小编给大家分享一下html转义字符怎么通过代码识别,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!偶尔会在数据中看到诸如’ 这样的字符,特征如下
以开头,中间是一串数字,以;结尾
以&开头,中间一串字符,以;结尾
比如最常见的或者等价的
浏览器遇到这些转义符,会转义回来,但如何通过代码识别? org.apache.commons.lang.StringEscapeUtils.unescapeHtml提供了很好的说明
遇到上面的第一种情况,中间是数字的,直接将数字(unicode)转为char
遇到第二情况,中间是字符,只能查映射表了,从映射表中找到字符对应的数字再转换为char 看看代码就一目了然了
看看HTML40如何定义的
static {
HTML40 = new Entities();
fillWithHtml40Entities(HTML40);
}
static void fillWithHtml40Entities(Entities entities) {
entities.addEntities(BASIC_ARRAY);
entities.addEntities(ISO8859_1_ARRAY);
entities.addEntities(HTML40_ARRAY);
}
再看看BASIC_ARRAY、ISO8859_1_ARRAY、HTML40_ARRAY 分别是什么
BASIC_ARRAY
private static final String[][] BASIC_ARRAY = {{“quot”, “34”}, // ” – double-quote
{“amp”, “38”}, // & – ampersand
{“lt”, “60”}, // {“gt”, “62”}, // > – greater-than
};
ISO8859_1_ARRAY
static final String[][] ISO8859_1_ARRAY = {{“nbsp”, “160”}, // non-breaking space
{“iexcl”, “161”}, // inverted exclamation mark
{“cent”, “162”}, // cent sign
{“pound”, “163”}, // pound sign
{“curren”, “164”}, // currency sign
{“yen”, “165”}, // yen sign = yuan sign
{“brvbar”, “166”}, // broken bar = broken vertical bar
{“sect”, “167”}, // section sign
{“uml”, “168”}, // diaeresis = spacing diaeresis
{“copy”, “169”}, // � – copyright sign
{“ordf”, “170”}, // feminine ordinal indicator
{“laquo”, “171”}, // left-pointing double angle quotation mark = left pointing guillemet
{“not”, “172”}, // not sign
{“shy”, “173”}, // soft hyphen = discretionary hyphen
{“reg”, “174”}, // � – registered trademark sign
{“macr”, “175”}, // macron = spacing macron = overline = APL overbar
{“deg”, “176”}, // degree sign
{“plusmn”, “177”}, // plus-minus sign = plus-or-minus sign
{“sup2”, “178”}, // superscript two = superscript digit two = squared
{“sup3”, “179”}, // superscript three = superscript digit three = cubed
{“acute”, “180”}, // acute accent = spacing acute
{“micro”, “181”}, // micro sign
{“para”, “182”}, // pilcrow sign = paragraph sign
{“middot”, “183”}, // middle dot = Georgian comma = Greek middle dot
{“cedil”, “184”}, // cedilla = spacing cedilla
{“sup1”, “185”}, // superscript one = superscript digit one
{“ordm”, “186”}, // masculine ordinal indicator
{“raquo”, “187”}, // right-pointing double angle quotation mark = right pointing guillemet
{“frac14”, “188”}, // vulgar fraction one quarter = fraction one quarter
{“frac12”, “189”}, // vulgar fraction one half = fraction one half
{“frac34”, “190”}, // vulgar fraction three quarters = fraction three quarters
{“iquest”, “191”}, // inverted question mark = turned question mark
{“Agrave”, “192”}, // � – uppercase A, grave accent
{“Aacute”, “193”}, // � – uppercase A, acute accent
{“Acirc”, “194”}, // � – uppercase A, circumflex accent
{“Atilde”, “195”}, // � – uppercase A, tilde
{“Auml”, “196”}, // � – uppercase A, umlaut
{“Aring”, “197”}, // � – uppercase A, ring
{“AElig”, “198”}, // � – uppercase AE
{“Ccedil”, “199”}, // � – uppercase C, cedilla
{“Egrave”, “200”}, // � – uppercase E, grave accent
{“Eacute”, “201”}, // � – uppercase E, acute accent
{“Ecirc”, “202”}, // � – uppercase E, circumflex accent
{“Euml”, “203”}, // � – uppercase E, umlaut
