Storing an array into the database using jdbc

Hi,
i�ve got a problem storing an array into a database. I want to store objects consisting of several attributes. One of these attributes is an array containing several int values. I don�t know exactly what is the best way to store these objects into a database. I have created two tables connected by a one to many relationship of which one stores the array values and the other table stores the object containing the array. Is that ok or should I use another way. It�s the first time I�m trying to store objects containing arrays into a database so I�m very uncertain in which way this should be done.
Thanks in advance for any tips

1. You should use blob or longvarbianry type colum to stor that array.
2. All object in that array should be Serializable.
3. Constuct a PreparedStatement object
4. Convert array to byte[] object
ByteArrayOutputStream baos=null;
ObjectOutputStream objectOutputStream=null;
baos = new ByteArrayOutputStream(bufferSize);
objectOutputStream = new ObjectOutputStream(baos);
objectOutputStream.writeObject(array);
objectOutputStream.flush();
baos.flush();
byte[] value=baos.toByteArray();
5. Now you can use PreparedStatement.setBytes function to insert byte[] value.

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Inserting Multiple Images into oracle database using JDBC

I wanted to insert multiple images into database using JDBC by reading it from the file... and i am passing photos.txt(my text file) as an input parameter... I have inserted all the values into the database except for the image part... this is my content of photos.txt file and i have copied all the images into the folder
*" C:\\photos "*
*1,in1.jpg,108,19,in-n-out*
*2,in2.jpg,187,21,in-n-out*
*3,in3.jpg,308,41,in-n-out*
*4,in4.jpg,477,52,in-n-out*
*5,in5.jpg,530,50,in-n-out*
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CREATE TABLE PHOTO(
ID NUMBER NOT NULL PRIMARY KEY ,
Name BLOB,
X DOUBLE PRECISION,
Y DOUBLE PRECISION,
Tags VARCHAR2(40)
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As i am able to enter one image file by above code in1.jpg in to the oracle database.... but i am not able to insert all the image file in to the database.....do tell me what should i do.... and can you give me the example on the basis of the above code of mine...
do reply as soon as possible..

jwenting wrote:
that depends. Putting the images in BLOBs prevents the file locations stored in the database from getting out of synch with the filesystem when sysadmins decide to reorganise directory structures or "archive" "old" files that noone uses anyway.True, but it really comes down to a business decision (cost-benefit analysis). If you have the bucks, the expertise, and the time, go with the Blobs, otherwise go with the flat files.

How to import an .csv file into the database?

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JSPs are good for displaying information on the front-end, and for displaying HTML forms, there are other technologies more suitable for the middle layer, back end and the database layer.
So break you application into
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2) Middle layer - Servlets and JavaBeans to interact with JSPs. The code that reads the CSV file to parse it's contents should be a Java Class in the middle layer. It makes use of Java File I/O
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Keeping the above concepts in mind, first build a simple JSP and get it to work,
then research on Google , for Java File I/O , discover how to read a file,
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So I logged in as myself. I have DBA privileges in the database. The call to the database package hung for me as well. No error ... just a hung cursor.
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Mapping is part of an ESB service
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ESB accomplish ESB duties such as transformation, translation, routing. Routing use a protocol accepted by the consumer. In a JDBC consumer it is JDBC protocol and hence it a JDBC adaptor.
There is clear separation on responsibilities among business system and ESB. ESB do not participate in business decision or try to get into business system data layer.
So who ever are asking people to check duplicate check as part of mapping (an ESB service) may not understand integration practice.
Please use an adaptor module which will execute the duplicate check with business system in a plug and play approach and separate that from ESB service so that people can build integration using AGILE approach.
Thanks

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NCHAR issue with oracle database using JDBC adapter

