How do you reference image files in jsp which becomes a portlet ?

My portlet is a servlet managing jsp pages. In each of the jsp s, there are image files (*.gif) being referenced. I have placed the image files in .../public_html/WEB-INF/images/ in explorer. In my jsp, I am referencing the image file as
src="WEB-INF/images/help.gif"
On deploying my portlet, the image is not being picked up by the portal. Also, on moving the image and modifying the reference to it, I am still getting the same problem.
Can anyone advise, for my portlet to display the image correctly,
1) where should I place the image files ?
2) how should the jsp code reference it ?
Cheers,
Tara

Hi,
The behaviour you are reporting is an expected behaviour. If you want to include images in your JSP, you need to specify the complete absolute URL to the image on the midtier as only then can the portal invoke that image.
Actually, when you specified the relative URL
WEB-INF/images/help.gif, Oracle9iASPortal actually looks for the image help.gif in the directory structure WEB-INF/lib at its end. As no such file exists, the images are not rendered onto Oracle9iASPortal page.
So you got to use the following workaround,
Assuming your provider name is "temp" (deployed using temp.ear) & the image name is "help.gif" which is stored in the htdocs folder inside temp. This image is invoked by help.jsp
You can get the absolute path of this image as follows:
Request URL is : http://<host>:<port>/temp/providers/temp
Request URI is : /temp/providers/temp
So, Base URL = http://<host>:<port>
Servlet Path is : /temp/htdocs/help.jsp
Truncating the Servlet Path to /temp/htdocs & appending this to Base URL should give you
http://<host>:<port>/temp/htdocs
which is the directory that contains your image. add image name to this URL to get the absolute p[i]Long postings are being truncated to ~1 kB at this time.

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How to upload a image file using JSP

hello to all.
i am in the learning stage please help me to upload a image file
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sincerely
Chezhian

You may find the following articles useful for the JSP/Servlet part:
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Here is the Main class
import org.me.lib.MyJNIWindowClass;
public class Main {
public Main() {
public static void main(String[] args) {
MyJNIWindowClass mw = new MyJNIWindowClass();
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And here is the library class
package org.me.lib;
public class MyJNIWindowClass {
public String s;
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Your problem is one of timing. Consider this simple example.
public class Example {
    public String s;
    private String message = "Hello, " + s;
    public String toString() {
        return message;
    public static void main(String[] args) {
        Example ex = new Example();
        ex.s = "world";
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}When this code is executed, the following happens in order:
1. new Example() is executed, causing an object to constructed. In particular:
2. field s is given value null (since no value is explicitly assigned.
3. field message is given value "Hello, null"
4. Back in method main, field s is now given value "world", but that
doesn't change message.
5. Finally, "Hello, null" is output.
The following fixes the above example:
public class Example {
    private String message;
    public Example(String name) {
        message = "Hello, " + name;
    public String toString() {
        return message;
    public static void main(String[] args) {
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}

How can I add image files to a executable jar file ?

Could you tell me how can I add image files to executable jar file ?
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Please don't cross post, and read this
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How to insert an image file in Oracle database

hi
can you please tell me how to insert an image file into oracle database????
suppose there is one image file in c:\pictures\rose.jpg. how to insert that file into database? theoretically i know that will be BFILE type but i dont know how to insert that.
will be waiting for your reply........
thanks & regards,
Priyatosh

Hello,
The easiest way to load a blob is to use SQL loader.
This example comes from the utilities guide:
LOAD DATA
INFILE 'sample.dat'
INTO TABLE person_table
FIELDS TERMINATED BY ','
(name CHAR(20),
1 ext_fname FILLER CHAR(40),
2 "RESUME" LOBFILE(ext_fname) TERMINATED BY EOF)
Datafile (sample.dat)
Johny Quest,jqresume.txt,
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Secondary Datafile (jqresume.txt)
Johny Quest
500 Oracle Parkway
Secondary Datafile (srresume.txt)
Loading LOBs
10-18 Oracle Database Utilities
Speed Racer
400 Oracle Parkway
regards,
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How to insert a image file into oracle database

hi all
can anyone guide me how to insert a image file into oracle database now
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create table imagestore(image blob);
but when inserting i totally lost don't know what to do how to write query to insert image file

