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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。 j[`j9mM8  
插入排序: hQYL`Dni  
hs^zTZ_  
package org.rut.util.algorithm.support; CyS$|E  
L2\#w<d  
import org.rut.util.algorithm.SortUtil; 0 ?s|i :  
/** PVe xa|aaX  
* @author treeroot zk$FkbX  
* @since 2006-2-2 Zq+v6fk_Mn  
* @version 1.0 dP3CG8w5  
*/ ZP@ $Q%up  
public class InsertSort implements SortUtil.Sort{ Ag9vU7  
0)Uce=t`  
/* (non-Javadoc) f(/lLgI(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ] eotc2?u  
*/ SIBtmm1W  
public void sort(int[] data) { l3Xfc2~ 2  
int temp; ]~9t Y n  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); '))0Lh l  
} Bmr>n6|  
} a =J^  
} |:nn>E}ZA/  
;&9)I8Us  
} Jl( &!?j  
cS5Pl  
冒泡排序: m8A#~i .  
|,S+@"0#  
package org.rut.util.algorithm.support; Lt u'W22  
Bal$+S  
import org.rut.util.algorithm.SortUtil; 95ZyP!  
2^r <{0@n  
/** }JF13beU  
* @author treeroot %'b M){  
* @since 2006-2-2 {#ZlM  
* @version 1.0 } df W%{  
*/ <^VJy5>  
public class BubbleSort implements SortUtil.Sort{ f86XkECZ;`  
^X=ar TE  
/* (non-Javadoc) ^H~h\,;zQ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PRx8I .  
*/ `.E[}W  
public void sort(int[] data) { Njxv4cc  
int temp; WA5&# kg\  
for(int i=0;i for(int j=data.length-1;j>i;j--){ =O&%c%~q  
if(data[j] SortUtil.swap(data,j,j-1); x3hB5p$q  
} W<bGDh  
} vx1c,8  
} 5&QJ7B,!  
} |t^E~HLm,  
'9laa=H%8  
} SON-Z"v  
(jnQ -  
选择排序: 5y d MMb  
8NxM4$nQX  
package org.rut.util.algorithm.support; :y+2*lV  
34`'M+3  
import org.rut.util.algorithm.SortUtil; P2NQHX  
6g2a[6G5  
/** \9cbI3rGz  
* @author treeroot  w^?>e;/\  
* @since 2006-2-2 Vp#JS3Y  
* @version 1.0 8hu<E4]L  
*/ |N4.u _hM  
public class SelectionSort implements SortUtil.Sort { &TnS4O  
xR-%L  
/* P9GN}GN%v  
* (non-Javadoc) 4-? C>  
* aI%g2 q0f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NokU) O;x  
*/ cm&nd'A't  
public void sort(int[] data) { SOs:]U-T3  
int temp; cbNTj$'b2u  
for (int i = 0; i < data.length; i++) { wu7Lk3  
int lowIndex = i; ]}Mj)J"m  
for (int j = data.length - 1; j > i; j--) { p09HL%~R  
if (data[j] < data[lowIndex]) { bENdMH";  
lowIndex = j; >NO[UX%yP  
} ~,d,#)VE2q  
} &c`nR<  
SortUtil.swap(data,i,lowIndex); ~xbe~$$Q@  
} )#EGTRdo  
} qaqBOHI6G  
+ @A  
} ."TxX.&HE  
l\E%+?K+^  
Shell排序: [8P:?nDDL  
dWM'fg  
package org.rut.util.algorithm.support; h(<,fg1  
Um }  
import org.rut.util.algorithm.SortUtil; 9?A)n4b;  
%G3h?3  
/** ^7>3a/  
* @author treeroot q YC;cKv  
* @since 2006-2-2 r  [9x  
* @version 1.0 6 +Sxr  
*/ GSY(  
public class ShellSort implements SortUtil.Sort{ s6ZuM/Q  
A ;G;^s  
/* (non-Javadoc) @*F"Q1 wI  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aC^\(wp[  
*/ }elc `jj  
public void sort(int[] data) { Bt[/0>i  
for(int i=data.length/2;i>2;i/=2){ v:EB*3n5  
