Retrieve BLOB image in J-developer 10

Hello,
Well I were surfing the web about this question. Actually I need to retrieve a images that are stored in BLOB's from a database, for example, in database I have a customer, which have 5 images attached in BLOBs,
I found some info, which tells, how to retrieve images using storefront_techpreview3 servlet, but I am not good at understanding the code. As I am beginer in JAVA.
So maybe someone knows a nice tutorial about how to retrieve a display images from database BLOB's in JSP, or maybe some hint's?
Thanks in advance

Well I tried to change some things, but it still don't work.
Here are contents of 3 files
index.html (located under root directory j-developer under UserInterface)
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1257"></meta>
<title>index</title>
</head>
<body>
test
<img src='showImage' alt="bilde">
</body>
</html>
web.xml (located in WEB-INF)
<?xml version = '1.0' encoding = 'windows-1257'?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee">
<description>Empty web.xml file for Web Application</description>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>showImage</servlet-name>
<servlet-class>foto.showImage</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>showImage</servlet-name>
<url-pattern>/showimage</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>35</session-timeout>
</session-config>
<mime-mapping>
<extension>html</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>txt</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
</web-app>
showImage.java (located under Application Sources, package foto)
package foto;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
public class showImage extends HttpServlet {
private Connection con;
private Statement stmt;
private String trace;
* Setup database connection and create SQL statement
public void init( ServletConfig config ) throws ServletException
// Try database connection
try{
// The call to Class.forName explicitly loads the driver class
//Class.forName("org.gjt.mm.mysql.Driver");
//Class.forName("com.orcl.jdbc.Driver").newInstance();
Class.forName("oracle.jdbc.driver.OracleConnection").newInstance();
// Class.forName("com.mysql.jdbc.Driver").newInstance();
//jdbc:mysql://<HOST>:<PORT>/<DB>
//Connection con = DriverManager.getConnection("jdbc:mysql://localhost/mydb?user=''&password=''");
// Connection con;
//con = DriverManager.getConnection("jdbc:oracle://localhost:1521/orcl?user='system'&password='admin'");
con = DriverManager.getConnection("jdbc:oracle:thin:@hp:1521:orcl", "system", "parole");
// Once a connection has been established we can create an instance
// of Statement, through which we will send queries to the database.
stmt = con.createStatement();
catch (Exception exception ) {
exception.printStackTrace();
throw new UnavailableException(exception.getMessage());
} // End init()
* Forward to doGet
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
doPost(request, response);
* NOTE: doPost -> HTTP post requests | doGet -> HTTP get resuest
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
// Simple trace variable for debugging...
trace = "";
SELECT *
FROM image
WHERE image.image_id = ?variable?
try {
String SQL =
"SELECT * " +
"FROM foto " +
"WHERE foto.id = 2";
ResultSet rs = stmt.executeQuery(SQL);
rs.next();
Blob blob = null;
blob = rs.getBlob("foto_blob");
response.setContentType("image/jpeg");
System.out.println("just above OutputStream");
InputStream in = blob.getBinaryStream();
OutputStream out = response.getOutputStream();
int b;
while ((b = in.read()) != -1) {
out.write(b);
in.close();
out.flush();
out.close();
catch (Exception exception ) {
throw new ServletException("Error");
} // end doPost()
* Close SQL statements & database connection
public void destroy()
// Attempt to close statements and database connection
try{
stmt.close();
con.close();
// Handle database exceptions by returning error to client
catch (SQLException sqlException){
sqlException.printStackTrace();
} // End destroy()
} // End class showImage
When I try to run a index.html page I just get an alt atribute content of image tag and when I press link: I get error msg:
404 Not Found
Resource /fotokoki-UserInterface-context-root/showImage not found on this server
Maybe someone notice some mistake? Thank you and forgive me if the question are silly.

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=====
type Exception report
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====

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>
http://download.oracle.com/docs/cd/E18464_01/doc.30/e17472/dialogs.htm
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>
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>
http://download.oracle.com/docs/cd/E18464_01/doc.30/e17472/intro.htm#CHDDJFGE
>
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I followed the instructions on this page: http://groups.google.com/group/mozilla.support.firefox/msg/73bab3fb55ac5b42
However, when I right clicked the URL and chose "Save Link As..." it only saved a 1.7KB file that none of my photo editing programs can recognize or open. I've tried going to cache entries for other image links and saving them and when I choose Save Link As for those they save just fine, and in full size, so I'm not sure why this one won't work...I'm using Offline Mode so I'm not sure why the picture no longer being hosted online should make a difference one way or the other. I'm just hoping that my act of refreshing the page and nothing being there didn't overwrite the cache file and thus erase the cache'd image.
So is there any hope of retrieving this picture or is it gone for good?

