HTML编码、HTML解码

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

字符	实体	十进制	十六进制	描述
&	&	&	&	ampersand
<	<	<	<	less than
>	>	>	>	greater than
				no-break space = non-breaking space
¡	¡	¡	¡	inverted exclamation mark
¢	¢	¢	¢	cent sign
£	£	£	£	pound sign
¤	¤	¤	¤	currency sign
¥	¥	¥	¥	yen sign = yuan sign
¦	¦	¦	¦	broken bar = broken vertical bar
§	§	§	§	section sign
¨	¨	¨	¨	diaeresis = spacing diaeresis
©	©	©	©	copyright sign
ª	ª	ª	ª	feminine ordinal indicator
«	«	«	«	left-pointing double angle quotation mark = left pointing guillemet
¬	¬	¬	¬	not sign
				soft hyphen = discretionary hyphen
®	®	®	®	registered sign = registered trade mark sign
¯	¯	¯	¯	macron = spacing macron = overline = APL overbar
°	°	°	°	degree sign
±	±	±	±	plus-minus sign = plus-or-minus sign
²	²	²	²	superscript two = superscript digit two = squared
³	³	³	³	superscript three = superscript digit three = cubed
´	´	´	´	acute accent = spacing acute
µ	µ	µ	µ	micro sign
¶	¶	¶	¶	pilcrow sign = paragraph sign
·	·	·	·	middle dot = Georgian comma = Greek middle dot
¸	¸	¸	¸	cedilla = spacing cedilla
¹	¹	¹	¹	superscript one = superscript digit one
º	º	º	º	masculine ordinal indicator
»	»	»	»	right-pointing double angle quotation mark = right pointing guillemet
¼	¼	¼	¼	vulgar fraction one quarter = fraction one quarter
½	½	½	½	vulgar fraction one half = fraction one half
¾	¾	¾	¾	vulgar fraction three quarters = fraction three quarters
¿	¿	¿	¿	inverted question mark = turned question mark
À	À	À	À	latin capital letter A with grave = latin capital letter A grave
Á	Á	Á	Á	latin capital letter A with acute
Â	Â	Â	Â	latin capital letter A with circumflex
Ã	Ã	Ã	Ã	latin capital letter A with tilde
Ä	Ä	Ä	Ä	latin capital letter A with diaeresis
Å	Å	Å	Å	latin capital letter A with ring above = latin capital letter A ring
Æ	Æ	Æ	Æ	latin capital letter AE = latin capital ligature AE
Ç	Ç	Ç	Ç	latin capital letter C with cedilla
È	È	È	È	latin capital letter E with grave
É	É	É	É	latin capital letter E with acute
Ê	Ê	Ê	Ê	latin capital letter E with circumflex
Ë	Ë	Ë	Ë	latin capital letter E with diaeresis
Ì	Ì	Ì	Ì	latin capital letter I with grave
Í	Í	Í	Í	latin capital letter I with acute
Î	Î	Î	Î	latin capital letter I with circumflex
Ï	Ï	Ï	Ï	latin capital letter I with diaeresis
Ð	Ð	Ð	Ð	latin capital letter ETH
Ñ	Ñ	Ñ	Ñ	latin capital letter N with tilde
Ò	Ò	Ò	Ò	latin capital letter O with grave
Ó	Ó	Ó	Ó	latin capital letter O with acute
Ô	Ô	Ô	Ô	latin capital letter O with circumflex
Õ	Õ	Õ	Õ	latin capital letter O with tilde
Ö	Ö	Ö	Ö	latin capital letter O with diaeresis
×	×	×	×	multiplication sign
Ø	Ø	Ø	Ø	latin capital letter O with stroke = latin capital letter O slash
Ù	Ù	Ù	Ù	latin capital letter U with grave
Ú	Ú	Ú	Ú	latin capital letter U with acute
Û	Û	Û	Û	latin capital letter U with circumflex
Ü	Ü	Ü	Ü	latin capital letter U with diaeresis
Ý	Ý	Ý	Ý	latin capital letter Y with acute
Þ	Þ	Þ	Þ	latin capital letter THORN
ß	ß	ß	ß	latin small letter sharp s = ess-zed
à	à	à	à	latin small letter a with grave = latin small letter a grave
á	á	á	á	latin small letter a with acute
â	â	â	â	latin small letter a with circumflex
