logger的坑

logger 默认继承上级的lever, 子logger重载需要指明

additivity=”false” 不在父logger里面输出

todo logger最佳实践

todo logger收集最佳实践

https://cloud.tencent.com/developer/article/1058172

http://tech.lede.com/2017/06/30/rd/server/loggingHabit/

http://www.mybatis.org/mybatis-3/zh/logging.html

https://github.com/alibaba/druid/wiki/Druid%E4%B8%AD%E4%BD%BF%E7%94%A8log4j2%E8%BF%9B%E8%A1%8C%E6%97%A5%E5%BF%97%E8%BE%93%E5%87%BA