Hi.
Once the image in question is replace with another one, the old one is erased. That is to say, if you open an image, say www.domain.com/image.png, and it's a 200x200 image, then you close it, it's still on cache, and you can access it through the cache. But if the image is changed in the server, that same exact url, and you access it again, at you see a 250x200 image (just an example), then the 200x200 is gone forever.
Your hope is that you never accessed the same URL again, so the old cache wasn't erased. If you know the url of the image, simply select offline mode (File > Work Offline, I think) and access its url. It will load the cached version and not check for the online one. Only if there is a cached version, of course.
I hope this helps.

Display BLOB (image) column in (interactive) report

Hi,
I have a field called "picture" in my table "details" which is of type BLOB. i also have a field for "MIMETYPE" and "filename"
i additionally have a "name" and "description" columns which i need to display along with the picture as columns in a report (preferably interactive).
i have also modified the BLOB display format as per
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/apex/r31/apex31nf/apex31blob.htm
what i am missing is the correct query. if possible, i would like to control the size of the picture rendered within the report like say 40*50.
I have also referred to the thread
APEX 3.1 Display BLOB Image
But i don't know how to place the
dbms_lob.getlength("BLOB_CONTENT") as "BLOB_CONTENT"
in my query.
The above also makes the report column as of type "number". is this expected?
Any help would be much appreciated.
Regards,
Ramakrishnan

You haven't actually said what the problem is?
>
I have a field called "picture" in my table "details" which is of type BLOB. i also have a field for "MIMETYPE" and "filename"
i additionally have a "name" and "description" columns which i need to display along with the picture as columns in a report (preferably interactive).
i have also modified the BLOB display format as per
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/apex/r31/apex31nf/apex31blob.htm
what i am missing is the correct query.
I have also referred to the thread
APEX 3.1 Display BLOB Image
But i don't know how to place the
dbms_lob.getlength("BLOB_CONTENT") as "BLOB_CONTENT"
>
Something like:
select
          name
        , description
        , dbms_lob.getlength(picture) picture
from
          details
if possible, i would like to control the size of the picture rendered within the report like say 40*50.For images close to this size it's easy to do this for declarative BLOB images in interactive reports using CSS. Add a style sheet with:
.apexir_WORKSHEET_DATA td[headers="PICTURE"] img {
display: block;
width: 40px;
border: 1px solid #999;
padding: 4px;
background: #f6f6f6;
}where the <tt>PICTURE</tt> value in the attribute selector is the table header ID of the image column. Setting only one dimension (in this case the width) scales the image with the correct aspect ratio. (The border, padding and background properties are just eye candy...)
However, scaling large images in the browser this way is a huge waste of bandwidth and produces poorer quality images than creating proper scaled down versions using image tools. For improved performance and image quality, and where you require image-specific scaling you can use the database ORDImage object to produce thumbnail and preview versions automatically, as described in this blog post.

Inserting blob images in a database

Hi there can anyone tell me how to insert a blob image into a table; can you actually give me an example
thanks

use DBMS_LOB.LOADFROMFILE.
PROCEDURE LOADFROMFILE
Argument Name                  Type                    In/Out Default?
DEST_LOB                       BLOB                    IN/OUT
SRC_LOB                        BINARY FILE LOB         IN
AMOUNT                         NUMBER(38)              IN
DEST_OFFSET                    NUMBER(38)              IN     DEFAULT
SRC_OFFSET                     NUMBER(38)              IN     DEFAULT

How to display a blob image in RTF template's Header.

Hi,
I want to display a blob image (logo company) in my RTF template,
my problem is how i can display this image in the template's Header.
I tried this
<?
<fo:instream-foreign-object content-type="image/jpeg" >
<xsl:value-of select=".//LOGO"/>
</fo:instream-foreign-object>
?>
but was unsuccessful
Thanks in advance.

I tried this
<?
<fo:instream-foreign-object content-type="image/jpeg" >
<xsl:value-of select=".//LOGO"/>
</fo:instream-foreign-object>
?>
but was unsuccessful
sure
what is red elements ?
you template can be looks like
..... some data .....
( after all data )
<?template:footer_logo?>
<fo:instream-foreign-object content-type="image/jpeg" ><xsl:value-of select=".//LOGO"/></fo:instream-foreign-object> (as field )
<?end template?>
<?call-template:footer_logo?> ( in header/footer )
some remarks https://oralublog.wordpress.com/2014/10/04/bi-publisher-11g-footers-and-headers-in-rtf-template/

Retrieve BLOB image in J-developer 10

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