JBoss 5实现
1 建一个EJBProject
2写一个接口

package ejb3inaction.example;

import javax.ejb.Remote;

@Remote
public interface HelloUser {
 public void sayHello(String name) ;
}

3写一个实现

package ejb3inaction.example;

import javax.ejb.Stateless;

@Stateless(mappedName="helloUserBean")
public class HelloUserBean implements HelloUser {

 public void sayHello(String name) {
  System.out.println("Hello " + name + " welcome to ejb3!") ;
 }

}

4部署到JBoss
5测试
可以新建一个web项目，在src加入jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

写一个测试的类

package ejb3inaction.example.test;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import ejb3inaction.example.HelloUser;

public class HelloUserTest {
 public static void main(String[] args)
 {
  Context context = null ;
  try {
   context = new InitialContext() ;
   HelloUser helloUser = (HelloUser)context.lookup("helloUserBean") ;
   helloUser.sayHello("gswang") ;
  } catch (NamingException e) {
   e.printStackTrace();
  }
 }
}