HTML编码、HTML解码

╰半橙微兮° 2023-10-07 23:06 46阅读 0赞

Java中可以使用 escapeHtml4编码，unescapeHtml4解码。

StringEscapeUtils.escapeHtml4();//HTML编码
    StringEscapeUtils.unescapeHtml4();//HTML解码

### 完整的 HTML 4 实体参考手册 ###

<table> 
 <tbody> 
  <tr> 
   <th>字符</th> 
   <th>实体</th> 
   <th>十进制</th> 
   <th>十六进制</th> 
   <th>描述</th> 
  </tr> 
  <tr> 
   <td>&amp;</td> 
   <td>&amp;amp;</td> 
   <td>&amp;#38;</td> 
   <td>&amp;#x26;</td> 
   <td>ampersand</td> 
  </tr> 
  <tr> 
   <td>&lt;</td> 
   <td>&amp;lt;</td> 
   <td>&amp;#60;</td> 
   <td>&amp;#x3C;</td> 
   <td>less than</td> 
  </tr> 
  <tr> 
   <td>&gt;</td> 
   <td>&amp;gt;</td> 
   <td>&amp;#62;</td> 
   <td>&amp;#x3E;</td> 
   <td>greater than</td> 
  </tr> 
  <tr> 
   <td></td> 
   <td>&amp;nbsp;</td> 
   <td>&amp;#160;</td> 
   <td>&amp;#xA0;</td> 
   <td>no-break space = non-breaking space</td> 
  </tr> 
  <tr> 
   <td>¡</td> 
   <td>&amp;iexcl;</td> 
   <td>&amp;#161;</td> 
   <td>&amp;#xA1;</td> 
   <td>inverted exclamation mark</td> 
  </tr> 
  <tr> 
   <td>¢</td> 
   <td>&amp;cent;</td> 
   <td>&amp;#162;</td> 
   <td>&amp;#xA2;</td> 
   <td>cent sign</td> 
  </tr> 
  <tr> 
   <td>£</td> 
   <td>&amp;pound;</td> 
   <td>&amp;#163;</td> 
   <td>&amp;#xA3;</td> 
   <td>pound sign</td> 
  </tr> 
  <tr> 
   <td>¤</td> 
   <td>&amp;curren;</td> 
   <td>&amp;#164;</td> 
   <td>&amp;#xA4;</td> 
   <td>currency sign</td> 
  </tr> 
  <tr> 
   <td>¥</td> 
   <td>&amp;yen;</td> 
   <td>&amp;#165;</td> 
   <td>&amp;#xA5;</td> 
   <td>yen sign = yuan sign</td> 
  </tr> 
  <tr> 
   <td>¦</td> 
   <td>&amp;brvbar;</td> 
   <td>&amp;#166;</td> 
   <td>&amp;#xA6;</td> 
   <td>broken bar = broken vertical bar</td> 
  </tr> 
  <tr> 
   <td>§</td> 
   <td>&amp;sect;</td> 
   <td>&amp;#167;</td> 
   <td>&amp;#xA7;</td> 
   <td>section sign</td> 
  </tr> 
  <tr> 
   <td>¨</td> 
   <td>&amp;uml;</td> 
   <td>&amp;#168;</td> 
   <td>&amp;#xA8;</td> 
   <td>diaeresis = spacing diaeresis</td> 
  </tr> 
  <tr> 
   <td>©</td> 
   <td>&amp;copy;</td> 
   <td>&amp;#169;</td> 
   <td>&amp;#xA9;</td> 
   <td>copyright sign</td> 
  </tr> 
  <tr> 
   <td>ª</td> 
   <td>&amp;ordf;</td> 
   <td>&amp;#170;</td> 
   <td>&amp;#xAA;</td> 
   <td>feminine ordinal indicator</td> 
  </tr> 
  <tr> 
   <td>«</td> 
   <td>&amp;laquo;</td> 
   <td>&amp;#171;</td> 
   <td>&amp;#xAB;</td> 
   <td>left-pointing double angle quotation mark = left pointing guillemet</td> 
  </tr> 
  <tr> 
   <td>¬</td> 
   <td>&amp;not;</td> 
   <td>&amp;#172;</td> 
   <td>&amp;#xAC;</td> 
   <td>not sign</td> 
  </tr> 
  <tr> 
   <td></td> 
   <td>&amp;shy;</td> 
   <td>&amp;#173;</td> 
   <td>&amp;#xAD;</td> 
   <td>soft hyphen = discretionary hyphen</td> 
  </tr> 
  <tr> 
   <td>®</td> 
   <td>&amp;reg;</td> 
   <td>&amp;#174;</td> 
   <td>&amp;#xAE;</td> 
   <td>registered sign = registered trade mark sign</td> 
  </tr> 
  <tr> 
   <td>¯</td> 
   <td>&amp;macr;</td> 
   <td>&amp;#175;</td> 
   <td>&amp;#xAF;</td> 
   <td>macron = spacing macron = overline = APL overbar</td> 
  </tr> 
  <tr> 
   <td>°</td> 
   <td>&amp;deg;</td> 
   <td>&amp;#176;</td> 
   <td>&amp;#xB0;</td> 
   <td>degree sign</td> 
  </tr> 
  <tr> 
   <td>±</td> 
   <td>&amp;plusmn;</td> 
   <td>&amp;#177;</td> 
   <td>&amp;#xB1;</td> 
   <td>plus-minus sign = plus-or-minus sign</td> 
  </tr> 
  <tr> 
   <td>²</td> 
   <td>&amp;sup2;</td> 
   <td>&amp;#178;</td> 
   <td>&amp;#xB2;</td> 
   <td>superscript two = superscript digit two = squared</td> 
  </tr> 
  <tr> 
   <td>³</td> 
   <td>&amp;sup3;</td> 
   <td>&amp;#179;</td> 
   <td>&amp;#xB3;</td> 
   <td>superscript three = superscript digit three = cubed</td> 
  </tr> 
  <tr> 
   <td>´</td> 
   <td>&amp;acute;</td> 
   <td>&amp;#180;</td> 
   <td>&amp;#xB4;</td> 
   <td>acute accent = spacing acute</td> 
  </tr> 
  <tr> 
   <td>µ</td> 
   <td>&amp;micro;</td> 
   <td>&amp;#181;</td> 
   <td>&amp;#xB5;</td> 
   <td>micro sign</td> 
  </tr> 
  <tr> 
   <td>¶</td> 
   <td>&amp;para;</td> 
   <td>&amp;#182;</td> 
   <td>&amp;#xB6;</td> 
   <td>pilcrow sign = paragraph sign</td> 
  </tr> 
  <tr> 
   <td>·</td> 
   <td>&amp;middot;</td> 
   <td>&amp;#183;</td> 
   <td>&amp;#xB7;</td> 
   <td>middle dot = Georgian comma = Greek middle dot</td> 
  </tr> 
  <tr> 
   <td>¸</td> 
