I need to determine if an image exists in a JSP tag so I can display a default if it doesn’t exist. What is the best way to access the War root so that I can check to see if the image exists? Or is there a better solution?
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I need to determine if an image exists in a JSP tag so I can display a default if it doesn’t exist. What is the best way to access the War root so that I can check to see if the image exists? Or is there a better solution?
The
ServletContextmethod getResource can be used for features like this. If the resource (the image) doesn’t exist, this method returnsnull. In that case, a default image can be displayed.Note that the URL this method returns is not the URL to use as the ‘src’ attribute in an
<img>tag. It is most likely afile:orjar:protocol URL that wouldn’t make sense on another host. In this application, its only tested to see if it isnull, and not actually by the JSP.