java正则表达式

//: c12:TestRegularExpression.java

{V^H+n#_0// Allows you to easly try out regular expressions.
3qE,X,sj?Ts0\0// {Args: abcabcabcdefabc "abc+" "(abc)+" "(abc){2,}" }51Testing软件测试网!myF^n#N
import java.util.regex.*;51Testing软件测试网X*@N
t.xE/k/m9E
publicclass TestRegularExpression {
)qq_)SG]6k0publicstaticvoid main(String[] args) {
6\9Y%_D3d'Cb9P7[3v5y0if(args.length < 2) {51Testing软件测试网	G9r
K^.O'D+vH
System.out.println("Usage:\n" +51Testing软件测试网%@*xkF
V
KV
"java TestRegularExpression " +51Testing软件测试网5J;U9@Lo5L
"characterSequence regularExpression+");
2ZHp1mWi)t^0System.exit(0);

psm+CE0`0}51Testing软件测试网0I}zUT-M
System.out.println("Input: \"" + args[0] + "\"");
\+`pvZ5x0for(int i = 1; i < args.length; i++) {51Testing软件测试网T{9dU$m8CGm$X
System.out.println(
-{[
B\8x3u0"Regular expression: \"" + args[i] + "\"");51Testing软件测试网:@
yi`	u
Pattern p = Pattern.compile(args[i]);
xL
VZ@e0Matcher m = p.matcher(args[0]);51Testing软件测试网9FA'`_!Mx
while(m.find()) {
%`
E3GaW6^F0System.out.println("Match \"" + m.group() +51Testing软件测试网F"zl(kwD)h
"\" at positions " +

g.j'lgl/n0m.start() + "-" + (m.end() - 1));51Testing软件测试网6T6[lIg	zi
}51Testing软件测试网`crQO5^
oD
}51Testing软件测试网7Z@b?.}EiNP
}
+ke5K TU*~c-N @V Z
`-S0} ///:~

//: c12:FindDemo.java51Testing软件测试网DLKc
@v7Q'fA
import java.util.regex.*;51Testing软件测试网}p.s+_	Dr
import com.bruceeckel.simpletest.*;51Testing软件测试网za(^B\(j
import java.util.*;51Testing软件测试网ay@c?mN
publicclass FindDemo {
DOe"t?.T~0privatestatic Test monitor = new Test();
0J6H2S
}F-SX0publicstaticvoid main(String[] args) {
Ww9@P{.hO0Matcher m = Pattern.compile("\\w+")51Testing软件测试网br
G;U-t4Cn;RQ
.matcher("Evening is full of the linnet's wings");
^U?#`P_]
W	V}0while(m.find())
/}4|,u4U'Z1X?0System.out.println(m.group());51Testing软件测试网CuoV
X;e+T6e+@
int i = 0;51Testing软件测试网!m.hK	B`C[Y.N)\ZP
while(m.find(i)) {51Testing软件测试网;OZ`_APx
System.out.print(m.group() + " ");51Testing软件测试网'r*L9j2`+p;a"Tfn:RM
i++;51Testing软件测试网
Mt#hB/o:n;y5?	l
}
3d?;ZMYH0monitor.expect(new String[] {51Testing软件测试网)hx,s5n1T9^7f5uKeNT)s
"Evening",
/Ih&@@~	K%\'No&@4R0"is",
W)o ye8V2|8y8~0"full",
9v|Y3W!pU3Pk0"of",
:e8q'^jg5\%sMw0"the",
o,x^Sf#q0"linnet",
5nxVJz5K$Rd0"s",
8Z![L5{
W0"wings",51Testing软件测试网aTb$QmJ!c
"Evening vening ening ning ing ng g is is s full " +
IQ+r4['V5Q'~
J0"full ull ll l of of f the the he e linnet linnet " +
(^:j"V?'[v;m],bE0"innet nnet net et t s s wings wings ings ngs gs s "51Testing软件测试网
Qd)ONs6N)GV u
z,sf
});
NPr)e'x
LA^Y0}
(^&G*ple0} ///:~