{“Igrave”, “204”}, // � – uppercase I, grave accent
{“Iacute”, “205”}, // � – uppercase I, acute accent
{“Icirc”, “206”}, // � – uppercase I, circumflex accent
{“Iuml”, “207”}, // � – uppercase I, umlaut
{“ETH”, “208”}, // � – uppercase Eth, Icelandic
{“Ntilde”, “209”}, // � – uppercase N, tilde
{“Ograve”, “210”}, // � – uppercase O, grave accent
{“Oacute”, “211”}, // � – uppercase O, acute accent
{“Ocirc”, “212”}, // � – uppercase O, circumflex accent
{“Otilde”, “213”}, // � – uppercase O, tilde
{“Ouml”, “214”}, // � – uppercase O, umlaut
{“times”, “215”}, // multiplication sign
{“Oslash”, “216”}, // � – uppercase O, slash
{“Ugrave”, “217”}, // � – uppercase U, grave accent
{“Uacute”, “218”}, // � – uppercase U, acute accent
{“Ucirc”, “219”}, // � – uppercase U, circumflex accent
{“Uuml”, “220”}, // � – uppercase U, umlaut
{“Yacute”, “221”}, // � – uppercase Y, acute accent
{“THORN”, “222”}, // � – uppercase THORN, Icelandic
{“szlig”, “223”}, // � – lowercase sharps, German
{“agrave”, “224”}, // � – lowercase a, grave accent
{“aacute”, “225”}, // � – lowercase a, acute accent
{“acirc”, “226”}, // � – lowercase a, circumflex accent
{“atilde”, “227”}, // � – lowercase a, tilde
{“auml”, “228”}, // � – lowercase a, umlaut
{“aring”, “229”}, // � – lowercase a, ring
{“aelig”, “230”}, // � – lowercase ae
{“ccedil”, “231”}, // � – lowercase c, cedilla
{“egrave”, “232”}, // � – lowercase e, grave accent
{“eacute”, “233”}, // � – lowercase e, acute accent
{“ecirc”, “234”}, // � – lowercase e, circumflex accent
{“euml”, “235”}, // � – lowercase e, umlaut
{“igrave”, “236”}, // � – lowercase i, grave accent
{“iacute”, “237”}, // � – lowercase i, acute accent
{“icirc”, “238”}, // � – lowercase i, circumflex accent
{“iuml”, “239”}, // � – lowercase i, umlaut
{“eth”, “240”}, // � – lowercase eth, Icelandic
{“ntilde”, “241”}, // � – lowercase n, tilde
{“ograve”, “242”}, // � – lowercase o, grave accent
{“oacute”, “243”}, // � – lowercase o, acute accent
{“ocirc”, “244”}, // � – lowercase o, circumflex accent
{“otilde”, “245”}, // � – lowercase o, tilde
{“ouml”, “246”}, // � – lowercase o, umlaut
{“divide”, “247”}, // division sign
{“oslash”, “248”}, // � – lowercase o, slash
{“ugrave”, “249”}, // � – lowercase u, grave accent
{“uacute”, “250”}, // � – lowercase u, acute accent
{“ucirc”, “251”}, // � – lowercase u, circumflex accent
{“uuml”, “252”}, // � – lowercase u, umlaut
{“yacute”, “253”}, // � – lowercase y, acute accent
{“thorn”, “254”}, // � – lowercase thorn, Icelandic
{“yuml”, “255”}, // � – lowercase y, umlaut
};
HTML40_ARRAY
static final String[][] HTML40_ARRAY = {
//
{“fnof”, “402”}, // latin small f with hook = function= florin, U+0192 ISOtech –>
//
{“Alpha”, “913”}, // greek capital letter alpha, U+0391 –>
{“Beta”, “914”}, // greek capital letter beta, U+0392 –>
{“Gamma”, “915”}, // greek capital letter gamma,U+0393 ISOgrk3 –>
{“Delta”, “916”}, // greek capital letter delta,U+0394 ISOgrk3 –>
{“Epsilon”, “917”}, // greek capital letter epsilon, U+0395 –>
{“Zeta”, “918”}, // greek capital letter zeta, U+0396 –>
{“Eta”, “919”}, // greek capital letter eta, U+0397 –>
{“Theta”, “920”}, // greek capital letter theta,U+0398 ISOgrk3 –>
