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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。 *r]#jY4qx  
插入排序: hn u/  
w2`j&]D6  
package org.rut.util.algorithm.support; +UP?M4g  
aMjCqu05  
import org.rut.util.algorithm.SortUtil; jl4rEzVu  
/** bjq2XP?LL  
* @author treeroot Mxe  
* @since 2006-2-2 t\C[mw  
* @version 1.0 YY<e]CriU  
*/ yh Ymbu  
public class InsertSort implements SortUtil.Sort{ gG=E2+=uy  
`{I-E5 x  
/* (non-Javadoc) .c.#V:XZ#U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;rH@>VrR  
*/ pF"IDC  
public void sort(int[] data) { O8ZHIs  
int temp; PK* $  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); b%,`;hy{  
} sWnU*Q  
} YEqWTB|w  
} Bhrp"l +|  
:!Tb/1  
} %Gs!oD  
/=qn1  
冒泡排序: >j$CM:w  
\D #NO  
package org.rut.util.algorithm.support; bx<7@  
/P|jHK|{  
import org.rut.util.algorithm.SortUtil; FeFH_  
#VEHyz6P  
/** I2'UC) 0  
* @author treeroot _sCpyu  
* @since 2006-2-2 %fz!'C_4  
* @version 1.0 SSF4P&  
*/ Wz7jB6AWA  
public class BubbleSort implements SortUtil.Sort{ D?Q{&6p  
z7J2O  
/* (non-Javadoc) u-. _;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #`4ma:Pj  
*/ X;0DQnAI8j  
public void sort(int[] data) { I(Yyg,1Z  
int temp; bmO[9 )G  
for(int i=0;i for(int j=data.length-1;j>i;j--){ RtR]9^:~  
if(data[j] SortUtil.swap(data,j,j-1); )y:~T\g  
} VscEdtkd  
} uIvE~<  
} U{o0Posg  
} Hd)4_ uBt  
HIi 5kv]}|  
} O=St}B\!m  
3l 0>  
选择排序: $9\!CPZ2  
;HJ|)PN5L  
package org.rut.util.algorithm.support; g+k0Fw]!  
3B|o   
import org.rut.util.algorithm.SortUtil; T!)v9L  
`:A`%Fg8<  
/** eJ#q! <   
* @author treeroot ``}EbOMG  
* @since 2006-2-2 8:,l+[\  
* @version 1.0 LEkO#F(  
*/ :WT O*M  
public class SelectionSort implements SortUtil.Sort { \qqt/  
Hay`lA2@  
/* ?t+Kp 9@aZ  
* (non-Javadoc) ,m:YZ;J(Xd  
* }CA oB::&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uok?FEN  
*/ eUA6X ,I  
public void sort(int[] data) { ]`&ws  
int temp; Nd*zSsVlq  
for (int i = 0; i < data.length; i++) { M:qeqn+  
int lowIndex = i; ,xrXby|R"  
for (int j = data.length - 1; j > i; j--) { P-VK=Y1q  
if (data[j] < data[lowIndex]) { 969*mcq'  
lowIndex = j; _*+ 7*vAL  
} PK5xnT:  
} Qe=!'u.nL  
SortUtil.swap(data,i,lowIndex); `|;R}"R;  
} [= -?n6  
} ~fE@]~f>  
_d&FB~=  
} 5TVDt  
C-$S]6  
Shell排序: 1 {dhGX  
n=n!Hn  
package org.rut.util.algorithm.support; EOjo>w>  
k9.2*+vvg  
import org.rut.util.algorithm.SortUtil; .Kr?vD^nG  
|b52JF ",  
/** `Xnu("w)  
* @author treeroot Be+vC=\K  
* @since 2006-2-2 9Bl_t}0  
* @version 1.0 m#mM2Guxe  
*/ Q9Wa@gi|  
public class ShellSort implements SortUtil.Sort{  tQB+_q z  
Ym5q#f)|  
/* (non-Javadoc) { D1.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T2 0dZ8{y  
*/ ]C-hl}iq  
public void sort(int[] data) { ]%3o"|  
for(int i=data.length/2;i>2;i/=2){ g6k@E,cI_  
for(int j=0;j insertSort(data,j,i); YsXP$y]g-  
} 2;NIUMAMM  
} v"Fa_+TVx  
insertSort(data,0,1); GmB7@-[QA%  
} b,8W |  
Pm6/sO  
/** lN)U8  
* @param data {mMrD 5  
* @param j T&I*8 R~  
* @param i !j6]k^ra  
*/ NWSBqL5v   
private void insertSort(int[] data, int start, int inc) { q3B#rje>h  
int temp; >z1RCQWju  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); O2?ye4uq  
} ._"U{ f2V  
} ](4V 3w.  
