Blob to FormFile conversion

Question

Hi ,
i have inserted an image to database from jsp.
while inserting i have converted FormFile to BLOB datatype in program.
now i want to the process in reverse.
i need Blob to FormFile code.
if any body found this post it to me.
Thanks in advance.

Answer 1

hi,
Try this code :
import java.awt.Image;
import java.awt.Toolkit;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class RetrieveImage {
     public static void main(String[] args) {
          try {
               Connection connection = null;//!!! create you connection here !!!
               Statement stmt = connection.createStatement();
               ResultSet rs = stmt.executeQuery("SELECT col_blob FROM your_table");
               Image myImage = null;
               if (rs.next()) {
                    // Get the BLOB from the result set
                    Blob blob = rs.getBlob("col_blob");
                    // Get the number bytes in the BLOB
                    //long blobLength = blob.length();
                    // Get bytes from the BLOB using a stream
                    InputStream is = blob.getBinaryStream();
                    //Create the image
                    ByteArrayOutputStream output = new ByteArrayOutputStream();
                    int a1 = is.read();
                    while ((a1 = is.read())>0) {
                         output.write((char) a1);
                    myImage = Toolkit.getDefaultToolkit().createImage(output.toByteArray());
                    //Use your image
                    output.close();
                    is.close();
          } catch (IOException e) {
               e.printStackTrace(); // handle appropriately this excaption
          } catch (SQLException e) {
               e.printStackTrace();// handle appropriately this excaption
}hth