Golang 实现复制文件夹同时复制文件

/**
 * 拷贝文件夹,同时拷贝文件夹中的文件
 * @param srcPath 需要拷贝的文件夹路径: D:/test
 * @param destPath 拷贝到的位置: D:/backup/
 */
func CopyDir(srcPath string, destPath string) error {
 //检测目录正确性
 if srcInfo, err := os.Stat(srcPath); err != nil {
 fmt.Println(err.Error())
 return err
 } else {
 if !srcInfo.IsDir() {
 e := errors.New("srcPath不是一个正确的目录！")
 fmt.Println(e.Error())
 return e
 }
 }
 if destInfo, err := os.Stat(destPath); err != nil {
 fmt.Println(err.Error())
 return err
 } else {
 if !destInfo.IsDir() {
 e := errors.New("destInfo不是一个正确的目录！")
 fmt.Println(e.Error())
 return e
 }
 }
 //加上拷贝时间:不用可以去掉
 destPath = destPath + "_" + time.Now().Format("20060102150405")
 err := filepath.Walk(srcPath, func(path string, f os.FileInfo, err error) error {
 if f == nil {
 return err
 }
 if !f.IsDir() {
 path := strings.Replace(path, "\\", "/", -1)
 destNewPath := strings.Replace(path, srcPath, destPath, -1)
 fmt.Println("复制文件:" + path + " 到 " + destNewPath)
 copyFile(path, destNewPath)
 }
 return nil
 })
 if err != nil {
 fmt.Printf(err.Error())
 }
 return err
}
//生成目录并拷贝文件
func copyFile(src, dest string) (w int64, err error) {
 srcFile, err := os.Open(src)
 if err != nil {
 fmt.Println(err.Error())
 return
 }
 defer srcFile.Close()
 //分割path目录
 destSplitPathDirs := strings.Split(dest, "/")
 //检测时候存在目录
 destSplitPath := ""
 for index, dir := range destSplitPathDirs {
 if index  len(destSplitPathDirs)-1 {
 destSplitPath = destSplitPath + dir + "/"
 b, _ := pathExists(destSplitPath)
 if b == false {
 fmt.Println("创建目录:" + destSplitPath)
 //创建目录
 err := os.Mkdir(destSplitPath, os.ModePerm)
 if err != nil {
  fmt.Println(err)
 }
 }
 }
 }
 dstFile, err := os.Create(dest)
 if err != nil {
 fmt.Println(err.Error())
 return
 }
 defer dstFile.Close()
 return io.Copy(dstFile, srcFile)
}
//检测文件夹路径时候存在
func pathExists(path string) (bool, error) {
 _, err := os.Stat(path)
 if err == nil {
 return true, nil
 }
 if os.IsNotExist(err) {
 return false, nil
 }
 return false, err
}

package main
import (
 "flag"
 "fmt"
 "os"
 "path/filepath"
 "strings"
 "time"
  "github.com/Unknwon/com"
)
const (
 IsDirectory = iota
 IsRegular
 IsSymlink
)
type sysFile struct {
 fType int
 fName string
 fLink string
 fSize int64
 fMtime time.Time
 fPerm os.FileMode
}
type F struct {
 files []*sysFile
}
func (self *F) visit(path string, f os.FileInfo, err error) error {
 if f == nil {
  return err
 }
 var tp int
 if f.IsDir() {
  tp = IsDirectory
 } else if (f.Mode()  os.ModeSymlink) > 0 {
  tp = IsSymlink
 } else {
  tp = IsRegular
 }
 inoFile := sysFile{
  fName: path,
  fType: tp,
  fPerm: f.Mode(),
  fMtime: f.ModTime(),
  fSize: f.Size(),
 }
 self.files = append(self.files, inoFile)
 return nil
}
func main() {
 flag.Parse()
 sourcedir := flag.Arg(0)
 decdir := flag.Arg(1)
 source := F{
  files: make([]*sysFile, 0),
 }
 err := filepath.Walk(sourcedir, func(path string, f os.FileInfo, err error) error {
  return source.visit(path, f, err)
 })
 if err != nil {
  fmt.Printf("filepath.Walk() returned %v\n", err)
 }
 dec := F{
  files: make([]*sysFile, 0),
 }
 err = filepath.Walk(decdir, func(path string, f os.FileInfo, err error) error {
  return dec.visit(path, f, err)
 })
 if err != nil {
  fmt.Printf("filepath.Walk() returned %v\n", err)
 }
 for _, v := range source.files {
  if com.IsFile(v.fName) == true {
   tmp1 := strings.Split(v.fName, "\\")
   sourcename := tmp1[len(tmp1)-1]
   for _, r := range dec.files {
    if com.IsFile(r.fName) == true {
     tmp2 := strings.Split(r.fName, "\\")
     decname := tmp2[len(tmp2)-1]
     if sourcename == decname {
      fmt.Printf("the same file: %s\n", sourcename)
      com.Copy(v.fName, r.fName)
     }
    }
   }
  }
 }
}