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[JAVA]用Java实现的各种排序

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用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 ``\i58K{e  
插入排序: n+q!l&&  
OJ5#4qJ[  
package org.rut.util.algorithm.support; <;m<8RjX  
4UvZ)^r  
import org.rut.util.algorithm.SortUtil; MWpQ^dL_  
/** 4DOH`6#an  
* @author treeroot "ZsOd>[/  
* @since 2006-2-2 X4Ic;  
* @version 1.0 *><F'   
*/ ?+W 9az]+  
public class InsertSort implements SortUtil.Sort{ VZymM<O  
y8!4q  
/* (non-Javadoc) p,>5\Zre~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L`p4->C9A  
*/ O  %!!w  
public void sort(int[] data) { a>]uU*Xm  
int temp; vMt/u?oB  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); [~#WG/!:  
} _R13f@NWB:  
} fS[,vPl  
} kG@@ot" n  
*|>d  
} vV6I0  
jW3!6*93  
冒泡排序: Xr$J9*Jk-  
eWtZ]kB  
package org.rut.util.algorithm.support; -vR5BMy=  
'\ey<}?5V  
import org.rut.util.algorithm.SortUtil; A1D^a,  
9m<jcxla$  
/** PHXZ=A+  
* @author treeroot 4@n1Uk  
* @since 2006-2-2 `c5"d  
* @version 1.0 Q$1bWUS&  
*/ Raxrb=7  
public class BubbleSort implements SortUtil.Sort{ iAa.}CI,zB  
g Vv>9W('  
/* (non-Javadoc) 4C-jlm)V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3z)Kz*xr  
*/ UA8GL D9  
public void sort(int[] data) { 3U.88{y  
int temp; &U raUl  
for(int i=0;i for(int j=data.length-1;j>i;j--){ oe |)oTv  
if(data[j] SortUtil.swap(data,j,j-1); 1H@>/QC  
} ,dov<U[ia  
} D2!X?"[ P  
} ,5kKimTt  
} 7;sj%U^'l  
=K{"{5Wb  
} 5eoska#y   
/ !Wu D\B  
选择排序: }Q?c"H!/  
f3&[#%  
package org.rut.util.algorithm.support; iZNts%Y]  
D 38$`j  
import org.rut.util.algorithm.SortUtil; Y/ >&0wj)d  
X4AyX.p  
/** ZP *q4:  
* @author treeroot sCis4gX.]  
* @since 2006-2-2 )5%'.P>  
* @version 1.0 'EF9Zt8  
*/ 5b/|!{  
public class SelectionSort implements SortUtil.Sort { lB4GU y$  
TRQF^P3o  
/* 0]=i}wL 8  
* (non-Javadoc)  , ^;)<[  
* V9( @Y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v:o({Y 1Aq  
*/ X*39c b(b  
public void sort(int[] data) { ng:9 l3 x  
int temp; ph[#QHB  
for (int i = 0; i < data.length; i++) { wS+ ^K  
int lowIndex = i; NufLzg{  
for (int j = data.length - 1; j > i; j--) { sz {e''q  
if (data[j] < data[lowIndex]) { H]p!\H  
lowIndex = j; , GY h9  
} 3k# /{Z  
} `'c_=<&n  
SortUtil.swap(data,i,lowIndex); x&9hI  
} C\nhqkn  
} 6morum  
2f:Eof(B  
} }i`PGx  
{Jx4xpvPo  
Shell排序: SWQ5fcPu  
tqeZ#w7  
package org.rut.util.algorithm.support; aj}sc/Qa  
VUYmz)m5  
import org.rut.util.algorithm.SortUtil; Q7$.LEioN  
@,u/w4  
/** h0-hT   
* @author treeroot /D^"X 4!"  
