Servlet + EJB + Jsp

Hello,
I have an EJB CMP, called NewsBean. It's an EJB on a table News (Each line in the table is a Newspaper articles).
I have a JSP page, to look the news list.
And I have a servlet to prepare the data for the JSP page : The servlet call the Bean to access from the data base, the list of news
The bean gives the list of articles with the methode findByLiNews
My question is :
- What must the JSP use? The EJB? Do the JSP call mybean.findByLiNews('Article1").
- Do the servlet call the method mybean.findByLiNews?
Di the servlet creates an other bean to be used by the JSP page?
Thank's for your help

I would recommnd you to follow some standard design pattern for J2EE applications. Check j2ee 1.4 tutorial for proper ways to dsign/code your apps: http://java.sun.com/j2ee/1.4/docs/tutorial/doc/index.html
Speaking of your particular example I'd call bean methods strait from a JSP page - it is more proper and easier, see how this is done in Duke's Bank application: http://java.sun.com/j2ee/1.4/docs/tutorial/doc/Ebank4.html#wp79996

Similar Messages

How do I lookup an EJB 3.0 Session bean from servlet or JSP?

Does anyone knows how can I invoke an EJB from a servlet or JSP ?
I deployed a simple EJB on a Oracle Application Server 10g release 10.1.3 and I'm working with JDeveloper 10.1.3. I deployed the files via JDeveloper, and I didn´t specify any orion-ejb-jar.xml or ejb-jar.xml file
After deployment, the orion-ejb-jar.xml look like this in the server:
<?xml version="1.0" encoding="utf-8"?>
<orion-ejb-jar xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://xmlns.oracle.com/oracleas/schema/orion-ejb-jar-10_0.xsd" deployment-version="10.1.3.0.0" deployment-time="10b49516c8f" schema-major-version="10" schema-minor-version="0" >
<enterprise-beans>
<session-deployment name="HolaMundoEJB" location="HolaMundoEJB" local-location="HolaMundoEJB_HolaMundoEJBLocal" local-wrapper-name="HolaMundoEJBLocal_StatelessSessionBeanWrapper6" remote-wrapper-name="HolaMundoEJB_StatelessSessionBeanWrapper7" persistence-filename="HolaMundoEJB.home_default_group_1">
</session-deployment>
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<assembly-descriptor>
<default-method-access>
<security-role-mapping name="<default-ejb-caller-role>" impliesAll="true" />
</default-method-access>
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</orion-ejb-jar>
I'm trying to invoke the ejb in a servlet by doing the following:
public void doGet(HttpServletRequest request, ....
Context context = new InitialContext();
HolaMundoEJB helloWorld =
(HolaMundoEJB)context.lookup("java:com/env/ejb/HolaMundoEJB");
String respuesta = helloWorld.sayHello("David");
When i invoke the servlet I catch a NamingException whose message says something
like this ....java:com/env/ejb/HolaMundoEJB not found in webLlamaEJB
I tried different paths for the lookup but nothing....
Can anyone help me with this topic? Thank you.

Please try the following code:
HelloEJBBean.java:
@Stateless(name="Hello")
@Remote(value={Hello.class})
public class HelloEJBBean implements Hello { ... }
hello.jsp:
Context ctx = new InitialContext();
Hello h = (Hello)ctx.lookup("ejb/Hello");
web.xml:
<ejb-ref>
<ejb-ref-name>ejb/Hello</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<remote>fi.kronodoc.test.model.Hello</remote>
</ejb-ref>
i think you should also define jndi mappings for the references in orion-ejb-jar.xml and orion-web.xml but for some reason it seems to be working also without these.

Noob JSP + Servlet + EJB information for building J2EE simple web project.

I am new to Java. Covered basics and now jumping into making a simple web project. Project with functionality as below
1- CSS and Javascript use.
2- Managing user information (Add, Update, Delete, List)
3- Login form (Pass username, password and authenticate to create cookie)
4- Success/failure page.
That's what I want to make. I have lots of ASP.NET experience so its better to learn from making a project.
I need help like
1- Anyone know any open source web project from which I can learn to complete above tasks.
2- Any good latest J2EE 6 books to cover JSP, Servlts and EJB to make website.
3- Any video tutorials.
I am also looking around for the above information.
Thanks

pirzada wrote:
Is it better approach to keep business logic in Beans instead of Servlet/JSP. Looked more robust and clean?Usually you should keep the business logic (i.e. code) away from JSPs. That's how things were done 10 years ago, now we know better. Servlets and JSP can be used together so that a servlet has the business logic and JSPs are just "dumb views".
EJBs will/can help you when you need to worry about transaction isolation.
Then there's the dozens of other Java frameworks used for web design (and other purposes).
And the learning curve is high because it's a huge chunk of different technologies. It'll take you months to get proficient, years to become good.
But if you just want to whip up some web pages quickly, look at JSP/JSTL and Servlets. That'll give you a clean, but basic approach.

