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Looly
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package cn.hutool.core.text;
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import java.math.BigInteger;
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/**
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* 符号工具类
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* @author dazer & neusoft
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* @date 2021/3/26 12:21
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* 别名：Symbol or special signal or Special symbols
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* 说明：获取常见的特殊符号，如：带圈数字、
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*
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* {@link UnicodeUtil}
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* @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
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* @link 360百科 https://baike.so.com/doc/5408938-5646935.html
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* @link 百科 https://www.baike.com/wikiid/3469869303298461399?prd=home_search&search_id=5bm572esa2k000&view_id=1takcxx7kjc000
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* @link coolsymbol https://coolsymbol.com/
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* @link 维基百科wikipedia https://en.wikipedia.org/wiki/List_of_Unicode_characters#Unicode_symbols
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*
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* @since 5.6.2
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*/
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public class SpecialSymbolUtil {
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public static final String UNICODE_START_CHAR = "\\u";
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private SpecialSymbolUtil(){}
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/**
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* 获取带圈数字 /封闭式字母数字 ，从1-20,超过1-20报错
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*
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* 0 1 2 3 4 5 6 7 8 9 A B C D E F
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* U+246x ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ ⑬ ⑭ ⑮ ⑯
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* U+247x ⑰ ⑱ ⑲ ⑳ ⑴ ⑵ ⑶ ⑷ ⑸ ⑹ ⑺ ⑻ ⑼ ⑽ ⑾ ⑿
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* U+248x ⒀ ⒁ ⒂ ⒃ ⒄ ⒅ ⒆ ⒇ ⒈ ⒉ ⒊ ⒋ ⒌ ⒍ ⒎ ⒏
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* U+249x ⒐ ⒑ ⒒ ⒓ ⒔ ⒕ ⒖ ⒗ ⒘ ⒙ ⒚ ⒛ ⒜ ⒝ ⒞ ⒟
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* U+24Ax ⒠ ⒡ ⒢ ⒣ ⒤ ⒥ ⒦ ⒧ ⒨ ⒩ ⒪ ⒫ ⒬ ⒭ ⒮ ⒯
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* U+24Bx ⒰ ⒱ ⒲ ⒳ ⒴ ⒵ Ⓐ Ⓑ Ⓒ Ⓓ Ⓔ Ⓕ Ⓖ Ⓗ Ⓘ Ⓙ
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* U+24Cx Ⓚ Ⓛ Ⓜ Ⓝ Ⓞ Ⓟ Ⓠ Ⓡ Ⓢ Ⓣ Ⓤ Ⓥ Ⓦ Ⓧ Ⓨ Ⓩ
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* U+24Dx ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ ⓙ ⓚ ⓛ ⓜ ⓝ ⓞ ⓟ
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* U+24Ex ⓠ ⓡ ⓢ ⓣ ⓤ ⓥ ⓦ ⓧ ⓨ ⓩ ⓪ ⓫ ⓬ ⓭ ⓮ ⓯
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* U+24Fx ⓰ ⓱ ⓲ ⓳ ⓴ ⓵ ⓶ ⓷ ⓸ ⓹ ⓺ ⓻ ⓼ ⓽ ⓾ ⓿
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* @link Unicode_symbols https://en.wikipedia.org/wiki/List_of_Unicode_characters#Unicode_symbols
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* @link Enclosed Alphanumerics https://en.wikipedia.org/wiki/Enclosed_Alphanumerics
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*
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* <code>
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* System.out.println(enclosedAlphanumericsStyle1ByInt(1));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(2));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(3));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(4));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(14));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(18));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(19));
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* System.out.println(enclosedAlphanumericsStyle1ByInt(20));
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* </code>
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*
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* @param number 十进制数字，从1、-->10、11--->20
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* @return ①②③④⑤⑥⑦⑧⑩⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳
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*/
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public static String enclosedNumericsByInt(int number) {
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if (number <= 0 || number > 20) {
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throw new IllegalArgumentException("number取值范围是[1-20]的正整数,包含1和20");
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}
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String start = "①";
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String unicodeStart = UnicodeUtil.toUnicode(start).substring(UNICODE_START_CHAR.length(),
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UnicodeUtil.toUnicode(start).length() - 1);
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// begin: U+246x的24
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String beginHex = unicodeStart.substring(0, 2);
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// U+246x的6
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String middleHex = number >= 17 ? "7" : "6";
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// A
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String endHex = Integer.toHexString(number >= 17 ? number - 17 : number - 1);
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// U + 24 + 60
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String unicodeStr = UNICODE_START_CHAR + beginHex + middleHex + endHex;
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return UnicodeUtil.toString(unicodeStr);
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}
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/**
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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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* 根据字符 获取 Ⓐ Ⓑ Ⓒ Ⓓ Ⓔ Ⓕ Ⓖ Ⓗ Ⓘ Ⓙ Ⓚ Ⓛ Ⓜ Ⓝ Ⓞ Ⓟ Ⓠ Ⓡ Ⓢ Ⓣ Ⓤ Ⓥ Ⓦ Ⓧ Ⓨ Ⓩ ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ ⓙ ⓚ ⓛ ⓜ ⓝ ⓞ ⓟ ⓠ ⓡ ⓢ ⓣ ⓤ ⓥ ⓦ ⓧ ⓨ ⓩ