Hi I don't have time to explain really, I did have to do this a while ago though so I will post a code snippet. This is using the commons file upload framework.
Firstly you need a multi part form data (if you are using a web page). If you are not using a web page ignore this bit.
out.println("<form name=\"imgFrm\" method=\"post\" enctype=\"multipart/form-data\" action=\"FileUploadServlet?thisPageAction=reloaded\" onSubmit=\"return submitForm();\"><input type=\"FILE\" name=\"imgSource\" size='60' class='smalltext' onKeyPress='return stopUserInput();' onKeyUp='stopUserInput();' onKeyDown='stopUserInput();' onMouseDown='noMouseDown(event);'>");
out.println("   <input type='submit' name='submit' value='Submit' class='smalltext'>");
out.println("</form>"); Import this once you have the jar file:
import org.apache.commons.fileupload.*;Now a method I wrote to upload the file. I am not saying that this is correct, or its the best way to do this. I am just saying it works for me.
private boolean uploadFile(HttpServletRequest request, HttpSession session) throws Exception {
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        byte fileData[] = null;
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        String imageType = "";
        String error = "";
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                fileData = fileItem.get();
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     } And now finally the method to actually write the file to the database:
private int writeImageFile(byte[] fileData, String fileName, String imageType, String mode, Integer signatureIDIn, HttpServletRequest request) throws Exception {
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        int signatureID = 0;
        PreparedStatement pstmt = null;
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            udbq.setUsePreparedStatements(true);
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How to add an image file to Oracle db?

Need help urgently....Anybody knows how to add an image file (example: jpg)into one of the fields in Oracle database??

