day05_2.txt

网络购物系统开发详细步骤

======================产品管理=====================

1，创建ProductDTO 
   
   package    : dto
   class name : ProudctDTO


package dto;
import java.io.Serializable;

public class ProductDTO implements Serializable{
  private String productId;
  private String name;
  private double  basePrice;
  private String desc;
  private CategoryDTO category = null;

  public ProductDTO(String id,String name,
         double basePrice,String desc,
         CategoryDTO category) {
    productId = id;
    this.name = name;
    this.basePrice = basePrice;
    this.desc = desc;
    this.category = category;
  }

  public String getProductId(){
    return this.productId;
  }
  public void setProductId( String name ){
    this.name = name;
  }

  public String getName(){
    return this.name;
  }
  public void setName( String name ){
    this.name = name;
  }

  public double getBasePrice(){
    return this.basePrice;
  }
  public void setBasePrice( double basePrice ){
    this.basePrice = basePrice;
  }

  public String getDesc(){
    return this.desc;
  }
  public void setDesc( String desc ){
    this.desc = desc;
  }

  public CategoryDTO getCategory(){
    return this.category;
  }
  public void setCategory( CategoryDTO category ){
    this.category = category;
  }

}

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

2, 为ProductEJB添加find方法：

   右键点击ProductEJB ---> add ---> finder

   Finder Name     : findAll
   return type     : java.util.Collection
   input parameter : 
   home interface  : Local Home
   query           : select object( p ) from Product p

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

3, 为ProductMgmSessionFacadeEJB添加商业方法：

   method name     : getAllProduct
   return type     : java.util.Collection
   input parameter : 
   interface       : Local 

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

4, 编辑getAllProduct方法
   右键点击ProductMgmSessionFacadeEJB ---> view bean source

   public java.util.Collection getAllProduct()
                 throws FinderException {
    
    Collection col = productHome.findAll();
    HashSet set = new HashSet();
    Iterator i = col.iterator();
    while( i.hasNext() ){
      ProductLocal local = (ProductLocal)i.next();
      CategoryLocal cLocal = local.getCategory();
      CategoryDTO category = new CategoryDTO(
                  cLocal.getCategoryid(),
                  cLocal.getName(),
                  cLocal.getDescription());

      set.add( new ProductDTO(
                   local.getProductid(),
                   local.getName(),
                   local.getBaseprice(),
                   local.getDescription(),
                   category
          ));
    }
    return set;
  }

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

5, 修改 ProductMgmSessionFacadeLocal , 使其 getAllProduct
   方法的声明与 ProductMgmSessionFacadeBean中的一致
   ( 如下所示 )


  public java.util.Collection getAllProduct() 
           throws  FinderException;
  

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

6, 为 ProductMgmDelegate 类添加方法 getAllProduct()

  public Collection getAllProduct( )
                             throws FinderException{

    return sessionLocal.getAllProduct();
  }

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


7,为 ProductMgmSessionFacadeEJB 添加 addProduct 方法
  右键点击 ProductMgmSessionFacadeEJB ---> add ---> method

  method name     : addProduct
  return type     : void 
  input parameter : dto.ProductDTO product
  interface       : local 

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

8, 为 ProductMgmSessionFacadeEJB 的 addProduct方法提供实现

   右键点击 ProductMgmSessionFacadeEJB --> view bean source
  
   实现addProduct 方法：( 如下所示 )

   public void addProduct(dto.ProductDTO product) 
              throws FinderException, CreateException {
    
    SequenceLocal sLocal = 
              seqHome.findByPrimaryKey( new Integer(1) );

    int seq = sLocal.getSequence();

    CategoryLocal cLocal = categoryHome.findByPrimaryKey(
             product.getCategory().getId() );
    ProductLocal pLocal = productHome.create(
                          ""+seq,
                          product.getName(),
                          product.getDesc(),
                          product.getBasePrice());

   pLocal.setCategory( cLocal );
  }

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

9，修改 ProductMgmSessionFacadeLocal 中的 addProduct 方法声
   明，使之同 ProductMgmSessionFacadeBean 中的声明一致：
   ( 如下所示 )


  public void addProduct(ProductDTO product) 
           throws FinderException, CreateException;


==========================================================
10, 为ProductMgmDelegate 添加商业方法 addProduct() ( 如下所示 )

  public void addProduct( ProductDTO product )
            throws FinderException,CreateException{
    sessionLocal.addProduct( product );
  }

