當前位置：首頁 > 编程资源 > 编程问答 >内容正文

编程问答

Session机制二（简易购物车案例）

發布時間：2025/5/22 编程问答 24 豆豆

生活随笔收集整理的這篇文章主要介紹了 Session机制二（简易购物车案例）小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

一：案例一（簡易購物車）

1.目錄結構

2.step1.jsp

3.ProcessStep1Servlet.java

1 package javaweb; 2 3 import java.io.IOException; 4 import javax.servlet.ServletException; 5 import javax.servlet.annotation.WebServlet; 6 import javax.servlet.http.HttpServlet; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 /** 11 * Servlet implementation class ProcessStep1Servlet 12 */ 13 @WebServlet("/processStep1") 14 public class ProcessStep1Servlet extends HttpServlet { 15 private static final long serialVersionUID = 1L; 16 17 /** 18 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 19 */ 20 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 21 //獲取選中的圖書的信息 22 String[] books=request.getParameterValues("book"); 23 24 //將圖書放進HttpSession中 25 request.getSession().setAttribute("books", books); 26 27 //重定向頁面到shopcart/step2.jsp 28 //這里使用的絕對路徑，同理，在jsp里也需要使用相對路徑 29 response.sendRedirect(request.getContextPath()+"/shopCart/step2.jsp"); 30 } 31 32 }

4.step2.jsp

1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <h2>Step2:請輸入信用卡的信息</h2> 11 <form action="<%=request.getContextPath()%>/processStep2" method="post"> 12 <table border="1" cellpadding="10" cellspacing="0"> 13 <tr> 14 <td colspan="2">寄送信息</td> 15 </tr> 16 <tr> 17 <td>姓名</td> 18 <td><input type="text" name="name" /></td> 19 </tr> 20 <tr> 21 <td>地址</td> 22 <td><input type="text" name="address" /></td> 23 </tr> 24 <tr> 25 <td colspan="2">信用卡信息</td> 26 </tr> 27 <tr> 28 <td>種類</td> 29 <td><input type="radio" name="cardType" value="Visa" />Visa <input 30 type="radio" name="cardType" value="Master" />Master</td> 31 </tr> 32 <tr> 33 <td>卡號</td> 34 <td><input type="text" name="cardNum" /></td> 35 </tr> 36 <tr> 37 <td colspan="2"><input type="submit" value="Submit" /></td> 38 </tr> 39 </table> 40 </form> 41 </body> 42 </html><%@ page language="java" contentType="text/html; charset=utf-8" 43 pageEncoding="utf-8"%> 44 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 45 <html> 46 <head> 47 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 48 <title>Insert title here</title> 49 </head> 50 <body> 51 <h2>Step2:請輸入信用卡的信息</h2> 52 <form action="<%=request.getContextPath()%>/processStep2" method="post"> 53 <table border="1" cellpadding="10" cellspacing="0"> 54 <tr> 55 <td colspan="2">寄送信息</td> 56 </tr> 57 <tr> 58 <td>姓名</td> 59 <td><input type="text" name="name" /></td> 60 </tr> 61 <tr> 62 <td>地址</td> 63 <td><input type="text" name="address" /></td> 64 </tr> 65 <tr> 66 <td colspan="2">信用卡信息</td> 67 </tr> 68 <tr> 69 <td>種類</td> 70 <td><input type="radio" name="cardType" value="Visa" />Visa <input 71 type="radio" name="cardType" value="Master" />Master</td> 72 </tr> 73 <tr> 74 <td>卡號</td> 75 <td><input type="text" name="cardNum" /></td> 76 </tr> 77 <tr> 78 <td colspan="2"><input type="submit" value="Submit" /></td> 79 </tr> 80 </table> 81 </form> 82 </body> 83 </html>

5.ProcessStep2Servlet.java

1 package javaweb; 2 3 import java.io.IOException; 4 import javax.servlet.ServletException; 5 import javax.servlet.annotation.WebServlet; 6 import javax.servlet.http.HttpServlet; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 /** 11 * Servlet implementation class ProcessStep2Servlet 12 */ 13 @WebServlet("/processStep2") 14 public class ProcessStep2Servlet extends HttpServlet { 15 private static final long serialVersionUID = 1L; 16 17 /** 18 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 19 */ 20 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 21 //獲取請求參數name address cardType cardNum 22 String name=request.getParameter("name"); 23 String address=request.getParameter("address"); 24 String cardType=request.getParameter("cardType"); 25 String cardNum=request.getParameter("cardNum"); 26 27 //將參入放進一個對象中 28 Customer customer=new Customer(name, address, cardType, cardNum); 29 30 //將請求信息存入HtppSession中 31 request.getSession().setAttribute("customer", customer); 32 33 //重定向到confirm.jsp 34 response.sendRedirect(request.getContextPath()+"/shopCart/confirm.jsp"); 35 } 36 37 }

6.conform.jsp

1 <%@page import="javaweb.Customer"%> 2 <%@ page language="java" contentType="text/html; charset=utf-8" 3 pageEncoding="utf-8"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 8 <title>Insert title here</title> 9 </head> 10 <body> 11 <% 12 Customer customer=(Customer)session.getAttribute("customer"); 13 String[] books=(String[])session.getAttribute("books"); 14 %> 15 <h2>Step3:請確認</h2> 16 <table> 17 <tr> 18 <td>顧客姓名</td> 19 <td><%=customer.getName() %></td> 20 </tr> 21 <tr> 22 <td>顧客地址</td> 23 <td><%=customer.getAddress() %></td> 24 </tr> 25 <tr> 26 <td>顧客卡號</td> 27 <td><%=customer.getCardNum() %></td> 28 </tr> 29 <tr> 30 <td>顧客類型</td> 31 <td><%=customer.getCardType() %></td> 32 </tr> 33 <tr> 34 <td>Books</td> 35 <td> 36 <% 37 for(String book:books){ 38 out.print(book); 39 out.print("<br>"); 40 } 41 %> 42 </td> 43 </tr> 44 </table> 45 </body> 46 </html>

7.補充簡單bean，Customer.java

1 package javaweb; 2 3 public class Customer { 4 private String name; 5 private String address; 6 private String cardType; 7 private String cardNum; 8 public Customer() { 9 10 } 11 public Customer(String name, String address, String cardType, String cardNum) { 12 super(); 13 this.name = name; 14 this.address = address; 15 this.cardType = cardType; 16 this.cardNum = cardNum; 17 } 18 public String getName() { 19 return name; 20 } 21 public void setName(String name) { 22 this.name = name; 23 } 24 public String getAddress() { 25 return address; 26 } 27 public void setAddress(String address) { 28 this.address = address; 29 } 30 public String getCardType() { 31 return cardType; 32 } 33 public void setCardType(String cardType) { 34 this.cardType = cardType; 35 } 36 public String getCardNum() { 37 return cardNum; 38 } 39 public void setCardNum(String cardNum) { 40 this.cardNum = cardNum; 41 } 42 43 }

8.展示結果

二：

轉載于:https://www.cnblogs.com/juncaoit/p/7471833.html

總結

以上是生活随笔為你收集整理的Session机制二（简易购物车案例）的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。

上一篇： Angular 2+ 监听路由变化动态设
下一篇： c++中ifstream一次读取整个文件