This will do the job..
package forum;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.sql.*;
import oracle.jdbc.driver.*;
//import oracle.sql.*;
Wanneer een request.getInputStream wordt geconferteerd naar een "String" (zie later) dan ziet de output in tekstformaat er als volgt uit:
-----------------------------7d280152604f4 Content-Disposition: form-data; name="oploadfile"; filename="C:\WINNT\Profiles\mvo\Desktop\boodschap.txt" Content-Type: text/plain Deze boodschap dient te worden ge-insert in de database. -----------------------------7d280152604f4 Content-Disposition: form-data; name="StadID" 1234 -----------------------------7d280152604f4 Content-Disposition: form-data; name="SuccessPage" /forum/error.jsp -----------------------------7d280152604f4--
of opgesplitst
contentType........... multipart/form-data; boundary=---------------------------7d235ade00f0
filename.............. "C:\Documents and Settings\Administrator\Desktop\boodschap.txt"
MIME type............. text/plain
Wat in database moet.. Dit is de eigenlijke boodschap die moet worden ge-insert in de database.
Eind boundary......... -----------------------------7d235ade00f0 Content-Disposition: form-data; name="file1"; filename="" Content-Type: application/octet-stream -----------------------------7d235ade00f0--
We gaan achtereenvolgens:
1. Kijken of het van het "multipart/form-data" type is (uploaden) en strippen van eerste boundery.
1.a Geen "multipart/form-data" ? dan... error message
1.b Groter dan MAX_SIZE ?..dan .. error message
2. Filenaam van de te uploaden file uitlezen
3. Mimetype bepalen en bepalen in welke positie van de string het Mimetype ophoudt, cq waar te uploaden file begint
4. Bepalen waar eind boundery begint
5. De eigenlijke file uitlezen
6. Terug converteren naar bytes
public class WriteBlob extends HttpServlet {
public static final int MAX_SIZE = ParameterSettings.imageUpload;
String successMessage = "";
public void init(ServletConfig config) throws ServletException {
super.init(config);
* Process the HTTP Get request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
DataInputStream in = null;
FileOutputStream fileOut= null;
PrintWriter out = response.getWriter();
int kb_size = 0;
boolean pass2 = true;
String message = "";
String responseRedirect = "/forum/uploaden.jsp?message="+" Uploaden geslaagd";
try
//get content type of client request
String contentType = request.getContentType();
// Start stap 1...content type is multipart/form-data
if(contentType != null && contentType.indexOf("multipart/form-data") != -1)
//open input stream
in = new DataInputStream(request.getInputStream());
//get length of content data
int formDataLength = request.getContentLength(); // totale lengte van de inputstream
//initieer een byte array om content data op te slaan
byte dataBytes[] = new byte[formDataLength];
//read file into byte array
int bytesRead = 0;
int totalBytesRead = 0;
int sizeCheck = 0;
while (totalBytesRead < formDataLength)
//kijken of de file niet te groot is
sizeCheck = totalBytesRead + in.available();
if (sizeCheck > MAX_SIZE)
pass2 = false;
message = "Sorry. U kunt slechts bestanden uploaden tot een grootte van 500KB";
responseRedirect = "/forum/uploaden.jsp?message="+message;
bytesRead = in.read(dataBytes, totalBytesRead,formDataLength);
totalBytesRead += bytesRead;
if (pass2==true)
kb_size = (int)(formDataLength/1024);
//create string from byte array for easy manipulation
String file = new String(dataBytes);
/*get boundary value (boundary is a unique string that separates content data)
contentType........... multipart/form-data; boundary=---------------------------7d235ade00f0
int lastIndex = contentType.lastIndexOf("=");
String boundary = contentType.substring(lastIndex+1, contentType.length());
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// filename.............. "C:\Documents and Settings\Administrator\Desktop\boodschap.txt"
String saveFile = file.substring(file.indexOf("filename=\"")+10);
saveFile = saveFile.substring(0,saveFile.indexOf("\n"));
saveFile = saveFile.substring(saveFile.lastIndexOf("\\")+1,saveFile.indexOf("\"")); //naam van de file...boodschap.txt
String saveFileName = saveFile;
// Stap 3..Bepaal MIME Type en de positie van eind mime type in string
voorbeeld: -----------------------------7d23d21220524 Content-Disposition: form-data; name="file0"; filename="C:\WINNT\Profiles\mvo\Desktop\z clob.txt" Content-Type: text/plain
String restant = "";
int pos; //position in upload file
// bijv .. filename="C:\Documents and Settings\Administrator\Desktop\boodschap.txt"
pos = file.indexOf("filename=\"");
//find position of content-disposition line
pos = file.indexOf("\n",pos)+1; // eing file naam + spatie
// onderstaand geeft bijv Content-Type: text/plain
restant = file.substring(pos,file.indexOf("\n",pos)-1);
restant = restant.substring(restant.indexOf(":")+2,restant.length()); // MIME type
String mimeType = restant;
//find position of eind content-type line
pos = file.indexOf("\n",pos)+1;
