iText – HTML to PDF - Image is not displayed in PDF

html-to-pdf, itext, java, relative-path

Solution

I think you can do it easily using a Servlet for viewing the image. How to write a servlet for this is here

Here a sample dispatcher for you. Just edit the required places as needed

@Controller
public class ImageController extends DispatcherServlet {



    private static final int DEFAULT_BUFFER_SIZE = 10240; // 10KB.

    // Properties ---------------------------------------------------------------------------------

    private String imagePath;

   @RequestMapping(value="images/{imageId:.+}", method = RequestMethod.GET)
   public @ResponseBody void getImage(@PathVariable String imageId,HttpServletRequest request, HttpServletResponse response){
        String requestedImage = request.getPathInfo();
         this.imagePath ="image path in server here";

         if (requestedImage == null) {
             // Do your thing if the image is not supplied to the request URI.
             // Throw an exception, or send 404, or show default/warning image, or just ignore it.
             try {
                response.sendError(HttpServletResponse.SC_NOT_FOUND);
             }catch(IOException ioException){
                logger.error("error image path incorrect:{}", ioException);

            } // 404.
             return;
         }

         File image=null;
        try {
            image = new File(imagePath, URLDecoder.decode(imageId, "UTF-8"));
        } catch (UnsupportedEncodingException unsupportedEncodingException) {
            logger.error("error image can not decode:{}", unsupportedEncodingException);

        }

         // Check if file actually exists in filesystem.
         if (!image.exists()) {
             // Do your thing if the file appears to be non-existing.
             // Throw an exception, or send 404, or show default/warning image, or just ignore it.
             try {
                response.sendError(HttpServletResponse.SC_NOT_FOUND);
             }catch(IOException ioException){
                logger.error("error image does not exists:{}", ioException);

            } // 404.
             return;
         }

         // Get content type by filename.
         String contentType = "jpeg";
         contentType="image/"+contentType;

         // Init servlet response.
         response.reset();
         response.setBufferSize(DEFAULT_BUFFER_SIZE);
         response.setContentType(contentType);
         response.setHeader("Content-Length", String.valueOf(image.length()));
         response.setHeader("Content-Disposition", "inline; filename=\"" + image.getName() + "\"");

         // Prepare streams.
         BufferedInputStream input = null;
         BufferedOutputStream output = null;

         try {
             // Open streams.
             try {
                input = new BufferedInputStream(new FileInputStream(image), DEFAULT_BUFFER_SIZE);
            } catch (FileNotFoundException e) {

                logger.error("error creating file input stream to the image file :{}", e);


            }
             try {

                 output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);

            } catch (IOException e) {


                logger.error("error creating output stream to the http response :{}", e);

            }

             // Write file contents to response.
             byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
             int length;
             try {
                while ((length = input.read(buffer)) > 0) {
                     output.write(buffer, 0, length);
                 }
            } catch (IOException e) {

                logger.error("error writing the image file to outputstream :{}", e);

            }
         } finally {
             // Gently close streams.
             close(output);
             close(input);
         }
     }

     // Helpers (can be refactored to public utility class) ----------------------------------------




private  void close(Closeable resource) {
    if (resource != null) {
        try {
            resource.close();
        } catch (IOException e) {
            // Do your thing with the exception. Print it, log it or mail it.
            logger.error("error closing resources:{}", e);
        }
    }
}




}

Problem

Original source