Broken encoding in Excel report from Java -

in application user able download excel report. when user downloads xls using ff encoding fine , umlauts shown correct. if user same in ie , chrome umlauts in xls broken.

excel report generated in servlet using apache poi v3.10.1 , filled same data every time. xls files downloaded in ff , ie (or chrome) different.

any idea why?

btw, tried set encoding in response header

response.setheader("content-type", "application/vnd.ms-excel; charset=utf-8");

but no success.

upd 03.04. piece of code servlet:

outputstream out = response.getoutputstream(); ... response.setcontenttype("application/vnd.ms-excel"); response.setheader("content-disposition", "attachment; filename=\"" + filename + ".xls" + "\""); ... workbook.write(out);

ie somehow cannot understand response.setheader("content-type", "application/vnd.ms-excel; charset=utf-8");. try instead response.setcontenttype("application/vnd.ms-excel");. works on ie8 , ff35.