高并发秒杀业务 WEB层
WEB层
前端页面流程
详情页流程逻辑
Restful接口设计
是一种优雅的URL表述方式，资源的状态和状态转移
整合SpringMVC框架
- 在web.xml配置前端控制器，加载配置文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!--配置DispatcherServlet-->
<servlet>
<servlet-name>seckill-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--配置springMVC需要加载的配置文件
spring-dao.xml, spring-service.xml, spring-web.xml
Mybatis被整合到spring中，spring被和springmvc已经被整合到了一起
-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>seckill-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
- spring-web.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--配置springMVC-->
<!--1:开启spring的注解模式，之后可以使用注解去映射url，方法-->
<!--2:提供一一列：数据绑定，数字和日期的format-->
<!--3:xml,json的默认读写-->
<mvc:annotation-driven/>
<!--servlet-mapping 映射路径:"/"-->
<!--1.静态资源的处理-->
<!--2.允许使用/做整体映射-->
<mvc:default-servlet-handler/>
<!--3.配置jsp，显示viewResolver-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--4.扫描web相关的bean,放到spring容器-->
<context:component-scan base-package="org.seckill.web"></context:component-scan>
</beans>
springMVC实现Restful接口
package org.seckill.web;
import org.seckill.dto.Exposer;
import org.seckill.dto.SeckillExecution;
import org.seckill.dto.SeckillResult;
import org.seckill.entity.Seckill;
import org.seckill.enums.SeckillStaEnum;
import org.seckill.exception.RepeatKillException;
import org.seckill.exception.SeckillCloseException;
import org.seckill.service.SeckillService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import java.util.Date;
import java.util.List;
@Controller
@RequestMapping("/seckill")//url:/模块/资源/{id}/细分
public class SeckillController {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
private SeckillService seckillService;
@RequestMapping(value = "/list",method = RequestMethod.GET)
public String list(Model model){
//获取列表页
List<Seckill> list = seckillService.getSeckillList();
model.addAttribute("list", list);
//list.jsp + model = ModelAndView
return "list";
}
@RequestMapping(value = "/{seckillId}/detail",method = RequestMethod.GET)
public String detail(@PathVariable("seckillId") Long seckillId , Model model){
if(seckillId == null){
return "redirect:/seckill/list";
}
Seckill seckill = seckillService.getById(seckillId);
if(seckill==null){
return "forward:/seckill/list";
}
model.addAttribute("seckill",seckill);
return "detail";
}
@ResponseBody
@RequestMapping(value = "/{seckillId}/exposer",
method = RequestMethod.POST,
produces = {"application/json;charset=UTF-8"})
public SeckillResult<Exposer> exposer(Long seckillId){
SeckillResult<Exposer> result;
try{
Exposer exposer = seckillService.exportSeckillUrl(seckillId);
result = new SeckillResult<Exposer>(true, exposer);
}catch (Exception e){
logger.error(e.getMessage(),e);
result = new SeckillResult<Exposer>(false, e.getMessage());
}
return result;
}
@RequestMapping(value = "/{seckillId}/{md5}/execution",
method = RequestMethod.POST,
produces = {"application/json;charset=UTF-8"})
@ResponseBody
public SeckillResult<SeckillExecution> execute(@PathVariable("seckillId") Long seckillId,
@PathVariable("md5") String md5,
@CookieValue(value = "killphone",required = false) Long phone){
if(phone == null){
return new SeckillResult<SeckillExecution>(false,"未注册");
}
SeckillResult<SeckillExecution> result;
try{
SeckillExecution execution = seckillService.executeSeckill(seckillId,phone,md5);
return new SeckillResult<SeckillExecution>(true,execution);
}catch (RepeatKillException e){
SeckillExecution execution = new SeckillExecution(seckillId, SeckillStaEnum.REPEAT_KILL);
