how to send and retrieve image along with text to and from database

how to send and retrieve image along with text to and from database

im using app engine and i have two logics from different sources and i want to combine them. ive used the greeting example from app engine and i have a random image generator. im so stumped right now and i dont know how to combine the two. i want to take the random image along with the text and send it to another user for work. the application takes a random image for which code i have along with text that the user fills out based on the writing exercise about the random image and on the post it sends the data to another user. i hope im explaining this correctly

this is app engines greeting application

package guestbook;

import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

import java.io.IOException;
import java.util.Date;
import java.util.logging.Logger;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SignGuestbookServlet extends HttpServlet {
    private static final Logger log =
            Logger.getLogger(SignGuestbookServlet.class.getName());

    public void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws IOException {
        UserService userService = UserServiceFactory.getUserService();
        User user = userService.getCurrentUser();

        // We have one entity group per Guestbook with all Greetings residing
        // in the same entity group as the Guestbook to which they belong.
        // This lets us run an ancestor query to retrieve all Greetings for a
        // given Guestbook. However, the write rate to each Guestbook should be
        // limited to ~1/second.
        String guestbookName = req.getParameter("guestbookName");
        Key guestbookKey = KeyFactory.createKey("Guestbook", guestbookName);
        String content = req.getParameter("content");
        Date date = new Date();
        Entity greeting = new Entity("Greeting", guestbookKey);
        greeting.setProperty("user", user);
        greeting.setProperty("date", date);
        greeting.setProperty("content", content);

        DatastoreService datastore =
                DatastoreServiceFactory.getDatastoreService();
        datastore.put(greeting);

        resp.sendRedirect("/guestbook.jsp?guestbookName="
                + guestbookName);
    }
}

//the guestbook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page import="java.util.List" %>
<%@ page import="com.google.appengine.api.users.User" %>
<%@ page import="com.google.appengine.api.users.UserService" %>
<%@ page import="com.google.appengine.api.users.UserServiceFactory" %>
<%@ page import="com.google.appengine.api.datastore.DatastoreServiceFactory" %>
<%@ page import="com.google.appengine.api.datastore.DatastoreService" %>
<%@ page import="com.google.appengine.api.datastore.Query" %>
<%@ page import="com.google.appengine.api.datastore.Entity" %>
<%@ page import="com.google.appengine.api.datastore.FetchOptions" %>
<%@ page import="com.google.appengine.api.datastore.Key" %>
<%@ page import="com.google.appengine.api.datastore.KeyFactory" %>

<html>
  <head>
    <link type="text/css" rel="stylesheet" href="/stylesheets/main.css" />
  </head>

  <body>
<DIV id="container">
<DIV id="left">
<%
    String guestbookName = request.getParameter("guestbookName");
    if (guestbookName == null) {
        guestbookName = "default";
    }
    UserService userService = UserServiceFactory.getUserService();
    User user = userService.getCurrentUser();
    if (user != null) {
%>

<p>Hello, <%= user.getNickname() %>! (You can
<a href="<%= userService.createLogoutURL(request.getRequestURI()) %>">sign out</a>.)</p>
<%
    } else {
%>
<p>Hello!
<a href="<%= userService.createLoginURL(request.getRequestURI()) %>">Sign in</a>
to include your name with greetings you post.</p>
<%
    }
%>


<%
    DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
    Key guestbookKey = KeyFactory.createKey("Guestbook", guestbookName);
    // Run an ancestor query to ensure we see the most up-to-date
    // view of the Greetings belonging to the selected Guestbook.
    Query query = new Query("Greeting", guestbookKey).addSort("date", Query.SortDirection.DESCENDING);
    List<Entity> greetings = datastore.prepare(query).asList(FetchOptions.Builder.withLimit(5));
    if (greetings.isEmpty()) {
        %>
        <p>Guestbook '<%= guestbookName %>' has no messages.</p>
        <%
    } else {
        %>
        <p>Messages in Guestbook '<%= guestbookName %>'.</p>
        <%
        for (Entity greeting : greetings) {
            if (greeting.getProperty("user") == null) {
                %>
                <p>An anonymous person wrote:</p>
                <%
            } else {
                %>
                <p><b><%= ((User) greeting.getProperty("user")).getNickname() %></b> wrote:</p>
                <%
            }
            %>
            <blockquote><%= greeting.getProperty("content") %></blockquote>
            <%
        }
    }
%>
</DIV>
<DIV id="right">
<form action="/sign" method="post" style="width: 552px; ">
      <div><textarea name="content" rows="3" cols="60"></textarea></div>
      <div><input type="submit" value="Post Greeting"></div>
      <input type="hidden" name="guestbookName" value="<%= guestbookName %>">
    </form>
    </DIV>
    </DIV>    
  </body>
</html>

