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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。 Q Z8QQ`*S  
插入排序: 8|twV35  
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package org.rut.util.algorithm.support; tNs~M4TVVH  
 &K^MN d  
import org.rut.util.algorithm.SortUtil; `P+(&taT  
/**  0JRD  
* @author treeroot 9+YD!y  
* @since 2006-2-2 5H,G-  
* @version 1.0 M ixwK,  
*/ r^$~>!kZ|  
public class InsertSort implements SortUtil.Sort{ dEM ?~?  
o?Sla_D   
/* (non-Javadoc) ;@ WV-bLe  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TPO1 GF  
*/  H'RL62!  
public void sort(int[] data) { [_y@M ]  
int temp; `29TY&p+"  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); '!v c/Hw  
} LU!1s@  
} -'rj&x{Q)U  
} k7_I$ <YDj  
Z#`0txCF  
} SP 2 8  
guN4-gGDr<  
冒泡排序: c)C5KaiPG  
IN^9uL]B  
package org.rut.util.algorithm.support; 4lc)&  
 *2u E  
import org.rut.util.algorithm.SortUtil; 8dT'xuch  
:s8A:mx  
/** Wf02$c0#K  
* @author treeroot 5IMSNGS  
* @since 2006-2-2 {g/wY%u=  
* @version 1.0 dGH_ z8  
*/ Pn TZ/|  
public class BubbleSort implements SortUtil.Sort{ jeN1eM8 WI  
B{, Bno  
/* (non-Javadoc) &J"YsY  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h\ ,5/ )Y  
*/ VlW9UF-W  
public void sort(int[] data) { mp `PE=  
int temp; L9IGK<  
for(int i=0;i for(int j=data.length-1;j>i;j--){ [j6~}zu@  
if(data[j] SortUtil.swap(data,j,j-1); ||TtNH  
} [h}K$q  
} vW.%[]  
} Oo%!>!Lt,  
} 3 %(Y$8U  
AfWl6a?T8:  
} rFag@Z"["  
#!!AbuhzK{  
选择排序: K, (65>86;  
993d/z|DX  
package org.rut.util.algorithm.support; Y4~vC[$ x'  
i|2$8G3  
import org.rut.util.algorithm.SortUtil; \3NS>v[1  
I"!'AI-  
/** m% bE-#  
* @author treeroot jOv"<  
* @since 2006-2-2 ;R1B9-,  
* @version 1.0 xcSR{IZ  
*/ >7-y#SkXdo  
public class SelectionSort implements SortUtil.Sort { SR*Gqx  
!y vJpdsof  
/* +BB0wY  
* (non-Javadoc) eYP=T+  
* ]UUI~sFE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7u%a/<  
*/ IlHY%8F{  
public void sort(int[] data) { kJ8vKcc  
int temp; yuNfhK/#r  
for (int i = 0; i < data.length; i++) { 0M!0JJy#*  
int lowIndex = i; OAok  
for (int j = data.length - 1; j > i; j--) { PKtU:Eg  
if (data[j] < data[lowIndex]) { F/<qE!(  
lowIndex = j; me./o(!?  
} yKDZ+3xK]  
} sMi{"`37  
SortUtil.swap(data,i,lowIndex); $v&C@l \  
} |QYZRz  
} jKt-~:  
&tBA^igXK  
}  R<&FhT]  
$Xt;A&l2?  
Shell排序: A^pW]r=Xtk  
W(k:Pl#  
package org.rut.util.algorithm.support; k/#M<z  
aW`dFitpM  
import org.rut.util.algorithm.SortUtil; a>b8- j=J  
[-VGArD[k,  
/** "|4jP za  
* @author treeroot gB+ G'I  
* @since 2006-2-2 UvD-C?u'  
* @version 1.0 lwsbm D  
*/ aYj%w  
public class ShellSort implements SortUtil.Sort{ XM!M%.0WS  
h*'d;_(,  
/* (non-Javadoc) } J;~P 9Y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]31$KBC  
*/ F50 JJZ  
public void sort(int[] data) { eUs-5 L  
for(int i=data.length/2;i>2;i/=2){ ;f(n.i  
for(int j=0;j insertSort(data,j,i); =jUnM> 23  
} 56ZrCr  
} jM\ %$_/  
insertSort(data,0,1); DyX0 xx^  
} @ KJV1t`  
YKq0f=Ij  
/** L1MrrC  
* @param data lM&UFEl-\  
* @param j ?waebuj>  
* @param i ]^ !}*  
*/ T&4fBMBp,%  
private void insertSort(int[] data, int start, int inc) { j)Lo'&Y~=  
int temp; ;@!;1KDy  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); VKf6|ae  
} BvI 0v:  
} #ko6L3Pi  
} sy.:T]ZH  
cKpQr7]ur  
} AY@k-4  
5Jd` ^U  
快速排序: ;*`_#Rn#  
-R74/GBg  
package org.rut.util.algorithm.support; OequU'j  
)]}$   
import org.rut.util.algorithm.SortUtil; t[q3 {-  
h&$Py  
/** I9,8HtnA  
* @author treeroot HqRCjD  
* @since 2006-2-2 IdmD.k0pJ  
* @version 1.0 }+JLn%H)  
*/ AgCs;k&IG  
public class QuickSort implements SortUtil.Sort{ >.@MR<H#5  
U2=hSzY  
/* (non-Javadoc) ax]9QrA  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K /ZHJkJ7  
*/ } Ab _o#Zy  
public void sort(int[] data) { 6>lW5U^yA\  
quickSort(data,0,data.length-1); 'F<Sf:?.p  
} 5E.vje{U;  
private void quickSort(int[] data,int i,int j){ U 5clQiow  
int pivotIndex=(i+j)/2; iW-t}}Z>B  
file://swap Y)v%  
SortUtil.swap(data,pivotIndex,j); K]MzP|T,  
Uk|9@Auav  
int k=partition(data,i-1,j,data[j]); hvL6zCi  
SortUtil.swap(data,k,j); `{WCrw6)  
if((k-i)>1) quickSort(data,i,k-1); 1V\1]J/  
if((j-k)>1) quickSort(data,k+1,j); YOlH*cZtg  
klo^K9!  
} S}O5l}E  
/** $4: ~* IQ  
* @param data ?9qAe  
* @param i 65t[vi*C  
* @param j b2W;|  
* @return J:[3;Z  
*/ @NBXyC8,Z  
private int partition(int[] data, int l, int r,int pivot) { E~qK&7+  
do{ CCy .  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); wV?[3bEhM  
SortUtil.swap(data,l,r); + f6}p  
} wb@]>MJ}[s  
while(l SortUtil.swap(data,l,r); 6XZN>#  
return l; .GtINhz*  
} w[|y0jtw  
r*>QT:sB  
} }0krSzcn#,  
EtPgzw[#c9  
改进后的快速排序: r"6lLc  
(s.o  
package org.rut.util.algorithm.support; br10ptEx  
mxZ4 HD{  
import org.rut.util.algorithm.SortUtil; J ( =4  
&4[<F"W>47  
/** `c>A >c|  
* @author treeroot Aw5K3@Ltz  
* @since 2006-2-2 ^=3 ^HQ'Zm  
* @version 1.0 hg!x_Eq|  
*/ 2Sv>C `FMU  
public class ImprovedQuickSort implements SortUtil.Sort { 5'),)  
p+!f(H  
private static int MAX_STACK_SIZE=4096; +I?Qg  
private static int THRESHOLD=10; E:%>0FE  
/* (non-Javadoc) t<8z08  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *pY/5? g  
*/ w:n(pLc<  
public void sort(int[] data) { Un~]Q?w  
int[] stack=new int[MAX_STACK_SIZE]; z)r8?9u  
\gjl^# ;  
int top=-1; ,CN#co  
int pivot; zv&ePq\#  
int pivotIndex,l,r; m<~>&mWr  
9$8X> T^   
stack[++top]=0; $]xE$dzJ  
stack[++top]=data.length-1; "Fo  
rE9Ta8j6  
while(top>0){ 3{I=.mUUm  
int j=stack[top--]; wrhBH;3  
int i=stack[top--]; &`-_)~5]  
#vnefIcBf  
pivotIndex=(i+j)/2; ~>lOl/n5  
pivot=data[pivotIndex]; nqBG]y aI  
RT1{+:l  
SortUtil.swap(data,pivotIndex,j); [9'|7fdU  
-Cg`x=G;z  
file://partition j'#)~>b  
l=i-1; 9@JlaY)0  
r=j; "K/[[wX\b  
do{ xq8}6Q  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); X^u4%O['  
SortUtil.swap(data,l,r); 3}v0{c  
} GP0[Y  
while(l SortUtil.swap(data,l,r); <.y;&a o  
SortUtil.swap(data,l,j); # w i&n  
' }y]mFpF  
if((l-i)>THRESHOLD){ (K!M*d+  
stack[++top]=i; v#{G8'+%  
stack[++top]=l-1; )*"T  
} +d|:s  
if((j-l)>THRESHOLD){ 8') .o hD  
stack[++top]=l+1; };4pZceV  
stack[++top]=j; ~5x4?2  
} ~NTDG  
g/fp45s  
} ly9x1`?$  
file://new InsertSort().sort(data); .~FKyP>[$  
insertSort(data); #JHy[!4  
} (jD'+ "?  
/** cg>!<T*  
* @param data k8!hvJ)?  
*/ UUt~W  
private void insertSort(int[] data) { ay!6 T`U`  
int temp; <L[T'ZE+  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "H wVK  
} Q"x`+?!  
} L{+&z7M  
} &ryl$!!3H  
.aVHd<M  
} 6{Krw \0  
g6x/f<2x  
归并排序: S,ouj;B  
R!:eYoQ  
package org.rut.util.algorithm.support; tuL\7 (R  
 hg<"Yg=  
import org.rut.util.algorithm.SortUtil; yf0vR%,\  
5i}CzA96  
/** cKvAR5|  
* @author treeroot 7C,<iY  
* @since 2006-2-2  r{; VTQ  
* @version 1.0 ~*,Ddwr0a  
*/ ]j%*"V  
public class MergeSort implements SortUtil.Sort{ DctX9U(  
x9FLr}e  
/* (non-Javadoc) ?0 KiR?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E7d~#  
*/ 48*Oh2BA  
public void sort(int[] data) { y@2vY[)3s  
int[] temp=new int[data.length]; #U\&i`  
mergeSort(data,temp,0,data.length-1); Huc3|~9  
} _RA{SO  
yBXkN&1=%;  
private void mergeSort(int[] data,int[] temp,int l,int r){ =|j*VF2y"  
int mid=(l+r)/2; (6b?ir~  
if(l==r) return ; =H.<"7  
mergeSort(data,temp,l,mid); nm{'HH-4  
mergeSort(data,temp,mid+1,r); \FY/eQ*07  
for(int i=l;i<=r;i++){ +R{A'Yl[(  
temp=data; 0XBBA0t q  
} E.zYi7YUKK  
int i1=l; XZUB*P}]D  
int i2=mid+1; d=xI   
for(int cur=l;cur<=r;cur++){ ;L\!g%a  
if(i1==mid+1) {Oc?C:aI=  
data[cur]=temp[i2++]; T_5*iwI  
else if(i2>r) ~#IWM+I  
data[cur]=temp[i1++]; >uP{9kDm  
else if(temp[i1] data[cur]=temp[i1++]; !.tL"U~4  
else &"~,V6,q  
data[cur]=temp[i2++]; .&* ({UM  
} =DmPPl{  
} vkNZ -`+I  
n;S0fg  
} L:k@BCQM  
7>W+Uq  
改进后的归并排序: 9}'l=b:Jms  
O|^6UH  
package org.rut.util.algorithm.support; 4X(1   
'aSZ!R  
import org.rut.util.algorithm.SortUtil; _^ CQ*+F  
z$8e6*  
/** ZPxOds1m  
* @author treeroot ;ZE<6;#3IP  
* @since 2006-2-2 >ji}j~cH  
* @version 1.0 $@ T6g  
*/ )+Y\NO?O  
public class ImprovedMergeSort implements SortUtil.Sort { gOES2 4$2  
g#9*bF  
private static final int THRESHOLD = 10; K\Y6 cj  
fxtYo,;$  
/* @'NaA SB  
* (non-Javadoc) =oKPMmpCZ  
* <Vr] 2mw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lhIr]'?l  
*/ Gr"2G,,VI  
public void sort(int[] data) { wFoR,oXtL/  
int[] temp=new int[data.length]; U# FJ8CD&u  
mergeSort(data,temp,0,data.length-1); ShsP]$Yp  
} fO^EMy\  
1VPN#Q!  
