各位帮忙看看，如何把image转换成byte然后用base64编码输出

用png进行encode再 base64就行了

转成[]byte然后base64 encodeToString

var b bytes.Buffer png.Encode(&b, img) base64Str := "data:image/png;base64," + base64.StdEncoding.EncodeToString(b.Bytes())