Hi,
We have a requirement to develop an XI interface from FTP server(File adapter) to oracle database using JDBC adapter. In the oracle database table few fields are of type NCHAR/NVARCHAR. when we try to insert the character(A,B,c..) values into oracle table fields of type NCHAR/NVARCHAR, we are getting the following error message in the JDBC adapter audit log. IF we pass the numeric value to the same field, then we are able to insert the records successfully.
Unable to execute statement for table or stored procedure. 'IPCSDD_DOWNLOAD_PROCESS' (Structure 'StatementName1') due to java.sql.SQLException: ORA-00904: "P": invalid identifier
2010-10-19 22:29:59 Error JDBC message processing failed; reason Error processing request in sax parser: Error when executing statement for table/stored proc. 'IPCSDD_DOWNLOAD_PROCESS' (structure 'StatementName1'): java.sql.SQLException: ORA-00904: "P": invalid identifier
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Please find the system information below.
Oracle version- 10.2.4
XI version - 3.0/ service pack 19
JDBC driver- oracle.jdbc.driver.OracleDriver
Please suggest.
Thanks,
Venkata
Edited by: Venkata Narayana Eepuri on Oct 21, 2010 12:10 AM

Dear Venkata Narayana,
Concerning the error, kindly go through the following note :
731 - Collective note: ORA-00904
follow the recommendations mentioned in that and please check if that helps.
Best Regards
Nishwanth

