golang中 UTF-8 和GBK格式的转换

func main() {
	str := "测试"
	utf8By := []byte(str)
	gbkBy, _ := Utf8ToGbk(utf8By)
	// 直接打印用string转类型的gkb字节数组，会乱码
	fmt.Println("打印GBK", string(gbkBy))
	fmt.Println("UTF8字节长度: ", len(utf8By), "GBK字节长度: ", len(gbkBy))
	utf8By, _ = GbkToUtf8(gbkBy)
	fmt.Println("打印UTF8", string(utf8By))
	return
}

// Utf8ToGbk UTF-8转GBK
func Utf8ToGbk(s []byte) ([]byte, error) {
	reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewEncoder())
	d, e := io.ReadAll(reader)
	if e != nil {
		return nil, e
	}
	return d, nil
}

// GbkToUtf8 GBK转UTF-8
func GbkToUtf8(s []byte) ([]byte, error) {
	reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder())
	d, e := io.ReadAll(reader)
	if e != nil {
		return nil, e
	}
	return d, nil
}

执行后输出

打印GBK ����
UTF8字节长度:  6 GBK字节长度:  4
打印UTF8 测试