for(int j=0;j insertSort(data,j,i); w4_ U0 n3  
} ^aIPN5CK  
} !ds"9w  
insertSort(data,0,1); x* DarSk  
} D_?K"E=fw  
)r';lGh2#  
/** V@\gS"Tu  
* @param data Okgv!Nt8)A  
* @param j &*sP/z  
* @param i [N FFB96  
*/ =31"fS@  
private void insertSort(int[] data, int start, int inc) { ylUb9KusOx  
int temp; 2:*w~|6>}5  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); B*qi_{Gp  
} iy6On,UL  
} < 3(LWxw  
} 4)E_0.C  
1ofKt=|=  
} "B8Q:  
M])ZK  
快速排序: ;1#H62Z*  
~"dA~[r L  
package org.rut.util.algorithm.support; /TE_W@?^  
k2E0/ @f{k  
import org.rut.util.algorithm.SortUtil; "vA}FV%tRq  
(As#^q\>B  
/** 2`.cK 3  
* @author treeroot c~6>1w7SZ4  
* @since 2006-2-2 01[NX? qEa  
* @version 1.0 ,"2s`YC  
*/ U!T~!C^  
public class QuickSort implements SortUtil.Sort{ KjV:|  
.ELGWF`>  
/* (non-Javadoc) dL:-Y.?0M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rMXN[,|v  
*/ $GYm6x\4  
public void sort(int[] data) { ~a%Z;Aj  
quickSort(data,0,data.length-1); $J4 *U  
} jN e`;o  
private void quickSort(int[] data,int i,int j){ ()tp>  
int pivotIndex=(i+j)/2; DQMHOd7g  
file://swap {zQS$VhXr  
SortUtil.swap(data,pivotIndex,j); -r#X~2tPzD  
u83J@nDQ  
int k=partition(data,i-1,j,data[j]); ]'5;|xc9$/  
SortUtil.swap(data,k,j); ~i@Y|38C  
if((k-i)>1) quickSort(data,i,k-1); X_qf"|i  
if((j-k)>1) quickSort(data,k+1,j); A3vUPWdDk  
;g6M%;1-  
} 0_k '.5l%  
/** 6)z?f4,  
* @param data s?zAP O8Sz  
* @param i D*Ik7Pe  
* @param j *o-.6OxZ$  
* @return dp++%:j  
*/ N+zKr/  
private int partition(int[] data, int l, int r,int pivot) { UUF ;p2{f  
do{ RbCPmiZcH  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); z?>D_NLX6  
SortUtil.swap(data,l,r); J\J?yo 6  
} vgD {qg@  
while(l SortUtil.swap(data,l,r); Ad:TYpLD  
return l; hOFOO_byzO  
} O_cbP59Y.  
e2z h&j  
} uMut=ja(U  
XGJj3-eW {  
改进后的快速排序: I+Jm>XN  
Qd=^S^}(  
package org.rut.util.algorithm.support; *4U^0e  
z?[r  
import org.rut.util.algorithm.SortUtil; -6Oz^  
?|WoIV.  
/** 9Rn? :B~W:  
* @author treeroot  DVah  
* @since 2006-2-2 iv?gZg   
* @version 1.0 H~GQ;PhRx  
*/ a\IP12F?  
public class ImprovedQuickSort implements SortUtil.Sort { TlI<1/fP}  
pAb.c  
private static int MAX_STACK_SIZE=4096; @+'-ADX  
private static int THRESHOLD=10; *?y+e  
/* (non-Javadoc) t| 9 GS|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fbWFLS m;  
*/ c~{9a_G  
public void sort(int[] data) { y_*PQZ$c<  
int[] stack=new int[MAX_STACK_SIZE]; TpmwD{c[\  
bV edFm  
int top=-1; cE`6uq7 p  
int pivot; 4J;-Dq  
int pivotIndex,l,r; "jTKSgv+q5  
6'kS_Zu{<  
stack[++top]=0; $e\h}A6  
stack[++top]=data.length-1; S-7'it!1  
uC8L\UXk  
while(top>0){ l IUuA  
int j=stack[top--]; qOSg!aft{Q  
int i=stack[top--]; j. *VJazb;  
%honO@$  
pivotIndex=(i+j)/2; Mva3+T  
pivot=data[pivotIndex]; :C}2=  
HDda@Jy  
SortUtil.swap(data,pivotIndex,j); MZTx:EN!  
