GoLang文件增删遍历基本操作

package main

import (
"path/filepath"
"flag"
"os"
"fmt"
)

func getFileList(path string) {
err := filepath.Walk(path, func(path string, f os.FileInfo, err error) error {
if (f == nil) {return err}
if f.IsDir() {return nil}
println(path)
return nil
})
if err != nil {
fmt.Printf("filepath.Walk() returned %v\n", err)
}
}

func main() {
userFile := "test.txt"
fout, err := os.Create(userFile)
defer fout.Close()
if err != nil {
fmt.Println(userFile, err)
return
}
for i:=0; i<10; i++ {
fout.WriteString("Just a test!\r\n")
fout.Write([]byte("Just a array string!\r\n"))
}

fin, err := os.Open(userFile)
defer fin.Close()
if err != nil {
fmt.Println(userFile, err)
return
}
buf := make([]byte, 1024)
for {
n, _ := fin.Read(buf)
if 0 == n {
break
}
os.Stdout.Write(buf[:n])
}

flag.Parse()
root := flag.Arg(0)
getFileList(root)
}