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

    *****以下操作为产品管理提供web 应用 ( struts )****

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

11, 为 advinceMgm.jsp 中的连接 productMgm.do 创建Action

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

    package : ec_port_web
    Action  : ProductMgmAction
    ---> next
    Action Path  : /prductMgm
    BeanForm name:
    scope        :
    validate     :
    input jsp    : 
    ---> finish
==========================================================

12,修改perform方法，查询所有的产品和类别，将得到的集合设置到
   request Attribute中 ，转向 productMgm.jsp页面：

package ec_port_web;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import exceptions.*;
import javax.ejb.FinderException;
import javax.ejb.CreateException;
import dto.CategoryDTO;
import dto.ProductDTO;
import delegates.ProductMgmDelegate;
import java.util.Collection;

public class ProductMgmAction extends Action {
  public ActionForward perform(
        ActionMapping actionMapping, 
        ActionForm actionForm, 
        HttpServletRequest request,         HttpServletResponse response) {
    try{
      ProductMgmDelegate pd = new ProductMgmDelegate();
      Collection categoryCol = pd.getAllCategory();
      Collection productCol = pd.getAllProduct();
      request.getSession().
	setAttribute( "ALL_CATEGORY" , categoryCol);
      request.getSession().
           setAttribute( "ALL_PRODUCT" , productCol);
      return actionMapping.findForward( "success" );
    }catch( ServiceLocatorException se ){
      se.printStackTrace();
      return actionMapping.findForward( "systemError" );
    }
     catch( FinderException fe ){
       fe.printStackTrace();
       return actionMapping.findForward( "systemError" );
    }
     catch( CreateException ce ){
       ce.printStackTrace();
       return actionMapping.findForward( "systemError" );
    }
  }
}

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

13，为 ProductMgmAction 添加forward

   a) when query products and category success
      path  : /productMgm.jsp
      name  ：success

   b) when some exceptions be caught
      path  : /fail.jsp
      name  : systemError

==========================================================
14, 创建productMgm.jsp

<%@ page contentType="text/html; charset=GBK" %>
<%@ page import = "java.util.*"%>
<%@ page import = "dto.*"%>
<html>
<head>
<title>
productMgm
</title>
</head>
<%
   Collection productCol =
      (Collection)session.getAttribute( "ALL_PRODUCT" );
   Collection categoryCol =
     (Collection)session.getAttribute( "ALL_CATEGORY" );
%>
<body bgcolor="#ffffff">

<p align="center">
<table width="600" border="0" cellspacing="1" 
      cellpadding="4" bgcolor="3399ff">
   <tr>
       <td colspan="3" align="center">
           <font color="#ffffff" class="title">
           产品管理</font>
       </td>
    </tr>
    <tr>
      <td bgcolor="#ececec">类别:</td>

<form action="searchProduct.do" method="post">
      <td bgcolor="#ececec" colspan="3">
          <select name="category">
	  <option value="all" selected>ALL</option>
<%
	  Iterator i = categoryCol.iterator();
	  while( i.hasNext() ){
	 	CategoryDTO category = 
                        (CategoryDTO)i.next();
%>
		<option value='<%=category.getId()%>'>
			<%=category.getName()%>
		</option>
<%
	  }
%>
          </select>
      </td>
      <td bgcolor="#ececec">
         <input type="submit" name="search" alue="search">
      </td>
   </tr>
</form>


<%
	if( productCol.size() == 0 ){
%>
<tr>
    <td bgcolor="#ececec">
	<tr><td bgcolor="#ececec" colspan="5">
          目前没有任何产品</td></tr>
</td></tr></table>
<%
	}
	else{
        	Iterator iter = productCol.iterator();
%>

<%
		while( iter.hasNext() ){
			ProductDTO p = 
                           (ProductDTO)iter.next();
%>
<form action="delModProduct.do" method="post">

    <tr>
       <td bgcolor="#ececec" ><%=p.getName()%></td>
       <td bgcolor="#ececec">         <%=p.getCategory().getName()%></td>
       <td bgcolor="#ececec" ><%=p.getBasePrice()%></td>
       <td bgcolor="#ececec" >
          <input type="submit" name="modify"
                 value="modify">
       </td>
       <td bgcolor="#ececec" >
	    <input type="submit" name="delete"                    value="delete">
       </td>