From e5c993324de9acddb0664be2dec53b9a4806fb91 Mon Sep 17 00:00:00 2001
From: duandazhi <ab601026460@163.com>
Date: Fri, 26 Mar 2021 15:13:27 +0800
Subject: [PATCH] =?UTF-8?q?SpecialSymbolUtil=20=E7=89=B9=E6=AE=8A=E5=AD=97?=
 =?UTF-8?q?=E7=AC=A6=E5=B7=A5=E5=85=B7=E7=B1=BB?=
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---
 .../hutool/core/text/SpecialSymbolUtil.java   | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 hutool-core/src/main/java/cn/hutool/core/text/SpecialSymbolUtil.java

diff --git a/hutool-core/src/main/java/cn/hutool/core/text/SpecialSymbolUtil.java b/hutool-core/src/main/java/cn/hutool/core/text/SpecialSymbolUtil.java
new file mode 100644
index 000000000..3666775ec
--- /dev/null
+++ b/hutool-core/src/main/java/cn/hutool/core/text/SpecialSymbolUtil.java
@@ -0,0 +1,68 @@
+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);
+	}
+}