购物网站jsp源代码

购物网站的JSP（JavaServer Pages）源代码通常涉及前端展示和后端逻辑处理。以下是一个简单的购物网站JSP源代码示例，包括商品展示页面和购物车功能。

商品展示页面（productList.jsp）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>商品列表</title>
</head>
<body>
    <h1>商品列表</h1>
    <table border="1">
        <tr>
            <th>商品名称</th>
            <th>价格</th>
            <th>操作</th>
        </tr>
        <c:forEach items="${products}" var="product">
            <tr>
                <td>${product.name}</td>
                <td>${product.price}</td>
                <td><a href="addToCart?id=${product.id}">加入购物车</a></td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

购物车页面（cart.jsp）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>购物车</title>
</head>
<body>
    <h1>购物车</h1>
    <table border="1">
        <tr>
            <th>商品名称</th>
            <th>价格</th>
            <th>数量</th>
            <th>小计</th>
            <th>操作</th>
        </tr>
        <c:forEach items="${cart}" var="item">
            <tr>
                <td>${item.product.name}</td>
                <td>${item.product.price}</td>
                <td>${item.quantity}</td>
                <td>${item.product.price * item.quantity}</td>
                <td><a href="removeFromCart?id=${item.product.id}">移除</a></td>
            </tr>
        </c:forEach>
    </table>
    <p>总价: ${totalPrice}</p>
</body>

后端Servlet示例（ProductServlet.java）

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;

@WebServlet("/products")
public class ProductServlet extends HttpServlet {
    private ProductService productService = new ProductService();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        List<Product> products = productService.getAllProducts();
        request.setAttribute("products", products);
        request.getRequestDispatcher("/productList.jsp").forward(request, response);
    }
}

购物车Servlet示例（CartServlet.java）

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;

@WebServlet("/cart")
public class CartServlet extends HttpServlet {
    private CartService cartService = new CartService();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        HttpSession session = request.getSession();
        List<CartItem> cart = (List<CartItem>) session.getAttribute("cart");
        if (cart == null) {
            cart = new ArrayList<>();
            session.setAttribute("cart", cart);
        }
        request.setAttribute("cart", cart);
        request.setAttribute("totalPrice", cart.stream().mapToDouble(item -> item.getProduct().getPrice() * item.getQuantity()).sum());
        request.getRequestDispatcher("/cart.jsp").forward(request, response);
    }
}