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获取带圈字母 /封闭式字母 ，从a-z or A-Z

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duandazhi 2021-03-26 19:19:42 +08:00
parent 739af1befe
commit 80e54e512f
1 changed files with 36 additions and 4 deletions
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40
hutool-core/src/main/java/cn/hutool/core/text/SpecialSymbolUtil.java
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@ -1,5 +1,7 @@
package cn.hutool.core.text;
import java.math.BigInteger;
/**
* 符号工具类
* @author dazer & neusoft
@ -51,18 +53,48 @@ public class SpecialSymbolUtil {
* @param number 十进制数字，从1、-->10、11--->20
* @return ①②③④⑤⑥⑦⑧⑩⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳
*/
public static String enclosedAlphanumericsCircleByInt(int number) {
public static String enclosedNumericsByInt(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
// begin: U+246x的24
String beginHex = unicodeStart.substring(0, 2);
// U+246x的6
String middleHex = number >= 17 ? "7" : "6";
// A
String endHex = Integer.toHexString(number >= 17 ? number - 17 : number - 1);
// U + 24 + 60
String unicodeStr = UNICODE_START_CHAR + beginHex + middleHex + endHex;
return UnicodeUtil.toString(unicodeStr);
}
/**
* 获取带圈字母 /封闭式字母 ，从a-z or A-Z
* 根据字符 获取 Ⓐ Ⓑ Ⓒ Ⓓ Ⓔ Ⓕ Ⓖ Ⓗ Ⓘ Ⓙ Ⓚ Ⓛ Ⓜ Ⓝ Ⓞ Ⓟ Ⓠ Ⓡ Ⓢ Ⓣ Ⓤ Ⓥ Ⓦ Ⓧ Ⓨ Ⓩ ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ ⓙ ⓚ ⓛ ⓜ ⓝ ⓞ ⓟ ⓠ ⓡ ⓢ ⓣ ⓤ ⓥ ⓦ ⓧ ⓨ ⓩ
* <code>
* System.out.println(encloseAlphabetByChar( 'A'));
* System.out.println(encloseAlphabetByChar( 'a'));
* System.out.println(encloseAlphabetByChar( 'z'));
* System.out.println(encloseAlphabetByChar( 'Z'))
* </code>
* @author dazer
* @param letter 字母，不区分大小写，'a'、'b'、'c'、'd'...'x'、'y'、'z'; 'A'、'B'...'Z'
* @date 2021/3/26 18:10
*/
public static String encloseAlphabetByChar(char letter) {
if (!(letter >= 'a' && letter <= 'z' || letter >= 'A' && letter <= 'Z')) {
throw new IllegalArgumentException("number取值范围是[a-z]、[A-Z]的字符");
}
// \u24b6
String start = "Ⓐ";
String hexStr = UnicodeUtil.toUnicode(start).substring(UNICODE_START_CHAR.length());
int difference = letter >= 'a' && letter <= 'z' ? (letter - (int)'a') : (letter - (int)'A');
String hex = new BigInteger(hexStr, 16).add(new BigInteger(String.valueOf(difference), 10)).toString(16);
//
String unicodeStr = UNICODE_START_CHAR + hex;
return UnicodeUtil.toString(unicodeStr);
}
}