os.MkdirAll 创建多级目录

err:=os.Mkdir("./dirname",os.ModePerm)
if err!=nil{
   fmt.Println(err)
}

err:=os.Mkdir("./dirname",os.ModePerm)
if err!=nil{
   fmt.Println(err)
}

uploadDir := "static/img/" + time.Now().Format("20060102")
err := os.MkdirAll( uploadDir , 777)  
if err!=nil{
   fmt.Println(err)  // 打印报错信息

}

os.Getwd() //获取当前目录

file1, _ := os.Create("./test.go") 
defer file1.Close()

filename, _ := os.OpenFile("./test.go", os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
defer filename.Close()

os.path.join("E:","test.go")  \\  则地址为 E:\test.go

os.Remove("A/1/2/test")

os.RemoveAll("dirname")

os.Rename("./test.go", "./test2.go")