u)ev{)$TM  
file://partition VtzI9CD  
l=i-1; ({-GOw46  
r=j; Sr&515  
do{ 'mH) d  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); UOGuqV-  
SortUtil.swap(data,l,r); 7]x3!AlV  
} 3' ~gvi I  
while(l SortUtil.swap(data,l,r); za:a)U^n  
SortUtil.swap(data,l,j); aM@z^<Ub  
\k]x;S<a  
if((l-i)>THRESHOLD){ y kW [B  
stack[++top]=i; 2+cNo9f  
stack[++top]=l-1; U9&k;`  
} j,t#B"hOnp  
if((j-l)>THRESHOLD){ UWZa|I~:J  
stack[++top]=l+1; RrhT'':[  
stack[++top]=j; \":?xh_H  
} WpS1a440  
zVi15P$  
} 8>7RxSF  
file://new InsertSort().sort(data); iweD @b  
insertSort(data); 6 4D]Ypx  
} B aO1/zk  
/** Zes+/.sA}]  
* @param data kWlAY%   
*/ Ku/~ N#  
private void insertSort(int[] data) { K. %U  
int temp; jSOS}!=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); fQ'.8'>T  
} `:wvh(  
} X53mzs  
} hKNY+S})g  
6AvHavA^Y  
} /({;0I*!i  
B/J>9||g  
归并排序: `k; KBW  
rVtw-[p  
package org.rut.util.algorithm.support;  \dl ph  
!Y<oN~<%)  
import org.rut.util.algorithm.SortUtil; Uw/l>\  
vBvNu<v7te  
/** O lfn  
* @author treeroot g7CXlT0Q6  
* @since 2006-2-2 W%e_~$H0  
* @version 1.0 ?\/qeGW6G  
*/ G~wFnl%  
public class MergeSort implements SortUtil.Sort{ 3Wcy)y>2Ap  
8ZcU[8r  
/* (non-Javadoc) J9%@VZut  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <&pKc6+{  
*/ GIftrYr  
public void sort(int[] data) { *U=]@I}J  
int[] temp=new int[data.length]; {ub/3Uh  
mergeSort(data,temp,0,data.length-1); :%JC^dV(  
} -fgC" 2H  
' )-M\'S$E  
private void mergeSort(int[] data,int[] temp,int l,int r){ pi5GxDA]  
int mid=(l+r)/2; ~AG$5!  
if(l==r) return ; ]h!`IX  
mergeSort(data,temp,l,mid); NQ|xM"MqD  
mergeSort(data,temp,mid+1,r); z[#Fog  
for(int i=l;i<=r;i++){ y^Vw`-e  
temp=data; 1ndJ+H0H  
} w %c  
int i1=l; maSgRf[g  
int i2=mid+1; J^m<*  
for(int cur=l;cur<=r;cur++){ sT1&e5`W  
if(i1==mid+1) ~vgA7E/XV  
data[cur]=temp[i2++]; aF8k/$u  
else if(i2>r) I,ci >/+b  
data[cur]=temp[i1++]; _2hXa!yO  
else if(temp[i1] data[cur]=temp[i1++]; k$Rnj`*^  
else wU`!B<,j  
data[cur]=temp[i2++]; i2Jq|9,g  
} [m'CR 4(|  
} 2.Yi( r  
HFo-4"  
} +VU4s$w6  
c 5`US  
改进后的归并排序: 68R1AqU_  
~V)?>)T  
package org.rut.util.algorithm.support; ~S; Z\  
x`Fjf/1T*m  
import org.rut.util.algorithm.SortUtil; 9l+{OA  
8cm@a*2%  
/** jU=<r  
* @author treeroot WxGSv#u  
* @since 2006-2-2 8 Op.eYe  
* @version 1.0 59rY[&|  
*/ o%y;(|4t >  
public class ImprovedMergeSort implements SortUtil.Sort { 4B-yTyO  
r;iV$Rq !  
private static final int THRESHOLD = 10; *(GZ^QH.  
