Question

I want to display the image located in my local drive. I am using sun java app server 8. For example If I generate a file abc.jpg dynamically and store it in c:\abc.jpg, then how could I use it in jsp or servlets? How to display it in the jsp or servlet pages?
I know giving the path c:\abc.jpg in coding to display image wont work , because it is out of webserver..

Answer 1

Basically just create a Servlet which gets an InputStream of it with help of FileInputStream and writes it to the OutputStream of the HttpServletResponse along with a correct set of response headers with at least the content-type. Finally call this servlet in the src attribute of the <img> element along with the file identifier as request parameter or pathinfo. E.g.:

File file = new File("c:/abc.jpg");

response.setContentType(getServletContext().getMimeType(file.getName()));
response.setHeader("Content-Length", String.valueOf(file.length()));
response.setHeader("Content-Disposition", "inline; filename=\"" + file.getName() + "\"");

BufferedInputStream input = null;
BufferedOutputStream output = null;

try {
    input = new BufferedInputStream(new FileInputStream(file));
    output = new BufferedOutputStream(response.getOutputStream());

    byte[] buffer = new byte[10240];
    int length;
    while ((length = input.read(buffer)) > 0) {
        output.write(buffer, 0, length);
    }
} finally {
    if (output != null) try { output.close(); } catch (IOException logOrIgnore) {}
    if (input != null) try { input.close(); } catch (IOException logOrIgnore) {}
}

You can find here a complete basic example: http://balusc.blogspot.com/2007/04/imageservlet.html