Golang determine if a file exists and recursively create a folder

This is a creation in Article, where the information may have evolved or changed.

First, determine whether a file or folder exists

golangDetermining whether a file or folder exists can be os.stat() judged by methods and os.IsExist() methods:

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func isexist(path string)(bool){ _, Err: = OS. Stat (PATH) if err! = Nil{ if os. Isexist (err) { return true } if os. Isnotexist (err) { return false } FMT. PRINTLN (ERR) return false } return true }

Ii. Recursive creation of folders

Recursive folder to os.MkdirAll() method:

1	func Mkdirall string, perm FileMode) Error

The first parameter is the path, and the second is the permission. If the folder does not exist, it is created, and there is no action.

Third, the test code

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Package main Import ( "OS" "FMT" ) //Determine if a file or folder exists func isexist(path string)(bool){ _, Err: = OS. Stat (PATH) if err! = Nil{ if os. Isexist (err) { return true } if os. Isnotexist (err) { return false } FMT. PRINTLN (ERR) return false } return true } func main(){ //Recursive creation of folders ERR: = OS. Mkdirall ("./test/1/2", OS. Modeperm) if err! = Nil{ FMT. PRINTLN (ERR) return } dirs: = []string{"./test/1", "./test/2", "./test/1.txt"} for _, V: = range dirs{ if isexist (v) { FMT. Printf ("%s is exist!", v) }Else{ FMT. Printf ("%s is not exist!", v) } } }

Execute in Terminal:

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ma@ma:/data/code/go/src/file_exist$ Tree . └──file_exist.go 0 Directories, 1 file ma@ma:/data/code/go/src/file_exist$ Go run file_exist.go # running program ./TEST/1 is exist! ./TEST/2 is not exist! ./test/1.txt is not exist! ma@ma:/data/code/go/src/file_exist$ Tree . ├──file_exist.go └──test └──1 └──2 3 Directories, 1 file ma@ma:/data/code/go/src/file_exist$ Touch test/1.txt # Create 1.txt ma@ma:/data/code/go/src/file_exist$ Go run file_exist.go ./TEST/1 is exist! ./TEST/2 is not exist! ./test/1.txt is exist! # 1.txt exists