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SpecialSymbolUtil 特殊字符工具类

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duandazhi 2021-03-26 15:13:27 +08:00
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package cn.hutool.core.text;
/**
* 符号工具类
* @author 段大志
* @date 2021/3/26 12:21
* 别名：Symbol or special signal or Special symbols
* 说明：获取常见的特殊符号，如：带圈数字、
*
* {@link UnicodeUtil}
* @link 百度百科 https://baike.baidu.com/item/%E7%89%B9%E6%AE%8A%E5%AD%97%E7%AC%A6/112715?fr=aladdin
* @link 360百科 https://baike.so.com/doc/5408938-5646935.html
* @link 百科 https://www.baike.com/wikiid/3469869303298461399?prd=home_search&search_id=5bm572esa2k000&view_id=1takcxx7kjc000
* @link coolsymbol https://coolsymbol.com/
* @link 维基百科wikipedia https://en.wikipedia.org/wiki/List_of_Unicode_characters#Unicode_symbols
*
* @since 5.6.2
*/
public class SpecialSymbolUtil {
public static final String UNICODE_START_CHAR = "\\u";
private SpecialSymbolUtil(){}
/**
* 获取带圈数字 /封闭式字母数字 ，从1-20,超过1-20报错
*
* 0 1 2 3 4 5 6 7 8 9 A B C D E F
* U+246x ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ ⑬ ⑭ ⑮ ⑯
* U+247x ⑰ ⑱ ⑲ ⑳ ⑴ ⑵ ⑶ ⑷ ⑸ ⑹ ⑺ ⑻ ⑼ ⑽ ⑾ ⑿
* U+248x ⒀ ⒁ ⒂ ⒃ ⒄ ⒅ ⒆ ⒇ ⒈ ⒉ ⒊ ⒋ ⒌ ⒍ ⒎ ⒏
* U+249x ⒐ ⒑ ⒒ ⒓ ⒔ ⒕ ⒖ ⒗ ⒘ ⒙ ⒚ ⒛ ⒜ ⒝ ⒞ ⒟
* U+24Ax ⒠ ⒡ ⒢ ⒣ ⒤ ⒥ ⒦ ⒧ ⒨ ⒩ ⒪ ⒫ ⒬ ⒭ ⒮ ⒯
* U+24Bx ⒰ ⒱ ⒲ ⒳ ⒴ ⒵ Ⓐ Ⓑ Ⓒ Ⓓ Ⓔ Ⓕ Ⓖ Ⓗ Ⓘ Ⓙ
* U+24Cx Ⓚ Ⓛ Ⓜ Ⓝ Ⓞ Ⓟ Ⓠ Ⓡ Ⓢ Ⓣ Ⓤ Ⓥ Ⓦ Ⓧ Ⓨ Ⓩ
* U+24Dx ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ ⓙ ⓚ ⓛ ⓜ ⓝ ⓞ ⓟ
* U+24Ex ⓠ ⓡ ⓢ ⓣ ⓤ ⓥ ⓦ ⓧ ⓨ ⓩ ⓪ ⓫ ⓬ ⓭ ⓮ ⓯
* U+24Fx ⓰ ⓱ ⓲ ⓳ ⓴ ⓵ ⓶ ⓷ ⓸ ⓹ ⓺ ⓻ ⓼ ⓽ ⓾ ⓿
* @link Unicode_symbols https://en.wikipedia.org/wiki/List_of_Unicode_characters#Unicode_symbols
* @link Enclosed Alphanumerics https://en.wikipedia.org/wiki/Enclosed_Alphanumerics
*
* <code>
* System.out.println(enclosedAlphanumericsStyle1ByInt(1));
* System.out.println(enclosedAlphanumericsStyle1ByInt(2));
* System.out.println(enclosedAlphanumericsStyle1ByInt(3));
* System.out.println(enclosedAlphanumericsStyle1ByInt(4));
* System.out.println(enclosedAlphanumericsStyle1ByInt(14));
* System.out.println(enclosedAlphanumericsStyle1ByInt(18));
* System.out.println(enclosedAlphanumericsStyle1ByInt(19));
* System.out.println(enclosedAlphanumericsStyle1ByInt(20));
* </code>
*
* @param number 十进制数字，从1、-->10、11--->20
* @return ①②③④⑤⑥⑦⑧⑩⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳
*/
public static String enclosedAlphanumericsCircleByInt(int number) {
if (number <= 0 || number > 20) {
throw new IllegalArgumentException("number取值范围是[1-20]的正整数,包含1和20");
}
String start = "①";
String unicodeStart = UnicodeUtil.toUnicode(start).substring(UNICODE_START_CHAR.length(),
UnicodeUtil.toUnicode(start).length() - 1);
String beginHex = unicodeStart.substring(0, 2); // begin: U+246x的24
String middleHex = number >= 17 ? "7" : "6"; // U+246x的6
String endHex = Integer.toHexString(number >= 17 ? number - 17 : number - 1); // A
// U + 24 + 60
String unicodeStr = UNICODE_START_CHAR + beginHex + middleHex + endHex;
return UnicodeUtil.toString(unicodeStr);
}
}