//: c12:Groups.java51Testing软件测试网U	^#Sa	ivNf
import java.util.regex.*;51Testing软件测试网{'eq-\	T"I\b
import com.bruceeckel.simpletest.*;51Testing软件测试网.y2H8}H{)l5P
z'pt
publicclass Groups {
3z-MK#Up0privatestatic Test monitor = new Test();
E,|2r%@-f$@!S(L0staticpublicfinal String poem =51Testing软件测试网4\A:VB~._g_0E
"Twas brillig, and the slithy toves\n" +51Testing软件测试网jR-`2W1NM8B2d
K/d,S[
"Did gyre and gimble in the wabe.\n" +
ga\ M9An7E0"All mimsy were the borogoves,\n" +
G? k#NuG-q@0"And the mome raths outgrabe.\n\n" +51Testing软件测试网h2Jiyp)X5Fme
"Beware the Jabberwock, my son,\n" +
!O'rrW3Y$i1L?BW@V0"The jaws that bite, the claws that catch.\n" +51Testing软件测试网:~H3UpL	p
xA`
"Beware the Jubjub bird, and shun\n" +51Testing软件测试网\5LZQ
^fD
"The frumious Bandersnatch.";
'wV5_'UJ3z$t0publicstaticvoid main(String[] args) {
T'tV(F}0t8]j0Matcher m =
+^dMr`` H0Pattern.compile("(?m)(\\S+)\\s+((\\S+)\\s+(\\S+))$")51Testing软件测试网%b}.~
u"N ieE
.matcher(poem);51Testing软件测试网y%P Q+U(LQV4D
while(m.find()) {
#Z'Qk*Z7u0for(int j = 0; j <= m.groupCount(); j++)51Testing软件测试网0e7qa4y1j:Rep
System.out.print("[" + m.group(j) + "]");
1qW]i8j,ne7e0System.out.println();51Testing软件测试网*uZPsm+D L/h
}51Testing软件测试网%RV'Bj%C
monitor.expect(new String[]{51Testing软件测试网/k)o[+^H+ex;|
T6ea
"[the slithy toves]" +
/S&X	D/O"DTKr0"[the][slithy toves][slithy][toves]",51Testing软件测试网C-W!Ri$t'I/|
"[in the wabe.][in][the wabe.][the][wabe.]",51Testing软件测试网,x[NV1Y
"[were the borogoves,]" +
A
fLe7Jy
U1^;D0"[were][the borogoves,][the][borogoves,]",51Testing软件测试网?A
It!V-c
^2w
M
"[mome raths outgrabe.]" +
h,m
Et~G0P0"[mome][raths outgrabe.][raths][outgrabe.]",
2jS2Xg9C0"[Jabberwock, my son,]" +51Testing软件测试网Z6XO;vT
d/ZN
"[Jabberwock,][my son,][my][son,]",51Testing软件测试网
fx2^#I!GI.[c
"[claws that catch.]" +51Testing软件测试网NwK(D%U*W
"[claws][that catch.][that][catch.]",51Testing软件测试网4R%e-GY(k9a1C
"[bird, and shun][bird,][and shun][and][shun]",51Testing软件测试网,HxE&EJZL.k
"[The frumious Bandersnatch.][The]" +
]3yhu%Sv/wBtj+B2}+}0"[frumious Bandersnatch.][frumious][Bandersnatch.]"51Testing软件测试网Q3R;st*o8O9ZnSA[
});
mG~ m~*Z0}51Testing软件测试网:v5R+_`:`;t8`G Q;Oj
} ///:~

//: c12:StartEnd.java51Testing软件测试网U}:`R&sn
import java.util.regex.*;51Testing软件测试网!BTbn/]9W+Ow(e
import com.bruceeckel.simpletest.*;
"p
Ku_+h4J&R0publicclass StartEnd {
H	w4C9F
WM:{~0privatestatic Test monitor = new Test();
"`(wE*`+j	KD,J;l#f0publicstaticvoid main(String[] args) {51Testing软件测试网-Y7{(Q+pVw*Nz.r%n	b:L
String[] input = new String[] {51Testing软件测试网FuJH&I+M;j
"Java has regular expressions in 1.4",51Testing软件测试网&f(k1W;Vi
ON
"regular expressions now expressing in Java",51Testing软件测试网`F
cs/`i1ZfL
"Java represses oracular expressions"51Testing软件测试网*Ds3Aze2\%Oek
};51Testing软件测试网.Z9z3}6R!qC_
Pattern
u0P
sao
AJ8i0p1 = Pattern.compile("re\\w*"),
9sY{#GX!q/_R0p2 = Pattern.compile("Java.*");51Testing软件测试网.W'c
p$g/T:z
for(int i = 0; i < input.length; i++) {
Gx4E5Nh)Qt FE0System.out.println("input " + i + ": " + input[i]);51Testing软件测试网(o,@Vjk"sYa
Matcher
&~'Y]O,\T%N0m1 = p1.matcher(input[i]),
c},e~ZEX+q
Q0m2 = p2.matcher(input[i]);51Testing软件测试网	Dg*S6W6mRbN!f
S
while(m1.find())
#Qv8JkoKt7?0System.out.println("m1.find() '" + m1.group() +
6kOG V4vBb
W0"' start = "+ m1.start() + " end = " + m1.end());51Testing软件测试网\)C&N{;j
while(m2.find())51Testing软件测试网-LBl"zN'L
X
q4P]
YA
System.out.println("m2.find() '" + m2.group() +
0U^
Es)g0"' start = "+ m2.start() + " end = " + m2.end());
7s2p,T0]PB!t
dzu0if(m1.lookingAt()) // No reset() necessary
-sE+fj%@
yg0System.out.println("m1.lookingAt() start = "
7c;XOoJt6K0+ m1.start() + " end = " + m1.end());51Testing软件测试网4\*X0J D7Nd7g#O o
if(m2.lookingAt())
/yQ;B*N*m#s5A
t0System.out.println("m2.lookingAt() start = "
p
^8uB-B6ofe6n3~:}0+ m2.start() + " end = " + m2.end());51Testing软件测试网;`[c0Ep
if(m1.matches()) // No reset() necessary51Testing软件测试网3v'i*~Yh
System.out.println("m1.matches() start = "
#~D1`}-~q0+ m1.start() + " end = " + m1.end());
_%}5t6Yq
u+s.A0if(m2.matches())
|[-tx8m"k`[p'nF0System.out.println("m2.matches() start = "51Testing软件测试网?
G?3i	}D0o${
+ m2.start() + " end = " + m2.end());51Testing软件测试网O0r6r|r
X]Q!AF
}
$b^E9I|Vi^p%K0monitor.expect(new String[] {

St'd3]\gEE0"input 0: Java has regular expressions in 1.4",51Testing软件测试网&cKUwr?z
"m1.find() 'regular' start = 9 end = 16",
~%^!}um*{l0"m1.find() 'ressions' start = 20 end = 28",51Testing软件测试网xWbw5Ipi!m!\
"m2.find() 'Java has regular expressions in 1.4'" +51Testing软件测试网}*{o9jP7i
" start = 0 end = 35",
5\zB/Sow0"m2.lookingAt() start = 0 end = 35",
q_)x5q[L.hP|0"m2.matches() start = 0 end = 35",
i6g7\Q/P7Q(T0"input 1: regular expressions now " +51Testing软件测试网3H1nl;DQ s
r$Tl
"expressing in Java",51Testing软件测试网`$i4D:t&Y,E&T3V
"m1.find() 'regular' start = 0 end = 7",51Testing软件测试网^X2jVppf
"m1.find() 'ressions' start = 11 end = 19",

