ʽʽοȫʽʵ⣩ 
^\d+$//ƥǸ + 0 
//ƥ ^\d+(\.\d+)?$//ƥǸ + 0 
^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$//ƥ 
^((-\d+(\.\d+)?)|(0+(\.0+)?))$//ƥ + 0 
^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$//ƥ为 
^(-?\d+)(\.\d+)?$//ƥ両 
^[A-Za-z]+$          //ƥ26Ӣĸɵַ 
^[A-Z]+$    //ƥ26ӢĸĴдɵַ 
^[a-z]+$//ƥ26ӢĸСдɵַ 
^[A-Za-z0-9]+$//ƥֺ26Ӣĸɵַ 
^\w+$//ƥ֡26Ӣĸ»ɵַ 
^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$//ƥemailַ 
^[a-zA-z]+://ƥ(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$//ƥurl 
ƥַʽ [\u4e00-\u9fa5] 
ƥ˫ַֽ()[^\x00-\xff] 
ƥеʽ\n[\s| ]*\r 
ƥHTMLǵʽ/<(.*)>.*<\/>|<(.*) \/>/ 
ƥβոʽ(^\s*)|(\s*$) 
ƥEmailַʽ\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 
ƥַURLʽ^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$ 
ƥʺǷϷ(ĸͷ5-16ֽڣĸ»)^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 
ƥڵ绰룺(\d{3}-|\d{4}-)?(\d{8}|\d{7})? 
ƥѶQQţ^[1-9]*[1-9][0-9]*$ 

±ԪַʽеΪһб嵽ÿʽţ 
\ һַΪһַһԭַһáһ˽ת 
^ ƥַĿʼλá RegExp Multiline ԣ^ Ҳƥ \n  \r ֮λá 
$ ƥַĽλá RegExp Multiline ԣ$ Ҳƥ \n  \r ֮ǰλá 
* ƥǰӱʽλΡ 
+ ƥǰӱʽһλΡ+ ȼ {1,} 
? ƥǰӱʽλһΡ? ȼ {0,1} 
{n} n һǸƥȷn Ρ 
{n,} n һǸƥn Ρ 
{n,m} m  n ΪǸn <= mƥ n ƥ m Ρڶź֮䲻пո 
? ַκһƷ (*, +, ?, {n}, {n,}, {n,m}) ʱƥģʽǷ̰ġ̰ģʽٵƥַĬϵ̰ģʽ򾡿ܶƥַ 
. ƥ "\n" ֮κεַҪƥ \n ڵκַʹ [.\n] ģʽ 
(pattern) ƥpattern ȡһƥ䡣 (?:pattern) ƥpattern ȡƥҲ˵һǻȡƥ䣬д洢Ժʹá (?=pattern) Ԥ飬κƥ pattern ַʼƥַһǻȡƥ䣬Ҳ˵ƥ䲻ҪȡԺʹá (?!pattern) Ԥ飬(?=pattern)෴ x|y ƥ x  y 
[xyz] ַϡ 
[^xyz] ֵַϡ 
[a-z] ַΧƥָΧڵַ
[^a-z] ֵַΧƥκβָΧڵַ 
\b ƥһʱ߽磬ҲָʺͿոλá 
\B ƥǵʱ߽硣 
\cx ƥxָĿַ 
\d ƥһַȼ [0-9] 
\D ƥһַȼ [^0-9]
 \f ƥһҳȼ \x0c  \cL 
\n ƥһзȼ \x0a  \cJ 
\r ƥһسȼ \x0d  \cM 
\s ƥκοհַոƱҳȵȡȼ[ \f\n\r\t\v] 
\S ƥκηǿհַȼ [^ \f\n\r\t\v] 
\t ƥһƱȼ \x09  \cI
\v ƥһֱƱȼ \x0b  \cK 
\w ƥ»ߵκεַȼڡ[A-Za-z0-9_]
\W ƥκηǵַȼ [^A-Za-z0-9_]
\xn ƥ n n ΪʮתֵʮתֵΪȷֳ 
\num ƥ numnumһȡƥá 
\n ʶһ˽תֵһá \n ֮ǰ n ȡӱʽ n Ϊá n Ϊ˽ (0-7) n Ϊһ˽תֵ 
\nm ʶһ˽תֵһá \nm ֮ǰis preceded by at least nm ȡӱʽ nm Ϊá \nm ֮ǰ n ȡ n Ϊһ m ĺáǰ㣬 n  m Ϊ˽ (0-7) \nm ƥ˽תֵ nm \nml  n Ϊ˽ (0-3) m  l Ϊ˽ (0-7)ƥ.