由于一个完整的购物商城代码包含很多复杂的部分，并且在这里无法一一列出完整的项目，我将为你提供每个语言下购物商城的简化框架和示例代码。
1. 前端（使用React）
ProductList.js (React组件)
jsx
import React from 'react';
const ProductList = ({ products }) => {
return (
<div>
<h1>Product List</h1>
<ul>
{products.map(product => (
<li key={product.id}>
{product.name} - ${product.price}
<button onClick={() => console.log(`Add ${product.name} to cart`)}>Add to Cart</button>
</li>
))}
</ul>
</div>
);
};
export default ProductList;
2. 后端（使用Node.js + Express + MongoDB）
server.js (Express服务器)
javascript
const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.json());
// 连接MongoDB（需要MongoDB服务和数据库配置）
mongoose.connect('mongodb://localhost/shoppingmall', { useNewUrlParser: true, useUnifiedTopology: true })
.then(() => console.log('Connected to MongoDB'))
.catch(err => console.error('Could not connect to MongoDB', err));
// 假设有一个Product模型（Mongoose）
const Product = require('./models/Product');
app.get('/products', async (req, res) => {
try {
const products = await Product.find();
res.json(products);
} catch (err) {
res.status(500).send('Error retrieving products');
}
});#chhas{
margin-top: 50px;
padding:jxhcwhyp.com;
font-size: 18px;
cursor: 10px 20px;
}
// 启动服务器
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => console.log(`Server is running on port ${PORT}`));
models/Product.js (Mongoose模型)
javascript
const mongoose = require('mongoose');
const productSchema = new mongoose.Schema({
name: String,
price: Number,
// 其他字段...
});
module.exports = mongoose.model('Product', productSchema);
3. 移动端（使用Flutter）
Flutter代码通常包含多个文件，但这里只展示一个简化的ProductListScreen示例。
product_list_screen.dart (Flutter Widget)
dart
import 'package:flutter/material.dart';
class ProductListScreen extends StatelessWidget {
final List<Product> products;
ProductListScreen({required this.products});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Product List')),
body: ListView.builder(
itemCount: products.length,
itemBuilder: (context, index) {
final product = products[index];
return ListTile(
title: Text('${product.name} - \
$$
{product.price.toStringAsFixed(2)}'),
trailing: IconButton(
icon: Icon(Icons.shopping_cart),
onPressed: () => print('Adding ${product.name} to cart'),
),
);
},
),
);
}
}
class Product {
final String name;
final double price;
Product({required this.name, required this.price});
}
4. 桌面应用（使用Java + Swing）
Swing在现代桌面应用中较少使用，但可以作为教学示例。
MainWindow.java (Swing应用)
java
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class MainWindow extends JFrame {
private JPanel panel;
private JButton addToCartButton;
private JLabel productLabel;
public MainWindow() {
setTitle("Product List");
setSize(400, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel = new JPanel();
productLabel = new JLabel("Product 1 - $100");