   <td>&amp;cedil;</td> 
   <td>&amp;#184;</td> 
   <td>&amp;#xB8;</td> 
   <td>cedilla = spacing cedilla</td> 
  </tr> 
  <tr> 
   <td>¹</td> 
   <td>&amp;sup1;</td> 
   <td>&amp;#185;</td> 
   <td>&amp;#xB9;</td> 
   <td>superscript one = superscript digit one</td> 
  </tr> 
  <tr> 
   <td>º</td> 
   <td>&amp;ordm;</td> 
   <td>&amp;#186;</td> 
   <td>&amp;#xBA;</td> 
   <td>masculine ordinal indicator</td> 
  </tr> 
  <tr> 
   <td>»</td> 
   <td>&amp;raquo;</td> 
   <td>&amp;#187;</td> 
   <td>&amp;#xBB;</td> 
   <td>right-pointing double angle quotation mark = right pointing guillemet</td> 
  </tr> 
  <tr> 
   <td>¼</td> 
   <td>&amp;frac14;</td> 
   <td>&amp;#188;</td> 
   <td>&amp;#xBC;</td> 
   <td>vulgar fraction one quarter = fraction one quarter</td> 
  </tr> 
  <tr> 
   <td>½</td> 
   <td>&amp;frac12;</td> 
   <td>&amp;#189;</td> 
   <td>&amp;#xBD;</td> 
   <td>vulgar fraction one half = fraction one half</td> 
  </tr> 
  <tr> 
   <td>¾</td> 
   <td>&amp;frac34;</td> 
   <td>&amp;#190;</td> 
   <td>&amp;#xBE;</td> 
   <td>vulgar fraction three quarters = fraction three quarters</td> 
  </tr> 
  <tr> 
   <td>¿</td> 
   <td>&amp;iquest;</td> 
   <td>&amp;#191;</td> 
   <td>&amp;#xBF;</td> 
   <td>inverted question mark = turned question mark</td> 
  </tr> 
  <tr> 
   <td>À</td> 
   <td>&amp;Agrave;</td> 
   <td>&amp;#192;</td> 
   <td>&amp;#xC0;</td> 
   <td>latin capital letter A with grave = latin capital letter A grave</td> 
  </tr> 
  <tr> 
   <td>Á</td> 
   <td>&amp;Aacute;</td> 
   <td>&amp;#193;</td> 
   <td>&amp;#xC1;</td> 
   <td>latin capital letter A with acute</td> 
  </tr> 
  <tr> 
   <td>Â</td> 
   <td>&amp;Acirc;</td> 
   <td>&amp;#194;</td> 
   <td>&amp;#xC2;</td> 
   <td>latin capital letter A with circumflex</td> 
  </tr> 
  <tr> 
   <td>Ã</td> 
   <td>&amp;Atilde;</td> 
   <td>&amp;#195;</td> 
   <td>&amp;#xC3;</td> 
   <td>latin capital letter A with tilde</td> 
  </tr> 
  <tr> 
   <td>Ä</td> 
   <td>&amp;Auml;</td> 
   <td>&amp;#196;</td> 
   <td>&amp;#xC4;</td> 
   <td>latin capital letter A with diaeresis</td> 
  </tr> 
  <tr> 
   <td>Å</td> 
   <td>&amp;Aring;</td> 
   <td>&amp;#197;</td> 
   <td>&amp;#xC5;</td> 
   <td>latin capital letter A with ring above = latin capital letter A ring</td> 
  </tr> 
  <tr> 
   <td>Æ</td> 
   <td>&amp;AElig;</td> 
   <td>&amp;#198;</td> 
   <td>&amp;#xC6;</td> 
   <td>latin capital letter AE = latin capital ligature AE</td> 
  </tr> 
  <tr> 
   <td>Ç</td> 
   <td>&amp;Ccedil;</td> 
   <td>&amp;#199;</td> 
   <td>&amp;#xC7;</td> 
   <td>latin capital letter C with cedilla</td> 
  </tr> 
  <tr> 
   <td>È</td> 
   <td>&amp;Egrave;</td> 
   <td>&amp;#200;</td> 
   <td>&amp;#xC8;</td> 
   <td>latin capital letter E with grave</td> 
  </tr> 
  <tr> 
   <td>É</td> 
   <td>&amp;Eacute;</td> 
   <td>&amp;#201;</td> 
   <td>&amp;#xC9;</td> 
   <td>latin capital letter E with acute</td> 
  </tr> 
  <tr> 
   <td>Ê</td> 
   <td>&amp;Ecirc;</td> 
   <td>&amp;#202;</td> 
   <td>&amp;#xCA;</td> 
   <td>latin capital letter E with circumflex</td> 
  </tr> 
  <tr> 
   <td>Ë</td> 
   <td>&amp;Euml;</td> 
   <td>&amp;#203;</td> 
   <td>&amp;#xCB;</td> 
   <td>latin capital letter E with diaeresis</td> 
  </tr> 
  <tr> 
   <td>Ì</td> 
   <td>&amp;Igrave;</td> 
   <td>&amp;#204;</td> 
   <td>&amp;#xCC;</td> 
   <td>latin capital letter I with grave</td> 
  </tr> 
  <tr> 
   <td>Í</td> 
   <td>&amp;Iacute;</td> 
   <td>&amp;#205;</td> 
   <td>&amp;#xCD;</td> 
   <td>latin capital letter I with acute</td> 
  </tr> 
  <tr> 
   <td>Î</td> 
   <td>&amp;Icirc;</td> 
   <td>&amp;#206;</td> 
   <td>&amp;#xCE;</td> 
   <td>latin capital letter I with circumflex</td> 
  </tr> 
  <tr> 
   <td>Ï</td> 
   <td>&amp;Iuml;</td> 
   <td>&amp;#207;</td> 
   <td>&amp;#xCF;</td> 
   <td>latin capital letter I with diaeresis</td> 
  </tr> 
  <tr> 
   <td>Ð</td> 
   <td>&amp;ETH;</td> 
   <td>&amp;#208;</td> 
   <td>&amp;#xD0;</td> 
   <td>latin capital letter ETH</td> 
  </tr> 
  <tr> 
   <td>Ñ</td> 
   <td>&amp;Ntilde;</td> 
   <td>&amp;#209;</td> 
   <td>&amp;#xD1;</td> 
   <td>latin capital letter N with tilde</td> 
  </tr> 
  <tr> 
   <td>Ò</td> 
   <td>&amp;Ograve;</td> 
   <td>&amp;#210;</td> 
   <td>&amp;#xD2;</td> 
   <td>latin capital letter O with grave</td> 
