How to download a zip file in Java
In our previous article, we showed how to download a file of any type from a servlet.
Now for zip files, things are a bit different, in this tutorial, we specifically show how to write a zip file to an HTTP response and download it to the browser.
1- Download a Zip file
In order to download a zip file in Java, we need to firstly set the content type of the HTTP response as “application/zip” and then write the zip file to the ServletOutputStream.
The following piece of code can be used whenever we need to download a zip file in Java:
1 2 3 4 5 6 7 8 | byte[] zip = // your zip file is defined here response.setContentType("application/zip"); response.setHeader("Content-Disposition", "attachment; filename=output.zip"); ServletOutputStream sos = response.getOutputStream(); sos.write(zip); sos.flush(); |
![Java – Convert File to byte[]](https://i0.wp.com/www.programmergate.com/wp-content/uploads/2018/07/file-byteArray.png?resize=520%2C245&ssl=1)
![Java – Convert byte[] to File](https://i1.wp.com/www.programmergate.com/wp-content/uploads/2018/07/byteArray-File.png?resize=520%2C245&ssl=1)
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