8v y G*UK  
/* {UH9i'y:t  
* (non-Javadoc) U!e6FHj7  
* 2L\3S ukj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .tF|YP==  
*/ {<w +3Va  
public void sort(int[] data) { BH@b1}  
int[] temp=new int[data.length]; UP2.]B!d  
mergeSort(data,temp,0,data.length-1); */OI *{Q  
} :WXf.+IA  
x:5dC I  
private void mergeSort(int[] data, int[] temp, int l, int r) {  ?RD *1  
int i, j, k; . p^xS6e{  
int mid = (l + r) / 2; A8?[6^%O|  
if (l == r) ^uaFg`S  
return; 0,FC YTtj$  
if ((mid - l) >= THRESHOLD) Ie'P#e'  
mergeSort(data, temp, l, mid); X;fy\HaU  
else 45}v^|Je\  
insertSort(data, l, mid - l + 1);  s&*yk p  
if ((r - mid) > THRESHOLD) BIWD/ |LQ  
mergeSort(data, temp, mid + 1, r); qeaA&(|5  
else @?&Wm3x9  
insertSort(data, mid + 1, r - mid); EychR/s  
rhY_|bi4P  
for (i = l; i <= mid; i++) { K5ZnS`c;  
temp = data; ;R[&pDx  
} zp=!8Av  
for (j = 1; j <= r - mid; j++) { OM9 6`  
temp[r - j + 1] = data[j + mid]; 'M'w,sID  
} K5 vNhA  
int a = temp[l]; -S; &Q'Mt  
int b = temp[r]; <fM>Yi5  
for (i = l, j = r, k = l; k <= r; k++) { ValS8V*N1  
if (a < b) {  pbB2wt  
data[k] = temp[i++]; \~"#ld(x7  
a = temp; 6w#nkF  
} else { DBbc|I/[l  
data[k] = temp[j--]; LXhaD[1Rb  
b = temp[j]; Qp:6= o0:  
} d$1 #<-yP  
} 4nX(:K}>  
} %"7WXOv&z  
n@B{vyy  
/** qw:9zYG}qW  
* @param data T_L6 t66I  
* @param l !p% @Deu  
* @param i F +j O*F2h  
*/ fuSq ={]  
private void insertSort(int[] data, int start, int len) { /GsrGX8  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;9rTE|n  
} l L2-.!]R  
} k\(4sY M  
} =g0*MZ;"  
} Oje|bxQ  
H2\1gNL  
堆排序: sX'U|)/pD  
7,_-XV2  
package org.rut.util.algorithm.support; \j:gr>4  
E\e]K !  
import org.rut.util.algorithm.SortUtil; ATO 5  
nGZ \<-  
/** Ff/Ig]Lb  
* @author treeroot r%!FmS<  
* @since 2006-2-2 mq`5w)S)\o  
* @version 1.0 T0L+z/N_m.  
*/ A#:8X1w  
public class HeapSort implements SortUtil.Sort{ 5fq.*1f  
cqg=8$RB  
/* (non-Javadoc) `Yogq)G}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 ?2g&B\  
*/ n2 na9dX)w  
public void sort(int[] data) { [a D:A  
MaxHeap h=new MaxHeap(); xT+ ;w[s  
h.init(data); Z}f^qc+  
for(int i=0;i h.remove(); XIN5a~[z*  
System.arraycopy(h.queue,1,data,0,data.length); LD@7(?mlU  
} 7ti<  
;l`X!3  
private static class MaxHeap{ lQr6;D}+  
-RCv7U`  
void init(int[] data){ !d|8'^gc  
this.queue=new int[data.length+1]; x[}06k'  
for(int i=0;i queue[++size]=data; E8;TLk4\  
fixUp(size); *K!7R2Rat  
} M 5rwoyn  
} (+$ol'i  
H:E5xz3VQ  
private int size=0; ris;Iu^v0  
xc *!W*04  
private int[] queue; u S(@?m$  
[#zE. TW  
public int get() { JB'qiuhab  
return queue[1]; <"NyC?b+G  
} _s@bz|yqw  
(l;C%O7*  
public void remove() { YZ{jP?x  
SortUtil.swap(queue,1,size--); :>ZzP:QD  
fixDown(1); zK /f$}  
} ^OjvL6 A/p  
file://fixdown %d-`71|lG^  
private void fixDown(int k) { :D^Y?  
