2022最新微信小程序商城搭建教程(附源码)
2022最新微信小程序商城搭建教程(附源码)
在本教程中,我们将一步步地指导您如何搭建一个完整的微信小程序商城。这个商城将支持用户登录、商品浏览、购物车管理、订单结算等功能。
一、微信小程序商城环境搭建
首先,我们需要在微信开发者工具中创建一个新项目。参考教程: 下载并安装微信开发者工具
* 下载地址: 创建新项目
* 打开微信开发者工具,点击左上角的“新建”按钮 * 输入项目名称和appid(可以随意填写)
3. 配置环境
* 在项目根目录下创建一个`.env`文件,并添加以下内容:
```
微信小程序商城环境配置 NODE_ENV=development ```
二、微信小程序商城功能开发
1. 登录功能首先,我们需要在后端中实现登录功能。我们使用 Node.js 和 Express 框架来搭建一个简单的后端。
步骤一:安装依赖
```bashnpm install express body-parser cookie-parser```
步骤二:编写登录接口
```javascript// app.jsconst express = require('express');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const app = express();
app.use(bodyParser.json());
app.use(cookieParser());
let users = [
{ id:1, username: 'admin', password: '123456' },
];
app.post('/login', (req, res) => {
const { username, password } = req.body;
const user = users.find((user) => user.username === username && user.password === password);
if (user) {
res.cookie('username', user.username, { maxAge:900000 });
res.json({ code:200, message: '登录成功' });
} else {
res.status(401).json({ code:401, message: '登录失败' });
}
});
app.listen(3000, () => {
console.log('服务器启动');
});
```
步骤三:在微信小程序中实现登录功能
```javascript// pages/login.jsPage({
data: {},
onLoad() {},
onShow() {},
login() {
wx.cloud.callFunction({
name: 'login',
data: { username: this.data.username, password: this.data.password },
}).then((res) => {
console.log(res);
if (res.result.code ===200) {
wx.setStorageSync('username', res.result.username);
wx.redirectTo({ url: '/pages/index' });
} else {
wx.showToast({
title: '登录失败',
icon: 'none',
duration:2000,
});
}
}).catch((err) => {
console.error(err);
});
},
});
```
2. 商品浏览功能 步骤一:在后端中实现商品接口
```javascript// app.jsapp.get('/goods', (req, res) => {
const goods = [
{ id:1, name: '商品1', price:10 },
{ id:2, name: '商品2', price:20 },
];
res.json(goods);
});
```
步骤二:在微信小程序中实现商品浏览功能
```javascript// pages/goods.jsPage({
data: {},
onLoad() {},
onShow() {},
getGoods() {
wx.cloud.callFunction({
name: 'goods',
}).then((res) => {
console.log(res);
this.setData({ goods: res.result });
}).catch((err) => {
console.error(err);
});
},
});
```
3. 购物车管理功能 步骤一:在后端中实现购物车接口
```javascript// app.jsapp.post('/cart', (req, res) => {
const { goodsId, count } = req.body;
const cart = wx.getStorageSync('cart') || [];
const index = cart.findIndex((item) => item.goodsId === goodsId);
if (index !== -1) {
cart[index].count += count;
} else {
cart.push({ goodsId, count });
}
wx.setStorageSync('cart', cart);
res.json(cart);
});
```
步骤二:在微信小程序中实现购物车管理功能
```javascript// pages/cart.jsPage({
data: {},
onLoad() {},
onShow() {},
addCart(goodsId, count) {
wx.cloud.callFunction({
name: 'cart',
data: { goodsId, count },
}).then((res) => {
console.log(res);
this.setData({ cart: res.result });
}).catch((err) => {
console.error(err);
});
},
});
```
4. 订单结算功能 步骤一:在后端中实现订单接口
```javascript// app.jsapp.post('/order', (req, res) => {
const { goodsId, count } = req.body;
const order = wx.getStorageSync('order') || [];
const index = order.findIndex((item) => item.goodsId === goodsId);
if (index !== -1) {
order[index].count += count;
} else {
order.push({ goodsId, count });
}
wx.setStorageSync('order', order);
res.json(order);
});
```
步骤二:在微信小程序中实现订单结算功能
```javascript// pages/order.jsPage({
data: {},
onLoad() {},
onShow() {},
settleOrder(goodsId, count) {
wx.cloud.callFunction({
name: 'order',
data: { goodsId, count },
}).then((res) => {
console.log(res);
this.setData({ order: res.result });
}).catch((err) => {
console.error(err);
});
},
});
```
以上就是微信小程序商城的基本功能开发步骤。当然,这只是一个简单的示例,实际项目中可能需要更多的功能和逻辑。
附源码
以下是完整的源码:
* app.js
```javascriptconst express = require('express');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const app = express();
app.use(bodyParser.json());
app.use(cookieParser());
let users = [
{ id:1, username: 'admin', password: '123456' },
];
app.post('/login', (req, res) => {
const { username, password } = req.body;
const user = users.find((user) => user.username === username && user.password === password);
if (user) {
res.cookie('username', user.username, { maxAge:900000 });
res.json({ code:200, message: '登录成功' });
} else {
res.status(401).json({ code:401, message: '登录失败' });
}
});
app.get('/goods', (req, res) => {
const goods = [
{ id:1, name: '商品1', price:10 },
{ id:2, name: '商品2', price:20 },
];
res.json(goods);
});
app.post('/cart', (req, res) => {
const { goodsId, count } = req.body;
const cart = wx.getStorageSync('cart') || [];
const index = cart.findIndex((item) => item.goodsId === goodsId);
if (index !== -1) {
cart[index].count += count;
} else {
cart.push({ goodsId, count });
}
wx.setStorageSync('cart', cart);
res.json(cart);
});
app.post('/order', (req, res) => {
const { goodsId, count } = req.body;
const order = wx.getStorageSync('order') || [];
const index = order.findIndex((item) => item.goodsId === goodsId);
if (index !== -1) {
order[index].count += count;
} else {
order.push({ goodsId, count });
}
wx.setStorageSync('order', order);
res.json(order);
});
app.listen(3000, () => {
console.log('Server started on port3000');
});
```
* pages/login.js
```javascriptPage({
data: {},
onLoad() {},
onShow() {},
login(username, password) {
wx.cloud.callFunction({
name: 'login',
data: { username, password },
}).then((res) => {
console.log(res);
this.setData({ user: res.result });
}).