Golang读写文件操作

package common

import (
    "io/ioutil"
    "os"
    "os/exec"
    "path"
)

func Exist(filename string) bool {
    _, err := os.Stat(filename)
    return err == nil
}

func Touch(filename string) {
    exec.Command("touch", filename).Run()
}

func ReadToString(filePath string) (string, error) {
    b, err := ioutil.ReadFile(filePath)
    if err != nil {
        return "", err
    }
    return string(b), nil
}

func ReadToBytes(filePath string) ([]byte, error) {
    b, err := ioutil.ReadFile(filePath)
    if err != nil {
        return []byte(""), err

    }
    return b, nil
}

func WriteBytes(filePath string, b []byte) (int, error) {
    os.MkdirAll(path.Dir(filePath), os.ModePerm)
    fw, err := os.Create(filePath)
    if err != nil {
        return 0, err
    }
    defer fw.Close()
    return fw.Write(b)
}