File resizeing

Question

Hi I am using apache.common.fileupload and managed to upload multiple images to my server;
Following is my code, I rename my files before I save them.
%>
// String imageid = request.getParameter("imgageID");
     boolean isMultipart = ServletFileUpload.isMultipartContent(request);
     if (!isMultipart) {
     } else {
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        List items = null;
        try {
             items = upload.parseRequest(request);
        } catch (FileUploadException e) {
             System.out.println("Unable to load image" +  e.getMessage());
        Iterator itr = items.iterator();
        while(itr.hasNext()) {
               FileItem item = (FileItem) itr.next();
               if (item.isFormField()) {
                    //String name = item.getFieldName();  //This will get the field names. for eg. if u have a hidden field this line will get the hidden filed name.
                //value = item.getString();
                    //out.println(value);
               } else {
             try {
                  //String itemName = item.getName();
                  File fullFile  = new File(item.getName());
                  fileName = fullFile.getName();
                  out.println("old" + fileName);
                  String id = (String)session.getAttribute("adID");
                  out.println(id);
                  String newName =  id+fileName;
                  out.println("new" + newName);
                  //System.out.println("New Image Name" + newName);
                  //System.out.println(getServletContext().getRealPath("/"));// this will give u the path upto ROOT folder..if u want to put inside ur own forlder u can give the location inside the quotes
                  File tosave = new File(getServletContext().getRealPath("/"),newName);
                  item.write(tosave);
             } catch (Exception e) {
                  System.out.println("Unable to save the image" + e.getMessage());
   %>on the sun site I found this example of image resize which I tried on as a servlet, which seems to working fine. Here's the code below:
try {
          int targetWidth=0;
          int targetHeight=0;
          // Get a path to the image to resize.
          // ImageIcon is a kluge to make sure the image is fully
          // loaded before we proceed.
          Image sourceImage = new ImageIcon(Toolkit.getDefaultToolkit().getImage(req.getPathTranslated())).getImage();
          // Calculate the target width and height
          float scale = Float.parseFloat(req.getParameter("scale"))/100;
          targetWidth = (int)(sourceImage.getWidth(null)*scale);
          targetHeight = (int)(sourceImage.getHeight(null)*scale);
          BufferedImage resizedImage = this.scaleImage(sourceImage,targetWidth,targetHeight);
          // Output the finished image straight to the response as a JPEG!
          res.setContentType("image/jpeg");
          JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder
          (res.getOutputStream());
          encoder.encode(resizedImage);
        }catch(Exception e){
            res.sendError(HttpServletResponse.SC_BAD_REQUEST);
    private BufferedImage scaleImage(Image sourceImage, int width, int height){
        ImageFilter filter = new ReplicateScaleFilter(width,height);
        ImageProducer producer = new FilteredImageSource
        (sourceImage.getSource(),filter);
        Image resizedImage = Toolkit.getDefaultToolkit().createImage(producer);
        return this.toBufferedImage(resizedImage);
    private BufferedImage toBufferedImage(Image image){
        image = new ImageIcon(image).getImage();
        BufferedImage bufferedImage = new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_RGB);
        Graphics g = bufferedImage.createGraphics();
        //g.setColor(Color.white);
        g.fillRect(0,0,image.getWidth(null),image.getHeight(null));
        g.drawImage(image,0,0,null);
        g.dispose();
        return bufferedImage;
    }in my file upload.jsp I m uploading multiple files, I want to check to if the iamges are of a certain size, if they are bigger then my expected size I want intergrate the above method is my code to reisize the image.
I can't for the life of me of intergrate it, I am getting all sorts of exception. Any help would be apperciated.
Thanks in advance.

Answer 1

here are the errors:
An error occurred at line: 27 in the jsp file: /upload.jsp
Generated servlet error:
Type mismatch: cannot convert from ImageIcon to Image
An error occurred at line: 27 in the jsp file: /upload.jsp
Generated servlet error:
The constructor File(String, BufferedImage) is undefined
Here my code:
<%@ page import="java.util.List"%>
<%@ page import="java.util.Iterator"%>
<%@ page import="java.io.File" %>
<%@ page import="java.io.IOException"%>
<%@ page import="java.awt.image.ImageFilter"%>
<%@ page import="java.awt.image.ImageProducer"%>
<%@ page import="java.awt.image.ReplicateScaleFilter"%>
<%@ page import="java.awt.image.FilteredImageSource"%>
<%@ page import="javax.swing.*"%>
<%@ page import="java.awt.image.BufferedImage"%>
<%@ page import="java.awt.Image"%>
<%@ page import="java.awt.Graphics"%>
<%@ page import="java.awt.Toolkit"%>
<%@ page import="com.sun.image.codec.jpeg.JPEGCodec"%>
<%@ page import="com.sun.image.codec.jpeg.JPEGImageEncoder"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
   <center><table border="2">
        <tr><td><h1>Your files  uploaded </h1></td></tr>
   <%
    //setting the target w + h
     int targetWidth=0;
    int targetHeight=0;
     //session values used to rename loaded image.
     String adID = "EM225";
     session.setAttribute("adID", adID);
     String fileName = null;
  // String imageid = request.getParameter("imgageID");
     boolean isMultipart = ServletFileUpload.isMultipartContent(request);
     if (!isMultipart) {
     } else {
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        List items = null;
        try {
             items = upload.parseRequest(request);
        } catch (FileUploadException e) {
             System.out.println("Unable to load image" +  e.getMessage());
        Iterator itr = items.iterator();
        while(itr.hasNext()) {
               FileItem item = (FileItem) itr.next();
               if (item.isFormField()) {
                    //String name = item.getFieldName();  //This will get the field names. for eg. if u have a hidden field this line will get the hidden filed name.
                //value = item.getString();
                    //out.println(value);
               } else {
             try {
                  File fullFile  = new File(item.getName());
                  fileName = fullFile.getName();
                  String id = (String)session.getAttribute("adID");
                  String newName =  id+fileName;
                  //passing renamed loaded image.
                  Image sourceImage = new ImageIcon(Toolkit.getDefaultToolkit().getImage(newName));
                  // Calculate the target width and height
                  float scale = 50/100;
                  targetWidth = (int)(sourceImage.getWidth(null)*scale);
                  targetHeight = (int)(sourceImage.getHeight(null)*scale);
                  BufferedImage resizedImage = this.scaleImage(sourceImage,targetWidth,targetHeight);
                  //JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(res.getOutputStream());
                  //encoder.encode(resizedImage);
                  File tosave = new File(getServletContext().getRealPath("/"),resizedImage);
                  item.write(tosave);
             } catch (Exception e) {
                  System.out.println("Unable to save the image" + e.getMessage());
   %>
   <%!
   private BufferedImage scaleImage(Image sourceImage, int width, int height){
        ImageFilter filter = new ReplicateScaleFilter(width,height);
        ImageProducer producer = new FilteredImageSource
        (sourceImage.getSource(),filter);
        Image resizedImage = Toolkit.getDefaultToolkit().createImage(producer);
        return this.toBufferedImage(resizedImage);
    private BufferedImage toBufferedImage(Image image){
        image = new ImageIcon(image).getImage();
        BufferedImage bufferedImage = new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_RGB);
        Graphics g = bufferedImage.createGraphics();
        //g.setColor(Color.white);
        g.fillRect(0,0,image.getWidth(null),image.getHeight(null));
        g.drawImage(image,0,0,null);
        g.dispose();
        return bufferedImage;
   %>
    </table>
   </center>
    </table>
   </center>