Go CopyFile 异常处理 实现

Go，CopyFile 实现 + 异常处理

package copyfileimport ("io""os")func CopyFile(dst, src String) (w int64, err error) {srcFile, err := os.Open(src)if err != nil {return}defer srcFile.Close()dstFile, err := os.Open(dst)if err != nil {return}defer dstFile.Close()return io.Copy(dstFile, srcFile)}