New To Iplanet app server.Can some one help me getting started by delpoying and calling one of each of these:JSP,Servlet,EJB.Tried with iplanet docs..didnt quite get it. thanx

Hi,
What is that you are trying to accomplish ? Is it deployment or
trying to develop applications ? Are you getting any errors ? If so,
please post them to help you. I think the documentation is the best place
for you to begin with.
Regards & Happy New Year
Raj
Arif Khan wrote:
New To Iplanet app server.Can some one help me getting started by
delpoying and calling one of each of these:JSP,Servlet,EJB.Tried with
iplanet docs..didnt quite get it. thanx
Try our New Web Based Forum at http://softwareforum.sun.com
Includes Access to our Product Knowledge Base!

Best way to see changes done to jsps/servlets/ejb/xmls in EAR

I am using iPlanet app server with iPlanet web server. Everytime i make any change jsp/servlet/ejb i have to redeploy whole ear application again. This takes a long time. Even when i use the "iasdeploy redployapp " command to deploy, it takes same amount of time as it takes for the orignal deployment.
So Is there any way to decrease the amount of the time it needs for me to re-deploy the applications when slight changes are made to application. I would really be thankful to anybody who can help me.

Hi,
I am facing this problem with a simple EAR file also. It does not contain any EJBs.
It has just JSPs, XML, and JAVA Classes.
The file size is about 481Kb.
Earlier this used to get deployed using the "iasdeploy" command within 1 minute.
Now it is taking more than 5 minutes to deploy the EAR file.
I am using the following command :
iasdeploy deployapp -verbose XYZ.ear
The same holds true for the "iasdeploy removeapp -verbose XYZ.ear" also.
Please help.
Thanks,
Samar

Ias support for EJB, JSP/servlets,JDBC, connection pooling, XML, SOAP, load balancing etc

Please let me know where I can find more information regarding iPlanet usage/deployment/configuring/tuning etc for support of technologies - like EJB, JSP/servlets, JDBC, connection pooling, XML, load balancing, JDBC & Transactions
(I have already read the 'Getting Started with the iPlanet Application Server' part five and six - http://developer.iplanet.com/appserver/testdrive/partfive.jsp and partsix.jsp)(I am using the ias testdrive version).

Hi,
It's difficult to explain unless the J2EE architecture is understood. Also, explaining things like load balancing, Transactions, tuning, are bit vague and could blow the disk space of this site.
To get started, the best way is to test the sample applications and the best part is you don't require internet connection to follow each steps. Install iWS and iAS, open browser, type in http://hostname:port/ias-samples/index.html. You can find links to the sample applications bundled. Please follow the steps given on deploying the application. This will enable you to a higher level.
Regards
Ganesh .R
Developer Technical Support
Sun Microsystems
http://www.sun.com/developers/support

Servlets/JDBC vs. servlets/EJB performance comparison/benchmark

I have a PHB who believes that EJB has no ___performance___ benefit
against straightforward servlets/JSP/JDBC. Personally, I believe that
using EJB is more scalable instead of using servlets/JDBC with
connection pooling.
However, I am at a lost on how to prove it. There is all the theory, but
I would appreciate it if anyone has benchmarks or comparison of
servlets/JSP/JDBC and servlets/JSP/EJB performance, assuming that they
were tasked to do the same thing ( e.g. performance the same SQL
statement, on the same set of tables, etc. ).
Or some guide on how to setup such a benchmark and prove it internally.
In other words, the PHB needs numbers, showing performance and
scalability. In particular, I would like this to be in WLS 6.0.
Any help appreciated.