int j; z-)*Q  
while ((j = k << 1) <= size) { 7n<#y;wo  
if (j < size %26amp;%26amp; queue[j] j++; 8+L7E-  
if (queue[k]>queue[j]) file://不用交换 J2Y 3er  
break;  xLLC)~  
SortUtil.swap(queue,j,k); ,?#*eJD  
k = j; FB.!`%{  
} S^)WYF5  
} yj]ML:n  
private void fixUp(int k) { |#:=\gugh  
while (k > 1) { w1.MhA  
int j = k >> 1; afV P-m4L  
if (queue[j]>queue[k]) &Ky3Jb<:Gt  
break; ax;{MfsK  
SortUtil.swap(queue,j,k); T!&jFy*W  
k = j; ->Q`'@'|P  
} "?`JA7~g  
} B[Ix?V4yy  
kYmo7  
} vsw7|  
lbG}noqb  
} j& <tdORT  
d{iL?>'?^  
SortUtil: +H?<}N*T  
QQSH +  
package org.rut.util.algorithm; &s2#1  
0K`ZX&K?W  
import org.rut.util.algorithm.support.BubbleSort; B>ge, }{  
import org.rut.util.algorithm.support.HeapSort; '[n)N@h  
import org.rut.util.algorithm.support.ImprovedMergeSort; }^IwQm*i  
import org.rut.util.algorithm.support.ImprovedQuickSort; f>?^uSpWH  
import org.rut.util.algorithm.support.InsertSort; IMw "eV  
import org.rut.util.algorithm.support.MergeSort; dp33z"<3  
import org.rut.util.algorithm.support.QuickSort; *EX$v4BX  
import org.rut.util.algorithm.support.SelectionSort; 1Q0%7zRirI  
import org.rut.util.algorithm.support.ShellSort; ;7wwY$PBH  
;!^ +N  
/** ./'; P <)  
* @author treeroot (v|ixa  
* @since 2006-2-2 p"g1V7B  
* @version 1.0 D8q3TyCj%  
*/ Rd .U;>  
public class SortUtil { J.*[gt%O|  
public final static int INSERT = 1; mQmBf|Rl  
public final static int BUBBLE = 2;  W{L  
public final static int SELECTION = 3; ;`;G/1]#9  
public final static int SHELL = 4; Z={D0`  
public final static int QUICK = 5; [..,(  
public final static int IMPROVED_QUICK = 6; xcAF  
public final static int MERGE = 7; V@ LN 1|  
public final static int IMPROVED_MERGE = 8; `WP@ZSC6  
public final static int HEAP = 9; |R[v@c`pn  
J2)-cY5G  
public static void sort(int[] data) { Wk0>1 rlu  
sort(data, IMPROVED_QUICK); x:=0.l#  
} AlA h S<  
private static String[] name={ xI-=t ib  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7W6eiUI'  
}; `4$4bXrP'  
k, $I59  
private static Sort[] impl=new Sort[]{ 4!NfQk>X  
new InsertSort(), Y] D7i?3N  
new BubbleSort(), 3D]2$a_d  
new SelectionSort(), Mp]yKl  
new ShellSort(), 4jDs0Hn"  
new QuickSort(), j` [#Ij  
new ImprovedQuickSort(), /UEV8 1  
new MergeSort(), BUcaj.S  
new ImprovedMergeSort(), h9tB''ePE  
new HeapSort() oV%( 37W9=  
}; =)mXCA^  
# Nu%]  
public static String toString(int algorithm){ :;" aUHU'  
return name[algorithm-1]; Ib_n'$5#z  
}  #a|6Q 8  
~E^yM=:h  
public static void sort(int[] data, int algorithm) { ckH$E%j   
impl[algorithm-1].sort(data); KK&<Vw|O\  
} ))%@@l[  
4iYgs-,  
public static interface Sort { |@T5$Xg]5  
public void sort(int[] data); ]+^;vc 1r  
} s_S<gR  
NqQM! B]  
public static void swap(int[] data, int i, int j) { ^8o_Iz)r,  
int temp = data; 2N8rM}?90  
data = data[j]; g:G%Ei~sF  
data[j] = temp; "N?%mCPI  
} #i`A4D  
} XgwMppacw  
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