return new SeckillResult<SeckillExecution>(false,execution);
}catch (SeckillCloseException e){
SeckillExecution execution = new SeckillExecution(seckillId, SeckillStaEnum.END);
return new SeckillResult<SeckillExecution>(false,execution);
}catch (Exception e){
SeckillExecution execution = new SeckillExecution(seckillId, SeckillStaEnum.INNER_ERROR);
return new SeckillResult<SeckillExecution>(false,execution);
}
}
@RequestMapping(value = "/time/now",method = RequestMethod.GET)
public SeckillResult<Long> time(){
Date now = new Date();
return new SeckillResult<Long>(true,now.getTime());
}
}
前端
列表页
list.jsp
<%@page contentType="text/html; charset=UTF-8" language="java" %>
<%@include file="common/tag.jsp"%>
<!DOCTYPE html>
<html>
<head>
<title>秒杀商品列表</title>
<%@include file="common/head.jsp" %>
</head>
<body>
<div class="container">
<div class="panel panel-default">
<div class="panel-heading text-center">
<h2>秒杀列表</h2>
</div>
<div class="panel-body">
<table class="table table-hover">
<thead>
<tr>
<th>名称</th>
<th>库存</th>
<th>开始时间</th>
<th>结束时间</th>
<th>创建时间</th>
<th>详情页</th>
</tr>
</thead>
<tbody>
<c:forEach items="${list}" var="sk">
<tr>
<td>${sk.name}</td>
<td>${sk.number}</td>
<td>
<fmt:formatDate value="${sk.startTime}" pattern="yyyy-MM-dd HH:mm:ss" />
</td>
<td>
<fmt:formatDate value="${sk.endTime}" pattern="yyyy-MM-dd HH:mm:ss" />
</td>
<td>
<fmt:formatDate value="${sk.createTime}" pattern="yyyy-MM-dd HH:mm:ss" />
</td>
<td><a class="btn btn-info" href="/seckill/${sk.seckillId}/detail" target="_blank">详情</a></td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
<!-- jQuery文件。务必在bootstrap.min.js 之前引入 -->
<script src="http://apps.bdimg.com/libs/jquery/2.0.0/jquery.min.js"></script>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</body>
</html>
详情页
detail.jsp
<%@page contentType="text/html; charset=UTF-8" language="java" %>
<%@include file="common/tag.jsp" %>
<!DOCTYPE html>
<html>
<head>
<title>秒杀详情页</title>
<%@include file="common/head.jsp" %>
</head>
<body>
<div class="container">
<div class="panel panel-default text-center">
<div class="pannel-heading">
<h1>${seckill.name}</h1>
</div>
<div class="panel-body">
<h2 class="text-danger">
<%--显示time图标--%>
<span class="glyphicon glyphicon-time"></span>
<%--展示倒计时--%>
<span class="glyphicon" id="seckill-box"></span>
</h2>
</div>
</div>
</div>
<%--登录弹出层 输入电话--%>
<div id="killPhoneModal" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h3 class="modal-title text-center">
<span class="glyphicon glyphicon-phone"> </span>秒杀电话:
</h3>
</div>
<div class="modal-body">
<div class="row">
<div class="col-xs-8 col-xs-offset-2">
<input type="text" name="killPhone" id="killPhoneKey"
placeholder="填写手机号^o^" class="form-control">
</div>
</div>
</div>
<div class="modal-footer">
<%--验证信息--%>
<span id="killPhoneMessage" class="glyphicon"> </span>
<button type="button" id="killPhoneBtn" class="btn btn-success">
<span class="glyphicon glyphicon-phone"></span>
Submit
</button>
</div>
</div>
</div>
</div>
</body>
<%--jQery文件,务必在bootstrap.min.js之前引入--%>
<script src="http://apps.bdimg.com/libs/jquery/2.0.0/jquery.min.js"></script>
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<%--使用CDN 获取公共js http://www.bootcdn.cn/--%>
<%--jQuery Cookie操作插件--%>
<script src="http://cdn.bootcss.com/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>
<%--jQuery countDown倒计时插件--%>
<script src="http://cdn.bootcss.com/jquery.countdown/2.1.0/jquery.countdown.min.js"></script>
<script src="/resource/script/seckill.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
