cmddisplaylocation.java

一个简单的EJB实例.用DB2连接.JSP页面.很好用.供大家学习

package com.xyz.command;

import java.io.IOException;

import javax.ejb.EJBException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.xyz.data.LocationVO;
import com.xyz.ejb.SalesFacade;
import com.xyz.ejb.SalesFacadeHome;

/**
 * @author Mauget
 */
public class CmdDisplayLocation implements ICommand {

	/**
	 * @see com.xyz.command.ICommand#execute(HttpServletRequest, HttpServletResponse)
	 */
	public String execute(
		HttpServletRequest request,
		HttpServletResponse response)
		throws ServletException, IOException {

		try {
			Context jndiContext = new InitialContext();

			Object ref = jndiContext.lookup(facRef);
			SalesFacadeHome home =
				(SalesFacadeHome) PortableRemoteObject.narrow(
					ref,
					SalesFacadeHome.class);

			SalesFacade facade = home.create();
			String zipCode = request.getParameter("zipcode");
			if (zipCode != null) {
				LocationVO locationDO = facade.getLocation(zipCode);
				request.setAttribute("location", locationDO);
				response.addCookie(new Cookie(cookieName, zipCode));
			}
		} catch (javax.naming.NamingException ex) {
			throw new EJBException();
		} catch (java.rmi.RemoteException ex) {
			throw new EJBException();
		} catch (javax.ejb.CreateException ex) {
			throw new EJBException();
		}
		return "DisplayLocation.jsp";
	}

}