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qiurunze 2018-12-10 10:11:39 +08:00
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@ -20,11 +20,16 @@
#### [提交合并代码规范](/docs/code-criterion.md)
> 秒杀注意事项
> 秒杀注意事项以及整体简略设计
#### [1.如何解决卖超问题]()
--在sql加上判断防止数据边为负数
--数据库加唯一索引防止用户重复购买
--redis预减库存减少数据库访问　内存标记减少redis访问　请求先入队列缓冲，异步下单，增强用户体验
#### [1.全局异常处理拦截]()
> 1.定义全局的异常拦截器
> 2.定义了全局异常类型
> 3.只返回和业务有关的
#### [解决分布式session]()
--生成一个随机的uuid一类的写回到cookie中
--redis 内存写入