基于SpringMVC+Spring+MyBatis实现秒杀系统【数据库接口】

-- 创建数据库
CREATE DATABASE seckill;
-- 使用数据库
use seckill;
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 ‘秒杀开始时间‘,
  `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)
VALUES
  (‘1000元秒杀iphone6‘,100,‘2016-01-01 00:00:00‘,‘2016-01-02 00:00:00‘),
  (‘800元秒杀ipad‘,200,‘2016-01-01 00:00:00‘,‘2016-01-02 00:00:00‘),
  (‘6600元秒杀mac book pro‘,300,‘2016-01-01 00:00:00‘,‘2016-01-02 00:00:00‘),
  (‘7000元秒杀iMac‘,400,‘2016-01-01 00:00:00‘,‘2016-01-02 00:00:00‘);

-- 秒杀成功明细表
-- 用户登录认证相关信息(简化为手机号)
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‘;

public interface SeckillDao {

    /**减库存**/
    int reduceNumber(@Param("seckillId") long seckillId,@Param("killTime") Date killTime);

    /**查询秒杀商品详情**/
    Seckill queryById(long seckillId);

    /**查询所有秒杀商品**/
    List<Seckill> queryAll(@Param("offset") int offset,@Param("limit") int limit);

}


public interface SuccessKillDao {

    /**
     * 插入秒杀商品明细
     * **/
    int insertSuccessKilled(@Param("seckillId") long seckillId,@Param("userPhone")  long userPhone);

    /**
     * 根据商品id查询商品秒杀明细，并且同时返回商品明细
     * **/
    SuccessKilled queryByIdWithSeckill(@Param("seckillId") long seckillId,@Param("userPhone")  long userPhone);

}

<?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.seckill.dao.SeckillDao">
    <update id="reduceNumber">
        update seckill set number=number-1
        where seckill_Id=#{seckillId}
        and start_time <![CDATA[ <= ]]> #{killTime}
        and end_time <![CDATA[ >= ]]> #{killTime}
        and number>0
    </update>
    
    <select id="queryById" resultType="Seckill">
        select seckill_id,name,number,start_time,end_time,create_time
        from seckill
        where seckill_id=#{seckillId}
    </select>
    
    <select id="queryAll" resultType="Seckill">
        select seckill_id,name,number,start_time,end_time,create_time
        from seckill
        order by create_time
        limit #{offset},#{limit}
    </select>
</mapper>

<?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.seckill.dao.SuccessKillDao">


    <!--主键重复时不再插入数据-->
    <insert id="insertSuccessKilled">

        insert ignore into  success_killed (seckill_id,user_Phone,state) values (#{seckillId},#{userPhone},0)
    </insert>

    <select id="queryByIdWithSeckill" resultType="SuccessKilled">
        select
        sk.seckill_id,
        sk.user_Phone,
        sk.state,
        sk.create_time,
        s.seckill_id "seckill.seckill_id",
        s.name "seckill.name",
        s.number "seckill.number",
        s.create_time "seckill.create_time",
        s.start_time "seckill.start_time",
        s.end_time "seckill.end_time"
        from success_killed sk
        inner join seckill s on sk.seckill_id = s.seckill_id
        where sk.seckill_id=#{seckillId} and sk.user_Phone=#{userPhone}
    </select>
</mapper>