java正则表达式

//: c12:TestRegularExpression.java
	Psiy&k0y	}HD%g"P0// Allows you to easly try out regular expressions.51Testing软件测试网iH9PX9i1r
// {Args: abcabcabcdefabc "abc+" "(abc)+" "(abc){2,}" }51Testing软件测试网3z3l_
@;~/Y!mH
import java.util.regex.*;51Testing软件测试网:a'wL
C	Jb
KlH
publicclass TestRegularExpression {
#qojAPN]I)c0publicstaticvoid main(String[] args) {51Testing软件测试网;@wz%B_
J)p
if(args.length < 2) {51Testing软件测试网$k6l'^N:} eI
System.out.println("Usage:\n" +51Testing软件测试网E.H~/s aY,a%Us2A7T
"java TestRegularExpression " +51Testing软件测试网	K'?#fq)YZ3A
"characterSequence regularExpression+");
Peud
Y1j,z0System.exit(0);
{L$O.F*z^P;Q0}
7uz-fXT0System.out.println("Input: \"" + args[0] + "\"");51Testing软件测试网j9B4FV$G4j
for(int i = 1; i < args.length; i++) {51Testing软件测试网om;q2x
Qv(S
System.out.println(
F	?
i-hC0"Regular expression: \"" + args[i] + "\"");
"_&Z)?$s/D0Pattern p = Pattern.compile(args[i]);
"x8w$p:P)Gp@\0Matcher m = p.matcher(args[0]);51Testing软件测试网	^&i]3t^&}q:g*Ub
while(m.find()) {51Testing软件测试网(^s&?;P,Gp/l/D
System.out.println("Match \"" + m.group() +51Testing软件测试网\_{P;sO
"\" at positions " +51Testing软件测试网!QB-y2`"n(N0U-_/b
m.start() + "-" + (m.end() - 1));
L8_&iD6?r0^0}
P)T
m@&\ ?2Vz0}51Testing软件测试网6h
TaRL_0H)c1w
}51Testing软件测试网(?I|+}-Yzy3{0LC
} ///:~

//: c12:FindDemo.java
Z!mLWBc0import java.util.regex.*;
6q0\	V ?l)b2W+V2p0import com.bruceeckel.simpletest.*;
&A$Wo,T~0import java.util.*;51Testing软件测试网i#O!`"f
uCnF	_g
publicclass FindDemo {
jq-IVEmDG0z2d0privatestatic Test monitor = new Test();
"Ey'`"V'nPDS/QL4tI;x0publicstaticvoid main(String[] args) {
Tz$V7gH]4j7U0Matcher m = Pattern.compile("\\w+")51Testing软件测试网*|s[1n*Q-_o
.matcher("Evening is full of the linnet's wings");
z3Yu)w8v)Iw `x7]0while(m.find())51Testing软件测试网*H^2lP!N*U&z
System.out.println(m.group());
8t4eO8ZC
]!C\ w{0int i = 0;
%z/R@	g!?0j\0while(m.find(i)) {

WdpS6~'u!o DU0System.out.print(m.group() + " ");
|G3\"BW%C;C4p0i++;
MG HKR@f0}51Testing软件测试网,i&TD.b_|L+M9@?5dn
monitor.expect(new String[] {51Testing软件测试网8r/]&h	T9p_
"Evening",51Testing软件测试网^c"{/Y1WcH n
"is",
&jG/yN~wMx_0"full",
YlUo
d'I0"of",
S],u-j7f0"the",
$P`'A4jWPK0"linnet",51Testing软件测试网"u:Sy|a8kC2n#X
"s",51Testing软件测试网O\V7Ne(L2E'g
"wings",51Testing软件测试网)B%iAT_%oqgk
"Evening vening ening ning ing ng g is is s full " +

k9Q.Te~+HX){8?
D0"full ull ll l of of f the the he e linnet linnet " +51Testing软件测试网g"n/N2G_J6Y2mn
"innet nnet net et t s s wings wings ings ngs gs s "

