asked on

Problem creating servlet as a subclass!

I just created a java class that creates an excel document.
It has a function called saveToFile which saves the excel document to a file.

Now I also want to be able to "download" the document just created, I know I could create another class (a servlet) setting the content type to "application/vnd.ms-excel" and then download the file... But! I would like to do this in a single file (not create another file for the servlet), so I thought about creating a servlet subclass. But then I don't know how I can call the subclass from the other class. Any idea how I can achieve my goal (either by servlet subclass or anything else....) ??

Am I explaining my problem well enough?

thanks

shinobun

Subclassing will also introduce a new class. Why not just create a new Servlet class? I think that would be more maintainable.

nediam1234

ASKER

thanks for a quick reply,

When I save my excel sheet to a file I use something like:

ExcelSheet sheet = new ExcelSheet();
sheet.someFunctionToCreateTheDocument();
sheet.someAnotherFunctionToCreateMoreOfTheDocument();

Then, I can call
sheet.saveToFile("myFilename.xls");
to save the file.

It would be nice to be able to call something like this in the jsp page:
response.sendRedirect(sheet.downloadServlet);
to "download" the document. Without having to pass the whole document as a parameter to another servlet (the variable "sheet" in the above sample already has the whole excel document in an variable).

are you saying that I should call something like this? :
ExcelSheet sheet = new ExcelSheet();
sheet.someFunctionToCreateTheDocument();
sheet.someAnotherFunctionToCreateMoreOfTheDocument();

location.href= 'newServletFromANewFile?theData=<%=sheet.getTheWholeDocumentAsString()%>';

then my question is... isn't it a problem calling a servlet if the excel sheet is be big?

ASKER CERTIFIED SOLUTION

shinobun

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial