参考博客：

https://blog.csdn.net/m0_56487875/article/details/118603439

小程序登录：

https://www.cnblogs.com/xiaoyantongxue/p/15677256.html

小程序授权登录跳转至秒杀列表页

// pages/seckill/seckill.js
Page({

/\*\*  
 \* 页面的初始数据  
 \*/  
data: {  
    goods: \[\]  
},

/\*\*  
 \* 生命周期函数--监听页面加载  
 \*/  
onLoad: function (options) {  
    var token=wx.getStorageSync('token')  
    wx.request({  
        url: 'http://www.yan.com/api/yk/goods', //仅为示例，并非真实的接口地址  
        header: {token},  
        method: "POST",  
        success: res => {  
            console.log(res.data);  
            this.setData({  
                goods: res.data.data  
            })

        }  
    })

},  
  /\*\*  
 \* 开始抢购按钮  
 \*/  
 start(e){  
    var id=e.target.dataset.id  
    wx.navigateTo({  
      url: '/pages/details/details?id='+id,  
    })

},

})

//数据进行渲染：

秒杀

{{item.goods.goods_name}}
￥{{item.goods.goods_price}}
限量{{item.goods.goods_nums}}
开始抢购

wxss

/**index.wxss**/
.weui-search-bar {
position: relative;
padding: 8px 10px;
display: -webkit-box;
display: -webkit-flex;
display: flex;
box-sizing: border-box;
background-color: #EFEFF4;
border-top: 1rpx solid #D7D6DC;
border-bottom: 1rpx solid #D7D6DC;
}
.weui-icon-search_in-box {
position: absolute;
left: 10px;
top: 7px;
}
.weui-search-bar__form {
position: relative;
-webkit-box-flex: 1;
-webkit-flex: auto;
flex: auto;
border-radius: 5px;
background: #FFFFFF;
border: 1rpx solid #E6E6EA;
}
.weui-search-bar__box {
position: relative;
padding-left: 30px;
padding-right: 30px;
width: 100%;
box-sizing: border-box;
z-index: 1;
}
.weui-search-bar__input {
height: 28px;
line-height: 28px;
font-size: 14px;
}
.weui-search-bar__cancel-btn {
margin-left: 10px;
line-height: 28px;
color: #09BB07;
white-space: nowrap;
}
.swp{
height: 500rpx;
}
.page-section-spacing{
margin-top: 60rpx;
}

.page-scroll-style{
height: 1000rpx;
background: aliceblue;
}
.scroll-view-content{
height: 230rpx;
margin: auto 10rpx;
background: white;
border: 1px solid gray;
}
.scroll-view-image{
width: 200rpx;
height: 200rpx;
margin-top: 15rpx;
margin-left: 20rpx;
float: left;
}
.scroll-view-text{
width: 400rpx;
float: left;
font-weight: 800;
margin-top: 15rpx;
margin-left: 20rpx;
}
.scroll-view-name{
float: left;
font-size: 30rpx;
color: gray;
margin-top: 20rpx;
margin-left: 20rpx;
color: red;
}
.scroll-view_H{
white-space: nowrap;
}
.scroll-view-item{
height: 300rpx;
}
.scroll-view-item_H{
display: inline-block;
width: 100%;
height: 300rpx;
}

php 后台请求的数据路由：

Route::group(['namespace' => 'YK','middleware'=>'jwt'], function () {
//列表展示
Route::post('yk/goods','YkController@goods');
// 详情
Route::post('yk/details','YkController@details');
// 秒杀
Route::post('yk/checkstock','YkController@checkStock');
// 订单的生成
Route::post('yk/order','YkController@createOrder');

});

控制器：

<?php

namespace App\Http\Controllers\YK;

use App\Http\Controllers\Controller;
use App\models\Seckill\Goods;
use App\Models\Seckill\SeckillOrder;
use App\Models\Seckill\SeckillTime;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Redis;
use Predis\Client;

class YkController extends Controller
{

//列表展示  
public function goods()  
{  
    $result = SeckillTime::with(\['goods'\])  
        ->get()->toArray();

    //进行把参与秒杀的商品写入到数据库  
    foreach ($result as $val) {  
        //生成对应商品库存队列  
        $goods = "activity\_goods\_" . $val\['goods\_id'\];  
        for ($i = 0; $i < $val\['sku\_nums'\]; $i++) {  
            Redis::lpush($goods, 1);  
        }

        return response()->json(\['code' => 200, 'message' => 'success', 'data' => $result\]);  
    }  
}

// 详情
public function details(Request $request)
{
$id = $request->post('id');
$res = Goods::where('id', $id)->first();
if ($res) {
return response()->json(['code' => 200, 'message' => 'success', 'data' => $res]);
}
return response()->json(['code' => 500, 'message' => 'no', 'data' => '']);
}

// 抢购：
public function checkStock(Request $request)
{
// 接受用户id
$userID=$request->post('userid');
// 商品id
$goodsID=$request->post('id');
$goods = "activity_goods_".$goodsID;
//对应商品抢购成功用户集合 {1,3,4}
$robSuccessUser = "success_user".$goodsID;
//进行判断当前用户是否在抢成功的队列里面
$result = Redis::sismember($robSuccessUser,$userID);
//如果你在这里面，就抢完了
if ($result) {
//如果抢购成功 返回状态码，进行下单
return response()->json(['code' => 201, 'data' => '', 'msg' => '已经抢购过了']);
}
//减库存，把队列里面的数据从左边 头
$count = Redis::lpop($goods);
if (!$count) {
//如果抢购成功 返回状态码，进行下单
return response()->json(['code' => 202, 'data' => '', 'msg' => '已经抢光了哦']);
}
//把当前这个秒杀的uid存储到中奖的队列里set
$success = Redis::sadd($robSuccessUser, $userID);
if(!$success){
//已经在成功队列里了，加回库存,防止的是同个用户并发请求
Redis::lpush($goods, 1);
//如果抢购成功 返回状态码，进行下单
return response()->json(['errorCode' => 203, 'data' => '', 'msg' => '已经抢购过了']);
}

