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 1. 简易session版购物车:创建一个简单的购物车模型，由三个 jsp 和两个 Servlet 组成：

 

 

 

 

checkbox 是一组的话 name必须一致

代码：

 

　　1）step-1.jsp

 

1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2     pageEncoding="UTF-8"%> 3  4  5  6 
      7  8  9 10     
Step1:选择要购买的图书
11     12     
     
      13         
      
       14             
         15                 
16                 
17             
18             19             
         20                 
21                 
22             
23             24             
         25                 
26                 
27             
28         29             
         30                 
31                 
32             
33 34             
         35                 
38                 39             
40         41         42         
       
        
         
书名
         
购买
        
        
         
Java
         
        
        
         
Oracle
         
        
        
         
Struts
         
        
        
         
36                     37                 
        
       
      
43     
     
44 45 46 

 

　　　　　　　　

 

　　2）step-2.jsp

 

1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2     pageEncoding="UTF-8"%> 3  4  5  6 
      7  8  9 10     
     
      11     
      
step2: 请输入寄送的地址和信用卡信息
12     
      
       13         
         14             
15         
16         17         
         18             
19             
20         
21         22         
         23             
24             
25         
26         27         
         28             
29         
30         31         
         32             
33             
38         
39         40         
         41             
42             
43         
44         45         
         46             
48         
49 
       
        
         
寄送信息
        
        
         
姓名：
         
        
        
         
寄送地址：
         
        
        
         
信用卡信息
        
        
         
种类：
         
34                 Visa35                 Master 36             37             
        
        
         
卡号：
         
        
        
         
47             
        
       
      
50     
     
51 52 

 

　　　　　　

　　3）confim.jsp

 

1 <%@page import="com.jason.shoopingcart.bean.Customer"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3     pageEncoding="UTF-8"%> 4  5  6  7 
      8  9 10 11 12     <%13         Customer customer = (Customer)session.getAttribute("customer");14         String[] books = (String[])session.getAttribute("books");15     %>16     
     
      17         
        18             
19             
20         
21         22         
        23             
24             
25         
26         
        27             
28             
29         
30         
        31             
32             
33         
34         
        35             
36             
44         
45     
      
       
        
顾客姓名：
        
<%= customer.getName() %>
       
       
        
地址：
        
<%= customer.getAddress() %>
       
       
        
卡号：
        
<%= customer.getCard()%>
       
       
        
卡的类型：
        
<%= customer.getCardType()%>
       
       
        
买的书：
        
37                 <%38                     for(String book : books ){39                         out.print(book);40                         out.print("
");41                     }42                 %>43             
       
      
     
46 47 48 

 

　　

　　4）ProcessStep1Servlet.java

 

1  1 package com.jason.shoopingcart.servlet; 2  2  3  3 import java.io.IOException; 4  4 import javax.servlet.ServletException; 5  5 import javax.servlet.annotation.WebServlet; 6  6 import javax.servlet.http.HttpServlet; 7  7 import javax.servlet.http.HttpServletRequest; 8  8 import javax.servlet.http.HttpServletResponse; 9  9 10 10 /**11 11  * Servlet implementation class ProcessStep1Servlet12 12  */13 13 @WebServlet("/processStep1")14 14 public class ProcessStep1Servlet extends HttpServlet {15 15     private static final long serialVersionUID = 1L;16 16 17 17     18 18     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {19 19 20 20         //1.获取选中的图书的信息21 21         String[] books = request.getParameterValues("book");22 22         23 23         //2.把图书信息放入到HttpSession 中24 24         request.getSession().setAttribute("books", books);25 25         26 26         //3.重定向到shoppingcart/step-2.jsp27 27         response.sendRedirect(request.getContextPath() + "/shoppingcart/step-2.jsp");28 28         29 29     }30 30 31 31 }

 

 

　　

　　5）ProcessStep2Servlet.java

1 1 package com.jason.shoopingcart.servlet; 2  2  3  3 import java.io.IOException; 4  4  5  5 import javax.servlet.ServletException; 6  6 import javax.servlet.annotation.WebServlet; 7  7 import javax.servlet.http.HttpServlet; 8  8 import javax.servlet.http.HttpServletRequest; 9  9 import javax.servlet.http.HttpServletResponse;10 10 import javax.servlet.http.HttpSession;11 11 12 12 import com.jason.shoopingcart.bean.Customer;13 13 14 14 /**15 15  * Servlet implementation class ProcessStep2Servlet16 16  */17 17 @WebServlet("/processStep2")18 18 public class ProcessStep2Servlet extends HttpServlet {19 19     private static final long serialVersionUID = 1L;20 20 21 21     22 22     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {23 23         //1. 获取请求参数 name ,address ,cardType,card24 24         request.setCharacterEncoding("UTF-8");25 25         String name = request.getParameter("name");26 26         String address = request.getParameter("address");27 27         String cardType = request.getParameter("cardType");28 28         String card = request.getParameter("card");29 29         30 30         Customer customer = new Customer(name, address, cardType, card);31 31         32 32         //2.把请求存储到Httpsession中33 33          HttpSession  session = request.getSession();34 34          session.setAttribute("customer", customer);35 35         36 36         //3.重定向到confirm.jsp37 37          response.sendRedirect(request.getContextPath() + "/shoppingcart/confirm.jsp");38 38     }39 39 40 40 }

 

 

　　　

　　6）Customer.java

 

1 package com.jason.shoopingcart.bean; 2  3 public class Customer { 4     private String name; 5     private String address; 6     private String cardType; 7     private String card; 8  9     public String getName() {10         return name;11     }12 13     public void setName(String name) {14         this.name = name;15     }16 17     public String getAddress() {18         return address;19     }20 21     public void setAddress(String address) {22         this.address = address;23     }24 25     public String getCardType() {26         return cardType;27     }28 29     public void setCardType(String cardType) {30         this.cardType = cardType;31     }32 33     public void setCard(String card) {34         this.card = card;35     }36     public String getCard() {37         return card;38     }39     40     41 42     public Customer(String name, String address, String cardType, String card) {43         super();44         this.name = name;45         this.address = address;46         this.cardType = cardType;47         this.card = card;48     }49 50     public Customer() {51         super();52     }53 54 }