* @since 2006-2-2 :GW&O /Yo  
* @version 1.0 1_ C]*p  
*/ %1O[i4s:-  
public class ShellSort implements SortUtil.Sort{ H5]^ 6 HwX  
2eC(Ijq[a  
/* (non-Javadoc) !V\Q<So<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T G{k0cdOT  
*/ t{FlB!jv  
public void sort(int[] data) { ;._7jFj.  
for(int i=data.length/2;i>2;i/=2){ 4Hn`'+b  
for(int j=0;j insertSort(data,j,i); no] z1D  
} wUQw!%?>  
} 0iK;Egwm  
insertSort(data,0,1); {h2TD P  
} +$(2:S*r  
K+8-9$w6  
/** Q7C;1aO  
* @param data 4*mS y  
* @param j 6{+{lBm=y  
* @param i \eb|eN0i  
*/ &q~:~   
private void insertSort(int[] data, int start, int inc) { P*@2.#oO  
int temp; ~L_hZso4  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ;3@YZM'wt  
} CQr<N w  
} $w0lrh[+  
} YJ/zU52JK~  
oY|,GvCnK  
} f7~9|w&  
s^|.Zr;,>  
快速排序: ^Q ps> A(  
Cc<,z*T  
package org.rut.util.algorithm.support; d,tU#N{Q6  
mBJeqG  
import org.rut.util.algorithm.SortUtil; HU-QDp%*r7  
xIGfM>uq  
/** ''^Y>k  
* @author treeroot "/6:6`J  
* @since 2006-2-2 rs*Fy@  
* @version 1.0 K ryo}  
*/ ZA9sTc[ g  
public class QuickSort implements SortUtil.Sort{ )d-.M  
80Y\|)  
/* (non-Javadoc) "zY](P  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /c-r  
*/ ^/ =#UQ*k  
public void sort(int[] data) { b}w C|\s  
quickSort(data,0,data.length-1); k({\/t3i  
} 3 M10fI?  
private void quickSort(int[] data,int i,int j){ 8kt5KnD2  
int pivotIndex=(i+j)/2; Ev2HGU[  
file://swap }%`~T>/  
SortUtil.swap(data,pivotIndex,j); )T66<UDK|  
]I.n\2R]om  
int k=partition(data,i-1,j,data[j]); d90Z,nex  
SortUtil.swap(data,k,j); 7GS V  
if((k-i)>1) quickSort(data,i,k-1); G #T<`>T  
if((j-k)>1) quickSort(data,k+1,j); B_l{<  
m6yIR6H  
} 8W+gl=C~  
/** JwRF(1_sM  
* @param data eo!zW  
* @param i jWO/ xX  
* @param j GK}'R=   
* @return M9f?q.Bv  
*/ !k(_PM  
private int partition(int[] data, int l, int r,int pivot) { {(#%N5%  
do{ Hb(B?!M)  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 16EVl~LN  
SortUtil.swap(data,l,r);  6vTo*8D  
} ,prF6*g+WE  
while(l SortUtil.swap(data,l,r); Q2];RS3.  
return l; qcJft'>F  
} Op? OruT[  
$1zvgep  
} 4E[!,zvl  
BH@)QVs-  
改进后的快速排序: cx$Gic:4  
1b>C<\  
package org.rut.util.algorithm.support; #4h+j%y[H  
p|/j4@-h  
import org.rut.util.algorithm.SortUtil; NHgjRP z"  
n*'<uKpM  
/** dj&}Gedy  
* @author treeroot ZC 4*{  
* @since 2006-2-2 iH2n.M "  
* @version 1.0 m&0"<V!H/B  
*/ "SoHt]%#  
public class ImprovedQuickSort implements SortUtil.Sort { 5ZPzPUa8~  
Q2%QLM:.,  
private static int MAX_STACK_SIZE=4096; ^t*x*m8  
private static int THRESHOLD=10; !lmWb-v%36  
/* (non-Javadoc) qxJQPz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9H]Lpi^OH  
*/ =}fd6ea(o  
public void sort(int[] data) { @C-dG7U.P  
int[] stack=new int[MAX_STACK_SIZE]; Dli^2hD  
Ld,5iBiO:  
int top=-1; B 2 .q3T  
int pivot; ;#) mLsl  
int pivotIndex,l,r; JH]K/sC>  
|m?vVLq  
stack[++top]=0; Lj %{y.Rj  
stack[++top]=data.length-1; q 'a  
"?GebA  
while(top>0){ ZDYJhJ.  