ã	ã	ã	ã	latin small letter a with tilde
ä	ä	ä	ä	latin small letter a with diaeresis
å	å	å	å	latin small letter a with ring above = latin small letter a ring
æ	æ	æ	æ	latin small letter ae = latin small ligature ae
ç	ç	ç	ç	latin small letter c with cedilla
è	è	è	è	latin small letter e with grave
é	é	é	é	latin small letter e with acute
ê	ê	ê	ê	latin small letter e with circumflex
ë	ë	ë	ë	latin small letter e with diaeresis
ì	ì	ì	ì	latin small letter i with grave
í	í	í	í	latin small letter i with acute
î	î	î	î	latin small letter i with circumflex
ï	ï	ï	ï	latin small letter i with diaeresis
ð	ð	ð	ð	latin small letter eth
ñ	ñ	ñ	ñ	latin small letter n with tilde
ò	ò	ò	ò	latin small letter o with grave
ó	ó	ó	ó	latin small letter o with acute
ô	ô	ô	ô	latin small letter o with circumflex
õ	õ	õ	õ	latin small letter o with tilde
ö	ö	ö	ö	latin small letter o with diaeresis
÷	÷	÷	÷	division sign
ø	ø	ø	ø	latin small letter o with stroke = latin small letter o slash
ù	ù	ù	ù	latin small letter u with grave
ú	ú	ú	ú	latin small letter u with acute
û	û	û	û	latin small letter u with circumflex
ü	ü	ü	ü	latin small letter u with diaeresis
ý	ý	ý	ý	latin small letter y with acute
þ	þ	þ	þ	latin small letter thorn
ÿ	ÿ	ÿ	ÿ	latin small letter y with diaeresis
ƒ	&fnof;	ƒ	ƒ	latin small f with hook = function = florin
Α	Α	Α	Α	greek capital letter alpha
Β	Β	Β	Β	greek capital letter beta
Γ	Γ	Γ	Γ	greek capital letter gamma
Δ	Δ	Δ	Δ	greek capital letter delta
Ε	Ε	Ε	Ε	greek capital letter epsilon
Ζ	Ζ	Ζ	Ζ	greek capital letter zeta
Η	Η	Η	Η	greek capital letter eta
Θ	Θ	Θ	Θ	greek capital letter theta
Ι	Ι	Ι	Ι	greek capital letter iota
Κ	Κ	Κ	Κ	greek capital letter kappa
Λ	Λ	Λ	Λ	greek capital letter lambda
Μ	Μ	Μ	Μ	greek capital letter mu
Ν	Ν	Ν	Ν	greek capital letter nu
Ξ	Ξ	Ξ	Ξ	greek capital letter xi
Ο	Ο	Ο	Ο	greek capital letter omicron
Π	Π	Π	Π	greek capital letter pi
Ρ	Ρ	Ρ	Ρ	greek capital letter rho
				(not used)
Σ	Σ	Σ	Σ	greek capital letter sigma
Τ	Τ	Τ	Τ	greek capital letter tau
Υ	Υ	Υ	Υ	greek capital letter upsilon
Φ	Φ	Φ	Φ	greek capital letter phi
Χ	Χ	Χ	Χ	greek capital letter chi
Ψ	Ψ	Ψ	Ψ	greek capital letter psi
Ω	Ω	Ω	Ω	greek capital letter omega
				(not used)
α	α	α	α	greek smal letter alpha
β	β	β	β	greek smal letter beta
γ	γ	γ	γ	greek smal letter gamma
δ	δ	δ	δ	greek smal letter delta
ε	ε	ε	ε	greek smal letter epsilon
ζ	ζ	ζ	ζ	greek smal letter zeta
η	η	η	η	greek smal letter eta
θ	θ	θ	θ	greek smal letter theta
ι	ι	ι	ι	greek smal letter iota
κ	κ	κ	κ	greek smal letter kappa
λ	λ	λ	λ	greek smal letter lambda
μ	μ	μ	μ	greek smal letter mu
ν	ν	ν	ν	greek smal letter nu
ξ	ξ	ξ	ξ	greek smal letter xi
ο	ο	ο	ο	greek smal letter omicron
π	π	π	π	greek smal letter pi
ρ	ρ	ρ	ρ	greek smal letter rho
ς	&sigmaf;	ς	ς	greek smal letter final sigma
σ	σ	σ	σ	greek smal letter sigma
τ	τ	τ	τ	greek smal letter tau
υ	υ	υ	υ	greek smal letter upsilon
φ	φ	φ	φ	greek smal letter phi
χ	χ	χ	χ	greek smal letter chi
ψ	ψ	ψ	ψ	greek smal letter psi
ω	ω	ω	ω	greek smal letter omega
				(not used)
ϑ	&thetasym;	ϑ	ϑ	greek smal letter theta symbol
ϒ	&upsih;	ϒ	ϒ	Greek upsilon with hook symbol
				(not used)
ϖ	ϖ	ϖ	ϖ	Greek pi symbol

