搭建工程

创建项目和依赖

创建项目

官方地址：
logback配置：
https://logback.qos.ch/manual/configuration.html
spring配置：
https://docs.spring.io/spring/docs/
mybatis配置：
http://www.mybatis.org/mybatis-3/zh/index.html

maven命令创建web骨架项目

mvn archetype:generate -DarchetypeCatalog=internal -DgroupId=org.seckill -DartifactId=seckill -DarchetypeArtifactId=maven-archetype-webapp

用idea加载pom.xml文件加载maven web项目

修改servlet版本为3.1：
拷贝Tomcat中web项目的web.xml头文件到webapp/web.xml中

把web项目没有的补全：
project structor->Modules，找到项目补全

这里写图片描述

项目依赖

<dependencies>
  <dependency>
    <!-- 使用junit4 -->
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
  </dependency>
  <!-- 补全项目依赖 -->
  <!-- 1:日志 java日志:slf4j,log4j,logback,common-logging
      slf4j 是规范/接口
      日志实现:log4j,logback,common-logging
      使用:slf4j + logback
   -->
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.12</version>
  </dependency>
  <dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-core</artifactId>
    <version>1.1.1</version>
  </dependency>
  <!-- 实现slf4j接口并整合 -->
  <dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.1.1</version>
    <scope>test</scope>
  </dependency>
  <!-- 2.数据库相关依赖 -->
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.35</version>
    <scope>runtime</scope>
  </dependency>
  <!-- 数据库连接池 -->
  <dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1.2</version>
  </dependency>
  <!-- DAO框架:MyBatis依赖 -->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.3.0</version>
  </dependency>
  <!-- mybatis自身实现的spring整合依赖 -->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.2.3</version>
  </dependency>
  <!-- 3.Servlet web相关依赖 -->
  <dependency>
    <groupId>taglibs</groupId>
    <artifactId>standard</artifactId>
    <version>1.1.2</version>
  </dependency>
  <dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
  </dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.5.4</version>
  </dependency>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
  </dependency>
  <!-- 4.spring依赖 -->
  <!-- 4.1.spring核心依赖 -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <!-- 4.2.spring dao层的依赖 -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <!-- 4.3.spring web相关依赖 -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.1.7.RELEASE</version>
  </dependency>
  <!-- 4.4.spring test相关依赖 -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>4.1.7.RELEASE</version>
    <scope>test</scope>
  </dependency>
</dependencies>

秒杀业务分析

秒杀业务分析

这里写图片描述

DAO层设计与开发

数据库设计与编码

-- 数据库初始化脚本

-- 创建数据库
CREATE DATABASE seckill;
-- 使用数据库
use seckill;
-- 创建秒杀库存表
CREATE TABLE seckill(
  `seckill_id` bigint NOT NULL AUTO_INCREMENT COMMENT '商品库存id',
  `name` VARCHAR (120) NOT NULL COMMENT '商品名称',
  `number` INT NOT NULL COMMENT '库存数量',
  `start_time` TIMESTAMP NOT NULL COMMENT '秒杀开启时间',
  `end_time` TIMESTAMP NOT NULL COMMENT '秒杀结束时间',
  `create_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  PRIMARY KEY (seckill_id),
  KEY idx_start_time(start_time),
  KEY idx_end_time(end_time),
  KEY idx_create_time(create_time)
)ENGINE=InnoDB AUTO_INCREMENT=1000 DEFAULT CHARSET=utf8 COMMENT='秒杀库存表';

--  初始化数据
INSERT INTO
  seckill(name,number,start_time,end_time)
VALUE
  ('1000元秒杀iphone6',100,'2015-11-01 00:00:00','2015-11-02 00:00:00'),
  ('500元秒杀ipad2',200,'2015-11-01 00:00:00','2015-11-02 00:00:00'),
  ('300元秒杀小米4',300,'2015-11-01 00:00:00','2015-11-02 00:00:00'),
  ('200元秒杀红米note',400,'2015-11-01 00:00:00','2015-11-02 00:00:00');

--  秒杀成功明细表
--  用户登录认证相关的信息
CREATE TABLE success_killed(
  `seckill_id` bigint NOT NULL COMMENT '秒杀商品id',
  `user_phone` bigint NOT NULL COMMENT '用户手机号',
  `state` tinyint NOT NULL DEFAULT -1 COMMENT '状态标识:-1:无效 0:成功 1:已付款 2:已发货',
  `create_time` TIMESTAMP NOT NULL COMMENT '创建时间',
  PRIMARY KEY (seckill_id,user_phone),/*联合主键*/
  KEY idx_create_time(create_time)
)ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='秒杀成功明细表';

-- 连接数据库控制台
mysql -uroot -p

-- 查看表结构
show tables;

-- 查看表是怎么创建的以及注释是什么
show create table seckill\G

-- 查看表数据
select * from seckill;
select * from success_killed;

DAO实体和接口编码