Problem with java in crontab

Hello everybody, I have made a java program which runs when i do :

java telemesures

But when i want to put it in a cron i do

/j2sdk1.4.1/bin/java -cp :/web/WEB-INF/classes/Dany4/ telemesures

i have got

 Exception in thread "main" java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver         at java.net.URLClassLoader$1.run(URLClassLoader.java:198)         at java.security.AccessController.doPrivileged(Native Method)         at java.net.URLClassLoader.findClass(URLClassLoader.java:186)         at java.lang.ClassLoader.loadClass(ClassLoader.java:299)         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)         at java.lang.ClassLoader.loadClass(ClassLoader.java:255)         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)         at java.lang.Class.forName0(Native Method)         at java.lang.Class.forName(Class.java:140)         at telemesures.migration_telemesures(telemesures.java:26)         at telemesures.main(telemesures.java:66) 

I don't know why it doesn't run when i do this command. It looks like the impoted packages are not imported... Thanks for help

You need set CLASSPATH before run the java command,
such as:

export CLASSPATH=$CLASSPATH:ojdbc5.jar ; /j2sdk1.4.1/bin/java -cp :/web/WEB-INF/classes/Dany4/ telemesures

ojdbc5.jar ? I don't know if i have it. I just import java.sql.*, java shouldn't know where is it ?

export CLASSPATH=$CLASSPATH:/web/WEB-INF/classes/oracle/jdbc/
/j2sdk1.4.1/bin/java -cp :/web/WEB-INF/classes/Dany4/ telemesures

Don't work ...