`(P"{8Hlm0});
2B8u[;Nmh5n,B.xlRN0}51Testing软件测试网\9v5tF9yH
} ///:~

//: c12:Groups.java
,PNV1|)s;|vI(a#\ [0import java.util.regex.*;51Testing软件测试网kz}m?d"L
import com.bruceeckel.simpletest.*;
@D(P-]
n6Yz&@0publicclass Groups {51Testing软件测试网%_^m#uu-J2h
privatestatic Test monitor = new Test();51Testing软件测试网(|6L6`5a3^DA
staticpublicfinal String poem =
%zV!?7F*yv^0"Twas brillig, and the slithy toves\n" +
Oy)k1Lq2tUh0"Did gyre and gimble in the wabe.\n" +
]K0_{(QV9us0"All mimsy were the borogoves,\n" +51Testing软件测试网)n,@~*i'VSA+d?
"And the mome raths outgrabe.\n\n" +
EA}$z
R0"Beware the Jabberwock, my son,\n" +51Testing软件测试网"T+A
S.TD@
"The jaws that bite, the claws that catch.\n" +
P$vDb1dk`F3ek
h0"Beware the Jubjub bird, and shun\n" +
:fxy+w"}.XK0"The frumious Bandersnatch.";51Testing软件测试网l+HJK-t|
publicstaticvoid main(String[] args) {
	kZ|!Z3^9K?6N0Matcher m =51Testing软件测试网e_S3X?+{wh
Pattern.compile("(?m)(\\S+)\\s+((\\S+)\\s+(\\S+))$")51Testing软件测试网}-Z-p	lnr?U
.matcher(poem);
X&n.]Sb0Iv0while(m.find()) {
}b1{fy&I0for(int j = 0; j <= m.groupCount(); j++)
b_A-g1b0System.out.print("[" + m.group(j) + "]");
6nLi0rtf1\1f	[0System.out.println();
c
RZ
L3Tp0}51Testing软件测试网%VB3Dc8W%oW.H5u
monitor.expect(new String[]{51Testing软件测试网GQ6@Zk#O,q_!T
"[the slithy toves]" +
 {K3{"s6gLiG0"[the][slithy toves][slithy][toves]",
9}D j2{*YYQ0"[in the wabe.][in][the wabe.][the][wabe.]",51Testing软件测试网
E+nchUc)N0}
"[were the borogoves,]" +
\f|st
[F&IoY0"[were][the borogoves,][the][borogoves,]",
fv|_0v
eZy/fo0"[mome raths outgrabe.]" +
c?A{sKL0"[mome][raths outgrabe.][raths][outgrabe.]",51Testing软件测试网 {4^.O6_:nP9sk
"[Jabberwock, my son,]" +51Testing软件测试网E"W'Um!gW'z,{LI
"[Jabberwock,][my son,][my][son,]",
	H5EW'k:o
F"xP0"[claws that catch.]" +51Testing软件测试网(Q(g,M
Vk]PWX`3@
"[claws][that catch.][that][catch.]",
-TSX;hl0d3^5L0"[bird, and shun][bird,][and shun][and][shun]",
!x4e_	nY7Y0"[The frumious Bandersnatch.][The]" +51Testing软件测试网d4^V.T	p8r^A}
"[frumious Bandersnatch.][frumious][Bandersnatch.]"
!^4@$|/]:}O	]-Y0});
~4g~&DK1m7DZ|%b$m0}
$iL)?4q0P
qZ^;j0} ///:~

