Recently I always used the Spring+Hibernate+Struts frameworks to persist data into db,
But EJB3 is the standard spec of J2EE,so try to migrate JBoss4.0.5GA J2EE container to study EJB3.
Install:
1.JBoss4.0.5GA(download it ok,then unzip it in a folder) http://jboss.org
2.Obtain the EJB3 for JBoss4.0.5GA patch, http://labs.jboss.com/portal/jbossejb3/download/index.html
3.according to the EJB3 install patch:
$ cd jboss-EJB-3.0_RC9-FD-patch1
$ ant -f install.xml -Djboss.server.config=all
4.then Run the server use below command:
$cd jboss\bin
$ run -c all
5.Now it's time to put down your ejb3 and test codes.
for explain the progress,all the codes are very simple(stateless session bean).
EBJ3:
interface
package com.aaron.ejb3
public interface HelloWorld {
public String SayHello(String name);
}
implement
package com.aaron.ejb3
import javax.ejb.Remote;
import javax.ejb.Stateless;
@Stateless
@Remote ({HelloWorld.class})
public class HelloWorldBean implements HelloWorld {
public String SayHello(String name) {
return name +"say:Hello world this is the first EJB3";
}
}
Write a jsp for test the EJB3:
<%@ page contentType="text/html; charset=GB2312"%>
<%@ page import="package com.aaron.ejb3.HelloWorld, javax.naming.*, java.util.Properties"%>
<%
Properties props = new Properties();
props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
props.setProperty("java.naming.provider.url", "localhost:1099");
props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");
InitialContext ctx;
try {
ctx = new InitialContext(props);
HelloWorld helloworld = (HelloWorld) ctx.lookup("HelloWorldBean/remote");
out.println(helloworld.SayHello("Aaron"));
} catch (NamingException e) {
out.println(e.getMessage());
}
%>
6.Deploy the EJB3 and jsp
compile the EJB3 and package it for jar file,
and create a web structure including the above jsp file.
Run the jsp file.