private void mergeSort(int[] data, int[] temp, int l, int r) { >FE QtD~F  
int i, j, k; u}@% 70A  
int mid = (l + r) / 2; -V<=`e  
if (l == r) dTU.XgX)1^  
return; 4o)\DB?!  
if ((mid - l) >= THRESHOLD) ?G%, k LJJ  
mergeSort(data, temp, l, mid); E%J7jA4  
else Do[ F+Y  
insertSort(data, l, mid - l + 1); %8`1Li6g  
if ((r - mid) > THRESHOLD) 0F;(_2V-  
mergeSort(data, temp, mid + 1, r); 7:R{~|R  
else /="D]K)%b8  
insertSort(data, mid + 1, r - mid); ^JF_;~C  
sP8-gkkor  
for (i = l; i <= mid; i++) { "#eNFCo7k  
temp = data; =-1^K  
} 5sV/N] !  
for (j = 1; j <= r - mid; j++) { 6Kv}2M')+  
temp[r - j + 1] = data[j + mid]; ?`[ uh%  
} o`y*yucHI  
int a = temp[l]; >FMT#x t  
int b = temp[r]; TF}4X;3Dsy  
for (i = l, j = r, k = l; k <= r; k++) { \ /X!tlwxh  
if (a < b) { WHD/s  
data[k] = temp[i++]; :xUl+(+  
a = temp; iYfLo">  
} else { {$QF*j  
data[k] = temp[j--]; {dSU \':  
b = temp[j]; iR}i42Cu  
} S;AnpiBM8  
} &0<R:K?>N  
} 7yCx !P;  
9|kEq>d  
/** p6eDd"Y  
* @param data Ll E_{||h  
* @param l G~$M"@Q7N  
* @param i li'1RKr  
*/ 0.+Z;j  
private void insertSort(int[] data, int start, int len) { g9r5t';  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W0?Y%Da(4m  
} 51(`wo>LS  
} d=5}^v#4  
} WUOPYYW<o  
} $P}]|/Yb  
F*jj cUk  
堆排序: t%YX-@  
/Geks/  
package org.rut.util.algorithm.support; Qmc;s{-r;  
.Mft+,"  
import org.rut.util.algorithm.SortUtil; `\u),$  
[{!j9E?(  
/** z1KC$~{O  
* @author treeroot u{lDof>  
* @since 2006-2-2 /*p?UW<*4  
* @version 1.0 6Bq2?;5  
*/ Qc =lf$  
public class HeapSort implements SortUtil.Sort{ 8!fAv$g0  
hu*>B  
/* (non-Javadoc) %IH|zSr)EM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9oau _Q#  
*/ )1yUV*6  
public void sort(int[] data) { ujHzG}2z  
MaxHeap h=new MaxHeap(); 'FA)LuAok  
h.init(data); TboHP/  
for(int i=0;i h.remove(); L!Zxc~  
System.arraycopy(h.queue,1,data,0,data.length); NVh>Q>B$_  
} 2,QApW_Y  
'N,NG$G2  
private static class MaxHeap{ 6Oqnb+  
D30Z9_^%:  
void init(int[] data){ mM^8YL  
this.queue=new int[data.length+1]; T+`GOFx  
for(int i=0;i queue[++size]=data; ppo$&W &z  
fixUp(size); H=SMDj)s+  
} :x5o3xE  
} Pv$"DEXA2  
bFdg '_  
private int size=0; d~bH!P  
mbG^fy'  
private int[] queue; WF.$gBH"  
8_,wOkk_B  
public int get() { d.(]V2X.J  
return queue[1]; jE5 9h  
} ^0?cyv\>LA  
)^2jsy -/  
public void remove() { QR"O)lP  
SortUtil.swap(queue,1,size--); n_ NG~ /x  
fixDown(1); )^@V*$D  
} %B un@  
file://fixdown VqT[ca\  
private void fixDown(int k) { 52R.L9Ai  
int j; RuEnr7gi  
while ((j = k << 1) <= size) { *wZV*)}  
if (j < size %26amp;%26amp; queue[j] j++; -EIMh^  
if (queue[k]>queue[j]) file://不用交换 hnL gsz  
break; 7}7C0mV3  
SortUtil.swap(queue,j,k); BCDf9]X  
k = j; ]qG5 Ne _  
} n~cm?"  
