data\lib\db\ojdbc6-11g.jar"
For Linux:
export ORACLE_JAR=/opt/lib/db/ojdbc6-11g.jar
export CLASSPATH="$ORACLE_JAR:$CLASSPATH"
# check setting
echo $CLASSPATH