golang处理emoji表情转码解码

关于golang项目保存emoji表情对utf8格式的数据库会失败，可以先对表情转码存入，然后取值在解码输出

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// EmojiEncode Emoji表情转码
func EmojiEncode(s string) string {
	ret := ""
	rs := []rune(s)
	for i := 0; i < len(rs); i++ {
		if len(string(rs[i])) == 4 {
			r1, r2 := utf16.EncodeRune(rs[i])
			t1 := "\\u" + fmt.Sprintf("%x", r1)
			t2 := "\\u" + fmt.Sprintf("%x", r2)
			ret += t1 + t2
		} else {
			ret += string(rs[i])
		}
	}
	return ret
}

// EmojiDecode Emoji表情解码
func EmojiDecode(s string) string {
	re := regexp.MustCompile("\\\\u[ed][0-9a-f]{3}\\\\u[ed][0-9a-f]{3}")
	result := re.FindAllString(s, -1)
	if len(result) > 0 {
		for k := range result {
			tmp := result[k]
			result[k] = strings.Replace(result[k], "\\u", "0x", -1)
			cov1, _ := strconv.ParseUint(result[k][:6], 0, 32)
			cov2, _ := strconv.ParseUint(result[k][6:], 0, 32)
			covResult := fmt.Sprintf("%c", utf16.DecodeRune(rune(cov1), rune(cov2)))
			s = strings.Replace(s, tmp, covResult, -1)
		}
	}
	return s
}