特殊符号

字符	实体	十进制	十六进制	描述
•	•	•	•	bullet = black small circle
…	…	…	…	horizontal ellipsis = three dot leader
′	′	′	′	prime = minutes = feet
″	″	″	″	double prime = seconds = inches
‾	&oline;	‾	‾	overline = spacing overscore
⁄	&frasl;	⁄	⁄	fraction slash
℘	&weierp;	℘	℘	script capital P = power set = Weierstrass p
ℑ	&image;	ℑ	ℑ	blackletter capital I = imaginary part
ℜ	&real;	ℜ	ℜ	blackletter capital R = real part symbol
™	™	™	™	trade mark sign
ℵ	&alefsym;	ℵ	ℵ	alef symbol = first transfinite cardinal
←	←	←	←	leftwards arrow
↑	↑	↑	↑	upwards arrow
→	→	→	→	rightwards arrow
↓	↓	↓	↓	downwards arrow
↔	↔	↔	↔	left right arrow
↵	&crarr;	↵	↵	downwards arrow with corner leftwards = carriage return
⇐	⇐	⇐	⇐	leftwards double arrow
⇑	&uArr;	⇑	⇑	upwards double arrow
⇒	⇒	⇒	⇒	rightwards double arrow
⇓	&dArr;	⇓	⇓	downwards double arrow
⇔	⇔	⇔	⇔	left right double arrow
∀	∀	∀	∀	for all
∂	∂	∂	∂	partial differential
∃	∃	∃	∃	there exists
∅	∅	∅	∅	empty set = null set = diameter
∇	∇	∇	∇	nabla = backward difference
∈	∈	∈	∈	element of
∉	∉	∉	∉	not an element of
∋	&ni;	∋	∋	contains as member
∏	∏	∏	∏	n-ary product = product sign
∑	∑	∑	∑	n-ary sumation
−	−	−	−	minus sign
∗	&lowast;	∗	∗	asterisk operator
√	√	√	√	square root = radical sign
∝	&prop;	∝	∝	proportional to
∞	∞	∞	∞	infinity
∠	&ang;	∠	∠	angle
∧	&and;	∧	∧	logical and = wedge
∨	&or;	∨	∨	logical or = vee
∩	∩	∩	∩	intersection = cap
∪	∪	∪	∪	union = cup
∫	∫	∫	∫	integral
∴	&there4;	∴	∴	therefore
∼	&sim;	∼	∼	tilde operator = varies with = similar to
≅	&cong;	≅	≅	approximately equal to
≈	≈	≈	≈	almost equal to = asymptotic to
≠	≠	≠	≠	not equal to
≡	&equiv;	≡	≡	identical to
≤	≤	≤	≤	less-than or equal to
≥	≥	≥	≥	greater-than or equal to
⊂	⊂	⊂	⊂	subset of
⊃	⊃	⊃	⊃	superset of
⊄	&nsub;	⊄	⊄	not a subset of
⊆	&sube;	⊆	⊆	subset of or equal to
⊇	&supe;	⊇	⊇	superset of or equal to
⊕	&oplus;	⊕	⊕	circled plus = direct sum
⊗	&otimes;	⊗	⊗	circled times = vector product
⊥	&perp;	⊥	⊥	up tack = orthogonal to = perpendicular
⋅	⋅	⋅	⋅	dot operator
⌈	&lceil;	⌈	⌈	left ceiling = APL upstile
⌉	&rceil;	⌉	⌉	right ceiling
⌊	&lfloor;	⌊	⌊	left floor = APL downstile
⌋	&rfloor;	⌋	⌋	right floor
〈	&lang;	〈	〈	left-pointing angle bracket = bra
〉	&rang;	〉	〉	right-pointing angle bracket = ket
◊	&loz;	◊	◊	lozenge
♠	&spades;	♠	♠	black spade suit
♣	&clubs;	♣	♣	black club suit = shamrock
♥	&hearts;	♥	♥	black heart suit = valentine
♦	&diams;	♦	♦	black diamond suit

参考：

https://www.w3school.com.cn/charsets/ref_html_entities_4.asp

HTML 字符集

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HTML编码、HTML解码

完整的 HTML 4 实体参考手册

特殊符号

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