//: c12:StartEnd.java51Testing软件测试网2^!E~jL/}%~!p
import java.util.regex.*;
&c0bYx
^j0import com.bruceeckel.simpletest.*;
P_R	q0}~:nB)f\:R0publicclass StartEnd {51Testing软件测试网LBa-DZ2P
privatestatic Test monitor = new Test();51Testing软件测试网R#]#p(q'^1Yx
publicstaticvoid main(String[] args) {51Testing软件测试网ru4T~(?LA
String[] input = new String[] {
g
}8K[$vy*a0"Java has regular expressions in 1.4",
&j&DkT8@3lN'F0"regular expressions now expressing in Java",51Testing软件测试网'@Ss&V)k'aG+D
"Java represses oracular expressions"51Testing软件测试网i^5x2Bt
};
,R	[*O t_L5k0Pattern51Testing软件测试网U-S4s_
Kg
p1 = Pattern.compile("re\\w*"),
E8K/~[xki/\%Z0p2 = Pattern.compile("Java.*");51Testing软件测试网V
~@+B'h(wo
for(int i = 0; i < input.length; i++) {
B7\.n3u&f0System.out.println("input " + i + ": " + input[i]);
i
G&s;x4s	r4[.{4X0Matcher51Testing软件测试网\
z J+V*_(I
m1 = p1.matcher(input[i]),

H%f9h)YyQt
\'?t0m2 = p2.matcher(input[i]);51Testing软件测试网#AD#B|t
E
while(m1.find())
.F \w#NX/w-f"X+P0System.out.println("m1.find() '" + m1.group() +
H0XV%x-T+G0"' start = "+ m1.start() + " end = " + m1.end());
LTIM8~
[	^U0while(m2.find())
k*E8ok
T
H0System.out.println("m2.find() '" + m2.group() +
6Ixb[lv,g|0"' start = "+ m2.start() + " end = " + m2.end());
#T1p5\;L&KU0Yu
mp0if(m1.lookingAt()) // No reset() necessary51Testing软件测试网SQ;K@cLM$X
System.out.println("m1.lookingAt() start = "
ms0c
zZy0+ m1.start() + " end = " + m1.end());
@*C
x9@
W&rz
Qc0if(m2.lookingAt())
X_/m$^db-H0System.out.println("m2.lookingAt() start = "
b0s0IY){$p"^NUZ0+ m2.start() + " end = " + m2.end());51Testing软件测试网F
t#]x:Y8CH
if(m1.matches()) // No reset() necessary51Testing软件测试网0`*kEpO/F`8qx
{
System.out.println("m1.matches() start = "
#Z0AR$J]_0+ m1.start() + " end = " + m1.end());

w9g
l6r@7xv0if(m2.matches())51Testing软件测试网j9Z1y,F7UF#o
System.out.println("m2.matches() start = "51Testing软件测试网B q
P1\!J0O&F
+ m2.start() + " end = " + m2.end());51Testing软件测试网}8YH _thr3|
}51Testing软件测试网#w#at&E[](d
monitor.expect(new String[] {51Testing软件测试网Q#D"{1Y5X@
"input 0: Java has regular expressions in 1.4",51Testing软件测试网Hp:R:]Nc,YpOG/o
"m1.find() 'regular' start = 9 end = 16",
n[?9x6O-N}:JZbW0"m1.find() 'ressions' start = 20 end = 28",
e;S^B^
X:kLJ\0"m2.find() 'Java has regular expressions in 1.4'" +
J0wY ^rJ0" start = 0 end = 35",
/Q'eN7G&H-M0"m2.lookingAt() start = 0 end = 35",
0s9?&w
[ M$W4_0"m2.matches() start = 0 end = 35",51Testing软件测试网m#h,K.P'K4tb$KqGL
"input 1: regular expressions now " +51Testing软件测试网0W;h5kAAaA.C`t
"expressing in Java",51Testing软件测试网D4Ou^%NM5O
"m1.find() 'regular' start = 0 end = 7",
za(AKKw&gZr0"m1.find() 'ressions' start = 11 end = 19",
;u9}O2p`-}MJH0"m1.find() 'ressing' start = 27 end = 34",
.H o7eSD!h@#uJ0"m2.find() 'Java' start = 38 end = 42",
/F#[/u[)Q;w[0"m1.lookingAt() start = 0 end = 7",51Testing软件测试网I(V~9\"W{	BO
"input 2: Java represses oracular expressions",51Testing软件测试网3V&D
e2b
[
"m1.find() 'represses' start = 5 end = 14",

vxeV`(f%@0"m1.find() 'ressions' start = 27 end = 35",
 M#|n-Q9h:^;|T
i0"m2.find() 'Java represses oracular expressions' " +51Testing软件测试网bYh	mm
"start = 0 end = 35",
$\#ws7T+P0"m2.lookingAt() start = 0 end = 35",51Testing软件测试网sjnF%c'R2N2@
"m2.matches() start = 0 end = 35"
6] fX,DE0});
CtHF.|3X*ihV0}
%O;C8vU4t(j1KN!u0} ///:~