{“Iota”, “921”}, // greek capital letter iota, U+0399 –>
{“Kappa”, “922”}, // greek capital letter kappa, U+039A –>
{“Lambda”, “923”}, // greek capital letter lambda,U+039B ISOgrk3 –>
{“Mu”, “924”}, // greek capital letter mu, U+039C –>
{“Nu”, “925”}, // greek capital letter nu, U+039D –>
{“Xi”, “926”}, // greek capital letter xi, U+039E ISOgrk3 –>
{“Omicron”, “927”}, // greek capital letter omicron, U+039F –>
{“Pi”, “928”}, // greek capital letter pi, U+03A0 ISOgrk3 –>
{“Rho”, “929”}, // greek capital letter rho, U+03A1 –>
//
{“Sigma”, “931”}, // greek capital letter sigma,U+03A3 ISOgrk3 –>
{“Tau”, “932”}, // greek capital letter tau, U+03A4 –>
{“Upsilon”, “933”}, // greek capital letter upsilon,U+03A5 ISOgrk3 –>
{“Phi”, “934”}, // greek capital letter phi,U+03A6 ISOgrk3 –>
{“Chi”, “935”}, // greek capital letter chi, U+03A7 –>
{“Psi”, “936”}, // greek capital letter psi,U+03A8 ISOgrk3 –>
{“Omega”, “937”}, // greek capital letter omega,U+03A9 ISOgrk3 –>
{“alpha”, “945”}, // greek small letter alpha,U+03B1 ISOgrk3 –>
{“beta”, “946”}, // greek small letter beta, U+03B2 ISOgrk3 –>
{“gamma”, “947”}, // greek small letter gamma,U+03B3 ISOgrk3 –>
{“delta”, “948”}, // greek small letter delta,U+03B4 ISOgrk3 –>
{“epsilon”, “949”}, // greek small letter epsilon,U+03B5 ISOgrk3 –>
{“zeta”, “950”}, // greek small letter zeta, U+03B6 ISOgrk3 –>
{“eta”, “951”}, // greek small letter eta, U+03B7 ISOgrk3 –>
{“theta”, “952”}, // greek small letter theta,U+03B8 ISOgrk3 –>
{“iota”, “953”}, // greek small letter iota, U+03B9 ISOgrk3 –>
{“kappa”, “954”}, // greek small letter kappa,U+03BA ISOgrk3 –>
{“lambda”, “955”}, // greek small letter lambda,U+03BB ISOgrk3 –>
{“mu”, “956”}, // greek small letter mu, U+03BC ISOgrk3 –>
{“nu”, “957”}, // greek small letter nu, U+03BD ISOgrk3 –>
{“xi”, “958”}, // greek small letter xi, U+03BE ISOgrk3 –>
{“omicron”, “959”}, // greek small letter omicron, U+03BF NEW –>
{“pi”, “960”}, // greek small letter pi, U+03C0 ISOgrk3 –>
{“rho”, “961”}, // greek small letter rho, U+03C1 ISOgrk3 –>
{“sigmaf”, “962”}, // greek small letter final sigma,U+03C2 ISOgrk3 –>
{“sigma”, “963”}, // greek small letter sigma,U+03C3 ISOgrk3 –>
{“tau”, “964”}, // greek small letter tau, U+03C4 ISOgrk3 –>
{“upsilon”, “965”}, // greek small letter upsilon,U+03C5 ISOgrk3 –>
{“phi”, “966”}, // greek small letter phi, U+03C6 ISOgrk3 –>
{“chi”, “967”}, // greek small letter chi, U+03C7 ISOgrk3 –>
{“psi”, “968”}, // greek small letter psi, U+03C8 ISOgrk3 –>
{“omega”, “969”}, // greek small letter omega,U+03C9 ISOgrk3 –>
{“thetasym”, “977”}, // greek small letter theta symbol,U+03D1 NEW –>
{“upsih”, “978”}, // greek upsilon with hook symbol,U+03D2 NEW –>
{“piv”, “982”}, // greek pi symbol, U+03D6 ISOgrk3 –>
//
{“bull”, “8226”}, // bullet = black small circle,U+2022 ISOpub –>
//
{“hellip”, “8230”}, // horizontal ellipsis = three dot leader,U+2026 ISOpub –>
{“prime”, “8242”}, // prime = minutes = feet, U+2032 ISOtech –>
{“Prime”, “8243”}, // double prime = seconds = inches,U+2033 ISOtech –>
{“oline”, “8254”}, // overline = spacing overscore,U+203E NEW –>
{“frasl”, “8260”}, // fraction slash, U+2044 NEW –>
//