Capture Web Cam image in APEX and Upload into the Database

Overview
By using a flash object, you should be able to interface with a usb web cam connected to the client machine. Their are a couple of open source ones that I know about, but the one I chose to go with is by Taboca Labs and is called CamCanvas. This is released under the MIT license, and it is at version 0.2, so not very mature - but in saying that it seems to do the trick. The next part is to upload a snapshot into the database - in this particular implementation, it is achieved by taking a snapshot, and putting that data into the canvas object. This is a new HTML5 element, so I am not certain what the IE support would be like. Once you have the image into the canvas, you can then use the provided function convertToDataURL() to convert the image into a Base64 encoded string, which you can then use to convert into to a BLOB. There is however one problem with the Base64 string - APEX has a limitation of 32k for and item value, so can't be submitted by normal means, and a workaround (AJAX) has to be implemented.
Part 1. Capturing the Image from the Flash Object into the Canvas element
Set up the Page
Required Files
Download the tarball of the webcam library from: https://github.com/taboca/CamCanvas-API-/tarball/master
Upload the necessary components to your application. (The flash swf file can be got from one of the samples in the Samples folder. In the root of the tarball, there is actually a swf file, but this seems to be a different file than of what is in the samples - so I just stick with the one from the samples)
Page Body
Create a HTML region, and add the following:
    <div class="container">
     <object id="iembedflash" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="320" height="240">
          <param name="movie" value="#APP_IMAGES#camcanvas.swf" />
          <param name="quality" value="high" />
          <param name="allowScriptAccess" value="always" />
          <embed allowScriptAccess="always" id="embedflash" src="#APP_IMAGES#camcanvas.swf" quality="high" width="320" height="240"
type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" mayscript="true" />
    </object>
    </div>
<p><a href="javascript:captureToCanvas()">Capture</a></p>
<canvas style="border:1px solid yellow" id="canvas" width="320" height="240"></canvas>That will create the webcam container, and an empty canvas element for the captured image to go into.
Also, have a hidden unprotected page item to store the Base64 code into - I called mine P2_IMAGE_BASE64
HTML Header and Body Attribute
Add the Page HTML Body Attribute as:
onload="init(320,240)"
JavaScript
Add the following in the Function and Global Variable Declarations for the page (mostly taken out of the samples provided)
//Camera relations functions
var gCtx = null;
var gCanvas = null;
var imageData = null;
var ii=0;
var jj=0;
var c=0;
function init(ww,hh){
     gCanvas = document.getElementById("canvas");
     var w = ww;
     var h = hh;
     gCanvas.style.width = w + "px";
     gCanvas.style.height = h + "px";
     gCanvas.width = w;
     gCanvas.height = h;
     gCtx = gCanvas.getContext("2d");
     gCtx.clearRect(0, 0, w, h);
     imageData = gCtx.getImageData( 0,0,320,240);
function passLine(stringPixels) {
     //a = (intVal >> 24) & 0xff;
     var coll = stringPixels.split("-");
     for(var i=0;i<320;i++) {
          var intVal = parseInt(coll);
          r = (intVal >> 16) & 0xff;
          g = (intVal >> 8) & 0xff;
          b = (intVal ) & 0xff;
          imageData.data[c+0]=r;
          imageData.data[c+1]=g;
          imageData.data[c+2]=b;
          imageData.data[c+3]=255;
          c+=4;
     if(c>=320*240*4) {
          c=0;
          gCtx.putImageData(imageData, 0,0);
function captureToCanvas() {
     flash = document.getElementById("embedflash");
     flash.ccCapture();
     var canvEle = document.getElementById('canvas');
     $s('P2_IMAGE_BASE64', canvEle.toDataURL());//Assumes hidden item name is P2_IMAGE_BASE64
     clob_Submit();//this is a part of part (AJAX submit value to a collection) two
}In the footer region of the page (which is just a loading image to show whilst the data is being submitted to the collection [hidden by default]) :<img src="#IMAGE_PREFIX#processing3.gif" id="AjaxLoading"
style="display:none;position:absolute;left:45%;top:45%;padding:10px;border:2px solid black;background:#FFF;" />If you give it a quick test, you should be able to see the webcam feed and capture it into the canvas element by clicking the capture link, in between the two elements - it might through a JS error since the clob_Submit() function does not exist yet.
*Part 2. Upload the image into the Database*
As mentioned in the overview, the main limitation is that APEX can't submit values larger than 32k, which I hope the APEX development team will be fixing this limitation in a future release, the workaround isn't really good from a maintainability perspective.
In the sample applications, there is one that demonstrates saving values to the database that are over 32k, which uses an AJAX technique: see http://www.oracle.com/technetwork/developer-tools/apex/application-express/packaged-apps-090453.html#LARGE.
*Required Files*
From the sample application, there is a script you need to upload, and reference in your page. So you can either install the sample application I linked to, or grab the script from the demonstration I have provided - its called apex_save_large.js.
*Create a New Page*
Create a page to Post the large value to (I created mine as 1000), and create the following process, with the condition that Request = SAVE. (All this is in the sample application for saving large values).declare
     l_code clob := empty_clob;
begin
     dbms_lob.createtemporary( l_code, false, dbms_lob.SESSION );
     for i in 1..wwv_flow.g_f01.count loop
          dbms_lob.writeappend(l_code,length(wwv_flow.g_f01(i)),wwv_flow.g_f01(i));
     end loop;
     apex_collection.create_or_truncate_collection(p_collection_name => wc_pkg_globals.g_base64_collection);
     apex_collection.add_member(p_collection_name => wc_pkg_globals.g_base64_collection,p_clob001 => l_code);
     htmldb_application.g_unrecoverable_error := TRUE;
end;I also created a package for storing the collection name, which is referred to in the process, for the collection name:create or replace
package
wc_pkg_globals
as
g_base64_collection constant varchar2(40) := 'BASE64_IMAGE';
end wc_pkg_globals;That is all that needs to be done for page 1000. You don't use this for anything else, *so go back to edit the camera page*.
*Modify the Function and Global Variable Declarations* (to be able to submit large values.)
The below again assumes the item that you want to submit has an item name of 'P2_IMAGE_BASE64', the condition of the process on the POST page is request = SAVE, and the post page is page 1000. This has been taken srtaight from the sample application for saving large values.//32K Limit workaround functions
function clob_Submit(){
          $x_Show('AjaxLoading')
          $a_PostClob('P2_IMAGE_BASE64','SAVE','1000',clob_SubmitReturn);
function clob_SubmitReturn(){
          if(p.readyState == 4){
                         $x_Hide('AjaxLoading');
                         $x('P2_IMAGE_BASE64').value = '';
          }else{return false;}
function doSubmit(r){
$x('P2_IMAGE_BASE64').value = ''
     flowSelectAll();
     document.wwv_flow.p_request.value = r;
     document.wwv_flow.submit();
}Also, reference the script that the above code makes use of, in the page header<script type="text/javascript" src="#WORKSPACE_IMAGES#apex_save_large.js"></script>Assuming the script is located in workspace images, and not associated to a specific app. Other wise reference #APP_IMAGES#
*Set up the table to store the images*CREATE TABLE "WC_SNAPSHOT"
"WC_SNAPSHOT_ID" NUMBER NOT NULL ENABLE,
"BINARY" BLOB,
CONSTRAINT "WC_SNAPSHOT_PK" PRIMARY KEY ("WC_SNAPSHOT_ID")
create sequence seq_wc_snapshot start with 1 increment by 1;
CREATE OR REPLACE TRIGGER "BI_WC_SNAPSHOT" BEFORE
INSERT ON WC_SNAPSHOT FOR EACH ROW BEGIN
SELECT seq_wc_snapshot.nextval INTO :NEW.wc_snapshot_id FROM dual;
END;
Then finally, create a page process to save the image:declare
v_image_input CLOB;
v_image_output BLOB;
v_buffer NUMBER := 64;
v_start_index NUMBER := 1;
v_raw_temp raw(64);
begin
--discard the bit of the string we dont need
select substr(clob001, instr(clob001, ',')+1, length(clob001)) into v_image_input
from apex_collections
where collection_name = wc_pkg_globals.g_base64_collection;
dbms_lob.createtemporary(v_image_output, true);
for i in 1..ceil(dbms_lob.getlength(v_image_input)/v_buffer) loop
v_raw_temp := utl_encode.base64_decode(utl_raw.cast_to_raw(dbms_lob.substr(v_image_input, v_buffer, v_start_index)));
dbms_lob.writeappend(v_image_output, utl_raw.length(v_raw_temp),v_raw_temp);
v_start_index := v_start_index + v_buffer;
end loop;
insert into WC_SNAPSHOT (binary) values (v_image_output); commit;
end;Create a save button - add some sort of validation to make sure the hidden item has a value (i.e. image has been captured). Make the above conditional for request = button name so it only runs when you click Save (you probably want to disable this button until the data has been completely submitted to the collection - I haven't done this in the demonstration).
Voila, you should have now be able to capture the image from a webcam. Take a look at the samples from the CamCanvas API for extra effects if you wanted to do something special.
And of course, all the above assumed you want a resolution of 320 x 240 for the image.
Disclaimer: At time of writing, this worked with a logitech something or rather webcam, and is completely untested on IE.
Check out a demo: http://apex.oracle.com/pls/apex/f?p=trents_demos:webcam_i (my image is a bit blocky, but i think its just my webcam. I've seen others that are much more crisp using this) Also, just be sure to wait for the progress bar to dissappear before clicking Save.
Feedback welcomed.

