GoLang文件增删遍历基本操作

先学一学GO语言实用的一面。

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)
}