Convert .txt file to .xls in java

Question

I'm using mallet to do some topic modeling experiment and now I got the keys.txt and doc.txt which I can open using microsoft excel but when I used POI api to read the content it just didn't work and give me the result as invalid header.

I tried to open the files in excel and save them the second time in xls format and this time it worked. So I guess though I specified in mallet command that it should be saved as xls it didn't work.

Is there any way that I can convert a txt to xls format in java? Or I can use java to open call microsoft excel to open the .txt file and save them again?

Thanks.

Answer 1

Maybe mallet is generated CSV (comma separated value) or TSV (tab separated value) files. You could try a library like opencsv to read the file, create an XLS file from the data using POI. If my assumption is true, you may find more help in this thread .