} HiEXw}Hkz  
q-3%.<LL  
} LZV  
xj iMM>|n  
快速排序: [>Kkj;*  
W~ XJ']e  
package org.rut.util.algorithm.support; R}a,.C  
Sve~-aG  
import org.rut.util.algorithm.SortUtil; ;=Jj{FoG%  
Slcf=  
/** DHJh.Y@H  
* @author treeroot iTi<X|X  
* @since 2006-2-2 >sdj6^[+  
* @version 1.0 {=j!2v#8~  
*/ a0Cf.[L  
public class QuickSort implements SortUtil.Sort{ .G#S*L  
5@bLD P  
/* (non-Javadoc) KD*,u{v;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !9DqW&8  
*/ ZkkXITQkPM  
public void sort(int[] data) { @kn0f`  
quickSort(data,0,data.length-1); ^)conSm  
} 5V4Ze;K  
private void quickSort(int[] data,int i,int j){ z,[4 BM  
int pivotIndex=(i+j)/2; 900#K   
file://swap 0~Ot  
SortUtil.swap(data,pivotIndex,j); [s"3g\L';  
.{LFc|Z[  
int k=partition(data,i-1,j,data[j]); yv^j~  
SortUtil.swap(data,k,j); @dV'v{:,  
if((k-i)>1) quickSort(data,i,k-1); G eN('0  
if((j-k)>1) quickSort(data,k+1,j); qi_[@da f?  
{BKu'A  
} 33DP0OBL^  
/** /Ou`$2H87  
* @param data *r$Yv&c,  
* @param i ]fI v{[A_  
* @param j MbC7`Sp&i  
* @return #.UooFk+Y  
*/ (EGsw o  
private int partition(int[] data, int l, int r,int pivot) { mnu4XE#|  
do{ So\(]S  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Q5b?- P  
SortUtil.swap(data,l,r); $&Ng*oX  
} sH(4.36+  
while(l SortUtil.swap(data,l,r); r.0IC*Y  
return l; Q\ TawRK8  
} /<vbv  
3:X3n\z  
} m+||t  
7R[4XQ%  
改进后的快速排序: nellN}jYsM  
ByoSwQ  
package org.rut.util.algorithm.support; }(z[ rZ  
6 uW?xB9  
import org.rut.util.algorithm.SortUtil; ,J"6(nk  
EFu2&P  
/** '{p/F $  
* @author treeroot j1%o+#df  
* @since 2006-2-2 d76k1-m\o  
* @version 1.0 l9"0Wu@_x  
*/ pw" !iG}  
public class ImprovedQuickSort implements SortUtil.Sort { wd2GKq!  
mufi>}  
private static int MAX_STACK_SIZE=4096; /Pv d[oF  
private static int THRESHOLD=10; n]?Yv E  
/* (non-Javadoc) Vrz x;V%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eTem RNz  
*/ RiqYC3Ka  
public void sort(int[] data) { 9&fS<Hk  
int[] stack=new int[MAX_STACK_SIZE]; A(2_hl-  
'8K5=|!J  
int top=-1; i,1=5@rw5  
int pivot; ~+}w>jIm{|  
int pivotIndex,l,r; S#6{4x4  
Fxdu)F,~u  
stack[++top]=0; <|[G=GA\S!  
