HTML中的特殊字符

最近在编写WEB程序的时候，发现HTML有许多内定的特殊字符。例如" "就是表示非断行空白，其实就是空字符串。

常用的特殊字符有：

HTML 原代码显示结果描述
< < 小于号或显示标记
> > 大于号或显示标记
& & 可用于显示其它特殊字符
" " 引号
® ® 已注册
© © 版权
™ ™ 商标
&ensp; 半个空白位
&emsp; 一个空白位
  不断行的空白

全部特殊字符为：

Character 字符	Decimal code 十进制编码	Named entity 已命名实体	Character 字符	Decimal code 十进制编码	Named entity 已命名实体
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
---		---	---		---
		---	!	!	---
"	"	"	#	#	---
$	$	---	%	%	---
&	&	&	'	'	---
(	(	---	)	)	---
*	*	---	+	+	---
,	,	---	-	-	---
.	.	---	/	/	---
0	0	---	1	1	---
2	2	---	3	3	---
4	4	---	5	5	---
6	6	---	7	7	---
8	8	---	9	9	---
:	:	---	;	;	---
<	<	<	=	=	---
>	>	>	?	?	---
@	@	---	A	A	---
B	B	---	C	C	---
D	D	---	E	E	---
F	F	---	G	G	---
H	H	---	I	I	---
J	J	---	K	K	---
L	L	---	M	M	---
N	N	---	O	O	---
P	P	---	Q	Q	---
R	R	---	S	S	---
T	T	---	U	U	---
V	V	---	W	W	---
X	X	---	Y	Y	---
Z	Z	---	[	[	---
\	\	---	]	]	---
^	^	---	_	_	---
`	`	---	a	a	---
b	b	---	c	c	---
d	d	---	e	e	---
f	f	---	g	g	---
h	h	---	i	i	---
j	j	---	k	k	---
l	l	---	m	m	---
n	n	---	o	o	---
p	p	---	q	q	---
r	r	---	s	s	---
t	t	---	u	u	---
v	v	---	w	w	---
x	x	---	y	y	---
z	z	---	{	{	---
\|	\|	---	}	}	---
~	~	---	---		---
			¡	¡	¡
¢	¢	¢	£	£	£
¤	¤	¤	¥	¥	¥
¦	¦	¦ or &brkbar;	§	§	§
¨	¨	¨ or &die;	©	©	©
ª	ª	ª	«	«	«
¬	¬	&not
®	®	®	¯	¯	¯ or &hibar;
°	°	°	±	±	±
²	²	²	³	³	³
´	´	´	µ	µ	µ
¶	¶	¶	·	·	·
¸	¸	¸	¹	¹	¹
º	º	º	»	»	»
¼	¼	¼	½	½	½
¾	¾	¾	¿	¿	¿
À	À	À	Á	Á	Á
Â	Â	Â	Ã	Ã	Ã
Ä	Ä	Ä	Å	Å	Å
Æ	Æ	Æ	Ç	Ç	Ç
È	È	È	É	É	É
Ê	Ê	Ê	Ë	Ë	Ë
Ì	Ì	Ì	Í	Í	Í
Î	Î	Î	Ï	Ï	Ï
Ð	Ð	Ð	Ñ	Ñ	Ñ
Ò	Ò	Ò	Ó	Ó	Ó
Ô	Ô	Ô	Õ	Õ	Õ
Ö	Ö	Ö	×	×	×
Ø	Ø	Ø	Ù	Ù	Ù
Ú	Ú	Ú	Û	Û	Û
Ü	Ü	Ü	Ý	Ý	Ý
Þ	Þ	Þ	ß	ß	ß
à	à	à	á	á	á
â	â	â	ã	ã	ã
ä	ä	ä	å	å	å
æ	æ	æ	ç	ç	ç
è	è	è	é	é	é
ê	ê	ê	ë	ë	ë
ì	ì	ì	í	í	í
î	î	î	ï	ï	ï
ð	ð	ð	ñ	ñ	ñ
ò	ò	ò	ó	ó	ó
ô	ô	ô	õ	õ	õ
ö	ö	ö	÷	÷	÷
ø	ø	ø	ù	ù	ù
ú	ú	ú	û	û	û
ü	ü	ü	ý	ý	ý
þ	þ	þ	ÿ	ÿ	ÿ