/*random image generator

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<style type="text/css">
html,body {
height:100%;
margin:0;
padding:0;
}
#imlocation {
width:100%;
height:100%;
border:3px double #999;
margin:2% auto;
}
#imlocation img {
width:100%;
height:100%;
}
</style>

<body>

<div id="imlocation" align="right">

<script type="text/javascript">
<!--
 var imlocation = "images/forest/";
 var currentdate = 0;
 var image_number = 0;
 function ImageArray (n) {
   this.length = n;
   for (var i =1; i <= n; i++) {
     this[i] = ' '
   }
 }
 image = new ImageArray(61)
 image[0] = 'img0.jpg'
 image[1] = 'img1.jpg'
 image[2] = 'img2.jpg'
 image[3] = 'img3.jpg'
 image[4] = 'img4.jpg'
 image[5] = 'img5.jpg'
 image[6] = 'img6.jpg'
 image[7] = 'img7.jpg'
 image[8] = 'img8.jpg'
 image[9] = 'img9.jpg'
 image[10] = 'img10.jpg'
 image[11] = 'img11.jpg'
 image[12] = 'img12.jpg'
 image[13] = 'img13.jpg'
 image[14] = 'img14.jpg'
 image[15] = 'img15.jpg'
 image[16] = 'img16.jpg'
 image[17] = 'img17.jpg'
 image[18] = 'img18.jpg'
 image[19] = 'img19.jpg'
 image[20] = 'img20.jpg'
 image[21] = 'img21.jpg'
 image[22] = 'img22.jpg'
 image[23] = 'img23.jpg'
 image[24] = 'img24.jpg'
 image[25] = 'img25.gif'
 image[26] = 'img26.jpg'
 image[27] = 'img27.jpg'
 image[28] = 'img28.jpg'
 image[29] = 'img29.jpg'
 image[30] = 'img30.jpg'
 image[31] = 'img31.jpg'
 image[32] = 'img32.jpg'
 image[33] = 'img33.jpg'
 image[34] = 'img34.jpg'
 image[35] = 'img35.jpg'
 image[36] = 'img36.jpg'
 image[37] = 'img37.jpg'
 image[38] = 'img38.jpg'
 image[39] = 'img39.jpg'
 image[40] = 'img40.jpg'
 image[41] = 'img41.jpg'
 image[42] = 'img42.jpg'
 image[43] = 'img43.jpg'
 image[44] = 'img44.jpg'
 image[45] = 'img45.jpg'
 image[46] = 'img46.jpg'
 image[47] = 'img47.jpg'
 image[48] = 'img48.jpg'
 image[49] = 'img49.jpg'
 image[50] = 'img50.jpg'
 image[51] = 'img51.jpg'
 image[52] = 'img52.jpg'
 image[53] = 'img53.jpg'
 image[54] = 'img54.jpg'
 image[55] = 'img55.jpg'
 image[56] = 'img56.jpg'
 image[57] = 'img57.jpg'
 image[58] = 'img58.jpg'
 image[59] = 'img59.jpg'
 image[60] = 'img60.jpg'
 var rand = 60/image.length
 function randomimage() {
    currentdate = new Date()
    image_number = currentdate.getSeconds()
    image_number = Math.floor(image_number/rand)
    return(image[image_number])
 }
 document.write("<img src='" + imlocation + randomimage()+ "'>");
//-->
</script>
</div>
</body>
</html>

what i want it to do is send the random image along with the text to the database if the user presses the button. thanks im hoping for an answer

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