stack[++top]=data.length-1; 5drc8_fZ  
@H2c77%  
while(top>0){ DW&%"$2  
int j=stack[top--]; CRf!tsj@  
int i=stack[top--]; F]DRT6)  
W~(@*H  
pivotIndex=(i+j)/2; 7Vd"k;:X  
pivot=data[pivotIndex]; Rd@34"O  
kIhP 73M  
SortUtil.swap(data,pivotIndex,j); A5cx!h  
NFw7g&1;Kp  
file://partition m/RX~,T*v&  
l=i-1; a~E@scD  
r=j; Qn'Do4Le  
do{ NC'+-P'y  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 'NHtCs=F   
SortUtil.swap(data,l,r); nXPl\|pXt  
} k=1([x  
while(l SortUtil.swap(data,l,r);  al/Mgo  
SortUtil.swap(data,l,j); 9o5W\.A7[D  
%Z9&zmO  
if((l-i)>THRESHOLD){ .'N:]G@!  
stack[++top]=i; ([SrIG>X  
stack[++top]=l-1; \^a(B{   
} t&}Z~Zp  
if((j-l)>THRESHOLD){ gsFyZ  
stack[++top]=l+1; Tlc3l}B*Z  
stack[++top]=j; CZ* #FY  
} Agt6G\ n  
&J(+XJM%  
} 6/_] |4t  
file://new InsertSort().sort(data); gv)F`uRWA  
insertSort(data); 4Gz5Ju  
} ?}|l )  
/** };;\&#  
* @param data l3kYfq{";"  
*/ +Tz Z   
private void insertSort(int[] data) { hbl%<ItI49  
int temp; (1pI#H"f9  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); /Iht,@%E  
} \1|]?ZQ\K  
} 0qP&hybL[(  
} OiBDI3,|+  
o zg%-  
} ZslH2#   
k\->uSU9  
归并排序: V6l~Aj}/  
:'1UX <&B  
package org.rut.util.algorithm.support; lO=+V 6  
-+MGs]),  
import org.rut.util.algorithm.SortUtil; v`&  
qZw4"&,j$  
/** pkTg.70wU  
* @author treeroot GjTj..G/  
* @since 2006-2-2 Pf,S`U w;  
* @version 1.0 VG FWF3s  
*/ 8/q6vk><  
public class MergeSort implements SortUtil.Sort{ j7r!N^  
$p_FrN{  
/* (non-Javadoc) [4qCW{x._  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xc)V;1  
*/ %f??O|O3  
public void sort(int[] data) { h M{&if  
int[] temp=new int[data.length]; ~{69&T}9  
mergeSort(data,temp,0,data.length-1); ttQX3rmF01  
} 5W hR |  
9gjI;*(z1  
private void mergeSort(int[] data,int[] temp,int l,int r){ _<Hx1l~  
int mid=(l+r)/2; R}~p1=D  
if(l==r) return ; 9J>b6   
mergeSort(data,temp,l,mid); (EZ34,k'S  
mergeSort(data,temp,mid+1,r); ?naPti1GX  
for(int i=l;i<=r;i++){ p#-ov-znp  
temp=data; 5vxKkk&i4l  
} !%w#h0(b  
int i1=l; D2hEI2S  
int i2=mid+1; OPm ?kr  
for(int cur=l;cur<=r;cur++){ $xx5+A%,  
if(i1==mid+1) 38Rod]\E  
data[cur]=temp[i2++]; $7Sbz&)y3  
else if(i2>r) si`{>e~`6P  
data[cur]=temp[i1++]; @q=l H *=  
else if(temp[i1] data[cur]=temp[i1++]; WY=RJe2  
else W40GW  
data[cur]=temp[i2++]; {8L)Fw  
} 31BN ?q  
} Y# <38+Gd  
HbQvu@  
} #Bo/1G=  
P<+y%g(({  
改进后的归并排序: m3|KIUP  
%y@iA91K  
package org.rut.util.algorithm.support; @\~qXz{6J  
!A R$JUnX  
import org.rut.util.algorithm.SortUtil; 6Mpbmfr  
r 5$(  
/** B_f0-nKP  
* @author treeroot m>po+7"b  
* @since 2006-2-2 9ICC2%j|  
* @version 1.0 fX.V+.rj  
*/ ]>utLi5dX  
public class ImprovedMergeSort implements SortUtil.Sort { ZqI.n4:9  
x.>E7 +  
private static final int THRESHOLD = 10; >{DHW1kF?  
.3;bUJ1  
/* @G/':N   
* (non-Javadoc) $}[Tj0+:  
* P1P P#>E-2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Salu[)+?  