Character 字符	Named entity 已命名实体	Numeric character reference 十进制编码	Description 简介
扩展拉丁字符 Latin Extended-B
ƒ	&fnof;	ƒ	Latin small f with hook, =function, =florin, U0192 ISOtech
希腊字符 Greek
Α	Α	Α	Greek capital letter alpha, U0391
Β	Β	Β	Greek capital letter beta, U0392
Γ	Γ	Γ	Greek capital letter gamma, U0393 ISOgrk3
Δ	Δ	Δ	Greek capital letter delta, U0394 ISOgrk3
Ε	Ε	Ε	Greek capital letter epsilon, U0395
Ζ	Ζ	Ζ	Greek capital letter zeta, U0396
Η	Η	Η	Greek capital letter eta, U0397
Θ	Θ	Θ	Greek capital letter theta, U0398 ISOgrk3
Ι	Ι	Ι	Greek capital letter iota, U0399
Κ	Κ	Κ	Greek capital letter kappa, U039A
Λ	Λ	Λ	Greek capital letter lambda, U039B ISOgrk3
Μ	Μ	Μ	Greek capital letter mu, U039C
Ν	Ν	Ν	Greek capital letter nu, U039D
Ξ	Ξ	Ξ	Greek capital letter xi, U039E ISOgrk3
Ο	Ο	Ο	Greek capital letter omicron, U039F
Π	Π	Π	Greek capital letter pi, U03A0 ISOgrk3
Ρ	Ρ	Ρ	Greek capital letter rho, U03A1
Σ	Σ	Σ	Greek capital letter sigma, U03A3 ISOgrk3
Τ	Τ	Τ	Greek capital letter tau, U03A4
Υ	Υ	Υ	Greek capital letter upsilon, U03A5 ISOgrk3
Φ	Φ	Φ	Greek capital letter phi, U03A6 ISOgrk3
Χ	Χ	Χ	Greek capital letter chi, U03A7
Ψ	Ψ	Ψ	Greek capital letter psi, U03A8 ISOgrk3
Ω	Ω	Ω	Greek capital letter omega, U03A9 ISOgrk3
α	α	α	Greek small letter alpha, U03B1 ISOgrk3
β	β	β	Greek small letter beta, U03B2 ISOgrk3
γ	γ	γ	Greek small letter gamma, U03B3 ISOgrk3
δ	δ	δ	Greek small letter delta, U03B4 ISOgrk3
ε	ε	ε	Greek small letter epsilon, U03B5 ISOgrk3
ζ	ζ	ζ	Greek small letter zeta, U03B6 ISOgrk3
η	η	η	Greek small letter eta, U03B7 ISOgrk3
θ	θ	θ	Greek small letter theta, U03B8 ISOgrk3
ι	ι	ι	Greek small letter iota, U03B9 ISOgrk3
κ	κ	κ	Greek small letter kappa, U03BA ISOgrk3
λ	λ	λ	Greek small letter lambda, U03BB ISOgrk3
μ	μ	μ	Greek small letter mu, U03BC ISOgrk3
ν	ν	ν	Greek small letter nu, U03BD ISOgrk3
ξ	ξ	ξ	Greek small letter xi, U03BE ISOgrk3
ο	ο	ο	Greek small letter omicron, U03BF NEW
π	π	π	Greek small letter pi, U03C0 ISOgrk3
ρ	ρ	ρ	Greek small letter rho, U03C1 ISOgrk3
ς	&sigmaf;	ς	Greek small letter final sigma, U03C2 ISOgrk3
σ	σ	σ	Greek small letter sigma, U03C3 ISOgrk3
τ	τ	τ	Greek small letter tau, U03C4 ISOgrk3
υ	υ	υ	Greek small letter upsilon, U03C5 ISOgrk3
φ	φ	φ	Greek small letter phi, U03C6 ISOgrk3
χ	χ	χ	Greek small letter chi, U03C7 ISOgrk3
ψ	ψ	ψ	Greek small letter psi, U03C8 ISOgrk3
ω	ω	ω	Greek small letter omega, U03C9 ISOgrk3
ϑ	&thetasym;	ϑ	Greek small letter theta symbol, U03D1 NEW
ϒ	&upsih;	ϒ	Greek upsilon with hook symbol, U03D2 NEW
ϖ	ϖ	ϖ	Greek pi symbol, U03D6 ISOgrk3
通用标点符号 General Punctuation
•	•	•	bullet, =black small circle, U2022 ISOpub
…	…	…	horizontal ellipsis, =three dot leader, U2026 ISOpub
′	′	′	prime, =minutes, =feet, U2032 ISOtech
″	″	″	double prime, =seconds, =inches, U2033 ISOtech
‾	&oline;	‾	overline, =spacing overscore, U203E NEW
⁄	&frasl;	⁄	fraction slash, U2044 NEW
字符标记 Letterlike Symbols
℘	&weierp;	℘	script capital P, =power set, =Weierstrass p, U2118 ISOamso
ℑ	&image;	ℑ	blackletter capital I, =imaginary part, U2111 ISOamso