    //如果抢购成功 返回状态码，进行下单  
    return response()->json(\['errorCode' => 200, 'data' => '', 'msg' => '秒杀成功'\]);

}  

订单的生成
public function createOrder(Request $request)
{

//接受小程序用户id
$userID=$request->post('userid');
//抢购用户id
//商品id
$goodsID = $request->post("goods_id");
//对应商品抢购成功用户集合 {1,3,4}
$robSuccessUser = "success_user".$goodsID;
//进行判断当前用户是否在抢成功的队列里面
$result = Redis::sismember($robSuccessUser,$userID);
//如果你在这里面，就抢完了
if (!$result) {
//如果抢购成功 返回状态码，进行下单
return response()->json(['code' => 203, 'data' => '', 'msg' => '手慢了！']);
}

    DB::beginTransaction();  
    try{  
        //减库存 秒杀的商频库存减去一  
        SeckillTime::decrement('sku\_nums');  
        Goods::decrement('goods\_nums');  
        //生成订单  
        $order\_no='YK'.date('YmdHis').sprintf("%'.09d",$goodsID).mt\_rand(1000,9999);  

// 将订单号和用户id，商品id添加至 订单明细表中
$data=[];
$data['user_id']=$userID;
$data['g_id']=$goodsID;
$data['order']=$order_no;
SeckillOrder::insertGetId($data);
DB::commit();
//下单成功，跳转支付页面
return response()->json(['code' => 200, 'data' => $order_no, 'msg' => '下单成功！']);
}catch (\Exception $e){
DB::rollBack();
}

}

}

小程序抢购，点击抢购进入详情页面：

详情wxjs的代码：

// pages/details/details.js
// 放抖的引入
import tool from "../../utils/tool.js";
Page({
/**
* 页面的初始数据
*/
data: {
goods_details:[]
},

/\*\*  
 \* 生命周期函数--监听页面加载  
 \*/  
onLoad: function (options) {  
    var token=wx.getStorageSync('token')  
    var id=options.id  
    wx.request({  
        url: 'http://www.yan.com/api/yk/details', //仅为示例，并非真实的接口地址  
        header: {token},  
        data:{  
         id:id  
        },  
        method: "POST",  
        success: res => {  
            // console.log(res.data.data);  
            this.setData({  
                goods\_details: res.data.data  
            })

        }  
    })

},  

//秒杀
buyGoods(e){
var token=wx.getStorageSync('token')
var id=e.target.dataset.id;
// 获取用户id
var userid=wx.getStorageSync('userid');
wx.request({
url: 'http://www.yan.com/api/yk/checkstock', //仅为示例，并非真实的接口地址
header: {token},
data:{
id:id,
userid:userid
},
method: "POST",
success: res => {
console.log(res.data);
if(res.data.code==201){
wx.switchTab({
url: '/pages/order/order?gid='+id,
})
wx.showToast({
title: '已经抢购过了，请支付',
})

            }  
            if(res.data.code==202){  
                wx.showToast({  
                  title: '已经抢光了哦',  
                })

            }  
            if(res.data.code==203){  
                wx.showToast({  
                  title: '已经抢购过了,请支付',  
                })  
                wx.switchTab({  
                    url: '/pages/order/order?gid='+id,  
                  })

            }  
            if(res.data.code==200){  
                wx.showToast({  
                  title: '秒杀成功，请支付',  
                })  
                // 跳转至订单页面  
                wx.switchTab({  
                    url: '/pages/order/order?gid='+id,  
                  })  
            }

        }  
    })  
    },

})

详情wxml代码：

{{goods_details.goods_name}}
￥{{goods_details.goods_price}}
限量{{goods_details.goods_nums}}
开始秒杀

    </scroll-view>  

抢购完成进入订单页面：

支付

// pages/order/order.js
Page({

/\*\*  
 \* 页面的初始数据  
 \*/  
data: {  
    goods\_id: ''  
},

/\*\*  
 \* 生命周期函数--监听页面加载  
 \*/  
onLoad: function (options) {  
    // 获取商品id用于订单的生成  
    var gid = options.gid;  
    this.setData({  
        goods\_id: gid  
    })  
},  
// 支付  
pay(e) {  
    //    获取用户id  
    var userid = wx.getStorageSync('userid');  
    var goods\_id = this.data.goods\_id,  
    var token=wx.getStorageSync('token')  
    //  将用户id发送至后台用于生成订单  
    wx.request({  
        url: 'http://www.yan.com/api/yk/order', //仅为示例，并非真实的接口地址  
        data: {  
            userid: userid,  
            goods\_id: goods\_id  
        },  
        header: {token},  
        method: "POST",  
        success(res) {  
            if (res.data.code == 203) {  
                wx.showToast({  
                    title: '手慢啦',  
                })  
            }  
            if (res.data.code == 200) {  
                wx.showToast({  
                    title: '下单成功',  
                })  
            }

        }  
    })

}

})