How to retrive multiple images from database

Question

Hi,
I have to retrieve multiple images from oracle database and have to display the image in the jsp.
I am passing imageCategoryId from the jsp.This id contain number of image in DB.
I googled the issue and i found some solution.want to know whether what i did is correct and how i have to display the retrieved image in jsp.
Need urgent help.Experts kindly help me.
This is my action file.
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.NamingException;
import com.image.dao.ImageDAO;
public class GetImageServlet extends HttpServlet{
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException{
try{
     ImageDAO image = new ImageDAO();
String categoryId = request.getParameter("catgId");
     bytes[] imagebyte = image.getImagesByCategoryId(categoryId);
InputStream is = new FileInputStream(imagebyte);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bos.write(imagebyte);
blobIs.close();
catch(IOException e){
e.printStackTrace();
} catch(Exception excep) {
                    excep.printStackTrace();
This is DAO file
public byte[] getImagesByCategoryId(String categoryId) throws Exception
          PreparedStatement statement = null;
          ResultSet resultSet = null;
          StringBuffer queryBuffer = new StringBuffer();
          Blob image = null;
          String imageId = null;
          ArrayList imageIdLIst = new ArrayList();
          try {
               this.connection = connManager.getDataSourceConnection();
               queryBuffer.append("select image from Image_Table where image_category='"+categoryId+"'");
               statement = connection.prepareStatement(queryBuffer.toString());
               resultSet = statement.executeQuery();
               while(resultSet.next()) {
                    image = rs.getBlob(1);
                    long imgLength = image.getBufferSize();
                    byte[] byteImage = new byte[imgLength];
                    byteImage = image.getBytes(1,(int)imgLength);
          } catch(Exception excep) {
               excep.printStackTrace();
          return byteImage;
How to display retrieved image in jsp.
whether action and dao file is correct or what changes i have to do to correct the problem.
P.S : As a Newbie i dont know how to use code tag for this java code.Kindly forgive me.
Regards,
hardlyUsed.

Answer 1

hardlyused wrote:
I have to retrieve multiple images from oracle database and have to display the image in the jsp.There are at least two parts to the problem.
1. Get it from the database.
2. Display it.
Part 1 has nothing to do with part 2.
You must solve 1 before you solve 2.
Finally generically there is no such thing an "image" but rather there is binary data which is represented in such a way that it one of many formats that represent an "image".
Knowing which specific format the "image" is stored in will at a minimum be helpful and could be required.