download multiple files types

I am using jsp servlet to upload and download 开发者_JAVA百科files.

I want to download many types of files, so I choose to download them as zip files in order not to fall in defining each type of attachment in the response, when I make upload all of files uploaded correctly, when I make download for txt and docx files they are downloaded correctly too, but when I download pdf or image files, they are not downloaded correctly, since I put them in the same folder!

when I make download for txt and docx files they are downloaded correctly too, but when I download pdf or image files, they are not downloaded correctly

Fact: .txt and .docx (XML!) files are text based while PDF and images are binary based.

So, it sounds much like that you read/write files using Reader/Writer instead of InputStream/OutputStream.

Fix the code accordingly. Never use Reader/Writer as long as you're not interested in the actual file content on a character basis. It will totally corrupt binary files. You can find a basic example of a download servlet here.