EJB2.0 HelloWorld 程序.

1.TradeBean.java 代码如下:

import java.rmi.RemoteException;

import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;

/**
 * XDoclet-based session bean.  The class must be declared
 * public according to the EJB specification.
 *
 * To generate the EJB related files to this EJB:
 *		- Add Standard EJB module to XDoclet project properties
 *		- Customize XDoclet configuration for your appserver
 *		- Run XDoclet
 *
 * Below are the xdoclet-related tags needed for this EJB.
 * 
 * @ejb.bean name="Trade"
 *           display-name="Name for Trade"
 *           description="Description for Trade"
 *           jndi-name="ejb/Trade"
 *           type="Stateless"
 *           view-type="both"
 */
public class TradeBean implements SessionBean {

	/** The session context */
	private SessionContext context;

	public TradeBean() {
		super();
	}

	public void ejbCreate() throws EJBException{
		System.out.println(" ejb create ");
	}
	
	public void ejbActivate() throws EJBException, RemoteException {
		System.out.println(" ejb activate ");
	}

	public void ejbPassivate() throws EJBException, RemoteException {
		System.out.println(" ejb passivage ");
	}

	public void ejbRemove() throws EJBException, RemoteException {
		System.out.println(" ejb remove ");
	}

	/**
	 * Set the associated session context. The container calls this method 
	 * after the instance creation.
	 * 
	 * The enterprise bean instance should store the reference to the context 
	 * object in an instance variable.
	 * 
	 * This method is called with no transaction context. 
	 * 
	 * @throws EJBException Thrown if method fails due to system-level error.
	 */
	public void setSessionContext(SessionContext newContext)
		throws EJBException {
		System.out.println(" set session context ");
		context = newContext;
	}

	public String sayHello() throws RemoteException{
		return "Welcome to EJB2.0,HXL";
	}
}

2.TreadeBeanHome.java 程序如下:

import java.rmi.RemoteException;

import javax.ejb.CreateException;
import javax.ejb.EJBHome;

public interface TreadeBeanHome extends EJBHome {
	 TreadeBeanRemote create() throws RemoteException,CreateException;
}

3.TreadeBeanRemote.java 程序如下:

import java.rmi.RemoteException;

import javax.ejb.EJBObject;

public interface TreadeBeanRemote extends EJBObject {
	String sayHello() throws RemoteException;
}