Hmm, maybe for some reason you aren't getting the base64 version of the saved image? Is the collection getting the full base64 string? Seems like its not getting any if its no data found.
The javascript console is your friend.
Also, in the example i used an extra page, from what one of the examples on apex packages apps had. But since then, I found this post by Carl: http://carlback.blogspot.com/2008/04/new-stuff-4-over-head-with-clob.html - I would use this technique for submitting the clob, over what I have done - as its less hacky. Just sayin.

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<%@ page import="java.util.*, java.io.*, java.sql.*" %>
<%
String insert;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String sourceURL = new String("jdbc:odbc:ASA");
Connection con = null;
con = DriverManager.getConnection(sourceURL,"","");
java.sql.Statement statement = con.createStatement();
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Syntax of insert was wrong..
while ( request.getParameter("pnumber+itemname+price") !=null)
insert = "insert into Cart VALUES( ' "+pnumber+" ' ," + " '"+itemname+ " ' ,"+ " ' "+price+ " ' )"; //getting the error here :cannot resolve symbols
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try this........
Column1, Column2, Column3 are the field names of your table Cart....
..changed it to your original fieldnames...
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Alex,
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https://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=vbgeneral%2Cvblanguage&filter=alltypes&sort=lastpostdesc
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Blog:
Podcast:
Twitter:
LinkedIn:

