emoji表情與unicode編碼互轉的實現(JS,JAVA,C#)
前幾天剛好有需求要把emoji對應的Unicode編碼轉換成文字,比如1f601對應的這個笑臉😁,但沒有找到C#的把1f601轉換成文字的方法,用Encoding.Unicode怎么轉換都不對,最后直接復制emoji字符,Visual Studio里面竟然直接顯示出來了,那就直接用字符吧,都不用轉換了,然后不了了之了。
今天搞Markdown編輯器,由于前面GFM的原因,又對編碼進行測試,沒查到什么靠譜資料,到時找到很多emoji和Unicode對照表,https://apps.timwhitlock.info/emoji/tables/unicode拿一個笑臉https://apps.timwhitlock.info/unicode/inspect/hex/1F601開刀~
1.表情字符轉編碼【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結果一致
【C#】
Encoding.UTF8.GetBytes('😁') -> ['f0', '9f', '98', '81']
【js】
encodeURIComponent('😁') -> %F0%9F%98%81
UTF-8結果一致
2.編碼轉表情字符【js】
String.fromCodePoint(’0x1f601’) utf-32
【java】
String emojiName = '1f601'; //其實4個字節 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);//說明一 result[1] = (byte)((num >>> 16)& 0xff ); result[2] = (byte)((num >>> 8) & 0xff ); result[3] = (byte)((num >>> 0) & 0xff ); return result; }c# 漢字和Unicode編碼互相轉換實例
/// <summary>/// <summary>/// 字符串轉Unicode/// </summary>/// <param name='source'>源字符串</param>/// <returns>Unicode編碼后的字符串</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轉字符串/// </summary>/// <param name='source'>經過Unicode編碼的字符串</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)));}參考地址:
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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