Login Servlet.java
package net.ys.shop.servlet;
/**
* 功能:登录处理类
* 作者:袁颂
* 日期:2019年12月5日
*/
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.User;
import net.ys.shop.Service.UserService;
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
// 获取会话对象
HttpSession session = request.getSession();
// 获取用户名
String username = request.getParameter("username");
// 获取密码
String password = request.getParameter("password");
// 定义用户服务对象
UserService userService = new UserService();
// 执行登录方法,返回用户实体
User user = userService.login(username, password);
// 判断用户登录是否成功
if (user != null) {
// 设置session属性
session.setMaxInactiveInterval(5 * 60);
session.setAttribute("username", username);
session.removeAttribute("loginMsg");
// 根据用户权限跳转到不同页面
if (user.getPopedom() == 0) {
System.out.println("用户登录成功,进入后台!");
response.sendRedirect(request.getContextPath() + "/backend/management.jsp");
} else if (user.getPopedom() == 1) {
System.out.println("用户登录成功,进入前台显示类别!");
response.sendRedirect(request.getContextPath() + "/showCategory");
}
} else
System.out.println("用户名或密码错误,用户登录失败!");
// 设置session属性
session.setAttribute("loginMsg", "用户名或密码错误!");
response.sendRedirect(request.getContextPath() + "/login.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
登录成功但跳转不到management.jsp页面,下来还需要查找一下资料
用户名或者密码错误则登录失败,再控制台显示测试信息
LogoutServlet.java
package net.ys.shop.servlet;
/**
* 功能:注销处理类
* 作者:袁颂
* 日期:2019年12月5日
*/
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/logout")
public class LogoutServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 让session失效
request.getSession().invalidate();
// 重定向到登录页面
response.sendRedirect(request.getContextPath() + "/login.jsp");
System.out.println("用户注销成功!");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
输入logout后敲回车注销
跳转到登录页面
控制台输出测试信息
RegisterServlet.java
package net.ys.shop.servlet;
/**
* 功能:处理用户注册
* 作者:袁颂
* 日期:2019年12月5日
*/
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.sql.Timestamp;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.User;
import net.ys.shop.Service.UserService;
@WebServlet("/register")
public class RegisterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
// 获取session对象
HttpSession session = request.getSession();
// 获取用户名
String username = request.getParameter("username");
// 获取密码
String password = request.getParameter("password");
// 获取电话号码
String telephone = request.getParameter("telephone");
// 设置注册时间(时间戳对象)
Timestamp registerTime = new Timestamp(System.currentTimeMillis());
// 设置用户为普通用户
int popedom = 1;
// 创建用户对象
User user = new User();
// 设置用户对象信息
user.setUsername(username);
user.setPassword(password);
user.setTelephone(telephone);
user.setRegisterTime(registerTime);
user.setPopedom(popedom);
// 创建UserService对象
UserService userService = new UserService();
// 调用UserService对象的注册方法
int count = userService.addUser(user);
// 判断是否注册成功
if (count > 0) {
// 设置session属性
session.setAttribute("registerMsg", "恭喜,注册成功!");
// 重定向到登录页面
response.sendRedirect(request.getContextPath() + "/login.jsp");
//在控制台输出测试信息
System.out.println("恭喜,注册成功,跳转到登录页面!");
} else {
// 设置session属性
session.setAttribute("registerMsg", "遗憾,注册失败!");
// 重定向到注册页面
response.sendRedirect(request.getContextPath() + "/frontend/register.jsp");
//在控制台输出测试信息
System.out.println("遗憾,注册失败,跳转到注册页面!");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
输入register后再后面写添加的信息,然后敲回车
返回登录页面
再数据库端查看数据是否添加成功
如果注册信息格式不正确,再控制台输出异常,并且提示注册失败,再跳转到注册页面
ShowCategoryServlet.java
package net.ys.shop.servlet;
/**
* 功能:显示类别控制程序
* 作者:袁颂
* 日期:2019年12月9日
*/
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.Category;
import net.ys.shop.Service.CategoryService;
@WebServlet("/showCategory")
public class ShowCategoryServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 创建类别服务对象
CategoryService categoryService = new CategoryService();
// 获取全部商品类别