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* <code>
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* System.out.println(encloseAlphabetByChar( 'A'));
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* System.out.println(encloseAlphabetByChar( 'a'));
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* System.out.println(encloseAlphabetByChar( 'z'));
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* System.out.println(encloseAlphabetByChar( 'Z'))
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* </code>
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* @author dazer
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* @param letter 字母，不区分大小写，'a'、'b'、'c'、'd'...'x'、'y'、'z'; 'A'、'B'...'Z'
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* @date 2021/3/26 18:10
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*/
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public static String encloseAlphabetByChar(char letter) {
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if (!(letter >= 'a' && letter <= 'z' || letter >= 'A' && letter <= 'Z')) {
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throw new IllegalArgumentException("number取值范围是[a-z]、[A-Z]的字符");
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}
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// \u24b6
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String start = "Ⓐ";
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String hexStr = UnicodeUtil.toUnicode(start).substring(UNICODE_START_CHAR.length());
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int difference = letter >= 'a' && letter <= 'z' ? (letter - (int)'a') : (letter - (int)'A');
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String hex = new BigInteger(hexStr, 16).add(new BigInteger(String.valueOf(difference), 10)).toString(16);
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//
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String unicodeStr = UNICODE_START_CHAR + hex;
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return UnicodeUtil.toString(unicodeStr);
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}
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}
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@ -549,6 +549,17 @@ public class ServletUtil {
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* @param response 响应对象{@link HttpServletResponse}
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* @param in 需要返回客户端的内容
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* @param contentType 返回的类型
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* 如：
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* 1、application/pdf、
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* 2、application/vnd.ms-excel、
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* 3、application/msword、
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* 4、application/vnd.ms-powerpoint
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* docx、xlsx 这种 office 2007 格式 设置 MIME;网页里面docx 文件是没问题，但是下载下来了之后就变成doc格式了
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* https://blog.csdn.net/cyh2260629/article/details/73824760
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* 5、MIME_EXCELX_TYPE = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
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* 6、MIME_PPTX_TYPE = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
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* 7、MIME_WORDX_TYPE = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
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* 8、MIME_STREAM_TYPE = "application/octet-stream;charset=utf-8"; #原始字节流
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* @param fileName 文件名
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* @since 4.1.15
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*/
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@ -0,0 +1,30 @@
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package cn.hutool.extra.servlet;
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import org.junit.Test;
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import javax.servlet.http.HttpServletResponse;
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import java.io.ByteArrayInputStream;
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import java.nio.charset.StandardCharsets;
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/**
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* ServletUtil工具类测试
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* @author dazer
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* @date 2021/3/24 15:02
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* @see ServletUtil
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*/
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public class ServletUtilTest {
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@Test
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public void writeTest() {
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HttpServletResponse response = null;
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byte[] bytes = new String("地球是我们共同的家园，需要大家珍惜.").getBytes(StandardCharsets.UTF_8);
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//下载文件
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// 这里没法直接测试，直接写到这里，方便调用；
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if (response != null) {
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String fileName = "签名文件.pdf";
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String contentType = "application/pdf";// application/octet-stream、image/jpeg、image/gif
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response.setCharacterEncoding(StandardCharsets.UTF_8.name()); // 必须设置否则乱码; 但是 safari乱码
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ServletUtil.write(response, new ByteArrayInputStream(bytes), contentType, fileName);
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}
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}
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}
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