Question

Example of xelem to Export Excel from HTML

Asked by: ofonck

I have been trying to send back the excel to the Web Browser, in the next code, but dont know the correct method to display the generated workbook, write and out can be used with strings but it dont seem to work with excel files, anyone have an idea how to make this work?

java.util.ArrayList colours = new java.util.ArrayList();
            java.util.ArrayList values = new java.util.ArrayList();
            java.util.ArrayList names = new java.util.ArrayList();
            
            java.util.ArrayList l = dbLink.getLookupGroupComplaints(
                    tbl, fkey,
                    "order by name asc", "and complaintdate between " + startDate + " and " + endDate + " order by id asc"
                    );
            
            java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat( "d MMM yyyy" );
            String heading = sdf.format( new java.util.Date( startDate ) ) + " to " +
                    sdf.format( new java.util.Date( endDate ) );
            Workbook wb = new XLWorkbook(heading);
 
            Worksheet sheet = wb.addSheet(heading);
            sheet.addCell(listName + " BY " + heading, "title");
 
            // up to row 11 we want a white background
            for (int i = 1; i < 11; i++) {
            sheet.getRowAt(i).setStyleID("bg_white");
            }
 
            CellPointer cp = sheet.getCellPointer();
            cp.moveTo(10, 1);
            Address adrF1 = cp.getAddress();
            sheet.addCell(listName, "table_heading");
 
            Address adrF2 = cp.getAddress();
            sheet.addCell("Number of Complaints", "table_heading");
 
            for( int i = 0; i < l.size(); i++ ) {
                cp.moveCRLF();
                ccd.beans.GroupList gl = (ccd.beans.GroupList) l.get( i );
                sheet.addCell(gl.getName());
                sheet.addCell(gl.getList().size());
            }
            //listName = dbLink.getLookupTableName( tbl, lookupId );
               
            
            response.setContentType( "application/vnd.ms-excel" );
            response.setHeader( "Content-Disposition",
                    "attachment; filename=\""+listName + "." + heading + ".xls\"" );
 
           These next are my desesperated ways to be creative, but can't find a way yet, some help at this point please.
            OutputStream fWb = null;
 
            FileInputStream fis = null;
 
            new XSerializer().serialize(wb,fWb);
 
            response.getOutputStream().(fWb);
                                  
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Asked On
2009-08-08 at 03:04:00ID24636797
Tags

HTML export to Excel

Topics

Java Server Pages (JSP)

,

Microsoft Excel Spreadsheet Software

,

Java Programming Language

,

Web Languages/Standards

Participating Experts
4
Points
500
Comments
18

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Answers

 

by: ericpetePosted on 2009-08-16 at 19:00:30ID: 25111280

I'm not sure I understand your question.

Do you have an Excel workbook you want to convert to a set of web pages? Or do you have some web pages you want to convert to an Excel spreadsheet?

Do you want people to be able to modify them? And what do you want to do with the resulting files when you're done with them?

 

by: ofonckPosted on 2009-08-19 at 01:34:30ID: 25130557

Hi ericpete, ok this is what i trying to do is create a workbook in excel from data in a database, the same data is presented in html using the same data, i create reports in html thats work fine, then when i made this code to generate a excel version of the same data as a option in the same html report (export to excel option) i use this code to generate the workbook, this code works in a not web java application, but how send out stream of this excel objet by a web browser?

 

by: ericpetePosted on 2009-08-19 at 11:19:49ID: 25135658

ofonck,

Hopefully, we can get an Excel expert in here to help us -- I can use Excel, but I'm not at all versed in its capabilities.

If I understand it correctly:

You have a database, and you're trying to use Java to create an Excel spreadsheet. Is that correct?

If it is, then I would approach it from a different direction. Can you export the data from the database as (for example) a CSV file, and then import THAT into the workbook? You should be able to create a macro that does that, thereby skipping the whole Java problem entirely...

ep

 

by: ofonckPosted on 2009-08-19 at 14:42:15ID: 25137674

actually i need to export to excel from the Java code because is an option in the HTML reports to export to excel the current report with graphics and everything, xelem do all this but in a system application, and trying to get this working in a web application using java servlets.

 

by: ericpetePosted on 2009-08-19 at 19:45:32ID: 25139059

Hmmm... that's a little out of my league; I know nothing about Java. But let me see if I can track down some help for you.

ep

 

by: TimYatesPosted on 2009-08-19 at 22:51:19ID: 25139619

can't you do the following?

Never used xelem though, I always tend to print out tab seperated files, or try to use HSSF

Tim

            new XSerializer().serialize( wb, response.getOutputStream() ) ;

                                              
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by: CEHJPosted on 2009-08-20 at 01:04:06ID: 25140131

Try

            response.setContentType( "application/vnd.ms-excel" );
            response.setHeader( "Content-Disposition",
                    "attachment; filename=\""+listName + "." + heading + ".xls\"" );
 
 
            OutputStream out = response.getOutputStream();
 
            
 
            new XSerializer().serialize(wb, out);
 
            out.flush();

                                              
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by: TimYatesPosted on 2009-08-20 at 01:07:19ID: 25140152

Yeah, so what I said but with a flush

 

by: CEHJPosted on 2009-08-20 at 01:12:29ID: 25140173

Yes, sorry Tim - i somehow didn't see your code eg

 

by: TimYatesPosted on 2009-08-20 at 01:20:58ID: 25140216

:-)  No worries :-)

Long time no see!

 

by: WarCrimesPosted on 2009-08-20 at 06:51:09ID: 25142491

Ok, so I've only used Java as part of an in-house app.  I have a couple of questions though, hopefully they will lead somewhere, but if not, at least I tried to help the discussion.

1)
            java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat( "d MMM yyyy" );
            String heading = sdf.format( new java.util.Date( startDate ) ) + " to " +


I doubt it makes a difference, but perhaps coming from the web, it doesn't like spaces in the filename.  I know when working from UNIX this is a no-no as you can't reference the file if the filename has spaces.

2)
            response.setHeader( "Content-Disposition",
                    "attachment; filename=\""+listName + "." + heading + ".xls\"" );
 
I know this is a total newb question, but why do you have listName here as part of the filename?  I thought above you declared the new wb as just

Workbook wb = new XLWorkbook(heading);

Sometimes asking questions leads to answers, so just trying to stir the pot I suppose.

Regards,
WC

 

by: WarCrimesPosted on 2009-08-20 at 12:06:29ID: 25145962

ser.Points is a collection of data points contained in that series.  You can reference a specific one by using it's index

ser.Points(lngCol)

as in the code where it appear like that.

 

by: WarCrimesPosted on 2009-08-20 at 12:06:54ID: 25145964

Sorry, somehow got in the wrong window

 

by: ofonckPosted on 2009-08-21 at 10:22:53ID: 31613224

Thanks for the Support, i didn't know was so easy, but now i can complete that code

20120131-EE-VQP-002

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