int j=stack[top--]; Zz |MIGHm  
int i=stack[top--]; Bl1Z4` 3  
rn:!dV[  
pivotIndex=(i+j)/2; 8g7,2f/ }  
pivot=data[pivotIndex]; kK~IwA  
?vGf fMm  
SortUtil.swap(data,pivotIndex,j); 5lJ )(|_  
?68uS;  
file://partition :Ze+%d=  
l=i-1; :y,v&Kk#T  
r=j; 8Chu"PM%-J  
do{ Ei@M$Fd  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); hvt@XZT  
SortUtil.swap(data,l,r); m>e3vu  
} dYojm1MQ  
while(l SortUtil.swap(data,l,r); ;}.Kb  
SortUtil.swap(data,l,j); {sv{847V  
l t]B#, '  
if((l-i)>THRESHOLD){ F X1ZG!  
stack[++top]=i; f|aDTWF  
stack[++top]=l-1; VzRx%j/i  
} j%*7feSNC  
if((j-l)>THRESHOLD){ D;F{1[s(  
stack[++top]=l+1; fd8#Ng"1  
stack[++top]=j; %xyX8c{sP  
} jB^OP1  
"] -],K  
} PI?j_8  
file://new InsertSort().sort(data); FF Gqa&  
insertSort(data); bYh9sO/l  
} zyN (4  
/** EZ(^~k=I  
* @param data }Ewo_P&`  
*/ SLk2X;c]o  
private void insertSort(int[] data) { )3z]f2  
int temp; dyFKxn`,  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); qG >DTKIU  
} I8op>^N"  
} jlKGXD)Q[  
} U06o ;s(  
EH+~].PJd  
} .1*DR]^`  
#DP7SO  
归并排序: 2Q$\KRE  
f'dK73Xof  
package org.rut.util.algorithm.support; 7-9;PkGG.A  
=!-5+I#e  
import org.rut.util.algorithm.SortUtil; ~ |,e_ zA  
,R-Y~+!  
/** h <[+HsI  
* @author treeroot `:-J+<`  
* @since 2006-2-2 n*qN 29sx  
* @version 1.0 abY0)t  
*/ cvAtwQ'  
public class MergeSort implements SortUtil.Sort{ }w!ps{*  
":d*dl  
/* (non-Javadoc) j/<??v4F4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :?r*p>0$  
*/ A1,4kqmE  
public void sort(int[] data) { B$`lY DqaG  
int[] temp=new int[data.length]; gf$HuCh|  
mergeSort(data,temp,0,data.length-1); -%uy63LbHF  
} 5&4F,v[zp  
yCM{M  
private void mergeSort(int[] data,int[] temp,int l,int r){ 4&}\BU*  
int mid=(l+r)/2; dB|Te"6  
if(l==r) return ; u2`xC4>c  
mergeSort(data,temp,l,mid); 8g5V,3_6  
mergeSort(data,temp,mid+1,r); gB CC  
for(int i=l;i<=r;i++){ {>.>7{7  
temp=data; S+*cbA{J|  
} 4IGxI7~27#  
int i1=l; ~440# kj<  
int i2=mid+1; @&/\r 7 '  
for(int cur=l;cur<=r;cur++){ ?2~U2Ir]:  
if(i1==mid+1) 8SD}nFQ  
data[cur]=temp[i2++]; =O^7TrM  
else if(i2>r) $k(9 U\y-  
data[cur]=temp[i1++]; ofEqvoi@  
else if(temp[i1] data[cur]=temp[i1++]; {qAu/ixp  
else tvWH04T  
data[cur]=temp[i2++]; KHJ=$5r)  
} mW$ot.I  
} -iQsi4  
"<dN9l>  
} A. Nz_!  
