Display Image from buffer Image

Question

Hi,
I have bufferdImage I want to display the bufferedImage in my jsp page. Displaing the images is a part of the page. Is it possible to pass the bufferedImage data to servlet and using the servlet Can I display the image by just calling the Servlet from jsp.

Answer 1

Get2win4world wrote:
Hi,
I have bufferdImage I want to display the bufferedImage in my jsp page. Displaing the images is a part of the page. Is it possible to pass the bufferedImage data to servlet and using the servlet Can I display the image by just calling the Servlet from jsp.Apparently, that is the appropriate process of doing it.
You need to think of encoding respective image format and you can stream the output through a servlet and use *<img/>* tags to call the servlet URL accordingly.
Please findout the below example where we are using JPEGImage encoding and making an attempt to stream the image.
package com.krim.utility.servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
import java.awt.image.BufferedImage;
public class SimpleImageServlet extends HttpServlet {
        protected void processAction(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
                BufferedOutputStream out = null;           
                BufferedImage myImage = null;               
                ByteArrayOutputStream bos = null;
                byte imageBuffer[] = null;
                JPEGImageEncoder jpg = null;
               try{
                 myImage = (BufferedImage)request.getAttribute("bufferedImage"); 
                 bos = new ByteArrayOutputStream();
                 jpg = JPEGCodec.createJPEGEncoder(bos);
                 jpg.encode(image);
                 imageBuffer = bos.toByteArray();
                 out = new BufferedOutputStream(response.getOutputStream(),imageBuffer.length);
                 response.setContentType("image/jpeg");
                 response.setContentLength(bos.size());
                 out.write(imageBuffer);
                 out.flush();
           }catch(Exception exp){
                throw ServletExeption(exp.getMessage());
           } finally{
                if(out != null)
                 try(out.close();)catch(Exception e){}
               if(bos != null)
                 try(bos.close();)catch(Exception e){}
               jpg = null;
               imageBuffer = null;
        protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
             processAction(request,response);
        protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
             processAction(request,response);
}Usage in jsp can be like the below where we have a action that could be called with a unique ID which can fetch appropraite BufferedImage.
<img src="<%=request.getContextPath()%>/image?id=XXXXYYYZZZ"/>In the same way you can think of implementing similar thing for formats like PNG,GIF & etc...According to your requirement and need of the situation.
Hope that helps :)
REGARDS,
RaHuL