} 8i$`oMv[y  
private void fixUp(int k) { #:5g`Ch4,  
while (k > 1) { 0_Z|y/I.  
int j = k >> 1;  Jy[8,X  
if (queue[j]>queue[k]) aZ0iwMK  
break; 8}b[Q/h!  
SortUtil.swap(queue,j,k); cx%9UK*c  
k = j; -r0\  
} 3\~fe/z'I  
} 3T^dgWXEG  
wbKBwI5w  
} ~l(tl[  
B9Tztg  
} \B +SzW  
`fh_8%m]*  
SortUtil: gM[ J'DMW  
g 5N<B+?!i  
package org.rut.util.algorithm; (w  
5Kxk9{\8  
import org.rut.util.algorithm.support.BubbleSort; siZ_JJW  
import org.rut.util.algorithm.support.HeapSort; L. ?dI82c  
import org.rut.util.algorithm.support.ImprovedMergeSort; gx R|S  
import org.rut.util.algorithm.support.ImprovedQuickSort; W 9MZ  
import org.rut.util.algorithm.support.InsertSort; m&c(N  
import org.rut.util.algorithm.support.MergeSort; Olh-(u:9+O  
import org.rut.util.algorithm.support.QuickSort; mK&9p{4#U  
import org.rut.util.algorithm.support.SelectionSort; l'8wPmy%N  
import org.rut.util.algorithm.support.ShellSort; i_^NbC   
I`>%2mP[C  
/** D??/=`|8  
* @author treeroot dp W%LXM_  
* @since 2006-2-2 UC$+&&rO  
* @version 1.0 q)y8Bv|  
*/ ]KT,s].  
public class SortUtil { [:'?}p  
public final static int INSERT = 1; \`5u@Nzx  
public final static int BUBBLE = 2; ,B>b9,~3a  
public final static int SELECTION = 3; euC,]n.  
public final static int SHELL = 4; ee[NZz  
public final static int QUICK = 5; Pt;Ahmi  
public final static int IMPROVED_QUICK = 6; RIx6& 7$  
public final static int MERGE = 7; iFchD\E*o  
public final static int IMPROVED_MERGE = 8; UHHKI)(  
public final static int HEAP = 9; .[ s82c]]6  
hvZR4|k>  
public static void sort(int[] data) { CUcjJ|MZ  
sort(data, IMPROVED_QUICK); mQuaO# I,  
} Qn&^.e9I  
private static String[] name={ z3LPR:&Z  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C^O^Jj5X%  
}; K<(sqH  
1<e%)? G  
private static Sort[] impl=new Sort[]{ >7Q7H#~w  
new InsertSort(), %*}f<k{6  
new BubbleSort(), <7) 6*u  
new SelectionSort(), Lxrn#Z eM  
new ShellSort(), 2 -8:qmP(  
new QuickSort(), 8 z7,W3b  
new ImprovedQuickSort(), P#oV ^  
new MergeSort(), {Oszq(A  
new ImprovedMergeSort(), >:|q J$J.  
new HeapSort() nP5fh_/  
}; 1OS3Gv8jc~  
POs~xaZ`H  
public static String toString(int algorithm){ %W@IB8]Vr  
return name[algorithm-1]; ( "z;Q?(  
} g+*[CKO{  
fdW={}~  
public static void sort(int[] data, int algorithm) { bd}SB-D  
impl[algorithm-1].sort(data); ?QVI'R:Z?  
} -2d&Aq4m)  
;Nij*-U4~  
public static interface Sort { I/|n ma/ $  
public void sort(int[] data); }Cf[nGh|B  
} L<`g}iw  
9x,+G['Zt  
public static void swap(int[] data, int i, int j) { )5x?Qn(B  
int temp = data; Fowh3go  
data = data[j]; A[a+,TN {  
data[j] = temp; P://Zi6>  
} S45_-aE  
} ,BAF?} 04=  
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