emoji表情与unicode编码互转的实现(JS,JAVA,C#)
前几天刚好有需求要把emoji对应的Unicode编码转换成文字,比如1f601对应的这个笑脸😁,但没有找到C#的把1f601转换成文字的方法,用Encoding.Unicode怎么转换都不对,最后直接复制emoji字符,Visual Studio里面竟然直接显示出来了,那就直接用字符吧,都不用转换了,然后不了了之了。
今天搞Markdown编辑器,由于前面GFM的原因,又对编码进行测试,没查到什么靠谱资料,到时找到很多emoji和Unicode对照表,https://apps.timwhitlock.info/emoji/tables/unicode拿一个笑脸https://apps.timwhitlock.info/unicode/inspect/hex/1F601开刀~
1.表情字符转编码
【C#】
Encoding.UTF32.GetBytes("😁") -> ["1", "f6", "1", "0"]
【js】
"😁".codePointAt(0).toString(16) -> 1f601
【java】
byte[] bytes = "😀".getBytes("utf-32"); System.out.println(getBytesCode(bytes)); private static String getBytesCode(byte[] bytes) { String code = ""; for (byte b : bytes) { code += "\\x" + Integer.toHexString(b & 0xff); } return code; }
UTF-32结果一致
【C#】
Encoding.UTF8.GetBytes("😁") -> ["f0", "9f", "98", "81"]
【js】
encodeURIComponent("😁") -> %F0%9F%98%81
UTF-8结果一致
2.编码转表情字符
【js】
String.fromCodePoint('0x1f601') utf-32
【java】
String emojiName = "1f601"; //其实4个字节 int emojiCode = Integer.valueOf(emojiName, 16); byte[] emojiBytes = int2bytes(emojiCode); String emojiChar = new String(emojiBytes, "utf-32"); System.out.println(emojiChar); public static byte[] int2bytes(int num){ byte[] result = new byte[4]; result[0] = (byte)((num >>> 24) & 0xff);//说明一 result[1] = (byte)((num >>> 16)& 0xff ); result[2] = (byte)((num >>> 8) & 0xff ); result[3] = (byte)((num >>> 0) & 0xff ); return result; }
c# 汉字和Unicode编码互相转换实例
/// <summary> /// <summary> /// 字符串转Unicode /// </summary> /// <param name="source">源字符串</param> /// <returns>Unicode编码后的字符串</returns> public static string String2Unicode(string source) { byte[] bytes = Encoding.Unicode.GetBytes(source); StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < bytes.Length; i += 2) { stringBuilder.AppendFormat("\\u{0}{1}", bytes[i + 1].ToString("x").PadLeft(2, '0'), bytes[i].ToString("x").PadLeft(2, '0')); } return stringBuilder.ToString(); } /// <summary> /// Unicode转字符串 /// </summary> /// <param name="source">经过Unicode编码的字符串</param> /// <returns>正常字符串</returns> public static string Unicode2String(string source) { return new Regex(@"\\u([0-9A-F]{4})", RegexOptions.IgnoreCase | RegexOptions.Compiled).Replace( source, x => string.Empty + Convert.ToChar(Convert.ToUInt16(x.Result("$1"), 16))); }
参考地址:
https://www.jianshu.com/p/8a416537deb3
https://blog.csdn.net/a19881029/article/details/13511729
https://apps.timwhitlock.info/emoji/tables/unicode
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