{“weierp”, “8472”}, // script capital P = power set= Weierstrass p, U+2118 ISOamso –>
{“image”, “8465”}, // blackletter capital I = imaginary part,U+2111 ISOamso –>
{“real”, “8476”}, // blackletter capital R = real part symbol,U+211C ISOamso –>
{“trade”, “8482”}, // trade mark sign, U+2122 ISOnum –>
{“alefsym”, “8501”}, // alef symbol = first transfinite cardinal,U+2135 NEW –>
//
//
{“larr”, “8592”}, // leftwards arrow, U+2190 ISOnum –>
{“uarr”, “8593”}, // upwards arrow, U+2191 ISOnum–>
{“rarr”, “8594”}, // rightwards arrow, U+2192 ISOnum –>
{“darr”, “8595”}, // downwards arrow, U+2193 ISOnum –>
{“harr”, “8596”}, // left right arrow, U+2194 ISOamsa –>
{“crarr”, “8629”}, // downwards arrow with corner leftwards= carriage return, U+21B5 NEW –>
{“lArr”, “8656”}, // leftwards double arrow, U+21D0 ISOtech –>
//
{“uArr”, “8657”}, // upwards double arrow, U+21D1 ISOamsa –>
{“rArr”, “8658”}, // rightwards double arrow,U+21D2 ISOtech –>
//
{“dArr”, “8659”}, // downwards double arrow, U+21D3 ISOamsa –>
{“hArr”, “8660”}, // left right double arrow,U+21D4 ISOamsa –>
//
{“forall”, “8704”}, // for all, U+2200 ISOtech –>
{“part”, “8706”}, // partial differential, U+2202 ISOtech –>
{“exist”, “8707”}, // there exists, U+2203 ISOtech –>
{“empty”, “8709”}, // empty set = null set = diameter,U+2205 ISOamso –>
{“nabla”, “8711”}, // nabla = backward difference,U+2207 ISOtech –>
{“isin”, “8712”}, // element of, U+2208 ISOtech –>
{“notin”, “8713”}, // not an element of, U+2209 ISOtech –>
{“ni”, “8715”}, // contains as member, U+220B ISOtech –>
//
{“prod”, “8719”}, // n-ary product = product sign,U+220F ISOamsb –>
//
{“sum”, “8721”}, // n-ary summation, U+2211 ISOamsb –>
//
{“minus”, “8722”}, // minus sign, U+2212 ISOtech –>
{“lowast”, “8727”}, // asterisk operator, U+2217 ISOtech –>
{“radic”, “8730”}, // square root = radical sign,U+221A ISOtech –>
{“prop”, “8733”}, // proportional to, U+221D ISOtech –>
{“infin”, “8734”}, // infinity, U+221E ISOtech –>
{“ang”, “8736”}, // angle, U+2220 ISOamso –>
{“and”, “8743”}, // logical and = wedge, U+2227 ISOtech –>
{“or”, “8744”}, // logical or = vee, U+2228 ISOtech –>
{“cap”, “8745”}, // intersection = cap, U+2229 ISOtech –>
{“cup”, “8746”}, // union = cup, U+222A ISOtech –>
{“int”, “8747”}, // integral, U+222B ISOtech –>
{“there4”, “8756”}, // therefore, U+2234 ISOtech –>
{“sim”, “8764”}, // tilde operator = varies with = similar to,U+223C ISOtech –>
//
{“cong”, “8773”}, // approximately equal to, U+2245 ISOtech –>
{“asymp”, “8776”}, // almost equal to = asymptotic to,U+2248 ISOamsr –>
{“ne”, “8800”}, // not equal to, U+2260 ISOtech –>
{“equiv”, “8801”}, // identical to, U+2261 ISOtech –>
{“le”, “8804”}, // less-than or equal to, U+2264 ISOtech –>
{“ge”, “8805”}, // greater-than or equal to,U+2265 ISOtech –>
{“sub”, “8834”}, // subset of, U+2282 ISOtech –>
{“sup”, “8835”}, // superset of, U+2283 ISOtech –>
// // not a subset of, U+2284 ISOamsn –>
{“sube”, “8838”}, // subset of or equal to, U+2286 ISOtech –>
{“supe”, “8839”}, // superset of or equal to,U+2287 ISOtech –>
{“oplus”, “8853”}, // circled plus = direct sum,U+2295 ISOamsb –>
{“otimes”, “8855”}, // circled times = vector product,U+2297 ISOamsb –>