*Pb.f  
改进后的归并排序: pB'x_z  
5K(n3?1z)  
package org.rut.util.algorithm.support; ;2W2MZ!TF  
RUrymkHFB  
import org.rut.util.algorithm.SortUtil; $u,G Vq~  
"=`~iXT{e  
/** 0e9A+&r  
* @author treeroot w:tGPort  
* @since 2006-2-2 DM/hcY$MW  
* @version 1.0 Y<ElJ>A2I  
*/ $PfV<Yj'B  
public class ImprovedMergeSort implements SortUtil.Sort { >DmRP7v   
chwh0J;  
private static final int THRESHOLD = 10; vadM1c*z  
0O ['w<_  
/* j[T%'%  
* (non-Javadoc) er\:U0fr#@  
* #HcI4j:s!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qi[(*bFK7  
*/ 'Fzuc^G(d  
public void sort(int[] data) { kOM-  
int[] temp=new int[data.length]; LI$L9eNv;Y  
mergeSort(data,temp,0,data.length-1); )O-sWh4  
} F0: &>'}  
3&'R1~Vh  
private void mergeSort(int[] data, int[] temp, int l, int r) { Cs;<'[_?YO  
int i, j, k; NQ3|\<Wt  
int mid = (l + r) / 2; i~AJ.@ #  
if (l == r) AuM:2N2  
return; 'qlxAYw<f  
if ((mid - l) >= THRESHOLD) EreAn  
mergeSort(data, temp, l, mid); iDvpXn  
else h&'J+b  
insertSort(data, l, mid - l + 1); A@ { !:_55  
if ((r - mid) > THRESHOLD) ][ N) 2_^M  
mergeSort(data, temp, mid + 1, r); /op/g]O}  
else RQJ9MG w  
insertSort(data, mid + 1, r - mid); .hnF]_QQ  
.kzms  
for (i = l; i <= mid; i++) { 9w$7VW;  
temp = data; Ty iU1,oO  
} [EcV\.  
for (j = 1; j <= r - mid; j++) { JbVi1?c  
temp[r - j + 1] = data[j + mid]; 6A@Lj*:2m  
} VG#$fRrZ  
int a = temp[l]; :EaiM J_=  
int b = temp[r]; :=B[y D!  
for (i = l, j = r, k = l; k <= r; k++) { nR#a)et  
if (a < b) { a#6,#Q"  
data[k] = temp[i++]; A9.;>8!u  
a = temp; 92NC]_jw  
} else { 8s&2gn1  
data[k] = temp[j--]; _.hIv8V  
b = temp[j]; i&B?4J)  
} zVn*!c  
} GHqBnE{B  
} vzQyE0T/  
@Yb Z 8Uc  
/** /TG| B Eb  
* @param data  2w;G4  
* @param l +;5Wp$ M\  
* @param i PH{ c,  
*/ 4jPwL|#  
private void insertSort(int[] data, int start, int len) { {K6Kx36  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z4 nou>  
} >cSi/a,L  
} $R3.yX=[\  
} oO}>i0ax*  
} X$ejy/+.  
s:G [Em1  
堆排序: gx&\Kw6HM  
CJtr0M<U+  
package org.rut.util.algorithm.support; \_)02ZT:  
]r]+yM|  
import org.rut.util.algorithm.SortUtil; -y9Pn>~V  
Ed8U;U b  
/** <m:4g ,6  
* @author treeroot >J?jr&i  
* @since 2006-2-2 {[rO2<MkA#  
* @version 1.0 939]8BERt  
*/ fjF!>Dy  
public class HeapSort implements SortUtil.Sort{ G<Th<JF)Q  
'XG:1Bpm  
/* (non-Javadoc) kz3?j<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s-Q7uohK  
*/ cG<Q`(5~  
public void sort(int[] data) { H{&a)!Ms  
MaxHeap h=new MaxHeap(); m.|qVN  
h.init(data); #.RG1-L  
for(int i=0;i h.remove(); v_[)FN"]Y.  
System.arraycopy(h.queue,1,data,0,data.length); F?!};~$=Z  
} fB@K'JQG  
nA|gQibA  
private static class MaxHeap{ kwDjK"  
-DbH6u3  
void init(int[] data){ GC,vQ\  
this.queue=new int[data.length+1]; ?T$*5d  
for(int i=0;i queue[++size]=data; :H~UyrN  
fixUp(size); 5n-9#J$  
} R*zBnHAb!  
} X=-gAutfE=  
ze-TBh/  
private int size=0; JsHxQ0Tw  
%D`^  
private int[] queue; ktkn2Twa/  
\fkS_r,i  
public int get() { m&(%&}g  
return queue[1]; f/$-Nl.  
