Go语言万能的bytes:if f, err := excelize.OpenReader(bytes.NewReader(content)); err == nil {img, err := jpeg.Decode(bytes.NewReader(content))img, err = png.Decode(bytes.NewReader(content))zip.NewReader(bytes.NewReader(data), int64(len(data)))_, err = io.Copy(w, bytes.NewReader(data))enc := xml.NewEncoder(&bytes.Buffer{})zip.NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))//buf := &bytes.Buffer{}