//find position of blank line
pos = file.indexOf("\n",pos)+1;
int start = pos;
// Stap 4 eind boundary
/*find the location of the next boundary marker (marking the end of the upload file data)*/
int boundaryLocation = file.indexOf(boundary,pos)-4; //waarom -4 ..? ziet er uit als linebreak spatie--boundary=-----------------------------7d21c9ae00f0
// Stap 5 en 6..de eigelijke te uploaden file in nieuwe byte file inserten
byte dataBytes2[] = new byte[boundaryLocation-start]; //declareren
for (int i=0;i<(boundaryLocation-start);i++) // inserten BELANGRIJK !!
dataBytes2=dataBytes[start+i];
String next_id = "0";
Statement statement = null;
Connection conn = null;
boolean pass = true;
ResultSet rs = null;
Statement stmt_empty = null;
oracle.sql.BLOB blb = null;
try
int vendor = DriverUtilities.ORACLE;
String username = ConnectionParams.userName;
String password = ConnectionParams.passWord;
String connStr = DriverUtilities.makeURL(vendor);
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
conn = DriverManager.getConnection(connStr,username, password);
if (conn==null){pass=false;}
} catch (Exception e){out.println("<P>" + "There was an error establishing a connection:");}
if (pass==true)
try
String seq_nextval ="select forum_blob_seq.nextval from dual";
statement = conn.createStatement();
ResultSet rset = statement.executeQuery(seq_nextval);
while (rset.next())
next_id = rset.getString(1);
if (next_id.equals("0"))
message = "Uploaden mislukt !...Er ging wat fout tijdens de interactie met de database";
responseRedirect = "/forum/uploaden.jsp?message="+message;
pass = false;
} catch (Exception e1) { out.println("Error blob1 : "+e1.toString()); };
} // end pass
if (pass==true)
try
Statement stmt2 = conn.createStatement();
String insert_empty_blob = "INSERT INTO test_blob(id "+
",filename "+
",mimetype "+
",kb) "+
"VALUES("+Integer.parseInt(next_id) +
",'"+saveFileName+"'"+
",'"+mimeType+"'"+
","+kb_size+")";
stmt2.executeQuery(insert_empty_blob);
conn.commit();
if (stmt2!= null) {stmt2.close();}else{stmt2.close();pass = false;}
} catch (Exception e2){
message = "Uploaden mislukt !...Er ging wat fout tijdens de interactie met de database";
responseRedirect = "/forum/uploaden.jsp?message="+message;
out.println("<P>" + "2. There was an error inserting mime type:");}
} //end pass
if (pass==true)
try
conn.setAutoCommit(false);
} catch (Exception e3) { pass = false; out.println("Error blob 3: "+e3.toString()); };
} //end pass
if (pass==true)
try
String Query_blob ="Select test_blob FROM test_blob where id="+next_id+" FOR UPDATE";
stmt_empty = conn.createStatement();
rs=stmt_empty.executeQuery(Query_blob);
} catch (Exception e4) {
pass = false;
out.println("Error blob 4: "+e4.toString());
message = "Uploaden mislukt !...Er ging wat fout tijdens de interactie met de database";
responseRedirect = "/forum/uploaden.jsp?message="+message;};
} //end pass
if (pass==true)
try
                         if (rs.next())
                         blb = ((OracleResultSet)rs).getBLOB(1);
                    OutputStream stmBlobStream = blb.getBinaryOutputStream();
                         try {
                              int iSize = blb.getBufferSize();
                         byte[] byBuffer = new byte[iSize];
                         int iLength = -1;
ByteArrayInputStream stmByteIn = new ByteArrayInputStream(dataBytes2);
                              try {
// while ( (iLength = in.read(byBuffer, 0,      iSize)) != -1 )
while ( (iLength = stmByteIn.read(byBuffer, 0,      iSize)) != -1 )
                                   stmBlobStream.write(byBuffer, 0, iLength);
                                   stmBlobStream.flush();
                                   } // end while
} catch (Exception e5) {
pass=false;
out.println("Error blob 5: "+e5.toString());
message = "Uploaden mislukt !...Er ging wat fout tijdens de interactie met de database";
responseRedirect = "/forum/uploaden.jsp?message="+message; }
                              finally { conn.commit();     }
} catch (Exception e6) { out.println("Error blob 6: "+e6.toString()); };
                         } //end if rs.next()
                         else {      throw new SQLException("Could not locate message record in database."); }
} catch (Exception e7) { out.println("Error blob : "+e7.toString()); };
} // end pass
} // end pass2
else //request is not multipart/form-data
message = "Uploaden mislukt !...Gegevens niet verstuurd via multipart/form-data.";
responseRedirect = "/forum/error.jsp?message="+message;
out.println("Request not multipart/form-data.");
catch(Exception e)
try
//print error message to standard out
out.println("Error in doPost: " + e);
//send error message to client
out.println("An unexpected error has occurred.");
out.println("Error description: " + e);
}catch (Exception f) {}
response.sendRedirect(responseRedirect);
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
Regards
Martin

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