List<Category> categories = categoryService.findAllCategories();
// 获取session对象
HttpSession session = request.getSession();
// 把商品类别列表以属性的方式保存到session里
session.setAttribute("categories", categories);
// 重定向到显示商品类别页面(showCategory.jsp)
response.sendRedirect(request.getContextPath() + "/frontend/showCategory.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
输入showCategory后敲回车
转跳到showCategory.jsp页面
ShowProductsServlet.java
package net.ys.shop.servlet;
/**
* 功能:显示商品列表的控制程序
* 通过业务层访问后台数据,
* 然后将数据返回给前台页面
* 作者:袁颂
* 日期:2019年12月9日
*/
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.Product;
import net.ys.shop.Service.CategoryService;
import net.ys.shop.Service.ProductService;
@WebServlet("/showProduct")
public class ShowProductServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取类别标识符
int categoryId = Integer.parseInt(request.getParameter("categoryId"));
// 创建商品类别服务对象
CategoryService categoryService = new CategoryService();
// 由类别标识符获取类别名
String categoryName = categoryService.findCategoryById(categoryId).getName();
// 创建商品服务对象
ProductService productService = new ProductService();
// 获取指定商品类别的商品列表
List<Product> products = productService.findProductsByCategoryId(categoryId);
// 获取session对象
HttpSession session = request.getSession();
// 把商品列表对象以属性的方式保存到session里
session.setAttribute("products", products);
// 重定向到显示商品信息页面
response.sendRedirect(request.getContextPath() + "/frontend/showProduct.jsp?categoryName=" + categoryName);
//在服务器端控制台输出测试信息
for (int i =0;i<products.size();i++){
System.out.println(products.get(i));
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
通过categoryid来查找商品,输入showProduct?categoryId=1后敲回车
之后再控制台显示查找到产品信息
ShowCartServlet.java
package net.ys.shop.servlet;
/**
* 功能:显示购物车控制程序
* 作者:袁颂
* 日期:2019年12月14日
*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.Product;
import net.ys.shop.Service.ProductService;
@WebServlet("/showCart")
public class ShowCartServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取商品类别标识符
int categoryId = Integer.parseInt(request.getParameter("categoryId"));
// 获取session对象
HttpSession session = request.getSession();
// 获取购物车
LinkedHashMap<Integer, Integer> cart = (LinkedHashMap<Integer, Integer>) session.getAttribute("cart");
// 判断购物车是否为空
if (cart != null) {
// 定义购物表
List<HashMap<String, Object>> shoppingTable = new ArrayList<HashMap<String, Object>>();
// 创建商品服务对象
ProductService productService = new ProductService();
// 购物总金额
double totalPrice = 0.0;
// 遍历购物车
for (Integer id : cart.keySet()) {
// 获取商品对象
Product product = productService.findProductById(id);
// 生成购物表记录
HashMap<String, Object> shoppingItem = new HashMap<String, Object>();
shoppingItem.put("id", product.getId());
shoppingItem.put("name", product.getName());
shoppingItem.put("price", product.getPrice());
shoppingItem.put("amount", cart.get(id));
shoppingItem.put("sum", product.getPrice() * cart.get(id));
// 将购物表记录添加到购物表中
shoppingTable.add(shoppingItem);
// 累加购买总金额
totalPrice = totalPrice + (Double) shoppingItem.get("sum");
}
// 将购物表和购买总金额保存到session里
session.setAttribute("shoppingTable", shoppingTable);
session.setAttribute("totalPrice", totalPrice);
// 重定向到显示商品控制程序
response.sendRedirect(request.getContextPath() + "/showProduct?categoryId=" + categoryId);
} else {
System.out.println("购物车里没有类别号为[" + categoryId + "]的商品!");
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
输入showCart?categoryId=1后敲击回车
随后页面跳到了一个空白页面
控制台输出了查找购物车的记录
操作购物车处理类
OperateCartServlet.java
package net.ys.shop.servlet;
/**
* 功能:操作购物车控制程序
* 作者:袁颂
* 日期:2019年12月14日
*/
import java.io.IOException;
import java.util.LinkedHashMap;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.ys.shop.Service.ProductService;
@WebServlet("/operateCart")
public class OperateCartServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获取商品标识符
int id = Integer.parseInt(request.getParameter("id"));