First off, whether you use servlets + JDBC or servlets + EJB, you'll
most likely spend much of your time in the database.
I would strongly suggest that you avoid the servlets + JDBC
architecture. If you want to do straight JDBC code, then it's
preferable to use a stateless session EJB between the presentation layer
and the persistence layer.
So, you should definitely consider an architecture where you have:
servlets/jsp --> stateless session ejb --> JDBC code
Your servlet / jsp layer handles presentation.
The stateless session EJB layer abstracts the persistence layer and
handles transaction demarcation.
Modularity is important here. There's no reason that your presentation
layer should be concerned with your persistence logic. Your application
might be re-used or later enhanced with an Entity EJB, or JCA Connector,
or a JMS queue providing the persistence layer.
Also, you will usually have web or graphic designers who are modifying
the web pages. Generally, they should not be exposed to transactions
and jdbc code.
We optimize the RMI calls so they are just local method calls. The
stateless session ejb instances are pooled. You won't see much if any
performance overhead.
-- Rob
jms wrote:
>
I have a PHB who believes that EJB has no ___performance___ benefit
against straightforward servlets/JSP/JDBC. Personally, I believe that
using EJB is more scalable instead of using servlets/JDBC with
connection pooling.
However, I am at a lost on how to prove it. There is all the theory, but
I would appreciate it if anyone has benchmarks or comparison of
servlets/JSP/JDBC and servlets/JSP/EJB performance, assuming that they
were tasked to do the same thing ( e.g. performance the same SQL
statement, on the same set of tables, etc. ).
Or some guide on how to setup such a benchmark and prove it internally.
In other words, the PHB needs numbers, showing performance and
scalability. In particular, I would like this to be in WLS 6.0.
Any help appreciated.--
Coming Soon: Building J2EE Applications & BEA WebLogic Server
by Michael Girdley, Rob Woollen, and Sandra Emerson
http://learnweblogic.com

Differences between WL or Netscape for Servlets and JSP's

What are the advantages / disadvantages of running Servlets under WL,
          vs. say, running them in Netscape's servlet engine? Assuming EJB
          container is run separately, either one of these could make calls to the
          WL EJB server, so perhaps it would be simpler and faster to run servlets
          and JSP's under Netscape, and have them call via t3 into a weblogic
          server for EJB's?
          Thoughts
          david
          David Michaels <[email protected]>
          Director of Technology
          ShockMarket Corporation (650) 330-4665
          [david.vcf]


David,
          One of the major reasons to run your servlets on Weblogic is that we have an
          optimization that allows us to pass by reference objects when calling from
          servlets to EJB. This makes things much faster.
          A number of our customers, in addition, have seen performance problems when
          using other servlet engines. It just seems to cause problems due to their
          threading models etc.
          Finally, our servlet engine is by far the most mature and robust on the
          market today. Our JSP implementation is also the best in terms of
          performance.
          Thanks,
          Michael
          Michael Girdley
          WLS Product Manager
          David Michaels <[email protected]> wrote in message
          news:[email protected]..
          > What are the advantages / disadvantages of running Servlets under WL,
          > vs. say, running them in Netscape's servlet engine? Assuming EJB
          > container is run separately, either one of these could make calls to the
          > WL EJB server, so perhaps it would be simpler and faster to run servlets
          > and JSP's under Netscape, and have them call via t3 into a weblogic
          > server for EJB's?
          >
          > Thoughts
          >
          > david
          >
          > --
          > David Michaels <[email protected]>
          > Director of Technology
          > ShockMarket Corporation (650) 330-4665
          >
          >

What do I need to compile and run Servlets and JSP?

Hi there,
What do I need to run Servlets and JSP? I am developing on a Windows platform.
As far as I know, Tomcat and JDK is needed. My JDK (1.3rc1) cannot seem to compile servlet files (javax.servlet.* not found)
Can anyone please advise?
Thank you in advance.

If you mean "in a month", then the answer is "afaik, no.", sorry.
If you need something comfortable, you better should buy one of these heavy-weighters like Weblogic, or WebSphere. Cost some $$$$'s, though (between 2000-10000. I guess).
For servlets (and ejb's too), there is no "easy and quick" solution. You probably should think about buying a freelancer or such, which already has the appropriate know-how.

EJB+JSP versus PHP

What is the advantage of using EJB+JSP for a web ticket selling application instead of using PHP?
Can Java support more customer hits compare to PHP?
Is EJB+JSP better than PHP? Why?