//: c12:ReFlags.java
$[4F$V$pi
Jy"D0import java.util.regex.*;51Testing软件测试网eQ
f1_z5C0Q
import com.bruceeckel.simpletest.*;
n'SWTH0publicclass ReFlags {
|r9ib1B/b
e0privatestatic Test monitor = new Test();51Testing软件测试网G;dq\O3py
publicstaticvoid main(String[] args) {51Testing软件测试网,Ls(gb\e!Gu%P
Pattern p =  Pattern.compile("^java",51Testing软件测试网,Ov,l"xg)I
Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
4Y,meH3R\
wM$t/o0Matcher m = p.matcher(51Testing软件测试网
{6M
@!c+D8ok+}E"F~j
"java has regex\nJava has regex\n" +
0|9_U)Zpj0"JAVA has pretty good regular expressions\n" +51Testing软件测试网yJ@Q9v3hFM
"Regular expressions are in Java");51Testing软件测试网;F$f'^.Z{
P2q1lS%D
while(m.find())
*VC
[+f
S_C0System.out.println(m.group());51Testing软件测试网	no8b,m&A,k[q
monitor.expect(new String[] {51Testing软件测试网%G,d?
m3B,b~7J,S
"java",51Testing软件测试网:i;S(|9d$^tb!d
"Java",

AcF6[*`4VH(BZ0"JAVA"51Testing软件测试网,GKC_[(T#g
});
^w-~0|A"pj6E;w p0}
g0Rv'M3B;l0} ///:~

//: c12:TheReplacements.java
yn+^tz&IO0import java.util.regex.*;
}"o&ubK6je0import java.io.*;
gAwT1z^w3H@0import com.bruceeckel.util.*;51Testing软件测试网YO`gD
import com.bruceeckel.simpletest.*;51Testing软件测试网Q1~D@zK
/*! Here's a block of text to use as input to51Testing软件测试网
m}l$X#^@
the regular expression matcher. Note that we'll
(p&|CaA|+U~
r0first extract the block of text by looking for51Testing软件测试网p6j.s(yU+}zs'Zg
the special delimiters, then process the51Testing软件测试网*J(TlsM3a4h[K
extracted block. !*/
Nl{;Yypm0publicclass TheReplacements {
X-B
[yu-TMu0privatestatic Test monitor = new Test();
(c1_@"A&Kf5J-d0publicstaticvoid main(String[] args) throws Exception {
G
?
`	t#I0String s = TextFile.read("TheReplacements.java");
!Mi{-rB8A?1R$S
P0// Match the specially-commented block of text above:51Testing软件测试网z
CV$Tk
Matcher mInput =
$m7C%B\
n,{$g0Pattern.compile("/\\*!(.*)!\\*/", Pattern.DOTALL)51Testing软件测试网;P/xAz^(X\Y3|O
.matcher(s);
'P,B5T&o'B0paeM]0if(mInput.find())

YL6hR/@&J2o*H0s = mInput.group(1); // Captured by parentheses51Testing软件测试网dy(HpS3M3xe$e
a
// Replace two or more spaces with a single space:
k+hT:_!{F8I0s = s.replaceAll(" {2,}", " ");
DE2]|'F0// Replace one or more spaces at the beginning of each51Testing软件测试网p8\;}!dmiH#a
// line with no spaces. Must enable MULTILINE mode:51Testing软件测试网P+eWGO$j(F;QKO
s = s.replaceAll("(?m)^ +", "");51Testing软件测试网!{
d%h0Y,QA~
System.out.println(s);
,[[`K8u`4M3\U0s = s.replaceFirst("[aeiou]", "(VOWEL1)");

