Java Database Connectivity (JDBC)

By using Tomcat JNDI, database url information needs to be hardcoded in server.xml file according to the documentation. Is there a way to change the URL information in the code dynamically if necessary?

And also we need multiple connection pools and the connection information about those pools are only known during run time. So the TOMCAT JNDI is still the right way to go???

By the way, does anybody ever use tomcat DBCP package to get datasource and set url dynamically?

Thanks in advance.