// 获取商品操作
String operation = request.getParameter("operation");
// 从session里获取购物车(键:商品标识符;值:购买数量)
LinkedHashMap<Integer, Integer> cart = (LinkedHashMap<Integer, Integer>) request.getSession()
.getAttribute("cart");
// 判断购物车是否为空
if (cart == null) {
// 创建购物车
cart = new LinkedHashMap<Integer, Integer>();
// 将购物车保存到session里,便于用户在不同页面访问购物车
request.getSession().setAttribute("cart", cart);
}
if (operation.equals("add")) {
// 将商品添加到购物车
if (cart.containsKey(id)) { // 该商品已购买过
// 购买数量增加1
cart.put(id, cart.get(id) + 1);
} else { // 该商品未曾购买
// 购买数量设置为1
cart.put(id, 1);
}
} else if (operation.equals("delete")){
// 将商品从购物车删除
if (cart.get(id) > 1) {
// 购买数量减少1
cart.put(id, cart.get(id) - 1);
} else {
// 从购物车里删除该商品
cart.remove(id);
}
}
// 创建商品服务对象
ProductService productService = new ProductService();
// 获取该商品类别标识符
int categoryId = productService.findProductById(id).getCategoryId();
// 重定向到显示购物车控制程序
response.sendRedirect(request.getContextPath() + "/showCart?categoryId=" + categoryId);
}
}
生成订单处理类
MakeOrderServlet.java
package net.ys.shop.servlet;
/**
* 功能:生成订单控制程序
* 作者:袁颂
* 日期:2019年12月14日
*/
import java.io.IOException;
import java.sql.Timestamp;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.Order;
import net.ys.shop.bean.User;
import net.ys.shop.Service.OrderService;
import net.ys.shop.Service.UserService;
import net.ys.shop.Service.OrderService;
import net.ys.shop.Service.UserService;
@WebServlet("/makeOrder")
public class MakeOrderServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
// 获取表单提交数据
String username = request.getParameter("username");
String telephone = request.getParameter("telephone");
Double totalPrice = Double.parseDouble(request.getParameter("totalPrice"));
String deliveryAddress = request.getParameter("deliveryAddress");
// 创建订单对象
Order order = new Order();
// 设置订单属性
order.setUsername(username);
order.setTotalPrice(totalPrice);
order.setTelephone(telephone);
order.setDeliveryAddress(deliveryAddress);
order.setOrderTime((Timestamp) new Date());
// 创建订单服务
OrderService orderService = new OrderService();
// 添加订单
orderService.addOrder(order);
// 获取最后一个订单
Order lastOrder = orderService.findLastOrder();
// 保存到session里
request.getSession().setAttribute("lastOrder", lastOrder);
// 重定向到显示订单页面
response.sendRedirect(request.getContextPath() + "/frontend/showOrder.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
支付处理类
PayServlet.java
package net.ys.shop.servlet;
/**
* 功能:支付处理程序
* 作者:袁颂
* 日期:2019年12月14日
*/
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/pay")
public class PayServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置请求对象的字符编码
request.setCharacterEncoding("utf-8");
///////////////////////
// 待做部分
// 设置session失效
request.getSession().invalidate();
// 重定向到登录页面
response.sendRedirect(request.getContextPath() + "/login.jsp");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
显示用户处理类
ShowUserServlet.java
package net.ys.shop.servlet;
/**
* 功能:显示用户控制程序
* 作者:袁颂
* 日期:2019年12月14日
*/
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.ys.shop.bean.User;
import net.ys.shop.Service.UserService;
@WebServlet("/showUser")
public class ShowUserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 创建用户服务对象
UserService userService = new UserService();
// 获取全部用户
List<User> users = userService.findAllUsers();
// 获取session对象
HttpSession session = request.getSession();
// 把用户列表以属性的方式保存到session里
session.setAttribute("users", users);
// 重定向到显示用户页面(showUser.jsp)
response.sendRedirect(request.getContextPath() + "/backend/showUser.jsp");
// 在控制台输出所有用户信息
for (User user : users) {
System.out.println(user);
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
之后运行服务器,在网址后面输入showUser敲击回车
之后会返回showUser.jsp页面,目前showUser页面还没有写,所以暂时是404报错
但是在控制台已经输出了所有用户的信息
准备图片资源
创建子包css,在里面新建一个main.css文件
main.css
/* 样式 */