I know both PHP and Java. PHP is a more rapid development tool than Java. Once you know it, it is just easier to make simple pages out of it vs Java. In some ways PHP is easier to develop in and in some ways it is harder.
There is no real IDE for PHP. There are some tools for real time syntax checking (Komodo) and debugging, but they are not as mature as the pick of current Java IDE's.
In reverse, there is never a need to restart a server when updating a php file unlike Java. This is not a problem with JSP's, but when you change servlets the server will unload all classes from memory and reload. This is a major pain if you are working on a production server.
I have created a game clan site with many functions using PHP and an order processing section of someones web site. It is fine for smaller projects and is very fast to develop in, however PHP does not scale as well as Java. A large enterprise system is better suited to using Java.
Also, PHP is a loosely typed language. This has many nuances that are different from a strongly typed language like java. OOP is definately not as powerful in PHP, as there is no private, protected and public typing of methods and fields. You can make classes and even extend classes, but it is poorly implimented IMO. I did all my PHP OOP style, but did not use any inheritance. The limitations of OOP principles is probably the most restrictive aspect of PHP that I can see.

Employee example:... resource [employee/servlet/NewEmployee.jsp] not found

Hi,
i installed an erp system 6.0 on windows server 2008. then i installed the netweaver developer studio on my local computer. i tried the example from the book: java-programmierung mit dem sap web application server (dont know the english title)
well, i deployd the example and wanted to see the jsp with the url: http://<servername>:<port>/employee/view
this does not work, i get the following error:
The request cannot be processed.
Details:
com.sap.engine.services.servlets_jsp.server.exceptions.ServletNotFoundException: Requested resource [employee/servlet/NewEmployee.jsp] not found.
Then i tried the url: http://<server>:<port>/employee/NewEmployee.jsp, got following error:
Application error occurred during the request procession.
Details:
com.sap.engine.services.servlets_jsp.server.exceptions.WebIOException:
Error compiling [/NewEmployee.jsp] of alias [employee] of J2EE application [sap.com/EmployeeEar].
so i think theres something wrong with my jsp. but i dont see it.
here is my jsp:
<%@ page language="java" %>
<html>
<body style="font-family:Arial;" bgcolor="D2D8E1">
<%@ page import="javax.naming.*" %>
<%@ page import="javax.ejb.*" %>
<%@ page import="com.sap.demo.*" %>
<%@ page import="java.util.*" %>
<h2>
Register New Employee
</h2>
<form action="NewEmployee.jsp" method="POST" name="NewEmployee">
<table border=0 align=center>
<tr>
<td width="220">First name: <td>
<input type="text" name="firstname" value="" size="20">
<tr>
<td width="220">Last name: <td>
<input type="text" name="lastname" value="" size="20">
<tr>
<td width="220">Department: <td>
     <select name="department">
     <option value="DEVELOPMENT">Development</option>
     <option value="TRAINING">Training</option>
     <option value="MANAGEMENT">Management</option>
     <option value="ARCHITECTURE">Architecture</option>
     </select>
<tr>
<td><td><br><input type="submit" value="Create" name="create">
</table>
<br>
</form>
<%
String lName = request.getParameter("lastname");
String fName = request.getParameter("firstname");
String eDepartment = request.getParameter("department");
if(lName == null || fName == null || lName.length() == 0 || fName.length() == 0)
return;
try{
Context jndiContext = new InitialContext();
Object ref = jndiContext.lookup("java:comp/env/ejb/EmployeeService");
javax.rmi.PortableRemoteObject.narrow(ref, EmployeeServicesHome.class);
EmployeeServicesHome empHome = (EmployeeServicesHome) ref;
EmployeeServices empSession = empHome.create();
long empId = empSession.registerEmployee(fName, lName, eDepartment);
if(empId == 0)
out.println("<H3> Failed! </H3>");
else
out.println("<H3> Success! </H3>");
catch (Exception e) {
     out.println("<H3>"e.toString()"</H3>");
     e.printStrackTrace(System.out);
     return;
%>
</body>
</html>
if you see the reason or if you have andy idea why it doesnt work, please help me
thank you

Is it exactly how you have written ?
out.println("
"e.toString()"
You can read it as:
out.println(""e.toString()"");
I do not think it is correct
replace it either with
out.println(""e.toString()"");
OR
out.println(e.toString());

How to get an ArrayList Object in servlet from JSP?

