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("Info_level:","info")
        Warning.Printf("Warning_level：%s\n","FBI Warning")
        Error.Println("Error")}