Golang检查目录是否存在

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使用os.stat()

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package main
import (
   "fmt"
   "os"
)

func main() {
   dir := "new"
   if _, err := os.Stat(dir); os.IsNotExist(err) {
      fmt.Println(dir, "does not exist")
   } else {
      fmt.Println("The provided directory named", dir, "exists")
   }
}

使用os.open()

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package main
import (
   "fmt"
   "os"
)

func main() {
   dir := "go"
   if _, err := os.Open(dir); os.IsNotExist(err) {
      fmt.Println("The directory named", dir, "does not exist")
   } else {
      fmt.Println("The directory namend", dir, "exists")
   }
}

使用mkdir()

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package main
import (
   "fmt"
   "os"
)

func main() {
   dir := "new"
   if err := os.Mkdir(dir, 0755); os.IsExist(err) {
      fmt.Println("The directory named", dir, "exists")
   } else {
      fmt.Println("The directory named", dir, "does not exist")
   }
}