  </tr> 
  <tr> 
   <td>Ó</td> 
   <td>&amp;Oacute;</td> 
   <td>&amp;#211;</td> 
   <td>&amp;#xD3;</td> 
   <td>latin capital letter O with acute</td> 
  </tr> 
  <tr> 
   <td>Ô</td> 
   <td>&amp;Ocirc;</td> 
   <td>&amp;#212;</td> 
   <td>&amp;#xD4;</td> 
   <td>latin capital letter O with circumflex</td> 
  </tr> 
  <tr> 
   <td>Õ</td> 
   <td>&amp;Otilde;</td> 
   <td>&amp;#213;</td> 
   <td>&amp;#xD5;</td> 
   <td>latin capital letter O with tilde</td> 
  </tr> 
  <tr> 
   <td>Ö</td> 
   <td>&amp;Ouml;</td> 
   <td>&amp;#214;</td> 
   <td>&amp;#xD6;</td> 
   <td>latin capital letter O with diaeresis</td> 
  </tr> 
  <tr> 
   <td>×</td> 
   <td>&amp;times;</td> 
   <td>&amp;#215;</td> 
   <td>&amp;#xD7;</td> 
   <td>multiplication sign</td> 
  </tr> 
  <tr> 
   <td>Ø</td> 
   <td>&amp;Oslash;</td> 
   <td>&amp;#216;</td> 
   <td>&amp;#xD8;</td> 
   <td>latin capital letter O with stroke = latin capital letter O slash</td> 
  </tr> 
  <tr> 
   <td>Ù</td> 
   <td>&amp;Ugrave;</td> 
   <td>&amp;#217;</td> 
   <td>&amp;#xD9;</td> 
   <td>latin capital letter U with grave</td> 
  </tr> 
  <tr> 
   <td>Ú</td> 
   <td>&amp;Uacute;</td> 
   <td>&amp;#218;</td> 
   <td>&amp;#xDA;</td> 
   <td>latin capital letter U with acute</td> 
  </tr> 
  <tr> 
   <td>Û</td> 
   <td>&amp;Ucirc;</td> 
   <td>&amp;#219;</td> 
   <td>&amp;#xDB;</td> 
   <td>latin capital letter U with circumflex</td> 
  </tr> 
  <tr> 
   <td>Ü</td> 
   <td>&amp;Uuml;</td> 
   <td>&amp;#220;</td> 
   <td>&amp;#xDC;</td> 
   <td>latin capital letter U with diaeresis</td> 
  </tr> 
  <tr> 
   <td>Ý</td> 
   <td>&amp;Yacute;</td> 
   <td>&amp;#221;</td> 
   <td>&amp;#xDD;</td> 
   <td>latin capital letter Y with acute</td> 
  </tr> 
  <tr> 
   <td>Þ</td> 
   <td>&amp;THORN;</td> 
   <td>&amp;#222;</td> 
   <td>&amp;#xDE;</td> 
   <td>latin capital letter THORN</td> 
  </tr> 
  <tr> 
   <td>ß</td> 
   <td>&amp;szlig;</td> 
   <td>&amp;#223;</td> 
   <td>&amp;#xDF;</td> 
   <td>latin small letter sharp s = ess-zed</td> 
  </tr> 
  <tr> 
   <td>à</td> 
   <td>&amp;agrave;</td> 
   <td>&amp;#224;</td> 
   <td>&amp;#xE0;</td> 
   <td>latin small letter a with grave = latin small letter a grave</td> 
  </tr> 
  <tr> 
   <td>á</td> 
   <td>&amp;aacute;</td> 
   <td>&amp;#225;</td> 
   <td>&amp;#xE1;</td> 
   <td>latin small letter a with acute</td> 
  </tr> 
  <tr> 
   <td>â</td> 
   <td>&amp;acirc;</td> 
   <td>&amp;#226;</td> 
   <td>&amp;#xE2;</td> 
   <td>latin small letter a with circumflex</td> 
  </tr> 
  <tr> 
   <td>ã</td> 
   <td>&amp;atilde;</td> 
   <td>&amp;#227;</td> 
   <td>&amp;#xE3;</td> 
   <td>latin small letter a with tilde</td> 
  </tr> 
  <tr> 
   <td>ä</td> 
   <td>&amp;auml;</td> 
   <td>&amp;#228;</td> 
   <td>&amp;#xE4;</td> 
   <td>latin small letter a with diaeresis</td> 
  </tr> 
  <tr> 
   <td>å</td> 
   <td>&amp;aring;</td> 
   <td>&amp;#229;</td> 
   <td>&amp;#xE5;</td> 
   <td>latin small letter a with ring above = latin small letter a ring</td> 
  </tr> 
  <tr> 
   <td>æ</td> 
   <td>&amp;aelig;</td> 
   <td>&amp;#230;</td> 
   <td>&amp;#xE6;</td> 
   <td>latin small letter ae = latin small ligature ae</td> 
  </tr> 
  <tr> 
   <td>ç</td> 
   <td>&amp;ccedil;</td> 
   <td>&amp;#231;</td> 
   <td>&amp;#xE7;</td> 
   <td>latin small letter c with cedilla</td> 
  </tr> 
  <tr> 
   <td>è</td> 
   <td>&amp;egrave;</td> 
   <td>&amp;#232;</td> 
   <td>&amp;#xE8;</td> 
   <td>latin small letter e with grave</td> 
  </tr> 
  <tr> 
   <td>é</td> 
   <td>&amp;eacute;</td> 
   <td>&amp;#233;</td> 
   <td>&amp;#xE9;</td> 
   <td>latin small letter e with acute</td> 
  </tr> 
  <tr> 
   <td>ê</td> 
   <td>&amp;ecirc;</td> 
   <td>&amp;#234;</td> 
   <td>&amp;#xEA;</td> 
   <td>latin small letter e with circumflex</td> 
  </tr> 
  <tr> 
   <td>ë</td> 
   <td>&amp;euml;</td> 
   <td>&amp;#235;</td> 
   <td>&amp;#xEB;</td> 
   <td>latin small letter e with diaeresis</td> 
  </tr> 
  <tr> 
   <td>ì</td> 
   <td>&amp;igrave;</td> 
   <td>&amp;#236;</td> 
   <td>&amp;#xEC;</td> 
   <td>latin small letter i with grave</td> 
  </tr> 
  <tr> 
   <td>í</td> 
   <td>&amp;iacute;</td> 
   <td>&amp;#237;</td> 
   <td>&amp;#xED;</td> 
   <td>latin small letter i with acute</td> 
  </tr> 
  <tr> 
   <td>î</td> 
