京东秒杀之秒杀详情

1 编写前端页面（商品详情）

<!DOCTYPE html>
<head><title>商品详情</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><script type="text/javascript" src="/js/jquery.min.js"></script><link rel="stylesheet" type="text/css" href="/bootstrap/css/bootstrap.min.css" /><!-- bootstrap --><script type="text/javascript" src="/bootstrap/js/bootstrap.min.js"></script><script type="text/javascript" src="/jquery-validation/jquery.validate.min.js"></script> <!-- jquery-validator --><script type="text/javascript" src="/jquery-validation/localization/messages_zh.min.js"></script><script type="text/javascript" src="/layer/layer.js"></script><!-- layer --><script type="text/javascript" src="/js/md5.min.js"></script><!-- md5.js --><script type="text/javascript" src="/js/common.js"></script><!-- common.js --><script type="text/javascript" src="/js/socket.js"></script><!-- common.js -->
</head>
<body>
<div class="panel panel-default"><div class="panel-heading">秒杀商品详情</div><div class="panel-body"><div id="userTip" style="display: none"><span> 您还没有登录，请<a href="/login.html">登陆</a>后再操作<br/></span></div><span>没有收货地址的提示。。。</span>
</div>
<table class="table"><tr><td>商品名称</td><td colspan="3" id="goodName"></td></tr><tr><td>商品图片</td><td colspan="3"><img id="goodImg"  width="200" height="200" /></td></tr><tr><td>秒杀开始时间</td><td id="startDate"></td><td id="seckillTip"></td><td><img id="verifyCodeImg" width="80" height="32"  onclick="initVerifyCodeImg()" style="display: none"><input id="verifyCode" style="display: none"><button class="btn btn-primary btn-block" type="button" id="buyButton" onclick="">立即秒杀</button></td></tr><tr><td>商品原价</td><td colspan="3" id="goodPrice"></td></tr><tr><td>秒杀价</td><td colspan="3" id="seckillPrice"></td></tr><tr><td>库存数量</td><td colspan="3" id="stockCount"></td></tr>
</table>
</div>
<script type="text/javascript">var seckillId;$(function () {seckillId = getQueryString("seckillId");initGood();});function initGood(){$(function () {$.ajax({url: "http://localhost:9000/seckill/seckillGood/find?seckillId="+seckillId,type: "get",xhrFields: {withCredentials: true}, //启用cookiesuccess:function (data) {if(data.code==200){//填充表格中的数据renderGood(data.data);}else{layer.msg(data.msg)}}});});}function renderGood(good) {$("#goodName").html(good.goodName);$("#goodImg").prop("src",good.goodImg);$("#startDate").html(good.startDate);$("#goodPrice").html(good.goodPrice);$("#stockCount").html(good.stockCount);$("#seckillPrice").html(good.seckillPrice);//调用时间renderDate(good.startDate,good.endDate);}//定义秒杀的三个阶段var timer;  //计时器//距离抢购开始还有多久var remainStartSeconds;//距离结束还有多久var remainEndSeconds;function renderDate(sDate,eDate) {var startTime = new Date(sDate);  // 2023-11-25 16:00var endTime = new Date(eDate);   // 2023-11-25 18:00var now = new Date();        // 2023-11-25 14:37remainStartSeconds=parseInt((startTime.getTime()-now.getTime())/1000);//秒remainEndSeconds=parseInt((endTime.getTime()-now.getTime())/1000);//秒timer=window.setInterval(showSeckillTip,1000);}function showSeckillTip() {remainStartSeconds--;remainEndSeconds--;if(remainStartSeconds>0){$("#seckillTip").html("距离本场秒杀开始还有"+remainStartSeconds+"秒");//禁用按钮$("#buyButton").prop("disabled",true);}else{if(remainEndSeconds>0){//秒杀中$("#seckillTip").html("秒杀进行中....");//禁用按钮$("#buyButton").prop("disabled",false);}else{$("#seckillTip").html("秒杀结束了");//禁用按钮$("#buyButton").prop("disabled",true);window.clearInterval(timer);//取消计时器}}}</script>
</body>
</html>

2 编写Mapper接口

@Mapper
public interface SeckillGoodMapper {@Select("SELECT * FROM t_seckill_goods")public List<SeckillGood> query();@Select("SELECT * FROM t_seckill_goods where id=#{seckillId}")public SeckillGoodVo find(Long seckillId);
}

3 编写service业务逻辑接口及其实现类

service业务逻辑接口

public interface SeckillGoodService {/*** 查询商品数据* @return*/public List<SeckillGoodVo> query();/*** 查询商品详情* @param seckillId* @return*/public SeckillGoodVo find(Long seckillId);
}

实现类

    @Overridepublic SeckillGoodVo find(Long seckillId) {if (seckillId == null){return null;}//根据场次id查询商品SeckillGood sg=  seckillGoodMapper.find(seckillId);if(sg==null){return null;}List<SeckillGood> seckillGoodList = new ArrayList<>();seckillGoodList.add(sg);//调用聚合的方法List<SeckillGoodVo> seckillGoodVos = getSeckillGoodVos(seckillGoodList);//获取单个对象return seckillGoodVos.get(0);}

4 创建controller层

    @RequestMapping("/find")public Result find(Long seckillId){SeckillGoodVo seckillGoodVo = seckillGoodService.find(seckillId);return Result.success(seckillGoodVo);}