1.檢查目錄是否存在

package main

import (
    "fmt"
    "os"
)

func main() {

    dir := `F:\\code\\go\\src\\brandon\\go-csv\\data`

    if IsDirExist(dir) {
        fmt.Printf("%s exist!", dir)
    } else {
        fmt.Println("dir is not exist!")
    }

}

func IsDirExist(dir string) bool {
    fi, err := os.Stat(dir)

    if
 
 err != nil {
        return os.IsExist(err)
    } else {
        return fi.IsDir()
    }
}

2.讀取指定目錄下的檔案

package main

import (
    "fmt"
    "io/ioutil"
    "os"
)

func main() {

    dir := `F:\\code\\go\\src\\brandon\\go-csv\\data`

    b, fileList := readDirectory(dir)
    if b {
        fmt.Printf("fileList size = %d\r\n"
 
, len(fileList))
        printFileList(fileList)
    }

}

func IsDirExist(dir string) bool {
    fi, err := os.Stat(dir)

    if err != nil {
        return os.IsExist(err)
    } else {
        return fi.IsDir()
    }
}

/*
 * 讀取目錄內的檔案
 */
func readDirectory(dir string) (b bool, fl []string) {
    //檢查目錄是否存在
 

    if !IsDirExist(dir) {
        return false, nil
    }

    files, _ := ioutil.ReadDir(dir)

    var fileList []string
    fileList = make([]string, len(files))

    i := 0
    for _, file := range files {
        if file.IsDir() {
            continue
        } else {
            fileList[i] = file.Name()
            i++
        }
    }

    ret := false
    if len(fileList) > 0 {
        ret = true
    }

    return ret, fileList
}

func printFileList(fl []string) {
    for i := 0; i < len(fl); i++ {
        fmt.Println(fl[i])
    }
}