   <td>&amp;icirc;</td> 
   <td>&amp;#238;</td> 
   <td>&amp;#xEE;</td> 
   <td>latin small letter i with circumflex</td> 
  </tr> 
  <tr> 
   <td>ï</td> 
   <td>&amp;iuml;</td> 
   <td>&amp;#239;</td> 
   <td>&amp;#xEF;</td> 
   <td>latin small letter i with diaeresis</td> 
  </tr> 
  <tr> 
   <td>ð</td> 
   <td>&amp;eth;</td> 
   <td>&amp;#240;</td> 
   <td>&amp;#xF0;</td> 
   <td>latin small letter eth</td> 
  </tr> 
  <tr> 
   <td>ñ</td> 
   <td>&amp;ntilde;</td> 
   <td>&amp;#241;</td> 
   <td>&amp;#xF1;</td> 
   <td>latin small letter n with tilde</td> 
  </tr> 
  <tr> 
   <td>ò</td> 
   <td>&amp;ograve;</td> 
   <td>&amp;#242;</td> 
   <td>&amp;#xF2;</td> 
   <td>latin small letter o with grave</td> 
  </tr> 
  <tr> 
   <td>ó</td> 
   <td>&amp;oacute;</td> 
   <td>&amp;#243;</td> 
   <td>&amp;#xF3;</td> 
   <td>latin small letter o with acute</td> 
  </tr> 
  <tr> 
   <td>ô</td> 
   <td>&amp;ocirc;</td> 
   <td>&amp;#244;</td> 
   <td>&amp;#xF4;</td> 
   <td>latin small letter o with circumflex</td> 
  </tr> 
  <tr> 
   <td>õ</td> 
   <td>&amp;otilde;</td> 
   <td>&amp;#245;</td> 
   <td>&amp;#xF5;</td> 
   <td>latin small letter o with tilde</td> 
  </tr> 
  <tr> 
   <td>ö</td> 
   <td>&amp;ouml;</td> 
   <td>&amp;#246;</td> 
   <td>&amp;#xF6;</td> 
   <td>latin small letter o with diaeresis</td> 
  </tr> 
  <tr> 
   <td>÷</td> 
   <td>&amp;divide;</td> 
   <td>&amp;#247;</td> 
   <td>&amp;#xF7;</td> 
   <td>division sign</td> 
  </tr> 
  <tr> 
   <td>ø</td> 
   <td>&amp;oslash;</td> 
   <td>&amp;#248;</td> 
   <td>&amp;#xF8;</td> 
   <td>latin small letter o with stroke = latin small letter o slash</td> 
  </tr> 
  <tr> 
   <td>ù</td> 
   <td>&amp;ugrave;</td> 
   <td>&amp;#249;</td> 
   <td>&amp;#xF9;</td> 
   <td>latin small letter u with grave</td> 
  </tr> 
  <tr> 
   <td>ú</td> 
   <td>&amp;uacute;</td> 
   <td>&amp;#250;</td> 
   <td>&amp;#xFA;</td> 
   <td>latin small letter u with acute</td> 
  </tr> 
  <tr> 
   <td>û</td> 
   <td>&amp;ucirc;</td> 
   <td>&amp;#251;</td> 
   <td>&amp;#xFB;</td> 
   <td>latin small letter u with circumflex</td> 
  </tr> 
  <tr> 
   <td>ü</td> 
   <td>&amp;uuml;</td> 
   <td>&amp;#252;</td> 
   <td>&amp;#xFC;</td> 
   <td>latin small letter u with diaeresis</td> 
  </tr> 
  <tr> 
   <td>ý</td> 
   <td>&amp;yacute;</td> 
   <td>&amp;#253;</td> 
   <td>&amp;#xFD;</td> 
   <td>latin small letter y with acute</td> 
  </tr> 
  <tr> 
   <td>þ</td> 
   <td>&amp;thorn;</td> 
   <td>&amp;#254;</td> 
   <td>&amp;#xFE;</td> 
   <td>latin small letter thorn</td> 
  </tr> 
  <tr> 
   <td>ÿ</td> 
   <td>&amp;yuml;</td> 
   <td>&amp;#255;</td> 
   <td>&amp;#xFF;</td> 
   <td>latin small letter y with diaeresis</td> 
  </tr> 
  <tr> 
   <td>ƒ</td> 
   <td>&amp;fnof;</td> 
   <td>&amp;#402;</td> 
   <td>&amp;#x192;</td> 
   <td>latin small f with hook = function = florin</td> 
  </tr> 
  <tr> 
   <td>Α</td> 
   <td>&amp;Alpha;</td> 
   <td>&amp;#913;</td> 
   <td>&amp;#x391;</td> 
   <td>greek capital letter alpha</td> 
  </tr> 
  <tr> 
   <td>Β</td> 
   <td>&amp;Beta;</td> 
   <td>&amp;#914;</td> 
   <td>&amp;#x392;</td> 
   <td>greek capital letter beta</td> 
  </tr> 
  <tr> 
   <td>Γ</td> 
   <td>&amp;Gamma;</td> 
   <td>&amp;#915;</td> 
   <td>&amp;#x393;</td> 
   <td>greek capital letter gamma</td> 
  </tr> 
  <tr> 
   <td>Δ</td> 
   <td>&amp;Delta;</td> 
   <td>&amp;#916;</td> 
   <td>&amp;#x394;</td> 
   <td>greek capital letter delta</td> 
  </tr> 
  <tr> 
   <td>Ε</td> 
   <td>&amp;Epsilon;</td> 
   <td>&amp;#917;</td> 
   <td>&amp;#x395;</td> 
   <td>greek capital letter epsilon</td> 
  </tr> 
  <tr> 
   <td>Ζ</td> 
   <td>&amp;Zeta;</td> 
   <td>&amp;#918;</td> 
   <td>&amp;#x396;</td> 
   <td>greek capital letter zeta</td> 
  </tr> 
  <tr> 
   <td>Η</td> 
   <td>&amp;Eta;</td> 
   <td>&amp;#919;</td> 
   <td>&amp;#x397;</td> 
   <td>greek capital letter eta</td> 
  </tr> 
  <tr> 
   <td>Θ</td> 
   <td>&amp;Theta;</td> 
   <td>&amp;#920;</td> 
   <td>&amp;#x398;</td> 
   <td>greek capital letter theta</td> 
  </tr> 
  <tr> 
   <td>Ι</td> 
   <td>&amp;Iota;</td> 
   <td>&amp;#921;</td> 
   <td>&amp;#x399;</td> 
   <td>greek capital letter iota</td> 
  </tr> 
  <tr> 
   <td>Κ</td> 
   <td>&amp;Kappa;</td> 
   <td>&amp;#922;</td> 
   <td>&amp;#x39A;</td> 
