day10.txt

网络购物系统开发详细步骤

1,在dto表中创建PaywayDTO

package dto;
import java.io.Serializable;

public class PaywayDTO implements Serializable{

  private Integer paywayId;
  private String payStyle;
  public PaywayDTO() {
  }
  public PaywayDTO( Integer paywayId,String payStyle){
    this.paywayId = paywayId;
    this.payStyle = payStyle;
  }

  public PaywayDTO( int paywayId,String payStyle){
    Integer temp = new Integer( paywayId );
    this.paywayId = temp;
    this.payStyle = payStyle;
  }

  public Integer getPaywayId(){
    return this.paywayId;
  }
  public void setPaywayId( Integer id ){
    this.paywayId = id;
  }

  public String getPayStyle(){
    return this.payStyle;
  }
  public void setPayStyle( String style ){
    this.payStyle = style;
  }

}

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2,在dto包中创建OrderDTO

package dto;
import ejbs.ShoppingCartLocal;
import java.util.Collection;
import java.io.Serializable;

public class OrderDTO implements Serializable{

  private Collection items;
  private String cardNo;
  private String userid;
  private PaywayDTO payway;
  private double cost;

  public OrderDTO() {
  }

  public OrderDTO( Collection items,PaywayDTO ayway,
           String cardNo,String userid,double cost){
    this.items = items;
    this.payway = payway;
    this.cardNo = cardNo;
    this.userid = userid;
    this.cost = cost;
  }

  public Collection getItems(){
    return this.items;
  }
  public void setItems( Collection items ){
    this.items = items;
  }

  public PaywayDTO getPayway(){
    return this.payway;
  }
  public void setPayway( PaywayDTO payway ){
    this.payway = payway;
  }

  public String getCardNo(){
    return this.cardNo;
  }
  public void setCardNo( String cardNo ){
    this.cardNo = cardNo;
  }

  public String getUserid(){
    return this.userid;
  }
  public void setUserid( String userid ){
    this.userid = userid;
  }

  public double getCost(){
    return this.cost;
  }
  public void setCost( double cost ){
    this.cost = cost;
  }

}
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3,为PaywayEJB添加商业方法，
  双击ejb-module --> 右键点击 PaywayEJB --> add --> finder

  finder name      : findAll
  return type      : java.util.Collection
  home interface   : local home
  query            : select object( p ) from Payway p

=========================================================
4, 在 ShoppingSessionFacadeEJB 中添加方法 
   右键点击ShoppingSessionFacade --> add --> method

   mehtod name     : getAllPayway
   return type     : java.util.Collection
   input parameter : 
   interface       : local

=========================================================

5, 右键点击ShoppingSessionFacade --> view bean source
   为 getAllPayway 添加函数体

  public java.util.Collection getAllPayway() 
                                 throws OrderException{
    HashSet set = new HashSet();
    try{
      Collection col = paywayLocalHome.findAll();
      Iterator i = col.iterator();
      PaywayDTO payway = null;
      while( i.hasNext() ){
        PaywayLocal pLocal = (PaywayLocal) i.next();
        payway = new PaywayDTO(
                     pLocal.getPaywayid(),
                     pLocal.getPaystyle());
        set.add( payway );
      }
      return set;
    }catch( FinderException fe ){
      fe.printStackTrace();
      throw new OrderException( fe.getMessage() );
    }
  }

=========================================================

5，修改ShoppingSessionFacadeLocal , 使其中的函数声明与bean class 中的一致：

package ejbs;

import javax.ejb.*;
import java.util.*;
import exceptions.OrderException;

public interface ShoppingSessionFacadeLocal 
                extends javax.ejb.EJBLocalObject {
  public void addOrder(double cost, String no, 
                       String uid, String payway, 
                       Collection lines) 
           throws OrderException;

  public java.util.Collection getAllPayway() 
           throws OrderException;
}

=========================================================

6，在web.xml中配置对ShoppingSessionFacade的引用

==========================================================

7，在delegates包中创建ShoppingDelegate类：

package delegates;
import ejbs.ShoppingSessionFacadeLocalHome;
import ejbs.ShoppingSessionFacadeLocal;
import util.ServiceLocator;
import exceptions.ServiceLocatorException;
import exceptions.OrderException;
import javax.ejb.CreateException;
import java.util.Collection;

public class ShoppingDelegate {
  private ShoppingSessionFacadeLocal sessionLocal = null;

  public ShoppingDelegate() 
             throws ServiceLocatorException{
    try{
      ServiceLocator locator =                      ServiceLocator.getInstance();
      ShoppingSessionFacadeLocalHome home =               (ShoppingSessionFacadeLocalHome)
        locator.getEJBLocalHome(
              "java:comp/env/ejb/shoppingSessionFacade");
      sessionLocal = home.create();
    }catch( CreateException ce ){
      ce.printStackTrace();
      throw new ServiceLocatorException( 
             ce.getMessage());
    }
  }

  public Collection getAllPayway() throws OrderException{
    return sessionLocal.getAllPayway();
  }

}

==========================================================

8,修改index.jsp，在页面上添加 
  <a href="order.do">order</a>

========================================================

9，为order.do 创建Action

   file --> new ---> web --> Action 

   package   : ec_port_web
   Action    : OrderAction
   --> next

   Action Path : /order
   ---> finish

=========================================================

package ec_port_web;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import dto.*;
import exceptions.*;
import java.util.Collection;
import delegates.ShoppingDelegate;
import ejbs.ShoppingCartLocal;
import util.Errors;
import util.User;

public class OrderAction extends Action {
  public ActionForward perform(
             ActionMapping actionMapping, 
             ActionForm actionForm, 
             HttpServletRequest request,
   
    try{

        ShoppingDelegate sd = new ShoppingDelegate();
        Collection col = sd.getAllPayway();
        request.setAttribute( "ALL_PAYWAY",col );
        return actionMapping.findForward("success");

      }catch( ServiceLocatorException se ){
        se.printStackTrace();
        return actionMapping.findForward( "error" );
      }
       catch( OrderException oe ){
         oe.printStackTrace();
         return actionMapping.findForward( "error" );
       }
  }
}

==========================================================

10, 为 OrderAction 配置 forwarde

   a) when user have login yet and 
      shopping cart is not empty
      path : /order.jsp
      name : success

   c) when some exceptions be caught
     path : /fail.jsp
     name : error

==========================================================

11,创建 order.jsp

<%@ page contentType="text/html; charset=GBK" %>
<%@page import="java.util.*,dto.*"%>
<%
   Collection col = 
        (Collection)request.getAttribute( "ALL_PAYWAY" );
%>
<html>
<head>