How to get an ArrayList Object in servlet from JSP?
hi all
please give the solution for this without using session and application...
In test1.jsp file
i am setting values for my setter methods using <jsp:usebean> <jsp:setproperty> tags as shown below.
After that i am adding the usebean object to array list, then using request.setAttribute("arraylist object")
---------Code----------
<jsp:useBean id="payment" class="com.common.PaymentHandler" scope="request" />
<jsp:setProperty name="payment" property="strCreditCardNo" param="creditCardNumber" />
<%-- <jsp:setProperty name="payment" property="iCsc" param="securityCode" /> --%>
<jsp:setProperty name="payment" property="strDate" param="expirationDate" />
<jsp:setProperty name="payment" property="strCardType" param="creditCardType" />
<%--<jsp:setProperty name="payment" property="cDeactivate" param="deactivateBox" />
<jsp:setProperty name="payment" property="fAmount" param="depositAmt" />
<jsp:setProperty name="payment" property="fAmount" param="totalAmtDue" /> --%>
<jsp:useBean id="lis" class="java.util.ArrayList" scope="request">
<%
lis.add(payment);
%>
</jsp:useBean>
<%
request.setAttribute("lis1",lis);
%>
-----------Code in JSP-----------------
In testServlet.java
i tried to get the arraylist object in servlet using request.getAttribute
But I unable to get that arrayObject in servlet.....
So if any one help me out in this, it will be very helpfull to me..
Thanks in Advance
Edward

Hi,
Im also facing the similar problen
pls anybody help..
thax in advance....
Litty

How to convert this Servlet into JSP

I am trying to convert this Servlet into JSP page.
How do I go about doing this?
Thanks.
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.text.*;
/** Shows all items currently in ShoppingCart. Clients
* have their own session that keeps track of which
* ShoppingCart is theirs. If this is their first visit
* to the order page, a new shopping cart is created.
* Usually, people come to this page by way of a page
* showing catalog entries, so this page adds an additional
* item to the shopping cart. But users can also
* bookmark this page, access it from their history list,
* or be sent back to it by clicking on the "Update Order"
* button after changing the number of items ordered.
* <P>
* Taken from Core Servlets and JavaServer Pages 2nd Edition
* from Prentice Hall and Sun Microsystems Press,
* http://www.coreservlets.com/.
* © 2003 Marty Hall; may be freely used or adapted.
public class OrderPage extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession();
ShoppingCart cart;
synchronized(session) {
cart = (ShoppingCart)session.getAttribute("shoppingCart");
// New visitors get a fresh shopping cart.
// Previous visitors keep using their existing cart.
if (cart == null) {
cart = new ShoppingCart();
session.setAttribute("shoppingCart", cart);
String itemID = request.getParameter("itemID");
if (itemID != null) {
String numItemsString =
request.getParameter("numItems");
if (numItemsString == null) {
// If request specified an ID but no number,
// then customers came here via an "Add Item to Cart"
// button on a catalog page.
cart.addItem(itemID);
} else {
// If request specified an ID and number, then
// customers came here via an "Update Order" button
// after changing the number of items in order.
// Note that specifying a number of 0 results
// in item being deleted from cart.
int numItems;
try {
numItems = Integer.parseInt(numItemsString);
} catch(NumberFormatException nfe) {
numItems = 1;
cart.setNumOrdered(itemID, numItems);
// Whether or not the customer changed the order, show
// order status.
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Status of Your Order";
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
out.println(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=\"CENTER\">" + title + "</H1>");
synchronized(session) {
List itemsOrdered = cart.getItemsOrdered();
if (itemsOrdered.size() == 0) {
out.println("<H2><I>No items in your cart...</I></H2>");
} else {
// If there is at least one item in cart, show table
// of items ordered.
out.println
("<TABLE BORDER=1 ALIGN=\"CENTER\">\n" +
"<TR BGCOLOR=\"#FFAD00\">\n" +
" <TH>Item ID<TH>Description\n" +
" <TH>Unit Cost<TH>Number<TH>Total Cost");
ItemOrder order;
// Rounds to two decimal places, inserts dollar
// sign (or other currency symbol), etc., as
// appropriate in current Locale.
NumberFormat formatter =
NumberFormat.getCurrencyInstance();
// For each entry in shopping cart, make
// table row showing ID, description, per-item
// cost, number ordered, and total cost.
// Put number ordered in textfield that user
// can change, with "Update Order" button next
// to it, which resubmits to this same page
// but specifying a different number of items.
for(int i=0; i<itemsOrdered.size(); i++) {
order = (ItemOrder)itemsOrdered.get(i);
out.println
("<TR>\n" +
" <TD>" + order.getItemID() + "\n" +
" <TD>" + order.getShortDescription() + "\n" +
" <TD>" +
formatter.format(order.getUnitCost()) + "\n" +
" <TD>" +
"<FORM>\n" + // Submit to current URL
"<INPUT TYPE=\"HIDDEN\" NAME=\"itemID\"\n" +
" VALUE=\"" + order.getItemID() + "\">\n" +
"<INPUT TYPE=\"TEXT\" NAME=\"numItems\"\n" +
" SIZE=3 VALUE=\"" +
order.getNumItems() + "\">\n" +
"<SMALL>\n" +
"<INPUT TYPE=\"SUBMIT\"\n "+
" VALUE=\"Update Order\">\n" +
"</SMALL>\n" +
"</FORM>\n" +
" <TD>" +
formatter.format(order.getTotalCost()));
String checkoutURL =
response.encodeURL("../Checkout.html");
// "Proceed to Checkout" button below table
out.println
("</TABLE>\n" +
"<FORM ACTION=\"" + checkoutURL + "\">\n" +
"<BIG><CENTER>\n" +
"<INPUT TYPE=\"SUBMIT\"\n" +
" VALUE=\"Proceed to Checkout\">\n" +
"</CENTER></BIG></FORM>");
out.println("</BODY></HTML>");
}