body {
margin: 0px;
text-align: center;
background: url("../images/frontBack.jpg") no-repeat;
background-size: 100%
}
table {
margin: 0 auto;
font-size: 14px;
color: #333333;
border-width: 1px;
border-color: khaki;
border-collapse: collapse;
}
table th {
border-width: 1px;
padding: 8px;
border-style: solid;
border-color: gainsboro;
background-color: honeydew;
}
table td {
border-width: 1px;
padding: 8px;
border-style: solid;
border-color: gainsboro;
background-color: #ffffff;
}
/*登录页面样式*/
.login {
width: 400px;
height: 340px;
background-color: honeydew;
border: solid 2px darkgrey;
left: 50%;
top: 50%;
position: absolute;
margin: -170px 0 0 -200px;
}
.login .websiteTitle, .title {
border: solid 1px floralwhite;
}
/*注册页面样式*/
.register {
width: 400px;
height: 350px;
background-color: honeydew;
border: solid 2px darkgrey;
left: 50%;
top: 50%;
position: absolute;
margin: -175px 0 0 -200px;
}
/*显示类别页面样式*/
.showCategory {
width: 400px;
height: 350px;
background-color: honeydew;
border: solid 2px darkgrey;
left: 50%;
top: 50%;
position: absolute;
margin: -150px 0 0 -200px;
}
/*生成订单页面样式*/
.makeOrder {
width: 400px;
height: 400px;
background-color: honeydew;
border: solid 2px darkgrey;
left: 50%;
top: 50%;
position: absolute;
margin: -200px 0 0 -200px;
}
/*显示订单页面样式*/
.showOrder {
width: 400px;
height: 400px;
background-color: honeydew;
border: solid 2px darkgrey;
left: 50%;
top: 50%;
position: absolute;
margin: -200px 0 0 -200px;
}
在web里建子包JavaScript,在包里建一个check.js文件
check.js
/**
* 检验登录表单
*
* @returns {Boolean}
*/
function checkLoginForm() {
var username = document.getElementById("username");
var password = document.getElementById("password");
if (username.value == "") {
alert("用户名不能为空!");
username.focus();
return false;
}
if (password.value == "") {
alert("密码不能为空!");
password.focus();
return false;
}
return true;
}
/**
* 检验注册表单
*
* @returns {Boolean}
*/
function checkRegisterForm() {
var username = document.getElementById("username");
var password = document.getElementById("password");
var telephone = document.getElementById("telephone");
if (username.value == "") {
alert("用户名不能为空!");
username.focus();
return false;
}
if (password.value == "") {
alert("密码不能为空!");
password.focus();
return false;
}
var pattern = "/^(13[0-9]|14[0-9]|15[0-9]|18[0-9])\d{8}$/";
if (!pattern.exec(telephone)) {
alert("非法手机号!");
telephone.focus();
return false;
}
return true;
}
添加jstl的jar包
设计登录页面login.jsp
用户登录页面
非空校验
帐号密码校验,返回登录页面
在登录过程中,由于不细致把else的花括弧删掉了,导致重定向失败,页面总是报错500,困扰了很久。
修改过后可成功进入后台页面
在frontend里面建register.jsp。
register.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"
value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<!DOCTYPE html>
<html>
<head>
<title>用户注册</title>
<base href="${basePath}">
<link href="css/main.css" rel="stylesheet" type="text/css"/>
<script src="scripts/check.js" type="text/javascript"></script>
</head>
<body>
<div class="register">
<div class="websiteTitle">
<h1>西蒙购物网</h1>
</div>
<div class="title">
<h3>用户注册</h3>
</div>
<div class="main">
<form action="register" method="post">
<table>
<tr>
<td>账号</td>
<td><input id="username" type="text" name="username"/></td>
</tr>
<tr>
<td>密码</td>
<td><input id="password" type="password" name="password"/></td>
</tr>
<tr>
<td align="center">电话</td>
<td><input id="telephone" type="text" name="telephone"/></td>
</tr>
<tr align="center">
<td colspan="2">
<input type="submit" value="注册" onclick="return checkRegisterForm();"/>
<input type="reset" value="重置"/></td>
</tr>
</table>
</form>
</div>
<div class="footer">
<p><a href="login.jsp">切换到登录页面</a></p>
</div>
</div>
<c:if test="${registerMsg!=null}">
<script type="text/javascript">alert("${registerMsg}")</script>
<c:set var="registerMsg" value=""/>
</c:if>
</body>
</html>
点击超链接转跳到注册页面
注册信息的非空校验
输入注册信息
提示注册成功,并返回登录页面
数据库刷新就可以看到新添记录
新建一个showCategory.jsp页面