V"mv7mIp9oy'[0StringBuffer sbuf = new StringBuffer();
#mD6FLe0Pattern p = Pattern.compile("[aeiou]");
Y`
V(qI|B
LcnO0Matcher m = p.matcher(s);51Testing软件测试网"{$q8V/OrdU
// Process the find information as you51Testing软件测试网EW3\\'A
c(ow
// perform the replacements:
xzj2RY,M0while(m.find())51Testing软件测试网3s^
`0{r#^2}5|
j
m.appendReplacement(sbuf, m.group().toUpperCase());51Testing软件测试网
~f&DL.mG.P^E
// Put in the remainder of the text:51Testing软件测试网|7x5t8_d"w
m.appendTail(sbuf);
I;uQ],j2jjfBp0System.out.println(sbuf);51Testing软件测试网t$M'm|&q
monitor.expect(new String[]{
W1qoikx3l0"Here's a block of text to use as input to",
9y7bC*n	aDjc2V0"the regular expression matcher. Note that we'll",51Testing软件测试网:Qx s#z	EG
"first extract the block of text by looking for",51Testing软件测试网 dx
_zO$w2R8x*C`9`
L
q
"the special delimiters, then process the",
|vIR3yg"D0"extracted block. ",51Testing软件测试网9I+T@y5Rl
"H(VOWEL1)rE's A blOck Of tExt tO UsE As InpUt tO",
%^&I2z1iY0"thE rEgUlAr ExprEssIOn mAtchEr. NOtE thAt wE'll",
Zr(l0c
]y1JS.f0"fIrst ExtrAct thE blOck Of tExt by lOOkIng fOr",
	L2Juy	L;Kix|0"thE spEcIAl dElImItErs, thEn prOcEss thE",51Testing软件测试网	xOSf
Izen
I?%k8A
"ExtrActEd blOck. "51Testing软件测试网%Mfll,[\MYU
});51Testing软件测试网QU
H'E%x)Z9Af	G6u@Q
}51Testing软件测试网!sJ-h:A
r)M-Kq
X
} ///:~

//: c12:ReplacingStringTokenizer.java51Testing软件测试网PZp&eS|f\
import java.util.regex.*;51Testing软件测试网8J!X
o;S)n
import com.bruceeckel.simpletest.*;51Testing软件测试网+^@7y*`5YG}
import java.util.*;51Testing软件测试网)Y!|KJ+AZ
publicclass ReplacingStringTokenizer {
L$}e-\	g.w-f.LT0privatestatic Test monitor = new Test();
]PRtt(X	_0publicstaticvoid main(String[] args) {51Testing软件测试网-[frD'[{
u3bOhm,gz4j
String input = "But I'm not dead yet! I feel happy!";
7h!p#P(rObi6J0StringTokenizer stoke = new StringTokenizer(input);51Testing软件测试网,t2D}#v4O G
while(stoke.hasMoreElements())51Testing软件测试网o@@u
l
System.out.println(stoke.nextToken());
 }KA(]j0o5SFx0System.out.println(Arrays.asList(input.split(" ")));
%cN$U"Di0monitor.expect(new String[] {
t%T4NWj'|0"But",
%\^fSc5vP#H0"I'm",
)D+U4w6M!M6z^0"not",51Testing软件测试网(rs3W~gGs9P
"dead",
5\~Zo]!fS"e_0"yet!",
C9@C&X%c"h-b/c1j0"I",
,j\Pl7[g?-C0"feel",51Testing软件测试网R6L5XH^m#tA
"happy!",51Testing软件测试网J$D!V3Pc:u1@
"[But, I'm, not, dead, yet!, I, feel, happy!]"
*We0m.n9FfY/Q0});
6JU0e4^5L3_y0}
]b
q5iv } @ d0v(gr0} ///:~