Display image Blob of jsf page without using servlet

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• How to retrieve the image BLOB from database and display the image in rtf file using the Oracle XML Desktop 5.6.2 publication server?

  Hi all

  Here I have the image BLOB in the database files,

  I want to show the image to PDF using file to rtf using Oracle Xml Desktop Publisher,

  Hi all

  I found the solution for reading Image BLOB of data base & display in Pdf format.

  (1) read the image from DB.2) and then copy the picture using IO. UtilsCopy method to copy the picture

  (3) then encode with base64 converter then you will get the tag XML with Base64 as string then placed in your XML Code & preview the output, you will find the image

  Photo = (BlobDomain) currentRow.getAttribute ("Image");

  ByteArrayOutputStream OutputStream = new ByteArrayOutputStream();

  	Byte [] imageByte;
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• Servlet not showing do not image BLOB Oracle in JSF

  Hi forum.
  
  I have a table in oracle in which i m storage photos in a BLOB on the field and extension (mime type) of the file in a field of varchar2. I can store image successfully. but I want the stored image to display in a graphicimage BLOB tag. I searched the net and found it must be done using servlet. the code I used is as follows. but I get a null pointer exception. I know I should get these exceptions but I don't know how to deal with since there is little vague rest in each site, I searched. so I opted to ask the forum.
  
  Here is the code for my jsp page
  

                                       .
                                       .
                                       .
       <h:graphicImage value="/DisplayImage"/> 
                                      .
                                      .
   

  Web.XML is amended as follows
  

                <servlet>
    <servlet-name>DisplayImage</servlet-name>
    <servlet-class>imageDisplay.DisplayImage</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>DisplayImage</servlet-name>
    <url-pattern>/DisplayImage</url-pattern>
  </servlet-mapping>
            

  the servlet itself...

     package imageDisplay;
  
  import java.sql.*;
  import java.io.*;
  import javax.servlet.*;
  import javax.servlet.http.*;
  import org.pa.utils.HibernateUtils;
  import org.hibernate.Session;
  public class DisplayImage extends  HttpServlet{
    
    public void doGet(HttpServletRequest request,HttpServletResponse response)  throws ServletException, IOException 
    {
   
              Session hibernateSession = null;
            hibernateSession = HibernateUtils.currentSession();
            Connection connection;
            connection = hibernateSession.connection();
            
            Statement st1;
    try{  
          Class.forName("oracle.jdbc.driver.OracleDriver");
           st1=connection.createStatement();
           ResultSet rs1 = st1.executeQuery("select APP_FILE from EMPLOYEE_DETAILS where EMP_ID = 2");  //APP_FILE IS THE BLOB FIELD
           System.out.println("----------------#@$#@$$%^$%^%&^*^&*(&(*&^%$#$%@#%^%^%&*&^*$^&#%^$%@#$%@#$--------------------");
         String imgLen="";
         
         while(rs1.next())
                   {
         imgLen = rs1.getString(1);
      
    
                    int len = imgLen.length();   //THIS IS LINE 35 WHERE ERROR IS EMERGED...............
                   byte [] rb = new byte[len];
                   InputStream readImg = rs1.getBinaryStream(1);
                   int index= readImg.read(rb, 0, len);  
    
              System.out.println("index----#@$#@$$%^$%^%&^*^&*(&(*&^%$#$%@#%^%^%&*&^*$^&#%^$%@#$%@#$------------"+index);
              response.reset();
              response.setContentType("image/jpg");
              response.getOutputStream().write(rb,0,len);
              response.getOutputStream().flush();
         }
    
    st1.close();
    response.getOutputStream().close();
   } catch (Exception e){
    e.printStackTrace();
    }
    }
  }     
  
  
    

  the error I get is
  

   index----#@$#@$$%^$%^%&^*^&*(&(*&^%$#$%@#%^%^%&*&^*$^&#%^$%@#$%@#$------------
  java.lang.NullPointerException
       at imageDisplay.DisplayImage.doGet(DisplayImage.java:35)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
       at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
       at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
       at java.lang.Thread.run(Unknown Source)

  Bundle of thanks in advance for reading my problem waterproofed and your help I'm looking desperately for
  
  Published by: jaykio77 on January 11, 2012 04:09
  
  Published by: jaykio77 on January 11, 2012 04:12

  Instead of copying and pasting code, take the time to read on the works of JDBC. Yes it will take a long time, but when you acquire the knowledge you prevent you having to dump your problems on other people, in this case a lot of foreign friends.

  Copy the following code:

  imgLen = rs1.getString(1);
  
                    int len = imgLen.length();   //THIS IS LINE 35 WHERE ERROR IS EMERGED...............
                   byte [] rb = new byte[len];
                   InputStream readImg = rs1.getBinaryStream(1);
  

  Does really not much sense. This assumes that the first position in the result set is a string and a BLOB.

  Meanwhile, break your problem. What you want to do is to read a blob of a result set. Right? That's it, who cares that a servlet is involved, which is not what you are having problems with. You can not read the blob.

  It is essential to realize that you can refine your google search for «blob of resultset» java Guess what appeared to be the first time for me:

  http://www.java2s.com/code/Java/database-SQL-JDBC/GetBLOBdatafromresultset.htm

• Display an image BLOB in a browser

  OK, I have a table that stores the JPEGs as BLOB Oracle. What I want to do is to read one of these BLOB and display it on a web page. Seems simple.
  
  The problem is that I can not all first convert the BLOB to a file with UTL_FILE. The image will not be considered as the whole of the content of the page either, it must be in line with any other text content. Our system has a back end of PL/SQL that generates all the HTML code. The Oracle 10 g, pl/sql database is 10.2.0.4.0. The only other technology that can be used is javascript on the client side.
  
  Is it still possible? I have been stood up by this problem for some time and would appreciate any help I can get.
  
  Thank you

  Our system has a back end of PL/SQL that generates all the HTML code.

  East - the APEX or based HTMLDB? If so, you can use a procedure such as

  CREATE OR REPLACE procedure download_my_file(p_file in number) as
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      v_length  number;
      v_file_name varchar2(2000);
      Lob_loc  BLOB;
  BEGIN
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          into v_mime,lob_loc,v_file_name,v_length
          from file_subjects
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                  htp.p('Content-Disposition: attachment; filename="' || v_file_name || '"');
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                  owa_util.http_header_close;
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          wpg_docload.download_file( Lob_loc );
  end download_my_file;