Solved

Need JSP, EJB, and database example

Posted on 2004-10-15
7
896 Views
Last Modified: 2010-04-01
Hi,

I'm new to J2ee and I need to build an application that uses JSP, EJB (BMP entity bean), and datatabase, preferrably pointbase.  I have been using examples from the J2EE tutorial (downloadable from Sun's website), such as the bookstore example (see bookstore2 example), but it uses javabean, not EJB.  I've created the table I needed in pointbase (included w/ the J2EE 1.4) and I've created the EJB's.  Now I just need help in making this all connect w/ JSP.  Can anyone point me to a site w/ such examples for me me look at or show me sample JSP code that accesses data using EJB?  Please include any deployment information that I also need to know about.  

Since the examples I have been working with uses JSTL and not scripts, examples w/ JSTL would be better and less confusing.

Thanks.
0
Comment
Question by:skip1000
  • 3
  • 2
  • 2
7 Comments
 
LVL 14

Assisted Solution

by:boonleng
boonleng earned 50 total points
Comment Utility
Have you read the J2EE blueprints?
http://java.sun.com/blueprints/patterns/index.html
http://java.sun.com/blueprints/corej2eepatterns/Patterns/index.html

It provides the J2EE structure/pattern and shows how all the components connected to each others.
There's many sample codes and for you case you would be looking at Business Delegate and Service Locator.

Demo:
http://java.sun.com/blueprints/code/index.html#java_pet_store_demo
0
 

Author Comment

by:skip1000
Comment Utility
I took a look at the petstore project included w/ J2EE bundle.  The app was really too huge for my purpose.  It also did not have any example of how JSP would reference an EJB to perform select, insert, update, and delete on a database.  I haven't any success finding such an example yet.

This poses a question:  Does the real world use JSP w/ entity EJB to perform action on a databse?  Can some present an example of how this is done, if such things exist?  That's EJB, not javabean.

Thanks
0
 
LVL 13

Accepted Solution

by:
petmagdy earned 450 total points
Comment Utility
If u want a small sample on oracle database for JSP calling BMP EJB provide me with ur email and i can send u a clear sample
0
Highfive + Dolby Voice = No More Audio Complaints!

Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

 

Author Comment

by:skip1000
Comment Utility
Hi petmagdy,

Pls send code to the following address johnstone59@yahoo.com.  Thanks.
0
 
LVL 13

Expert Comment

by:petmagdy
Comment Utility
I will send it to u with instructions
0
 
LVL 14

Expert Comment

by:boonleng
Comment Utility
You can have JSP with entity EJB, but is not advisable.

JSP represent the view and entity bean represent the integration with the database(persistance layer), if use JSP to call entity bean means you have skip the control and business layer. This will expose the business logic (security issue), and wont be able to use the CMP features(tranasction management). This will also cause network overhead and performance degradation when calling multiple entity bean at the same time.

Regards,
Boon Leng
0
 

Author Comment

by:skip1000
Comment Utility
Here's the sample code of jsp to access entitiy ejb:

<%@ page  language="java"  
import="javax.ejb.*, javax.naming.*, examples.ejb20.basic.beanManaged.*, java.util.*"  %>

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
    <title>untitled</title>
  </head>
 
 <%
            Collection accounts = new Vector();
    try
            {
                  final InitialContext context = new InitialContext();
                  AccountLocalHome accountLocalHome = (AccountLocalHome) context.lookup("java:comp/env/ejb/Account");
                  accounts = accountLocalHome.findBigAccounts(0.0);
            }
            catch( Exception ex)
            {
                  
            }
   
%>
 
  <body>
<%
    int itemsCount = accounts.size();
    if(itemsCount == 0)
    {
        out.print("No Accounts were found!");
    }
    else
    {
%>
<table border="0" width="100%">
  <tr>
    <td width="20%" align="center"><b>ID</b></td>
    <td width="30%" align="center"><b>BAL</b></td>
  </tr>

<%
      Iterator iterator = accounts.iterator();
      while( iterator.hasNext() )
      {
        AccountLocal accountLocal = (AccountLocal) iterator.next();
%>

<table border="0" width="100%">
  <tr>
    <td width="20%" align="center"><b><%=accountLocal.getAccountId() %></b></td>
    <td width="30%" align="center"><b><%=accountLocal.balance() %></b></td>
  </tr>

<%
      }
    }
%>
  </body>
</html>
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Suggested Solutions

In this article, you will read about the trends across the human resources departments for the upcoming year. Some of them include improving employee experience, adopting new technologies, using HR software to its full extent, and integrating artifi…
In this step by step tutorial with screenshots, we will show you HOW TO: Enable SSH Remote Access on a VMware vSphere Hypervisor 6.5 (ESXi 6.5). This is important if you need to enable SSH remote access for additional troubleshooting of the ESXi hos…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

763 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now