chinese zip file have encoding problem while downloading

Hello Java Scholors

i have write one programe to download the contents,when i download this file through the jsp page and give the english file name.its downloaded properly and working fine also.but when i give the file name as chinese then also downloading is correct and its working fine.but the chinese file name has encoding problem.or u can say chinese file name is got corrupt.

will any body help me to resolve this issues