showCategory.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"
value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<!DOCTYPE html>
<html>
<head>
<title>显示商品类别</title>
<base href="${basePath}">
<link href="css/main.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div class="showCategory">
<div class="websiteTitle">
<h1>西蒙购物网</h1>
</div>
<div>
登录用户:<span style="color: red;">${username}</span>
<c:forEach var="i" begin="1" end="5">
</c:forEach>
<a href="logout">注销</a>
</div>
<div class="title">
<h3>商品类别</h3>
</div>
<div class="main">
<table>
<tr>
<th>类别编号</th>
<th>商品类别</th>
</tr>
<c:forEach var="category" items="${categories}">
<tr align='center'>
<td>${category.id}</td>
<td width="150">
<a href="showProduct?categoryId=${category.id}">${category.name}</a>
</td>
</tr>
</c:forEach>
</table>
</div>
</div>
</body>
</html>
用户登录
登录成功过后显示商品类别
点击注销过后返回登录页面
然后新建一个showCart.jsp,显示购物车的页面
showCart.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"
value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<!DOCTYPE html>
<html>
<head>
<title>显示购物车</title>
<base href="${basePath}">
</head>
<body>
<h3>${username}的购物车</h3>
<table>
<tr>
<th>商品编号</th>
<th>商品名称</th>
<th>销售价格</th>
<th>购买数量</th>
<th>合计金额</th>
<th>用户操作</th>
</tr>
<c:forEach var="shoppingItem" items="${shoppingTable}">
<tr>
<td>${shoppingItem.id}</td>
<td>${shoppingItem.name}</td>
<td>¥${shoppingItem.price}</td>
<td>${shoppingItem.amount}</td>
<td>¥${shoppingItem.sum}</td>
<td><a href="operateCart?id=${shoppingItem.id}&operation=delete">删除</a></td>
</tr>
</c:forEach>
<tr>
<th>总金额</th>
<td></td>
<td></td>
<td></td>
<c:choose>
<c:when test="${totalPrice==null}">
<th style="color: red">¥0.00</th>
</c:when>
<c:otherwise>
<th style="color: red">¥${totalPrice}</th>
</c:otherwise>
</c:choose>
<td></td>
</tr>
</table>
<hr width="800px">
<c:choose>
<c:when test="${totalPrice==null}">
<a href="makeOrder?totalPrice=0.00">生成订单</a>
</c:when>
<c:otherwise>
<a href="makeOrder?totalPrice=${totalPrice}">生成订单</a>
</c:otherwise>
</c:choose>
<c:if test="${orderMsg!=null}">
<script type="text/javascript">alert("${orderMsg}")</script>
<c:remove var="orderMsg"/>
</c:if>
</body>
</html>
新建一个显示商品页面的showProduct.jsp
showPrdouct.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<c:set var="path" value="${pageContext.request.contextPath}"/>
<c:set var="basePath"
value="${pageContext.request.scheme}://${pageContext.request.serverName}:${pageContext.request.serverPort}${path}/"/>
<!DOCTYPE html>
<html>
<head>
<title>显示商品信息</title>
<base href="${basePath}">
<link href="css/main.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<h1>西蒙购物网</h1>
<hr width="700px">
登录用户:<span style="color: red;">${username}</span>
<c:forEach var="i" begin="1" end="5">
</c:forEach>
<a href="logout">注销</a></td>
<hr width="700px">
欢迎选购【<span style="color: blue; font-weight: bold;">${categoryName}</span>】类商品
<hr width="700px">
<table border="0">
<c:forEach varStatus="status" var="product" items="${products}">
<c:if test="${status.count%5==0}">
<tr>
</c:if>
<td>
<table border="0">
<tr><img src="images/product${product.id}.jpg" width="60px" height="60px"></tr>
<tr>
<td><b>商品编号:</b></td>
<td>${product.id}</td>
</tr>
<tr>
<td><b>商品名称:</b></td>
<td>${product.name}</td>
</tr>
<tr>
<td><b>销售价格:</b></td>
<td>${product.price}</td>
</tr>
<tr>
<td><b>上架时间:</b></td>
<td><fmt:formatDate value="${product.addTime}" pattern="yyyy-MM-dd"/></td>
</tr>
<tr>
<td><b>用户操作:</b></td>
<td><a href="operateCart?id=${product.id}&operation=add">加入购物车</a></td>
</tr>
</table>
</td>
<c:if test="${status.count%4==0}">
</tr>
</c:if>
</c:forEach>
</table>
<hr width="700px">
<a href="showCategory">返回商品类别页面</a>
<hr width="700px">
<jsp:include page="showCart.jsp"/>
</body>
</html>
点击商品类别可以查看商品,转跳到showProduct.jsp页面
点击加入购物车,可在购物车显示并且计算金额
点击返回商品类别可以返回上一级