BufferedImage 'null' with ImageIO.read(url)

Question

Hi,
I am trying to display a JSP as an image which can be used in another JSP's img tags.
Here is how I coded image.jsp.
I observed that for 'bmp' image type, image object is 'null'. When I directly open 'bmp' image url in browser, it opens correctly.
<%@ page import = "java.io.*" %>
<%@ page import = "java.awt.image.BufferedImage"%>
<%@ page import = "javax.imageio.ImageIO"%>
<%@ page import = "javax.imageio.spi.IIORegistry"%>
<%@ page import = "java.net.URL"%>
<%@ page import = "java.net.URLEncoder"%>
<%
     try{ 
          String imgUrl = URLEncoder.encode(request.getParameter("imgUrl"));
          imgUrl = imgUrl.replaceAll("%3A",":");
          imgUrl = imgUrl.replaceAll("%2F","/");     
          imgUrl = imgUrl.replaceAll("\\+","%20");     
          String[] urlSplit = imgUrl.split("\\.");          
          String imgTyp = urlSplit[urlSplit.length-1];
          URL url = new URL(imgUrl);
          BufferedImage image = null;
          image = ImageIO.read(url);
          ByteArrayOutputStream bas = new ByteArrayOutputStream();
          ImageIO.write(image,imgTyp, bas);
          byte[] imgData = bas.toByteArray();
          response.setContentType("image/"+imgTyp);
          OutputStream o = response.getOutputStream();
          o.write(imgData);
          o.flush();
          o.close();
    catch (Exception e)
       e.printStackTrace();
    finally{
%>Any idea, why is this happening?
With regards,
Amey

Answer 1

Hi EJP,
Thanks for reply.
I now changed my code to this: -
<%@ page import = "java.io.*" %>
<%@ page import = "java.awt.image.BufferedImage"%>
<%@ page import = "javax.imageio.ImageIO"%>
<%@ page import = "javax.imageio.spi.IIORegistry"%>
<%@ page import = "java.net.URL"%>
<%@ page import = "java.net.URLEncoder"%>
<%@ page import = "com.sap.tc.logging.Location"%>
<%
     Location location = Location.getLocation("AmeyTestPar.imageJSP");
     try{
          String imgUrl = request.getParameter("imgUrl");
          location.fatalT("imgUrl = " + imgUrl);
          String[] urlSplit = imgUrl.split("\\.");          
          String imgTyp = urlSplit[urlSplit.length-1];
          URL url = new URL(imgUrl);
          BufferedImage bufferedImage = ImageIO.read(url);
          OutputStream outputStream = response.getOutputStream();
          response.setContentType("image/"+imgTyp);
          ImageIO.write(bufferedImage,imgTyp, outputStream);
          outputStream.flush();
          outputStream.close();
   }catch (Exception e){  
          location.fatalT("Exception in image.jsp : " + e.getMessage());
         e.printStackTrace();
%>But this is running into 'java.lang.IllegalArgumentException: im == null!" at
jvax.imageio.ImageIO.write(ImageIO.java:1413)
and
jvax.imageio.ImageIO.write(ImageIO.java:1508)
Also, I heard about use of image type plugins in package 'javax.imageio.plugins'.
I added 'jai_imageio-1.1.jar' in build path and inserted 'ImageIO.scanForPlugins()' line in code.
But this didn't help either.
With regards,
Amey