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秒杀项目之秒杀商品操作

2022-03-20 22:32:14 作者：互联网

一、秒杀商品显示

1、使用生成器生成对应的表

记得在每个mapper类加入注解供spring扫描：

@Repository

2、后端写得到秒杀商品的方法

①、建实体类vo

用于连表查询，得到商品名字

package com.example.seckill.vo;

import com.example.seckill.pojo.SeckillGoods;
import lombok.Data;

@Data
public class SeckillGoodsVo extends SeckillGoods {
    
    private String goodsName;
}

②、在SexkillGoodsMapper.xml文件中定义sql

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.seckill.mapper.SeckillGoodsMapper">

    <select id="queryAll" resultType="com.example.seckill.vo.SeckillGoodsVo">
        select sg.*,
               g.goods_name
        from t_seckill_goods sg,
             t_goods g
        where sg.goods_id = g.gid;
    </select>
</mapper>

③、在mapper中定义

package com.example.seckill.mapper;

import com.example.seckill.pojo.SeckillGoods;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.seckill.vo.SeckillGoodsVo;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * <p>
 * 秒杀商品信息表 Mapper 接口
 * </p>
 *
 * @author lv
 * @since 2022-03-19
 */
@Repository
public interface SeckillGoodsMapper extends BaseMapper<SeckillGoods> {

    List<SeckillGoodsVo> queryAll();
}

④、service层与controller层

service:

ISeckillGoodsService:

package com.example.seckill.service;

import com.example.seckill.pojo.SeckillGoods;
import com.baomidou.mybatisplus.extension.service.IService;
import com.example.seckill.util.response.ResponseResult;
import com.example.seckill.vo.SeckillGoodsVo;

import java.util.List;

/**
 * <p>
 * 秒杀商品信息表 服务类
 * </p>
 *
 * @author lv
 * @since 2022-03-19
 */
public interface ISeckillGoodsService extends IService<SeckillGoods> {

    ResponseResult<List<SeckillGoodsVo>> queryAll();
}

SeckillGoodsServiceImpl:

package com.example.seckill.service.impl;

import com.example.seckill.pojo.SeckillGoods;
import com.example.seckill.mapper.SeckillGoodsMapper;
import com.example.seckill.service.ISeckillGoodsService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.seckill.util.response.ResponseResult;
import com.example.seckill.vo.SeckillGoodsVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * <p>
 * 秒杀商品信息表 服务实现类
 * </p>
 *
 * @author lv
 * @since 2022-03-19
 */
@Service
public class SeckillGoodsServiceImpl extends ServiceImpl<SeckillGoodsMapper, SeckillGoods> implements ISeckillGoodsService {

    @Autowired
    private SeckillGoodsMapper seckillGoodsMapper;

    @Override
    public ResponseResult<List<SeckillGoodsVo>> queryAll() {
       List<SeckillGoodsVo> list= seckillGoodsMapper.queryAll();
        return ResponseResult.success(list);
    }
}

controller:

SeckillGoodsController:

package com.example.seckill.controller;

import com.example.seckill.service.ISeckillGoodsService;
import com.example.seckill.util.response.ResponseResult;
import com.example.seckill.vo.SeckillGoodsVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * <p>
 * 秒杀商品信息表 前端控制器
 * </p>
 *
 * @author lv
 * @since 2022-03-19
 */
@RestController
@RequestMapping("/seckillGoods")
public class SeckillGoodsController {

    @Autowired
    private ISeckillGoodsService seckillGoodsService;

    @RequestMapping("/queryAll")
    public ResponseResult<List<SeckillGoodsVo>> queryAll(){
        return seckillGoodsService.queryAll();
    }

}

得到秒杀商品数据：

3、前端显示数据

①、编辑跳转秒杀界面

goodList.ftl:

<!DOCTYPE html>
<html lang="en">
<head>
    <#include "../common/head.ftl">
    <style>
        .layui-this{
            background: deepskyblue !important;
        }
    </style>

</head>
<body class="layui-container layui-bg-orange">
<div class="layui-tab">
    <ul class="layui-tab-title">
        <li class="layui-this">普通商品</li>
        <li>秒杀商品</li>
    </ul>
    
        <#--    普通商品-->
    <div class="layui-tab-content">
        <div class="layui-tab-item layui-show">
            <div class="layui-form-item">
                <label class="layui-form-label">搜索栏</label>
                <div class="layui-input-inline">
                    <input type="text" id="normal_name" name="text" placeholder="请输入搜索内容" class="layui-input">
                </div>
                <div class="layui-input-inline">
                    <button class="layui-btn layui-btn-primary" id="normal_search">标签：goods,seckill,title,商品,秒杀,import,操作,com,example	

来源： https://blog.csdn.net/weixin_60389087/article/details/123601288