• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

How tochange the values in an existing Excel file by using POI?

 
Ranch Hand
Posts: 287
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I'm pretty new to use POI. I can read values from Excel file by reading it. But during the read, it seems I cannot change Excel cell values.



The above code won't really change the value to "TEST" for that cell after the program is finished.

If using FileOutStream with an output file name, I think it's just gonna overwrite the existing file, or create a new file.

How can I change the values in an existing file? Thanks.
 
Rancher
Posts: 43081
77
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
How are you saving the file after changing the value?
 
reubin haz
Ranch Hand
Posts: 287
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
How to save it?

Thanks.
 
Ulf Dittmer
Rancher
Posts: 43081
77
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

How to save it?


Does that mean you don't have any code to save the file? If so, that's what the HSSFWorkbook.write(OutputStream) method does.
 
reubin haz
Ranch Hand
Posts: 287
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I worked it out. I thought HSSFWorkbook.write(fileOut); where there is nothing involved with fileOut would produce an empty Excel file. But it's not.

Thanks.
 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic