How to store and retriew .pdf or .doc using file uploader component

Question

hi,
I want to store a .pdf / .doc file in the database and retiew it. I am using
sun studio enterprise for EJB developing(sun application server as the container) , Oracel as DBMS and sun studio creator for frontend.
kaushalya

Answer 1

public String saveButton_action ()
        // TODO: Process the button click action. Return value is a navigation
        // case name where null will return to the same page.
        tagsDataProvider1.cursorLast ();
        //UploadedFile f = fileUpload1.getUploadedFile ();
        if (fileUpload1.getUploadedFile ()!=null)
            tagsDataProvider1.setValue ("attachment",fileUpload1.getUploadedFile().getBytes ());
            tagsDataProvider1.setValue ("attachmentfilename",fileUpload1.getUploadedFile().getOriginalName ());
            tagsDataProvider1.setValue ("attachmentcontenttype",fileUpload1.getUploadedFile().getContentType ());
        tagsDataProvider1.commitChanges ();
        return "home";
    }This servlet returns the data to the user unadulterated:
* FileView.java
* Created on October 6, 2005, 4:50 PM
* To change this template, choose Tools | Options and locate the template under
* the Source Creation and Management node. Right-click the template and choose
* Open. You can then make changes to the template in the Source Editor.
package docman;
* @author USER
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
public class FileView  extends HttpServlet {
String ct;
String type;
    /** Creates a new instance of DisplayPicture */
    public FileView() {
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    public void destroy() {
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        String id=request.getParameter("id");
        type=request.getParameter("type");
        //String ct=request.getParameter("contenttype");
        //if ((ct==null)||(ct.equals(""))) {
            //ct="image/x-jpeg";
            //ct="image/bmp";
        System.out.println("FileView 1.0");
        System.out.println("requested file with ID: "+id+" content: "+ct+" Doctype:"+type);
        try {
            ServletOutputStream out = response.getOutputStream();
            byte[] f=this.getImage(id);
            response.setContentType(ct);
            out.write(f);
        } catch (Exception e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
    /** Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    /** Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    /** Returns a short description of the servlet.
    public String getServletInfo() {
        return "Displays a picture from the database identified by a parameter IMAGEID";
    private byte[] getImage(String id) throws IOException {
        Statement sta=null;
        Connection con=null;
        ResultSet rs=null;
        byte[] result=null;
        try {
            Context initContext = new InitialContext();
            Context envCtx = (Context) initContext.lookup("java:comp/env");
            DataSource ds = null;
            try{
                 ds = (DataSource)envCtx.lookup("jdbc/xxxxx");
            }catch ( javax.naming.NameNotFoundException ex){
                log("No context found for jdbc/xxxxx in java:comp/env Attempting to look it up in initial context");
                ds = (DataSource)initContext.lookup("jdbc/xxxxx");
            Connection conn = ds.getConnection();
            sta = conn.createStatement();
            if(type==null){rs=sta.executeQuery("SELECT * FROM tags where tagid="+id);}
            else if (type.toLowerCase ().equals("tag")){rs=sta.executeQuery("SELECT * FROM tags where tagid="+id);}
            else if (type.toLowerCase ().equals("crewdoc")){rs=sta.executeQuery("SELECT * FROM crewdocumentation where docid="+id);}
            if (rs.next()) {
                result=rs.getBytes("attachment");
                ct=rs.getString ("attachmentcontenttype");
                System.out.println("bytes returned : "+result.length);
            } else {
                System.out.println("Could find image with the ID specified or there is a problem with the database connection");
            rs.close();
            sta.close();
            conn.close();
        } catch (Exception e) {
            log(e.getMessage());
            e.printStackTrace();
       // ByteArrayOutputStream output = new ByteArrayOutputStream();
        //output.write(result, 78, result.length-78);
        //output.flush();
        //output.close();
        //return output.toByteArray();
        return result;
}I pinched both from examples i found on this forum using the search facility...
And this hyperlink retreives the file:
<ui:hyperlink binding="#{TagView.tagHyperlink}" id="tagHyperlink"
                                    text="#{TagView.tagsDataProvider.value['tags.attachmentfilename']}" url="/servlet/FileView/?id=%23%7BTagView.tagsDataProvider.value%5B'tags.tagid'%5D%7D+"&"+#{TagView.tagsDataProvider.value['tags.attachmentfilename']}"/>