   <td>greek capital letter kappa</td> 
  </tr> 
  <tr> 
   <td>Λ</td> 
   <td>&amp;Lambda;</td> 
   <td>&amp;#923;</td> 
   <td>&amp;#x39B;</td> 
   <td>greek capital letter lambda</td> 
  </tr> 
  <tr> 
   <td>Μ</td> 
   <td>&amp;Mu;</td> 
   <td>&amp;#924;</td> 
   <td>&amp;#x39C;</td> 
   <td>greek capital letter mu</td> 
  </tr> 
  <tr> 
   <td>Ν</td> 
   <td>&amp;Nu;</td> 
   <td>&amp;#925;</td> 
   <td>&amp;#x39D;</td> 
   <td>greek capital letter nu</td> 
  </tr> 
  <tr> 
   <td>Ξ</td> 
   <td>&amp;Xi;</td> 
   <td>&amp;#926;</td> 
   <td>&amp;#x39E;</td> 
   <td>greek capital letter xi</td> 
  </tr> 
  <tr> 
   <td>Ο</td> 
   <td>&amp;Omicron;</td> 
   <td>&amp;#927;</td> 
   <td>&amp;#x39F;</td> 
   <td>greek capital letter omicron</td> 
  </tr> 
  <tr> 
   <td>Π</td> 
   <td>&amp;Pi;</td> 
   <td>&amp;#928;</td> 
   <td>&amp;#x3A0;</td> 
   <td>greek capital letter pi</td> 
  </tr> 
  <tr> 
   <td>Ρ</td> 
   <td>&amp;Rho;</td> 
   <td>&amp;#929;</td> 
   <td>&amp;#x3A1;</td> 
   <td>greek capital letter rho</td> 
  </tr> 
  <tr> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td>(not used)</td> 
  </tr> 
  <tr> 
   <td>Σ</td> 
   <td>&amp;Sigma;</td> 
   <td>&amp;#931;</td> 
   <td>&amp;#x3A3;</td> 
   <td>greek capital letter sigma</td> 
  </tr> 
  <tr> 
   <td>Τ</td> 
   <td>&amp;Tau;</td> 
   <td>&amp;#932;</td> 
   <td>&amp;#x3A4;</td> 
   <td>greek capital letter tau</td> 
  </tr> 
  <tr> 
   <td>Υ</td> 
   <td>&amp;Upsilon;</td> 
   <td>&amp;#933;</td> 
   <td>&amp;#x3A5;</td> 
   <td>greek capital letter upsilon</td> 
  </tr> 
  <tr> 
   <td>Φ</td> 
   <td>&amp;Phi;</td> 
   <td>&amp;#934;</td> 
   <td>&amp;#x3A6;</td> 
   <td>greek capital letter phi</td> 
  </tr> 
  <tr> 
   <td>Χ</td> 
   <td>&amp;Chi;</td> 
   <td>&amp;#935;</td> 
   <td>&amp;#x3A7;</td> 
   <td>greek capital letter chi</td> 
  </tr> 
  <tr> 
   <td>Ψ</td> 
   <td>&amp;Psi;</td> 
   <td>&amp;#936;</td> 
   <td>&amp;#x3A8;</td> 
   <td>greek capital letter psi</td> 
  </tr> 
  <tr> 
   <td>Ω</td> 
   <td>&amp;Omega;</td> 
   <td>&amp;#937;</td> 
   <td>&amp;#x3A9;</td> 
   <td>greek capital letter omega</td> 
  </tr> 
  <tr> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td>(not used)</td> 
  </tr> 
  <tr> 
   <td>α</td> 
   <td>&amp;alpha;</td> 
   <td>&amp;#945;</td> 
   <td>&amp;#x3B1;</td> 
   <td>greek smal letter alpha</td> 
  </tr> 
  <tr> 
   <td>β</td> 
   <td>&amp;beta;</td> 
   <td>&amp;#946;</td> 
   <td>&amp;#x3B2;</td> 
   <td>greek smal letter beta</td> 
  </tr> 
  <tr> 
   <td>γ</td> 
   <td>&amp;gamma;</td> 
   <td>&amp;#947;</td> 
   <td>&amp;#x3B3;</td> 
   <td>greek smal letter gamma</td> 
  </tr> 
  <tr> 
   <td>δ</td> 
   <td>&amp;delta;</td> 
   <td>&amp;#948;</td> 
   <td>&amp;#x3B4;</td> 
   <td>greek smal letter delta</td> 
  </tr> 
  <tr> 
   <td>ε</td> 
   <td>&amp;epsilon;</td> 
   <td>&amp;#949;</td> 
   <td>&amp;#x3B5;</td> 
   <td>greek smal letter epsilon</td> 
  </tr> 
  <tr> 
   <td>ζ</td> 
   <td>&amp;zeta;</td> 
   <td>&amp;#950;</td> 
   <td>&amp;#x3B6;</td> 
   <td>greek smal letter zeta</td> 
  </tr> 
  <tr> 
   <td>η</td> 
   <td>&amp;eta;</td> 
   <td>&amp;#951;</td> 
   <td>&amp;#x3B7;</td> 
   <td>greek smal letter eta</td> 
  </tr> 
  <tr> 
   <td>θ</td> 
   <td>&amp;theta;</td> 
   <td>&amp;#952;</td> 
   <td>&amp;#x3B8;</td> 
   <td>greek smal letter theta</td> 
  </tr> 
  <tr> 
   <td>ι</td> 
   <td>&amp;iota;</td> 
   <td>&amp;#953;</td> 
   <td>&amp;#x3B9;</td> 
   <td>greek smal letter iota</td> 
  </tr> 
  <tr> 
   <td>κ</td> 
   <td>&amp;kappa;</td> 
   <td>&amp;#954;</td> 
   <td>&amp;#x3BA;</td> 
   <td>greek smal letter kappa</td> 
  </tr> 
  <tr> 
   <td>λ</td> 
   <td>&amp;lambda;</td> 
   <td>&amp;#955;</td> 
   <td>&amp;#x3BB;</td> 
   <td>greek smal letter lambda</td> 
  </tr> 
  <tr> 
   <td>μ</td> 
   <td>&amp;mu;</td> 
   <td>&amp;#956;</td> 
   <td>&amp;#x3BC;</td> 
   <td>greek smal letter mu</td> 
  </tr> 
  <tr> 
   <td>ν</td> 
   <td>&amp;nu;</td> 
   <td>&amp;#957;</td> 
   <td>&amp;#x3BD;</td> 
   <td>greek smal letter nu</td> 
  </tr> 
  <tr> 
   <td>ξ</td> 
   <td>&amp;xi;</td> 
   <td>&amp;#958;</td> 
   <td>&amp;#x3BE;</td> 
   <td>greek smal letter xi</td> 
  </tr> 
  <tr> 
   <td>ο</td> 