*/ [\9WqHs  
public void sort(int[] data) { E\M{/.4 4  
int[] temp=new int[data.length]; DNgQ.lV  
mergeSort(data,temp,0,data.length-1); 1[k~*QS  
} 9JF*xXd>Q  
id^U%4J  
private void mergeSort(int[] data, int[] temp, int l, int r) { ] o!#]]   
int i, j, k; YK# QH"}  
int mid = (l + r) / 2; #=WDJ T:  
if (l == r) V/j]UK0$  
return; gto@o\&=  
if ((mid - l) >= THRESHOLD) dEXHd@"H  
mergeSort(data, temp, l, mid); uO$ujbWZ  
else gbc^Lb  
insertSort(data, l, mid - l + 1); ^q"wd?((h  
if ((r - mid) > THRESHOLD) qA- ya6  
mergeSort(data, temp, mid + 1, r); -t9oL3J  
else %iPu51+=  
insertSort(data, mid + 1, r - mid); B3I\=  
?Y"bt^4j  
for (i = l; i <= mid; i++) { d}f| HOFq  
temp = data; ~A8%[.({5  
} `Tzq vnn  
for (j = 1; j <= r - mid; j++) { 5H6GZ:hp  
temp[r - j + 1] = data[j + mid]; l3aG#4jj  
} [7Nn%eZC  
int a = temp[l]; UQ|zSalv,  
int b = temp[r]; F"a^`E&  
for (i = l, j = r, k = l; k <= r; k++) { PVO9KWv**  
if (a < b) { YY I  
data[k] = temp[i++]; $ Z;HE/ 3  
a = temp; <$liWAGX\  
} else { 5iola}6  
data[k] = temp[j--]; < %Qw dEO  
b = temp[j]; FV/xp}nz  
} da@y*TO#i  
} 1{ #Xa=  
} !2x"'o  
|-7<?aw"  
/** GS{:7%=j  
* @param data 6RZ[X[R[}  
* @param l v)JQb-<  
* @param i \h^bOxh  
*/ hMJ \a  
private void insertSort(int[] data, int start, int len) { &QOob)  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FH8?W| G  
} _lQ+J=J$.R  
} gB 3&AQ  
} 98C~%+  
} [Hdk=p  
K. G#[  
堆排序: Y=G *[G#  
}wR)p  
package org.rut.util.algorithm.support; 4qda!%  
4x'^?0H@  
import org.rut.util.algorithm.SortUtil; 1elx~5v1.=  
=nnS X-x  
/** yh_s(>sh  
* @author treeroot I#l9  
* @since 2006-2-2 %9mCgHQ9  
* @version 1.0 Kw'Dzz%kN  
*/ "!)8bTW  
public class HeapSort implements SortUtil.Sort{ ,|I\{J #C  
\Y9=d E}  
/* (non-Javadoc) ^J>28Q\S  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~E^EF{h   
*/ gx[#@ (  
public void sort(int[] data) { M;MD-|U  
MaxHeap h=new MaxHeap(); ?l,i(I  
h.init(data); +bm2vIh$  
for(int i=0;i h.remove(); h Zlajky  
System.arraycopy(h.queue,1,data,0,data.length); 6o;lTOes  
} ]CC= \ <  
;_j\E(^%  
private static class MaxHeap{ .WL507*"Ce  
M _U$I7  
void init(int[] data){ BHj]w*Ov  
this.queue=new int[data.length+1]; F__>`Do l  
for(int i=0;i queue[++size]=data; mS~3QV  
fixUp(size); o\]e}+1[o  
} ,h/0:?R KW  
} cb%w,yXw  
q){]fp.,@  
private int size=0; 81W})q8  
4BEVG&Ks  
private int[] queue; >K\ 79<x|  
cD s#5,  
public int get() { SATZ!  