{“perp”, “8869”}, // up tack = orthogonal to = perpendicular,U+22A5 ISOtech –>
{“sdot”, “8901”}, // dot operator, U+22C5 ISOamsb –>
//
//
{“lceil”, “8968”}, // left ceiling = apl upstile,U+2308 ISOamsc –>
{“rceil”, “8969”}, // right ceiling, U+2309 ISOamsc –>
{“lfloor”, “8970”}, // left floor = apl downstile,U+230A ISOamsc –>
{“rfloor”, “8971”}, // right floor, U+230B ISOamsc –>
{“lang”, “9001”}, // left-pointing angle bracket = bra,U+2329 ISOtech –>
//
{“rang”, “9002”}, // right-pointing angle bracket = ket,U+232A ISOtech –>
//
//
{“loz”, “9674”}, // lozenge, U+25CA ISOpub –>
//
{“spades”, “9824”}, // black spade suit, U+2660 ISOpub –>
//
{“clubs”, “9827”}, // black club suit = shamrock,U+2663 ISOpub –>
{“hearts”, “9829”}, // black heart suit = valentine,U+2665 ISOpub –>
{“diams”, “9830”}, // black diamond suit, U+2666 ISOpub –>
//
{“OElig”, “338”}, // — latin capital ligature OE,U+0152 ISOlat2 –>
{“oelig”, “339”}, // — latin small ligature oe, U+0153 ISOlat2 –>
//
{“Scaron”, “352”}, // — latin capital letter S with caron,U+0160 ISOlat2 –>
{“scaron”, “353”}, // — latin small letter s with caron,U+0161 ISOlat2 –>
{“Yuml”, “376”}, // — latin capital letter Y with diaeresis,U+0178 ISOlat2 –>
//
{“circ”, “710”}, // — modifier letter circumflex accent,U+02C6 ISOpub –>
{“tilde”, “732”}, // small tilde, U+02DC ISOdia –>
//
{“ensp”, “8194”}, // en space, U+2002 ISOpub –>
{“emsp”, “8195”}, // em space, U+2003 ISOpub –>
{“thinsp”, “8201”}, // thin space, U+2009 ISOpub –>
{“zwnj”, “8204”}, // zero width non-joiner,U+200C NEW RFC 2070 –>
{“zwj”, “8205”}, // zero width joiner, U+200D NEW RFC 2070 –>
{“lrm”, “8206”}, // left-to-right mark, U+200E NEW RFC 2070 –>
{“rlm”, “8207”}, // right-to-left mark, U+200F NEW RFC 2070 –>
{“ndash”, “8211”}, // en dash, U+2013 ISOpub –>
{“mdash”, “8212”}, // em dash, U+2014 ISOpub –>
{“lsquo”, “8216”}, // left single quotation mark,U+2018 ISOnum –>
{“rsquo”, “8217”}, // right single quotation mark,U+2019 ISOnum –>
{“sbquo”, “8218”}, // single low-9 quotation mark, U+201A NEW –>
{“ldquo”, “8220”}, // left double quotation mark,U+201C ISOnum –>
{“rdquo”, “8221”}, // right double quotation mark,U+201D ISOnum –>
{“bdquo”, “8222”}, // double low-9 quotation mark, U+201E NEW –>
{“dagger”, “8224”}, // dagger, U+2020 ISOpub –>
{“Dagger”, “8225”}, // double dagger, U+2021 ISOpub –>
{“permil”, “8240”}, // per mille sign, U+2030 ISOtech –>
{“lsaquo”, “8249”}, // single left-pointing angle quotation mark,U+2039 ISO proposed –>
//
{“r免费云主机域名saquo”, “8250”}, // single right-pointing angle quotation mark,U+203A ISO proposed –>
//
{“euro”, “8364”}, // — euro sign, U+20AC NEW –>
};
再扩展下
从前面可以看到转义字符中间的那段数字是unicode,那么 这个 转移字符可以 随便构造了 ,并不限于上面的定义,比如 中的unicode是20013,那么构造一个转移字符中,经过浏览器的渲染 就变回中了 ,虽然不必这么绕为了显示一个字符,但如果在一些不方便传输特殊字符的场景 就可以派上用途了以上是“html转义字符怎么通过代码识别”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注百云主机行业资讯频道!
相关推荐: css中调用动画animation-name属性怎么用
这篇文章主要介绍css中调用动画animation-name属性怎么用,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完! 在实现动画效果之前,我们要先了解一下animation-name属性: animation-name属性语法:…
免责声明:本站发布的图片视频文字,以转载和分享为主,文章观点不代表本站立场,本站不承担相关法律责任;如果涉及侵权请联系邮箱:360163164@qq.com举报,并提供相关证据,经查实将立刻删除涉嫌侵权内容。