How to call EJB's in JSP's

[hanuman]

can i call EJB's in Jsp

[Assyst]

can i call EJB's in Jsp

Yes , You can call EJB in JSP , Similar to how you call Java Beans in JSP

[tejunamu]

The following is a code snippet that demonstrates how a JSP page can interact with an EJB session bean:

<%@ page import="javax.naming.*, javax.rmi.PortableRemoteObject,
foo.AccountHome, foo.Account" %>
<%!
//declare a "global" reference to an instance of the home interface of the session bean
AccountHome accHome=null;

public void jspInit()
{
//obtain an instance of the home interface

InitialContext cntxt = new InitialContext( );
Object ref= cntxt.lookup("java:comp/env/ejb/AccountEJB");
accHome = (AccountHome)PortableRemoteObject.narrow(ref,Accou ntHome.class);
}
%>
<%
//instantiate the session bean

Account acct = accHome.create();
//invoke the remote methods

acct.doWhatever(...);
// etc etc...
%>

[r035198x]

The following is a code snippet that demonstrates how a JSP page can interact with an EJB session bean:

<%@ page import="javax.naming.*, javax.rmi.PortableRemoteObject,
foo.AccountHome, foo.Account" %>
<%!
//declare a "global" reference to an instance of the home interface of the session bean
AccountHome accHome=null;

public void jspInit()
{
//obtain an instance of the home interface

InitialContext cntxt = new InitialContext( );
Object ref= cntxt.lookup("java:comp/env/ejb/AccountEJB");
accHome = (AccountHome)PortableRemoteObject.narrow(ref,Accou ntHome.class);
}
%>
<%
//instantiate the session bean

Account acct = accHome.create();
//invoke the remote methods

acct.doWhatever(...);
// etc etc...
%>

Thanks for diiging this up

[dmjpro]

can u figure me out the j2ee and ejb in javaworld

[r035198x]

can u figure me out the j2ee and ejb in javaworld

What do you mean by this?

[dmjpro]

these two things are not clear to me ......

[r035198x]

these two things are not clear to me ......

You mean you don't understand what j2ee and ejb are?
Well the truth is I won't be able to explain both of them in one post.

J2EE is an architecture for making webservices and perhaps other types of systems as well. the difference with J2SE (which is the standard Java) is the presence of JSPs, Servlets (both of which can only run on a server) and the enterprise java beans(of which there are three types session, message and entity types.) Often the architecture uses JSPs for the front of the system (JSPs are HTML pages with Java code ambedded in them), Servlets for controlling the system (These are Java classes which run on a server), and ejbs for the business logic and storage of data. JSPs are actually compiled into Servlets first and so they have to run on the server as well. There is really much more to these things than I've said here.

[dmjpro]

that means ejb is a part of j2ee architecture ....

thanks fo ur reply .....