\)a/Y+c*LS0"m1.find() 'ressing' start = 27 end = 34",51Testing软件测试网:U/L4Uh
U
"m2.find() 'Java' start = 38 end = 42",51Testing软件测试网7yo(kK	u0Hk
"m1.lookingAt() start = 0 end = 7",
f
v2P"?7Gdv&xo]r0"input 2: Java represses oracular expressions",
.Yw#v8n7?0"m1.find() 'represses' start = 5 end = 14",51Testing软件测试网U7@M,a5HmV*J*|!m
"m1.find() 'ressions' start = 27 end = 35",51Testing软件测试网*Z_}AKb&B0c
"m2.find() 'Java represses oracular expressions' " +
7~G|9~xm!FQ4r(?_0"start = 0 end = 35",
%ZrvA$Akj0"m2.lookingAt() start = 0 end = 35",51Testing软件测试网r
[
Vyn-{,} qM$k
"m2.matches() start = 0 end = 35"51Testing软件测试网%x/iL1t!YK3\?$]{
});

xBT\2p+Y0}51Testing软件测试网8Z	GYew?)}(Ue*E
} ///:~

//: c12:ReFlags.java
benWF^2?k0import java.util.regex.*;
4Ox	h:CX0import com.bruceeckel.simpletest.*;
-dnUN8~0publicclass ReFlags {
w
h6u-s2m0privatestatic Test monitor = new Test();51Testing软件测试网7rl)t)OXgO+F%Jg9^
publicstaticvoid main(String[] args) {51Testing软件测试网6A!C3Pil}6x
Pattern p =  Pattern.compile("^java",
n,n^0t6J#iPhx"b0Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);51Testing软件测试网3F2GtE*EA8W/Qn8d+gM
Matcher m = p.matcher(51Testing软件测试网$~X%g-kQ6JU8lRN
"java has regex\nJava has regex\n" +51Testing软件测试网,YUy1`%M2]2[
"JAVA has pretty good regular expressions\n" +
0?$`!\5P*I"Z
\Sb0"Regular expressions are in Java");
lw	Pwi3E"\0while(m.find())51Testing软件测试网!rSD
i7\P T
System.out.println(m.group());
;N)LEvSu!LpYs
{0monitor.expect(new String[] {
+]
|uM;b6a0"java",51Testing软件测试网
v*h#|5w}+mG
w-Hn
"Java",51Testing软件测试网1K]Lm,Lp1i"G
"JAVA"51Testing软件测试网BM'l
@"\
});51Testing软件测试网/[m{d-{sJ
}
:I)XX/Mv"t0} ///:~

//: c12:TheReplacements.java51Testing软件测试网RJ9X)BC!dn
import java.util.regex.*;51Testing软件测试网D3`vI1bpt)l^*])F9]
import java.io.*;51Testing软件测试网,PnL	C*[W,W
import com.bruceeckel.util.*;51Testing软件测试网`%O'B+gEI5b]	XY
import com.bruceeckel.simpletest.*;
{(Bi,T}o6HS
j.v0/*! Here's a block of text to use as input to
Hh8jM+U`1@]&M(U0the regular expression matcher. Note that we'll
5fi%[+mw|pj0first extract the block of text by looking for
S;v#n
lp]0the special delimiters, then process the
sX9_-@.}yN@P0extracted block. !*/
R4R@+[X/Z?D*Cg0publicclass TheReplacements {
['\f6ig`|5\0privatestatic Test monitor = new Test();51Testing软件测试网)];C:M
pH$T(jQe
publicstaticvoid main(String[] args) throws Exception {51Testing软件测试网djl5w3v8jD^o
String s = TextFile.read("TheReplacements.java");51Testing软件测试网!`Fp'z3t
// Match the specially-commented block of text above:
:n.vo~U0Matcher mInput =51Testing软件测试网C2W
{~SEH
Pattern.compile("/\\*!(.*)!\\*/", Pattern.DOTALL)
f1V
|A3D(P6A0.matcher(s);51Testing软件测试网8R7v
mj4V
if(mInput.find())
2]E&hU.djs"h0s = mInput.group(1); // Captured by parentheses51Testing软件测试网!U&m O$P^2a
// Replace two or more spaces with a single space:51Testing软件测试网V1w]C3y4u
YLp
s = s.replaceAll(" {2,}", " ");
r-m2b4x	}*a,FLh]'\[H0// Replace one or more spaces at the beginning of each51Testing软件测试网'rC!L,?"A4]
// line with no spaces. Must enable MULTILINE mode:51Testing软件测试网UZ"t#T*_6z-]Hz
s = s.replaceAll("(?m)^ +", "");
T4mP?.@!n6he0System.out.println(s);
y
mq%p	Y3{;q0s = s.replaceFirst("[aeiou]", "(VOWEL1)");51Testing软件测试网 XPI
x3\4i/`$b]:[
StringBuffer sbuf = new StringBuffer();
4Zm2@$t!c)lN0Pattern p = Pattern.compile("[aeiou]");51Testing软件测试网/Y
w)A
\A9P
Matcher m = p.matcher(s);51Testing软件测试网
f+S$i-xDooj
// Process the find information as you51Testing软件测试网2g:L6BQE:ZMN
// perform the replacements:51Testing软件测试网sH!vT6DL4T6E7h
while(m.find())
ye'W!e(t*P-R0m.appendReplacement(sbuf, m.group().toUpperCase());

