go 提供了标准日志库->log
设置格式 SetFlags
log.SetFlags(log.Ldate|log.Ltime |log.LUTC)
具体格式项
const (
Ldate = 1 << iota //日期示例： 2009/01/23
Ltime //时间示例: 01:23:23
Lmicroseconds //毫秒示例: 01:23:23.123123.
Llongfile //绝对路径和行号: /a/b/c/d.go:23
Lshortfile //文件和行号: d.go:23.
LUTC //日期时间转为0时区的
LstdFlags = Ldate | Ltime //Go提供的标准抬头信息
)
设置前缀log.SetPrefix("xxx")
定制自己的日志
var (
Info *log.Logger
Warning *log.Logger
Error * log.Logger
)
func init(){
errFile,err:=os.OpenFile("errors.log",os.O_CREATE|os.O_WRONLY|os.O_APPEND,0666)
if err!=nil{
log.Fatalln("打开日志文件失败：",err)
}
Info = log.New(os.Stdout,"Info:",log.Ldate | log.Ltime | log.Lshortfile)
Warning = log.New(os.Stdout,"Warning:",log.Ldate | log.Ltime | log.Lshortfile)
Error = log.New(io.MultiWriter(os.Stderr,errFile),"Error:",log.Ldate | log.Ltime | log.Lshortfile)
}
func main() {
Info.Println("wow","xxx")
Warning.Printf("wow：%s\n","xxx")
Error.Println("wow")
}
