Proper Setup of my DataBase Access

Question

We are currently building our first datalayer for use on Weblogic Portal. This datalayer is connecting to SQL Server. We are connecting via JNDI name cal.
At this stage we have successfully built a successful SQL Select statement call and what I believe to be a clunky stored procedure call.
I am trying to find a tutorial on the proper way to build my data-access functions.
How do I create a nice generic stored procedure call. This function should take a stored procedure name and an array of parameters. Currently I created my call signature too closely integrated into my business logic. In our .NET version data layer we would pass a hashtable consisting of parameter names and values. Missing parameters would be used as defaults by the stored procedure. But this same style would seem to cause a problem in the JAVA world, given the string building nature of the call.
Once again my goal is to have a generic database utility class that would allow for query and execute calls of stored procedures (I want to get rid of direct SQL calls).

Answer 1

There won't be any generic package in java for running any stored procedure.
This is because a SQLServer stored procedure can return any series of result
sets and/or update counts, so the processing of the procedure has to be
specific to what it does. I could write a stored procedure that returns
a result set, 3 result sets, or none, depending on the time of day...
That being said, here is the ideal Java form for executing a procedure in
JDBC, and the loop for processing everything any procedure could return:
boolean getResultSetNow = ps.execute();
int updateCount = -1;
while (true) { // handle all in-line results from any procedure
if (getResultSetNow) {
ResultSet r = ps.getResultSet();
while (r.next()) {
// fully process result set before calling getMoreResults() again!
r.close();
} else {
updateCount = ps.getUpdateCount();
if (updateCount != -1) { // it's a valid update count
if (you want) System.out.println("Processing an update count of " + updateCount);
if ((!getResultSetNow) && (updateCount == -1)) break; // only when both are true are we done with the loop
getResultSetNow = ps.getMoreResults();
// if ps is a CallableStatement and there are output parameters,
// get them now after the loop.