ℜ	&real;	ℜ	blackletter capital R, =real part symbol, U211C ISOamso
™	™	™	trade mark sign, U2122 ISOnum
ℵ	&alefsym;	ℵ	alef symbol, =first transfinite cardinal, U2135 NEW
箭头 Arrows
←	←	←	leftward arrow, U2190 ISOnum
↑	↑	↑	upward arrow, U2191 ISOnum
→	→	→	rightward arrow, U2192 ISOnum
↓	↓	↓	downward arrow, U2193 ISOnum
↔	↔	↔	left right arrow, U2194 ISOamsa
↵	&crarr;	↵	downward arrow with corner leftward, =carriage return, U21B5 NEW
⇐	⇐	⇐	leftward double arrow, U21D0 ISOtech
⇑	&uArr;	⇑	upward double arrow, U21D1 ISOamsa
⇒	⇒	⇒	rightward double arrow, U21D2 ISOtech
⇓	&dArr;	⇓	downward double arrow, U21D3 ISOamsa
⇔	⇔	⇔	left right double arrow, U21D4 ISOamsa
数学符号 Mathematical Operators
∀	∀	∀	for all, U2200 ISOtech
∂	∂	∂	partial differential, U2202 ISOtech
∃	∃	∃	there exists, U2203 ISOtech
∅	∅	∅	empty set, =null set, =diameter, U2205 ISOamso
∇	∇	∇	nabla, =backward difference, U2207 ISOtech
∈	∈	∈	element of, U2208 ISOtech
∉	∉	∉	not an element of, U2209 ISOtech
∋	&ni;	∋	contains as member, U220B ISOtech
∏	∏	∏	n-ary product, =product sign, U220F ISOamsb
−	∑	−	n-ary sumation, U2211 ISOamsb
−	−	−	minus sign, U2212 ISOtech
∗	&lowast;	∗	asterisk operator, U2217 ISOtech
√	√	√	square root, =radical sign, U221A ISOtech
∝	&prop;	∝	proportional to, U221D ISOtech
∞	∞	∞	infinity, U221E ISOtech
∠	&ang;	∠	angle, U2220 ISOamso
⊥	&and;	⊥	logical and, =wedge, U2227 ISOtech
⊦	&or;	⊦	logical or, =vee, U2228 ISOtech
∩	∩	∩	intersection, =cap, U2229 ISOtech
∪	∪	∪	union, =cup, U222A ISOtech
∫	∫	∫	integral, U222B ISOtech
∴	&there4;	∴	therefore, U2234 ISOtech
∼	&sim;	∼	tilde operator, =varies with, =similar to, U223C ISOtech
≅	&cong;	≅	approximately equal to, U2245 ISOtech
≅	≈	≅	almost equal to, =asymptotic to, U2248 ISOamsr
≠	≠	≠	not equal to, U2260 ISOtech
≡	&equiv;	≡	identical to, U2261 ISOtech
≤	≤	≤	less-than or equal to, U2264 ISOtech
≥	≥	≥	greater-than or equal to, U2265 ISOtech
⊂	⊂	⊂	subset of, U2282 ISOtech
⊃	⊃	⊃	superset of, U2283 ISOtech
⊄	&nsub;	⊄	not a subset of, U2284 ISOamsn
⊆	&sube;	⊆	subset of or equal to, U2286 ISOtech
⊇	&supe;	⊇	superset of or equal to, U2287 ISOtech
⊕	&oplus;	⊕	circled plus, =direct sum, U2295 ISOamsb
⊗	&otimes;	⊗	circled times, =vector product, U2297 ISOamsb
⊥	&perp;	⊥	up tack, =orthogonal to, =perpendicular, U22A5 ISOtech
⋅	⋅	⋅	dot operator, U22C5 ISOamsb
其他技术符号 Miscellaneous Technical
⌈	&lceil;	⌈	left ceiling, =apl upstile, U2308, ISOamsc
⌉	&rceil;	⌉	right ceiling, U2309, ISOamsc
⌊	&lfloor;	⌊	left floor, =apl downstile, U230A, ISOamsc
⌋	&rfloor;	⌋	right floor, U230B, ISOamsc
〈	&lang;	〈	left-pointing angle bracket, =bra, U2329 ISOtech
〉	&rang;	〉	right-pointing angle bracket, =ket, U232A ISOtech
几何图形 Geometric Shapes
◊	&loz;	◊	lozenge, U25CA ISOpub
其他标记 Miscellaneous Symbols
♠	&spades;	♠	black spade suit, U2660 ISOpub
♣	&clubs;	♣	black club suit, =shamrock, U2663 ISOpub
♥	&hearts;	♥	black heart suit, =valentine, U2665 ISOpub
♦	&diams;	♦	black diamond suit, U2666 ISOpub

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HTML中的特殊字符

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