return queue[1]; =|3 L'cDC  
} n+GCL+Mo  
(%0X\zvu/  
public void remove() { d c&Qi_W  
SortUtil.swap(queue,1,size--); BpP\C!:^  
fixDown(1); !+)$;`  
} `*oLEXYN  
file://fixdown n^Z?u9VR  
private void fixDown(int k) { ;8 McG83  
int j; PLLlo~Bb  
while ((j = k << 1) <= size) { >4EcV1y  
if (j < size %26amp;%26amp; queue[j] j++; SgXXitg9+  
if (queue[k]>queue[j]) file://不用交换 r.ajw&J2  
break; FeV=4tsy  
SortUtil.swap(queue,j,k); cjN4U [  
k = j;  7/7A  
} Wq{'ZN  
} 0[3b,  
private void fixUp(int k) { 1}jE?{V*  
while (k > 1) { BC$In!  
int j = k >> 1; /v!H{Zw=c  
if (queue[j]>queue[k]) &\p :VF.  
break; %oor7 -l  
SortUtil.swap(queue,j,k); g"Ii'JZ?  
k = j; wFqz.HoB  
} mOXI"q]p  
} *znCe(dd  
%Vt@7SwRJ  
} n@mUQ6  
_)Qt,$  
} bfpW ^y  
xBw"RCBz^  
SortUtil: *Mp<4B  
U'lmQrF!  
package org.rut.util.algorithm; df J7Dhn  
Ej34^*m9k  
import org.rut.util.algorithm.support.BubbleSort; a|s=d  
import org.rut.util.algorithm.support.HeapSort; [\.>BK  
import org.rut.util.algorithm.support.ImprovedMergeSort; gdG: &{|x  
import org.rut.util.algorithm.support.ImprovedQuickSort; ))KsQJ"V  
import org.rut.util.algorithm.support.InsertSort; 8dZH&G@;  
import org.rut.util.algorithm.support.MergeSort;  zIAMM  
import org.rut.util.algorithm.support.QuickSort; 15eHddd  
import org.rut.util.algorithm.support.SelectionSort; l%w7N9  
import org.rut.util.algorithm.support.ShellSort; z:fhq:R(  
U_8I$v-~  
/** }bnkTC  
* @author treeroot X r)d;@yi  
* @since 2006-2-2 pH~JPNng  
* @version 1.0 `UJW:qqW  
*/ v'@LuF'e8  
public class SortUtil { ^#t<ILUa  
public final static int INSERT = 1; SQ1&n;M}f  
public final static int BUBBLE = 2; sIy$}_  
public final static int SELECTION = 3; AMm O+E?  
public final static int SHELL = 4; L+kS8D<  
public final static int QUICK = 5; a0LX<}   
public final static int IMPROVED_QUICK = 6; uBMNkN8  
public final static int MERGE = 7; 87>Qw,r  
public final static int IMPROVED_MERGE = 8; Bpp9I;)c  
public final static int HEAP = 9; QV 'y6m\  
AN1bfF:C  
public static void sort(int[] data) { 7r;A wa  
sort(data, IMPROVED_QUICK); '{u#:TTj  
} kg@J.   
private static String[] name={ .z4FuG,R  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *oWzH_  
}; <?7~,#AK  
X'F$K!o*,:  
private static Sort[] impl=new Sort[]{  Uh8ieb  
new InsertSort(), Q$zlxn 7\  
new BubbleSort(), vSL{WT]m  
new SelectionSort(), h/VYH(Tj  
new ShellSort(), CFA>  
new QuickSort(), 1 `AE]  
new ImprovedQuickSort(), DtS{iH=s]  
new MergeSort(), A3$b_i@P  
new ImprovedMergeSort(), #3$|PM7,_  
new HeapSort() 0`thND)?O  
}; _ o(h]G1].  
lyeoSd1AN  
public static String toString(int algorithm){ Y'~&%|9+T  
return name[algorithm-1]; c,fedH;  
} [aC9vEso!  
atAA[~  
public static void sort(int[] data, int algorithm) { `->k7a0<b1  
impl[algorithm-1].sort(data); '[E_7$d  
} xr2:bu  
}<S2W\,G  
public static interface Sort { #lC{R^SL  
public void sort(int[] data); x M[#Ah)  
} \* #4  
.KSGma6]  
public static void swap(int[] data, int i, int j) { ?!66yn  
int temp = data;  M:$nL  
data = data[j]; }.vy|^X  
data[j] = temp; s#fmGe"8  
} 9|m  L  
} X[ (J!"+  
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