I am looking for a web-based application, must be a JSP/Servlet
solution, which can be deployed to an Intranet environment for 2-way
data exchange between Oracle databases and Excel. By 2-way data
exchange I mean user would be able to login to the application, browse
the databases entities and download selected data into Excel
spreadsheet. User would then be able to make changes in Excel and
upload the data back into the database to update the data. Both
download and upload need to be performed through web browser.

The application also needs to provide a web-base administrative
console that allows admin user to:

1. Specify the databases, tables and columns that will be exposed to
the end users for download and/or upload
2. Create user accounts and assign security roles to the user
accounts. The security roles determine whether a user has the download
and/or upload privileges to certain databases, tables and columns.
3. Customize SQL statements used for querying the data when generating Excel file.
4. Customize generated Excel file format, including column titles and
cell color, locking cells.

The application can be deployed on Tomcat, WebLogic or Websphere
running on Linux or Windows XP Server.