handling DataAccessException

[lescorido]

public void updateMethod(byte[] b) {
try {
JdoTemplate jdoTemplate = getJdoTemplate();

...update statements...

jdoTemplate.flush();
}
catch(DataAccessException dae) {
...msg is displayed in the page..
System.out.println ("DataAccessException...");
}

}

this method accepts a csv file and save the records in the db.
If there is an invalid record, the transaction is rolled back so no records were added.
DataAccessException is caught & a msg is displayed in the page.
However, a nested exception error is still printed in the console.
Why is a nested exception still appears or what causes it? and more importantly, how to stop error msg from being printed into the console..?

console:
DataAccessException...
org.springframework.orm.jdo.JdoResourceFailureExce ption: The transaction has been rolled back. See the nested exceptions for details on the errors that occurred.; nested exception is kodo.util.FatalDataStoreException: at......
at....

[Rod Johnson]

Configure your logging system properly. Spring uses Commons Logging. Normally you use log4j underneath and should have an appropriate log4j.properties file that does *not* print to the console and suppresses any messages you want suppressed.

[lescorido]

Thanks for the reply.
I'll read on configuring log4j.
You may have known some good materials I'll greatly appreciate it.