IMG tag does not bring image

Question

I have a web application, where i am storing all the images in a folder which is totally outside WEB-INF folder or webroot folder. When the jsp to display the image is called, before displaying it, i am moving the concerned image files to WEB-INF/images folder and then setting the path in the html IMG tag. My question is

Is this good design? Also even though the image is moved to WEB-INF/images folder, the page does not display the image always, it displays sometimes and sometimes it doesnt. I dont know how to debug this problem.

I am using springs and spring security.