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register.html:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Register</TITLE>
</HEAD>
<BODY BGCOLOR="#FDF5E6">
<CENTER><IMG SRC="dvdti.jpg" ALIGN=middle >   </CENTER>
<HR>
<H1 ALIGN="CENTER">Please enter your registration details:</H1>
<FORM ACTION="http://localhost:8080/examples/servlet/Assignment1.register">
<BR>First Name: <input type="text" NAME="Ufirst_name"><BR>
<BR>Last Name: <input TYPE="TEXT" NAME="Ulast_name"><BR>
<BR>Address: <INPUT TYPE="text" name="Uaddress"><BR>
<BR>E-mail:     <INPUT TYPE="TEXT" NAME="Uemail"><BR
<BR>Password: <INPUT TYPE="password" NAME="Upassword"><BR>
<CENTER>
    <INPUT TYPE="SUBMIT" VALUE="Register">
</CENTER>
</FORM>
</BODY>
</HTML>
register.java:
package Assignment1;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
// Connects to a database to retrieve music data
public class register extends HttpServlet {
public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
// Database connection code starts here
     Connection conn = null;
     // loading jdbc driver for mysql (help in mysql.jar file in classpath)
     try{
         Class.forName("com.mysql.jdbc.Driver").newInstance();
     } catch(Exception e) {
         System.out.println(e);
     // connecting to database
     try{
          // connection string for demos database, username demos, password demo-pass
         conn = DriverManager.getConnection
        ("jdbc:mysql://mudfoot.doc.stu.mmu.ac.uk:3306/roddiea?user=roddiea&password=");
          System.out.println("Connection to database successful.");
       catch(SQLException se) {
         System.out.println(se);
// Create select statement and execute it
try        { Statement stmt2 = conn.createStatement();
          // Get the regdetails from the reg form
           String Ufirst_name = request.getParameter("Ufirst_name");
           String Ulast_name = request.getParameter("Ulast_name");
           String Uaddress = request.getParameter("Uaddress");
           String Uemail = request.getParameter("Uemail");
              String Upassword = request.getParameter("Upassword");
          stmt2.executeUpdate("INSERT INTO customer(first_name, last_name, address, email, password)" + "VALUES('Ufirst_name', 'Ulast_name', 'Uaddress', 'Uemail', 'Upassword')");
          System.out.println (stmt2);
          out.println(stmt2);
          out.println(Ufirst_name + Ulast_name + Uaddress + Uemail + Upassword);
    // close the html
    out.println("</BODY></HTML>");
          stmt2.close();
         conn.close();
     }catch(SQLException se) {
         System.out.println(se);
}Message was edited by:
Altered_Carbon
Message was edited by:
Altered_Carbon
I also realise that this is a more MYSQL titled problem, but those forums look rubbish <_<

Investigate PreparedStatement.
Currently you're trying to insert a value "Ufirst_name" instead of the value of the variable called Ufirst_name.
It's possible to do this (you could do something like this: "... '" + UfirstName + "' ...") but DEFINITELLY NOT RECOMMENDED. Instead use a prepared statement.
D.

Insert multiple rows of records into the database

The codes below allow me to insert a row of record into the database. How would I changed these to insert multiple rows at once? Please help!
String sql = "INSERT INTO EMPLOYEES" +
"(First_Name, Last_Name, Title, Phone) " +
" VALUES " +
PreparedStatement statement = conn.prepareStatement(sql);
statement.setObject (1, First_Name);
statement.setObject (2, Last_Name);
statement.setObject (3, Title);
statement.setObject (4, Phone);
boolean returnValue = statement.execute();

Hi mystiqueX,
As wmolosho has suggested in his answer to this very same question that you also posted to the JavaServer Pages forum, you can create a batch of inserts and perform them using the "executeBatch()" method. I will use Craig's sample code to demonstrate:
(Note that this code is untested!)
conn.setAutoCommit(false);
PreparedStatement statement = conn.prepareStatement(sql);
// assume you have an array of objects here
for (int i = 0; i < data.length; i++) {
statement.setString(1, data<i>.getFirstName());
statement.setString(2, data<i>.getLastName());
statement.setString(3, data<i>.getTitle());
statement.setString(4, data<i>.getPhone());
statement.addBatch();
statement.executeBatch();
conn.commit();If you are not familiar with it, allow me to suggest looking at the Making Batch Updates lesson on the Java Tutorial.
Hope it helps.
Good Luck,
Avi.

Storing an array into the database using jdbc

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