   <td>&amp;omicron;</td> 
   <td>&amp;#959;</td> 
   <td>&amp;#x3BF;</td> 
   <td>greek smal letter omicron</td> 
  </tr> 
  <tr> 
   <td>π</td> 
   <td>&amp;pi;</td> 
   <td>&amp;#960;</td> 
   <td>&amp;#x3C0;</td> 
   <td>greek smal letter pi</td> 
  </tr> 
  <tr> 
   <td>ρ</td> 
   <td>&amp;rho;</td> 
   <td>&amp;#961;</td> 
   <td>&amp;#x3C1;</td> 
   <td>greek smal letter rho</td> 
  </tr> 
  <tr> 
   <td>ς</td> 
   <td>&amp;sigmaf;</td> 
   <td>&amp;#962;</td> 
   <td>&amp;#x3C2;</td> 
   <td>greek smal letter final sigma</td> 
  </tr> 
  <tr> 
   <td>σ</td> 
   <td>&amp;sigma;</td> 
   <td>&amp;#963;</td> 
   <td>&amp;#x3C3;</td> 
   <td>greek smal letter sigma</td> 
  </tr> 
  <tr> 
   <td>τ</td> 
   <td>&amp;tau;</td> 
   <td>&amp;#964;</td> 
   <td>&amp;#x3C4;</td> 
   <td>greek smal letter tau</td> 
  </tr> 
  <tr> 
   <td>υ</td> 
   <td>&amp;upsilon;</td> 
   <td>&amp;#965;</td> 
   <td>&amp;#x3C5;</td> 
   <td>greek smal letter upsilon</td> 
  </tr> 
  <tr> 
   <td>φ</td> 
   <td>&amp;phi;</td> 
   <td>&amp;#966;</td> 
   <td>&amp;#x3C6;</td> 
   <td>greek smal letter phi</td> 
  </tr> 
  <tr> 
   <td>χ</td> 
   <td>&amp;chi;</td> 
   <td>&amp;#967;</td> 
   <td>&amp;#x3C7;</td> 
   <td>greek smal letter chi</td> 
  </tr> 
  <tr> 
   <td>ψ</td> 
   <td>&amp;psi;</td> 
   <td>&amp;#968;</td> 
   <td>&amp;#x3C8;</td> 
   <td>greek smal letter psi</td> 
  </tr> 
  <tr> 
   <td>ω</td> 
   <td>&amp;omega;</td> 
   <td>&amp;#969;</td> 
   <td>&amp;#x3C9;</td> 
   <td>greek smal letter omega</td> 
  </tr> 
  <tr> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td>(not used)</td> 
  </tr> 
  <tr> 
   <td>ϑ</td> 
   <td>&amp;thetasym;</td> 
   <td>&amp;#977;</td> 
   <td>&amp;#x3D1;</td> 
   <td>greek smal letter theta symbol</td> 
  </tr> 
  <tr> 
   <td>ϒ</td> 
   <td>&amp;upsih;</td> 
   <td>&amp;#978;</td> 
   <td>&amp;#x3D2;</td> 
   <td>Greek upsilon with hook symbol</td> 
  </tr> 
  <tr> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td></td> 
   <td>(not used)</td> 
  </tr> 
  <tr> 
   <td>ϖ</td> 
   <td>&amp;piv;</td> 
   <td>&amp;#982;</td> 
   <td>&amp;#x3D6;</td> 
   <td>Greek pi symbol</td> 
  </tr> 
 </tbody> 
</table>

### 特殊符号 ###

<table> 
 <tbody> 
  <tr> 
   <th>字符</th> 
   <th>实体</th> 
   <th>十进制</th> 
   <th>十六进制</th> 
   <th>描述</th> 
  </tr> 
  <tr> 
   <td>•</td> 
   <td>&amp;bull;</td> 
   <td>&amp;#8226;</td> 
   <td>&amp;#x2022;</td> 
   <td>bullet = black small circle</td> 
  </tr> 
  <tr> 
   <td>…</td> 
   <td>&amp;hellip;</td> 
   <td>&amp;#8230;</td> 
   <td>&amp;#x2026;</td> 
   <td>horizontal ellipsis = three dot leader</td> 
  </tr> 
  <tr> 
   <td>′</td> 
   <td>&amp;prime;</td> 
   <td>&amp;#8242;</td> 
   <td>&amp;#x2032;</td> 
   <td>prime = minutes = feet</td> 
  </tr> 
  <tr> 
   <td>″</td> 
   <td>&amp;Prime;</td> 
   <td>&amp;#8243;</td> 
   <td>&amp;#x2033;</td> 
   <td>double prime = seconds = inches</td> 
  </tr> 
  <tr> 
   <td>‾</td> 
   <td>&amp;oline;</td> 
   <td>&amp;#8254;</td> 
   <td>&amp;#x203E;</td> 
   <td>overline = spacing overscore</td> 
  </tr> 
  <tr> 
   <td>⁄</td> 
   <td>&amp;frasl;</td> 
   <td>&amp;#8260;</td> 
   <td>&amp;#x2044;</td> 
   <td>fraction slash</td> 
  </tr> 
  <tr> 
   <td>℘</td> 
   <td>&amp;weierp;</td> 
   <td>&amp;#8472;</td> 
   <td>&amp;#x2118;</td> 
   <td>script capital P = power set = Weierstrass p</td> 
  </tr> 
  <tr> 
   <td>ℑ</td> 
   <td>&amp;image;</td> 
   <td>&amp;#8465;</td> 
   <td>&amp;#x2111;</td> 
   <td>blackletter capital I = imaginary part</td> 
  </tr> 
  <tr> 
   <td>ℜ</td> 
   <td>&amp;real;</td> 
   <td>&amp;#8476;</td> 
   <td>&amp;#x211C;</td> 
   <td>blackletter capital R = real part symbol</td> 
  </tr> 
  <tr> 
   <td>™</td> 
   <td>&amp;trade;</td> 
   <td>&amp;#8482;</td> 
   <td>&amp;#x2122;</td> 
   <td>trade mark sign</td> 
  </tr> 
  <tr> 
   <td>ℵ</td> 
   <td>&amp;alefsym;</td> 
   <td>&amp;#8501;</td> 
   <td>&amp;#x2135;</td> 
   <td>alef symbol = first transfinite cardinal</td> 
  </tr> 
  <tr> 
   <td>←</td> 
   <td>&amp;larr;</td> 
   <td>&amp;#8592;</td> 
   <td>&amp;#x2190;</td> 
   <td>leftwards arrow</td> 
  </tr> 
  <tr> 
   <td>↑</td> 
   <td>&amp;uarr;</td> 
   <td>&amp;#8593;</td> 
   <td>&amp;#x2191;</td> 
   <td>upwards arrow</td> 
  </tr> 
