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I like to access an image from the web/images directory. I like to access this image in the spring controller, so I can convert this image to byte[]. I am creating a chart and this image is part of the chart display. So, I am using this byte[] to construct Graphic2d object. Closest I have got to it is using this: 

FileSystemResource resource = new FileSystemResource("images/"+imageName);

Currently, I have stored this image in the package structure. I like to do better than this. I like to read directly from web/images directory. Please give me some advice, Thanks.

A23149577
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Harry
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2 Answers2

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The more elegant way is let your controller implement ServletContextAware so as your controller can injecte ServletContext instance, then you should use:

InputStream  stream = servletContext.getResourceAsStream("/images/image.jpg");
int bytesRead;
byte[] buffer = new byte[8192];
while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
        //process image data, i.e. write to sompe place,etc.
}
//close the stream
stream.close();

BTW, as for servletContext.getRealPath, different servlet container might have different implementation, and it might not work after project packaged to a war file. so, it's recommended to use getResourceAsStream.

Laurence Geng
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Well you can use servlet context to get the path to web/images. Use following code:

File file=new File(request.getSession().getServletContext().getRealPath("images/file.jpg"));

Note: Here I am utilizing request i.e. HttpServletRequest.

Darshan Lila
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