Sorry.
actually this is my coding on the bottom.
Pleease disregard my previous coding. I got the different one.
My first approach is using <% %> around the whole doGet method such as:
<%
String[] ids = { "hall001", "hall002" };
setItems(ids);
setTitle("All-Time Best Computer Books");
out.println("<HR>\n</BODY></HTML>");
%>
I am not sure how to break between code between
return;
and
response.setContentType("text/html");
Here is my coding:
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
     String[] ids = { "hall001", "hall002" };
     setItems(ids);
     setTitle("All-Time Best Computer Books");
if (items == null) {
response.sendError(response.SC_NOT_FOUND,
"Missing Items.");
return;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
out.println(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=\"CENTER\">" + title + "</H1>");
CatalogItem item;
for(int i=0; i<items.length; i++) {
out.println("<HR>");
item = items;
if (item == null) {
out.println("<FONT COLOR=\"RED\">" +
"Unknown item ID " + itemIDs[i] +
"</FONT>");
} else {
out.println();
String formURL =
"/servlet/coreservlets.OrderPage";
formURL = response.encodeURL(formURL);
out.println
("<FORM ACTION=\"" + formURL + "\">\n" +
"<INPUT TYPE=\"HIDDEN\" NAME=\"itemID\" " +
" VALUE=\"" + item.getItemID() + "\">\n" +
"<H2>" + item.getShortDescription() +
" ($" + item.getCost() + ")</H2>\n" +
item.getLongDescription() + "\n" +
"<P>\n<CENTER>\n" +
"<INPUT TYPE=\"SUBMIT\" " +
"VALUE=\"Add to Shopping Cart\">\n" +
"</CENTER>\n<P>\n</FORM>");
out.println("<HR>\n</BODY></HTML>");

Error in accessing servlet from JSP

Hello everybody,
When I access a servlet from a JSP page,I am getting the following error message :
Error 404--Not Found
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.5 404 Not Found
The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.
If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.
I am using Weblogic 7.0 and my web.xml code is as follows:
<web-app>
<servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>TestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/TestServlet</url-pattern>
</servlet-mapping>
</web-app>
I am accessing the servlet from a javascript function in my JSP page.
I am quite new to the Java technology. So any help in this regard would be highly appreciated.
Thanks in advance,

The form action event is in a javascript function. I am sorry I mentioned that I am accessing this servlet from JSP. Actually,this servlet is accessed from an HTML document.
The following is the javascript code:
<script language="javascript">
function lfnCallNext()
     alert("In the function");
     frmMain.method="POST";
     frmMain.action="/TestServlet";
     frmMain.hidChoice.value="GetList";
     frmMain.submit();
</script>
And this function is called from an hyperlink as follows:
Work with Employee Database
Thanks,

Change protocol when redirecting a request for a servlet to jsp

Hello,
In my servlet, There is a line of code:
getServletConfig().getServletContext().getRequestDispatcher("/page.jsp").forward(request,response);
My question is: I'd like to change the current protocol (like http) to new protocol (like https) or versa vista before my servlet executes the above line.
Is this possible to implement that? If so, how can I do it?
If not implement, Is there any ways to convert back or forward between http and https protocols in java, servlet or jsp?
I did try to use window.location.href="protocol://myserver/..." in javascript to redirect the jsp page to the right protocol, but the session for the browser was lost, and the jsp page ran into infinite loop.
Thanks in advance for any helps.
Mike.

if (!request.isSecure()) response.sendRedirect("https://me.com/page.jsp");
(or visa versa)

Servlet + EJB + Jsp

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