  <tr> 
   <td>→</td> 
   <td>&amp;rarr;</td> 
   <td>&amp;#8594;</td> 
   <td>&amp;#x2192;</td> 
   <td>rightwards arrow</td> 
  </tr> 
  <tr> 
   <td>↓</td> 
   <td>&amp;darr;</td> 
   <td>&amp;#8595;</td> 
   <td>&amp;#x2193;</td> 
   <td>downwards arrow</td> 
  </tr> 
  <tr> 
   <td>↔</td> 
   <td>&amp;harr;</td> 
   <td>&amp;#8596;</td> 
   <td>&amp;#x2194;</td> 
   <td>left right arrow</td> 
  </tr> 
  <tr> 
   <td>↵</td> 
   <td>&amp;crarr;</td> 
   <td>&amp;#8629;</td> 
   <td>&amp;#x21B5;</td> 
   <td>downwards arrow with corner leftwards = carriage return</td> 
  </tr> 
  <tr> 
   <td>⇐</td> 
   <td>&amp;lArr;</td> 
   <td>&amp;#8656;</td> 
   <td>&amp;#x21D0;</td> 
   <td>leftwards double arrow</td> 
  </tr> 
  <tr> 
   <td>⇑</td> 
   <td>&amp;uArr;</td> 
   <td>&amp;#8657;</td> 
   <td>&amp;#x21D1;</td> 
   <td>upwards double arrow</td> 
  </tr> 
  <tr> 
   <td>⇒</td> 
   <td>&amp;rArr;</td> 
   <td>&amp;#8658;</td> 
   <td>&amp;#x21D2;</td> 
   <td>rightwards double arrow</td> 
  </tr> 
  <tr> 
   <td>⇓</td> 
   <td>&amp;dArr;</td> 
   <td>&amp;#8659;</td> 
   <td>&amp;#x21D3;</td> 
   <td>downwards double arrow</td> 
  </tr> 
  <tr> 
   <td>⇔</td> 
   <td>&amp;hArr;</td> 
   <td>&amp;#8660;</td> 
   <td>&amp;#x21D4;</td> 
   <td>left right double arrow</td> 
  </tr> 
  <tr> 
   <td>∀</td> 
   <td>&amp;forall;</td> 
   <td>&amp;#8704;</td> 
   <td>&amp;#x2200;</td> 
   <td>for all</td> 
  </tr> 
  <tr> 
   <td>∂</td> 
   <td>&amp;part;</td> 
   <td>&amp;#8706;</td> 
   <td>&amp;#x2202;</td> 
   <td>partial differential</td> 
  </tr> 
  <tr> 
   <td>∃</td> 
   <td>&amp;exist;</td> 
   <td>&amp;#8707;</td> 
   <td>&amp;#x2203;</td> 
   <td>there exists</td> 
  </tr> 
  <tr> 
   <td>∅</td> 
   <td>&amp;empty;</td> 
   <td>&amp;#8709;</td> 
   <td>&amp;#x2205;</td> 
   <td>empty set = null set = diameter</td> 
  </tr> 
  <tr> 
   <td>∇</td> 
   <td>&amp;nabla;</td> 
   <td>&amp;#8711;</td> 
   <td>&amp;#x2207;</td> 
   <td>nabla = backward difference</td> 
  </tr> 
  <tr> 
   <td>∈</td> 
   <td>&amp;isin;</td> 
   <td>&amp;#8712;</td> 
   <td>&amp;#x2208;</td> 
   <td>element of</td> 
  </tr> 
  <tr> 
   <td>∉</td> 
   <td>&amp;notin;</td> 
   <td>&amp;#8713;</td> 
   <td>&amp;#x2209;</td> 
   <td>not an element of</td> 
  </tr> 
  <tr> 
   <td>∋</td> 
   <td>&amp;ni;</td> 
   <td>&amp;#8715;</td> 
   <td>&amp;#x220B;</td> 
   <td>contains as member</td> 
  </tr> 
  <tr> 
   <td>∏</td> 
   <td>&amp;prod;</td> 
   <td>&amp;#8719;</td> 
   <td>&amp;#x220F;</td> 
   <td>n-ary product = product sign</td> 
  </tr> 
  <tr> 
   <td>∑</td> 
   <td>&amp;sum;</td> 
   <td>&amp;#8721;</td> 
   <td>&amp;#x2211;</td> 
   <td>n-ary sumation</td> 
  </tr> 
  <tr> 
   <td>−</td> 
   <td>&amp;minus;</td> 
   <td>&amp;#8722;</td> 
   <td>&amp;#x2212;</td> 
   <td>minus sign</td> 
  </tr> 
  <tr> 
   <td>∗</td> 
   <td>&amp;lowast;</td> 
   <td>&amp;#8727;</td> 
   <td>&amp;#x2217;</td> 
   <td>asterisk operator</td> 
  </tr> 
  <tr> 
   <td>√</td> 
   <td>&amp;radic;</td> 
   <td>&amp;#8730;</td> 
   <td>&amp;#x221A;</td> 
   <td>square root = radical sign</td> 
  </tr> 
  <tr> 
   <td>∝</td> 
   <td>&amp;prop;</td> 
   <td>&amp;#8733;</td> 
   <td>&amp;#x221D;</td> 
   <td>proportional to</td> 
  </tr> 
  <tr> 
   <td>∞</td> 
   <td>&amp;infin;</td> 
   <td>&amp;#8734;</td> 
   <td>&amp;#x221E;</td> 
   <td>infinity</td> 
  </tr> 
  <tr> 
   <td>∠</td> 
   <td>&amp;ang;</td> 
   <td>&amp;#8736;</td> 
   <td>&amp;#x2220;</td> 
   <td>angle</td> 
  </tr> 
  <tr> 
   <td>∧</td> 
   <td>&amp;and;</td> 
   <td>&amp;#8743;</td> 
   <td>&amp;#x2227;</td> 
   <td>logical and = wedge</td> 
  </tr> 
  <tr> 
   <td>∨</td> 
   <td>&amp;or;</td> 
   <td>&amp;#8744;</td> 
   <td>&amp;#x2228;</td> 
   <td>logical or = vee</td> 
  </tr> 
  <tr> 
   <td>∩</td> 
   <td>&amp;cap;</td> 
   <td>&amp;#8745;</td> 
   <td>&amp;#x2229;</td> 
   <td>intersection = cap</td> 
  </tr> 
  <tr> 
   <td>∪</td> 
   <td>&amp;cup;</td> 
   <td>&amp;#8746;</td> 
   <td>&amp;#x222A;</td> 
   <td>union = cup</td> 
  </tr> 
  <tr> 
   <td>∫</td> 
   <td>&amp;int;</td> 
   <td>&amp;#8747;</td> 
   <td>&amp;#x222B;</td> 
   <td>integral</td> 
  </tr> 
  <tr> 
   <td>∴</td> 
   <td>&amp;there4;</td> 
   <td>&amp;#8756;</td> 
