shreyavanga opened a new issue, #850: URL: https://github.com/apache/poi/issues/850
Hi all, I'm working on a project where I use a template .xlsx file, update it with data, and save it as a new file using Java and Apache POI. The implementation works correctly, and the generated Excel file opens fine. However, when I check the file type using the **file --mime-type** command on macOS, it shows the MIME type as application/octet-stream instead of the expected application/vnd.openxmlformats-officedocument.spreadsheetml.sheet. Here are a few things I’ve tried so far: Verified the MIME type of the original template file — it correctly shows application/vnd.openxmlformats-officedocument.spreadsheetml.sheet. When I open the generated file in Excel and simply resave it (without making any changes), the MIME type is then detected correctly as application/vnd.openxmlformats-officedocument.spreadsheetml.sheet. I unzipped the generated file to inspect its internal structure and it appears intact. Tested this across different JDK versions but the issue persists. Is there anything I might be missing in the write process or a way to ensure the correct MIME type is reflected directly after generation? Any insights or suggestions would be appreciated! Thanks, -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org For additional commands, e-mail: dev-h...@poi.apache.org