} 3W%f#d$`  
00$ @0  
public void remove() { vCYSm  0  
SortUtil.swap(queue,1,size--); \pT^Zhp)  
fixDown(1); $ l0eI  
} 58a)&s[+  
file://fixdown `lH1IA/3  
private void fixDown(int k) { 5e~ j  
int j; dlU JYI  
while ((j = k << 1) <= size) { .rD#1)O  
if (j < size %26amp;%26amp; queue[j] j++; {PP ^Rb)  
if (queue[k]>queue[j]) file://不用交换 FkB6*dm-  
break; G "c&C  
SortUtil.swap(queue,j,k); )Gu0i7iN  
k = j; P':]A{<Z  
} ^59YfC<f  
} [esX{6,i  
private void fixUp(int k) { uyS^W'fF  
while (k > 1) { {7j6$.7J$&  
int j = k >> 1; )VV4HoH]8  
if (queue[j]>queue[k]) :G6 xJlE|  
break; ~_/<PIm  
SortUtil.swap(queue,j,k); \Nh^Ig   
k = j; v '"1/% L  
} rH [+/&w5  
} E.WNykF-  
9Y!0>&o  
} P22y5z~  
DKaG?Y,*p  
} )U"D4j*p  
[<@A8Q5,y  
SortUtil: 8\W3Fv Q  
Lv`8jSt\  
package org.rut.util.algorithm; ImT+8p a  
rTm>8et  
import org.rut.util.algorithm.support.BubbleSort; 0k. #  
import org.rut.util.algorithm.support.HeapSort; 7>c 0V&  
import org.rut.util.algorithm.support.ImprovedMergeSort; tq4"Q BIKh  
import org.rut.util.algorithm.support.ImprovedQuickSort; w<8O=  
import org.rut.util.algorithm.support.InsertSort; -E,{r[Sp  
import org.rut.util.algorithm.support.MergeSort; 7><* 9iOW  
import org.rut.util.algorithm.support.QuickSort; R?={{+O  
import org.rut.util.algorithm.support.SelectionSort; 5KA FUR0  
import org.rut.util.algorithm.support.ShellSort; hr$VVbOho  
;c \zgs~"T  
/**  ?fqkM  
* @author treeroot *1 J#Mdd  
* @since 2006-2-2 inq4CGY  
* @version 1.0 nEa'e5 lg  
*/ +0JH"L5!  
public class SortUtil { Pv/%s) &y&  
public final static int INSERT = 1; )0 42?emn  
public final static int BUBBLE = 2; pRDON)$  
public final static int SELECTION = 3; leX7(Y;!a7  
public final static int SHELL = 4; GakmROZ@9  
public final static int QUICK = 5; qQ?,|4)y  
public final static int IMPROVED_QUICK = 6; *BP\6"X  
public final static int MERGE = 7; o to wvm  
public final static int IMPROVED_MERGE = 8; z wniS6R1  
public final static int HEAP = 9; k8t Na@H  
0W<nE[U  
public static void sort(int[] data) { hD9' `SQ  
sort(data, IMPROVED_QUICK); sWpRX2{5,  
} nw]e_sm  
private static String[] name={ \CEnOq  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Pvb+   
}; 2)j#O  
^r?sgJ  
private static Sort[] impl=new Sort[]{ ]Pg?(lr6)  
new InsertSort(), ,~=z_G`R  
new BubbleSort(), 9< 0$mE^:  
new SelectionSort(), l#5k8+s  
new ShellSort(), VES4x%r=  
new QuickSort(), :b3l J-dB  
new ImprovedQuickSort(), uq#h\p|  
new MergeSort(), 07G*M ]  
new ImprovedMergeSort(), >sl1 cC  
new HeapSort() =+sIX3  
}; 5k7(!  
+%cr?g  
public static String toString(int algorithm){ 8d*<Aki?;  
return name[algorithm-1]; KWuj_.;  
} xa%ktn  
88+\mX;A#  
public static void sort(int[] data, int algorithm) { 4- ?`#  
impl[algorithm-1].sort(data); ;^H+ |&$>  
} a?Qcf;o  
{0Ol/N;|D  
public static interface Sort { ~%!U,)-  
public void sort(int[] data);  kAe-d  
} I!i#=  
`sp'Cl!  
public static void swap(int[] data, int i, int j) { #t9=qR~"  
int temp = data; rc{[\1 -N  
data = data[j]; l4BO@   
data[j] = temp; 5fDtSsW  
} (k2J{6]  
} .WPR}v,.Z  
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