   <td>&amp;#x2234;</td> 
   <td>therefore</td> 
  </tr> 
  <tr> 
   <td>∼</td> 
   <td>&amp;sim;</td> 
   <td>&amp;#8764;</td> 
   <td>&amp;#x223C;</td> 
   <td>tilde operator = varies with = similar to</td> 
  </tr> 
  <tr> 
   <td>≅</td> 
   <td>&amp;cong;</td> 
   <td>&amp;#8773;</td> 
   <td>&amp;#x2245;</td> 
   <td>approximately equal to</td> 
  </tr> 
  <tr> 
   <td>≈</td> 
   <td>&amp;asymp;</td> 
   <td>&amp;#8776;</td> 
   <td>&amp;#x2248;</td> 
   <td>almost equal to = asymptotic to</td> 
  </tr> 
  <tr> 
   <td>≠</td> 
   <td>&amp;ne;</td> 
   <td>&amp;#8800;</td> 
   <td>&amp;#x2260;</td> 
   <td>not equal to</td> 
  </tr> 
  <tr> 
   <td>≡</td> 
   <td>&amp;equiv;</td> 
   <td>&amp;#8801;</td> 
   <td>&amp;#x2261;</td> 
   <td>identical to</td> 
  </tr> 
  <tr> 
   <td>≤</td> 
   <td>&amp;le;</td> 
   <td>&amp;#8804;</td> 
   <td>&amp;#x2264;</td> 
   <td>less-than or equal to</td> 
  </tr> 
  <tr> 
   <td>≥</td> 
   <td>&amp;ge;</td> 
   <td>&amp;#8805;</td> 
   <td>&amp;#x2265;</td> 
   <td>greater-than or equal to</td> 
  </tr> 
  <tr> 
   <td>⊂</td> 
   <td>&amp;sub;</td> 
   <td>&amp;#8834;</td> 
   <td>&amp;#x2282;</td> 
   <td>subset of</td> 
  </tr> 
  <tr> 
   <td>⊃</td> 
   <td>&amp;sup;</td> 
   <td>&amp;#8835;</td> 
   <td>&amp;#x2283;</td> 
   <td>superset of</td> 
  </tr> 
  <tr> 
   <td>⊄</td> 
   <td>&amp;nsub;</td> 
   <td>&amp;#8836;</td> 
   <td>&amp;#x2284;</td> 
   <td>not a subset of</td> 
  </tr> 
  <tr> 
   <td>⊆</td> 
   <td>&amp;sube;</td> 
   <td>&amp;#8838;</td> 
   <td>&amp;#x2286;</td> 
   <td>subset of or equal to</td> 
  </tr> 
  <tr> 
   <td>⊇</td> 
   <td>&amp;supe;</td> 
   <td>&amp;#8839;</td> 
   <td>&amp;#x2287;</td> 
   <td>superset of or equal to</td> 
  </tr> 
  <tr> 
   <td>⊕</td> 
   <td>&amp;oplus;</td> 
   <td>&amp;#8853;</td> 
   <td>&amp;#x2295;</td> 
   <td>circled plus = direct sum</td> 
  </tr> 
  <tr> 
   <td>⊗</td> 
   <td>&amp;otimes;</td> 
   <td>&amp;#8855;</td> 
   <td>&amp;#x2297;</td> 
   <td>circled times = vector product</td> 
  </tr> 
  <tr> 
   <td>⊥</td> 
   <td>&amp;perp;</td> 
   <td>&amp;#8869;</td> 
   <td>&amp;#x22A5;</td> 
   <td>up tack = orthogonal to = perpendicular</td> 
  </tr> 
  <tr> 
   <td>⋅</td> 
   <td>&amp;sdot;</td> 
   <td>&amp;#8901;</td> 
   <td>&amp;#x22C5;</td> 
   <td>dot operator</td> 
  </tr> 
  <tr> 
   <td>⌈</td> 
   <td>&amp;lceil;</td> 
   <td>&amp;#8968;</td> 
   <td>&amp;#x2308;</td> 
   <td>left ceiling = APL upstile</td> 
  </tr> 
  <tr> 
   <td>⌉</td> 
   <td>&amp;rceil;</td> 
   <td>&amp;#8969;</td> 
   <td>&amp;#x2309;</td> 
   <td>right ceiling</td> 
  </tr> 
  <tr> 
   <td>⌊</td> 
   <td>&amp;lfloor;</td> 
   <td>&amp;#8970;</td> 
   <td>&amp;#x230A;</td> 
   <td>left floor = APL downstile</td> 
  </tr> 
  <tr> 
   <td>⌋</td> 
   <td>&amp;rfloor;</td> 
   <td>&amp;#8971;</td> 
   <td>&amp;#x230B;</td> 
   <td>right floor</td> 
  </tr> 
  <tr> 
   <td>〈</td> 
   <td>&amp;lang;</td> 
   <td>&amp;#9001;</td> 
   <td>&amp;#x2329;</td> 
   <td>left-pointing angle bracket = bra</td> 
  </tr> 
  <tr> 
   <td>〉</td> 
   <td>&amp;rang;</td> 
   <td>&amp;#9002;</td> 
   <td>&amp;#x232A;</td> 
   <td>right-pointing angle bracket = ket</td> 
  </tr> 
  <tr> 
   <td>◊</td> 
   <td>&amp;loz;</td> 
   <td>&amp;#9674;</td> 
   <td>&amp;#x25CA;</td> 
   <td>lozenge</td> 
  </tr> 
  <tr> 
   <td>♠</td> 
   <td>&amp;spades;</td> 
   <td>&amp;#9824;</td> 
   <td>&amp;#x2660;</td> 
   <td>black spade suit</td> 
  </tr> 
  <tr> 
   <td>♣</td> 
   <td>&amp;clubs;</td> 
   <td>&amp;#9827;</td> 
   <td>&amp;#x2663;</td> 
   <td>black club suit = shamrock</td> 
  </tr> 
  <tr> 
   <td>♥</td> 
   <td>&amp;hearts;</td> 
   <td>&amp;#9829;</td> 
   <td>&amp;#x2665;</td> 
   <td>black heart suit = valentine</td> 
  </tr> 
  <tr> 
   <td>♦</td> 
   <td>&amp;diams;</td> 
   <td>&amp;#9830;</td> 
   <td>&amp;#x2666;</td> 
   <td>black diamond suit</td> 
  </tr> 
 </tbody> 
</table>

参考：

[https://www.w3school.com.cn/charsets/ref\_html\_entities\_4.asp][https_www.w3school.com.cn_charsets_ref_html_entities_4.asp]

[HTML 字符集][HTML]

[https_www.w3school.com.cn_charsets_ref_html_entities_4.asp]: https://www.w3school.com.cn/charsets/ref_html_entities_4.asp
[HTML]: https://www.w3school.com.cn/charsets/index.asp