__BX?n,P0// Put in the remainder of the text:
R;AB;I6j0m.appendTail(sbuf);
L_E	x7T:O[0System.out.println(sbuf);
nan*yQ6e2a/i;la
H0monitor.expect(new String[]{51Testing软件测试网3yi+TM5S
"Here's a block of text to use as input to",
7O"EC7~TA0"the regular expression matcher. Note that we'll",51Testing软件测试网*cH*w-G@
"first extract the block of text by looking for",
X
]D:hc|.X6V0"the special delimiters, then process the",51Testing软件测试网"|1oLk`p/c6S
"extracted block. ",
_aeE1\uK3q0"H(VOWEL1)rE's A blOck Of tExt tO UsE As InpUt tO",51Testing软件测试网
i5d#V1l1Uq
"thE rEgUlAr ExprEssIOn mAtchEr. NOtE thAt wE'll",51Testing软件测试网'\!O,zKWi
"fIrst ExtrAct thE blOck Of tExt by lOOkIng fOr",51Testing软件测试网G&zN.dq[
"thE spEcIAl dElImItErs, thEn prOcEss thE",
,}gn
_&f4t!r9L0"ExtrActEd blOck. "51Testing软件测试网[(IG"L-R)?	i
});
(z;t'p*s)e0}51Testing软件测试网Yh
P g9u [
} ///:~

//: c12:ReplacingStringTokenizer.java51Testing软件测试网jz6Fj6X/To4X
import java.util.regex.*;
_&T%Y4}L+{l?8W;^Y0import com.bruceeckel.simpletest.*;
XS3L$Y1g0import java.util.*;51Testing软件测试网;^mq+z9K
publicclass ReplacingStringTokenizer {51Testing软件测试网SF(aP/J5c
y#N
privatestatic Test monitor = new Test();
eHaD4M.}Zn0publicstaticvoid main(String[] args) {
iDa2C6T~?u+x(]0String input = "But I'm not dead yet! I feel happy!";
{5TYr ]w^-kr0StringTokenizer stoke = new StringTokenizer(input);
'e-Lm#iA
m?0while(stoke.hasMoreElements())51Testing软件测试网N9z+a"?9o%a6^ErF
System.out.println(stoke.nextToken());51Testing软件测试网5`I^MPB+h
B{a
System.out.println(Arrays.asList(input.split(" ")));
*ry)~
s2|0monitor.expect(new String[] {51Testing软件测试网/bN;l7U sx]%S
"But",
X;D9t
U%QF-H+pm8a6lu0"I'm",51Testing软件测试网
N3Xgn,w$\8kQ-n
"not",51Testing软件测试网YS,P+OP0dP7J
Y
"dead",51Testing软件测试网+f5J8zD8c,X"D
"yet!",51Testing软件测试网zDY
kp!wK.R0L
"I",

JE` [Z}6p0"feel",
+Rq \n?^U4j0"happy!",51Testing软件测试网.@t'hltO
"[But, I'm, not, dead, yet!, I, feel, happy!]"
;Q%{%h2_3q;F%z%f1w0});
eKH/Kff0}
0m'SW&WP-DD2n|0} ///:~