I have a file uploader module. The UI is created using simple HTML and Javascript. Server side I am using Java code. I want to check the type of the uploaded file.
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see also http://stackoverflow.com/questions/51438/getting-a-files-mime-type-in-java – Mark Elliot Jun 21 '10 at 04:09
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In server side or client side?? – rahul Jun 21 '10 at 04:10
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@Rahul:I want to check the file type in Server side. – Puru Jun 21 '10 at 04:13
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Files don't really have types. The best you can do would be to attempt to load the file as an XLS.
- If the load succeeds, the file is most likely an XLS.
- If the load fails, the file is either an invalid/malformed XLS, or not an XLS at all.
You can also look at the uploaded file name or the content type, but neither of these is definitive; i.e. they might say that the file is an XLS when it is something completely different.
Stephen C
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