Error writes v into error log.

Errorf writes v with format into error log.

Errorw writes msg along with fields into error log.

Info writes v into error log.

Infof writes v with format into error log.

Infow writes msg along with fields into error log.

SetLevel sets the logging level.

SetUp sets up the logx.

Slow writes v into slow log.

Slowf writes v with format into slow log.

Sloww writes msg along with fields into slow log.

Stat writes v into error log.

Statf writes v with format into error log.

Statw writes msg along with fields into error log.

WithCoolDownMillis customizes logging on writing call stack interval.

WithField k-v.

WithGzip customizes logging to automatically gzip the log files.

WithKeepDays customizes logging to keep logs with days.

ErrorLevel includes errors.

InfoLevel logs everything.

SevereLevel only log severe messages.

StatLevel includes stat.

DailyRotateRule 日志规则实现(按天).

RotateLogger 结构体是一个日志切割的实现。 需要实现 io.{Closer,Writer} 接口方法，从而实现写和关操作。.