//使用EL表达式传入参数
seckill.detail.init({
seckillId:${seckill.seckillId},
startTime:${seckill.startTime.time},//毫秒
endTime:${seckill.endTime.time}
});
})
</script>
</html>
seckill.js
//存放主要交互逻辑的js代码
// javascript 模块化(package.类.方法)
var seckill = {
//封装秒杀相关ajax的url
URL: {
now: function () {
return '/seckill/time/now';
},
exposer: function (seckillId) {
return '/seckill/' + seckillId + '/exposer';
},
execution: function (seckillId, md5) {
return '/seckill/' + seckillId + '/' + md5 + '/execution';
}
},
//验证手机号
validatePhone: function (phone) {
if (phone && phone.length == 11 && !isNaN(phone)) {
return true;//直接判断对象会看对象是否为空,空就是undefine就是false; isNaN 非数字返回true
} else {
return false;
}
},
//详情页秒杀逻辑
detail: {
//详情页初始化
init: function (params) {
//手机验证和登录,计时交互
//规划我们的交互流程
//在cookie中查找手机号
var userPhone = $.cookie('userPhone');
//验证手机号
if (!seckill.validatePhone(userPhone)) {
//绑定手机 控制输出
var killPhoneModal = $('#killPhoneModal');
killPhoneModal.modal({
show: true,//显示弹出层
backdrop: 'static',//禁止位置关闭
keyboard: false//关闭键盘事件
});
$('#killPhoneBtn').click(function () {
var inputPhone = $('#killPhoneKey').val();
console.log("inputPhone: " + inputPhone);
if (seckill.validatePhone(inputPhone)) {
//电话写入cookie(7天过期)
$.cookie('userPhone', inputPhone, {expires: 7, path: '/seckill'});
//验证通过 刷新页面
window.location.reload();
} else {
//todo 错误文案信息抽取到前端字典里
$('#killPhoneMessage').hide().html('').show(300);
}
});
}
//已经登录
//计时交互
var startTime = params['startTime'];
var endTime = params['endTime'];
var seckillId = params['seckillId'];
$.get(seckill.URL.now(), {}, function (result) {
if (result && result['success']) {
var nowTime = result['data'];
//时间判断 计时交互
seckill.countDown(seckillId, nowTime, startTime, endTime);
} else {
console.log('result: ' + result);
alert('result: ' + result);
}
});
}
},
handlerSeckill: function (seckillId, node) {
//获取秒杀地址,控制显示器,执行秒杀
node.hide().html('');
$.get(seckill.URL.exposer(seckillId), {}, function (result) {
//在回调函数种执行交互流程
if (result && result['success']) {
var exposer = result['data'];
if (exposer['exposed']) {
//开启秒杀
//获取秒杀地址
var md5 = exposer['md5'];
var killUrl = seckill.URL.execution(seckillId, md5);
console.log("killUrl: " + killUrl);
//绑定一次点击事件
$('#killBtn').one('click', function () {
//执行秒杀请求
//1.先禁用按钮
$(this).addClass('disabled');//,<-$(this)===('#killBtn')->
//2.发送秒杀请求执行秒杀
$.post(killUrl, {}, function (result) {
if (result && result['success']) {
var killResult = result['data'];
var state = killResult['state'];
var stateInfo = killResult['stateInfo'];
//显示秒杀结果
node.html('' + stateInfo + '');
}
});
});
node.show();
} else {
//未开启秒杀(浏览器计时偏差)
var now = exposer['now'];
var start = exposer['start'];
var end = exposer['end'];
seckill.countDown(seckillId, now, start, end);
}
} else {
console.log('result: ' + result);
}
});
},
countDown: function (seckillId, nowTime, startTime, endTime) {
console.log(seckillId + '_' + nowTime + '_' + startTime + '_' + endTime);
var seckillBox = $('#seckill-box');
if (nowTime > endTime) {
//秒杀结束
seckillBox.html('秒杀结束!');
} else if (nowTime < startTime) {
//秒杀未开始,计时事件绑定
var killTime = new Date(startTime + 1000);//todo 防止时间偏移
seckillBox.countdown(killTime, function (event) {
//时间格式
var format = event.strftime('秒杀倒计时: %D天 %H时 %M分 %S秒 ');
seckillBox.html(format);
}).on('finish.countdown', function () {
//时间完成后回调事件
//获取秒杀地址,控制现实逻辑,执行秒杀
console.log('______fininsh.countdown');
seckill.handlerSeckill(seckillId, seckillBox);
});
} else {
//秒杀开始
seckill.handlerSeckill(seckillId, seckillBox);
}
}
}