Show saved file (pdf/text/html/xml/image) content on page from database (BLOB) in ADF Application

Hello All

Previously I have posted about uploading and saving files in database blob column now this post is about showing saved file content on page using ADF Faces inline frame component

In this post I am extending same previous application, Now see how we can implement this
There are few more steps to go , See the additional steps to show file content on page-

Show uploaded file (pdf/text/html/xml/image) content on page -Oracle ADF

Hello all
In previous post
Uploading and downloading files from absolute server path in Oracle ADF (12.1.3)
we saw that how can we upload any file to absolute server path and download same from there.
Uploading part is done using simple java code to write file to specified folder and downloading part is done using <af:fileDownloadActionListener>

Now in this post i am going to show that how can we display a file on page directly without downloading it.
So for this i am using same sample application that i have used in previous post , you can download it from here



See the additional steps to show file content on page-

• Create a servlet to parse file into output stream , this output stream will be used to show file content further.
  To create servlet right click on viewController project select New--->From Gallery-->Web Tier-->Servlet











• See servlet source code to parse file into outputStream



import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;

import javax.servlet.*;
import javax.servlet.http.*;

public class PreviewFileServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=UTF-8";

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    /**
     * @param request
     * @param response
     * @throws ServletException
     * @throws IOException
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String path = (request.getParameter("path"));

        OutputStream os = response.getOutputStream();
        //If path is null
        if (path.equalsIgnoreCase("No")) {
            path = "D:\\Document\\ItemImage\\Item.jpg";
        }
        if (request.getParameter("path") == "") {
            path = "D:\\Document\\ItemImage\\Item.jpg";
        }
        InputStream inputStream = null;

        try {
            File outputFile = new File(path);
            inputStream = new FileInputStream(outputFile);
            BufferedInputStream in = new BufferedInputStream(inputStream);
            int b;
            byte[] buffer = new byte[10240];
            while ((b = in.read(buffer, 0, 10240)) != -1) {
                os.write(buffer, 0, b);
            }

        } catch (Exception e) {

            System.out.println(e);
        } finally {
            if (os != null) {
                os.close();
            }
            if (inputStream != null) {
                inputStream.close();
            }

        }
    }
}



• Now open page in editor and drop an af:inlineFrame from component palette . inlineFrame is used to create a frame to show any external page or document just like as HTML iframe , it is loaded from source attribute
  So here i am using servlet as source attribute for this inlineFrame



<af:inlineFrame id="if2"
                                                    source="/previewfileservlet?path=#{bindings.Path.inputValue == null ? 'No' : bindings.Path.inputValue}"
                                                    inlineStyle="height:350px;width:800px;" sizing="preferred"/>


here path of document is added to pageDef bindings that is passed to servelt as parameter


• Now run this application and check it
  
  View Text File-

          View PDF File-

Thanks, Happy Learning :)

Post Related to file handling in Oracle ADF- 

Show saved file (pdf/text/html/xml/image) content on page from database (BLOB) in ADF Application
Uploading and showing image file from absolute server path -Orace ADF
Exporting viewObject data in text file using af:fileDownloadActionListener in Oracle ADF (12.1.3)
Creating pdf file using Apache PDFBox API in ADF Faces and opening it in new window -Oracle ADF
Download file from url using Oracle ADF & Java- Download Manager
Reading html source of a webpage (url) using Oracle ADF (af:richTextEditor) & Java

Add Custom Flash Chat in Oracle ADF Application

In this tutorial i am going to show that how can you add a custom flash chat in your ADF application, and use it to chat with friends.
this is very much simple, as no code required to do this.

• Go to http://www.everywherechat.com/ , this site provides free custom flash chat rooms, get html code of your custom chat from here
• Create an html page using that code






<html>
<body>
<!-- Begin Everywherechat Room Code -->
    
      <br />
     <script src="http://www.everywherechat.com/e.php?defaultRoom=Lobby&roomList=true&fontSize=12&width=600&height=500&theme=night"></script> 

<!-- End Everywherechat Room Code --> 
</body>
</html>



• Now create a Fusion Web Application and create a page in it, call this HTML page in an inlineFrame (af:inlineFrame)



<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
  <af:panelGroupLayout id="pgl1">
    <af:inlineFrame id="if1" source="/chat.html" inlineStyle="height:700px;width:700px;"/>
  </af:panelGroupLayout>
</jsp:root>



• Now Run your application and see your flash chat room is ready - Happy Coding
   
  
  
  Download Sample Application-Sample ADF Application