提供增、删、打印等接口
AddPrinter(snList string) (err error)
Print(content string, sn string, times string) (orderId string, err error)
Delete(sns string) (err error)
PrinterStatus(sn string) (err error)
IsPrintOk(strorderid string)
PrinterLog(sn string, strdate string)
参考test - TestCronByCronStr
参考test - TestEmail
NewStringSet: make一个key为string的map
NewUint64Set: make一个key为uint64的map
可以配合本地緩存,实现单调递增
dm := NewCustomNode()
fmt.Println(dm.GenerateID().UInt64())