get the extension of the uploaded file in jsp using apache common fileupload

Question

Initially i started with storing the images in database for security and easy backup purpose.

so i never faced the problems to get the extension of the file.

Now i am facing problem because database load.

So i planned that i will store the images in a folder and i will show those images.

but i need to rename those file and store the extension in database so that i can directly access.

But as i was string the images in database, i never cared about the extension of the file.

As i have to access the image file, i must know the extension.

How to get the extension of the file in Apache common fileupload.

Answer 1

Here is how I have done it in my code. item is a FileItem or a FileItemStream object.

String format = "none";
String fileName = item.getName();
int index = fileName.lastIndexOf(".");
if(index > 0){
               format = fileName.substring(index+1);
               format = format.toLowerCase();
}