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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。 %@aSe2B  
插入排序: ZY={8T@  
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package org.rut.util.algorithm.support; =[{i{x|Qz  
33x{CY15  
import org.rut.util.algorithm.SortUtil; bHYy}weZ  
/** X/!o\yyT  
* @author treeroot @f~RdO3  
* @since 2006-2-2 wE>\7a*P%  
* @version 1.0 iL&fgF"'  
*/ 6r0krbN  
public class InsertSort implements SortUtil.Sort{ K(rWNO  
_ QI\  
/* (non-Javadoc) z+wA rPxc  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tbih+# ?  
*/ CS5?Ti6  
public void sort(int[] data) { 'RR~7h  
int temp; '~<m~UXvD#  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); #aJ(m&  
} sN*N&XG  
} . B9iLI  
} LVfF[  
Ecefi pG  
} &K.d'$q  
m+R[#GE8#  
冒泡排序: 3?9IJ5p  
YeL#jtC  
package org.rut.util.algorithm.support; J.b9F:&}  
t;Sb/3  
import org.rut.util.algorithm.SortUtil; NjScc%@y  
QB uMJm  
/** Q7\w+ANf0  
* @author treeroot [< ?s?Ci  
* @since 2006-2-2 ;>yxNGV`  
* @version 1.0 &*,#5.  
*/ I\{ 1u  
public class BubbleSort implements SortUtil.Sort{ 9'giU r  
@7]yl&LZ  
/* (non-Javadoc) oy=js -  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1\ ~ "VF*{  
*/ ? 7n`A >T  
public void sort(int[] data) { =_2jK0+}l  
int temp; ,t?B+$E  
for(int i=0;i for(int j=data.length-1;j>i;j--){ k8[n+^  
if(data[j] SortUtil.swap(data,j,j-1); mbxZL<ua  
} h$>-.-  
} 9gDkTYkj  
} b\kdKVh&  
} ;kQhx6Z  
f!uwzHA`?  
} @[<><uTH  
b9J_1Gl]  
选择排序: R6Km\N  
OJuG~euy  
package org.rut.util.algorithm.support; wj^3N7_:w  
V)HG(k  
import org.rut.util.algorithm.SortUtil; kR-SE5`Jk  
Nho>f  
/** L^2%1GfE{  
* @author treeroot #ym'AN  
* @since 2006-2-2 fI}to&qk  
* @version 1.0 -`kW&I0  
*/ W0@n/U  
public class SelectionSort implements SortUtil.Sort { vXf!G`D  
feDlH[$  
/* t7Iv?5]N  
* (non-Javadoc) |O|V-f{l  
* |!3DPA(_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  4iazNl#  
*/ w !-gJmX>  
public void sort(int[] data) { l'-Bu(  
int temp; qFCOUl  
for (int i = 0; i < data.length; i++) { %9F([K  
int lowIndex = i; vjGo;+K  
for (int j = data.length - 1; j > i; j--) { *=/ { HvJ  
if (data[j] < data[lowIndex]) { Cazocq5  
lowIndex = j; @sW24J1q+  
} x_N'TjS^{  
} x;P_1J%Q  
SortUtil.swap(data,i,lowIndex); RUnSCOdX  
} _?m(V=z>  
} Eex~xiiV  
x:NY\._  
} 0WW2i{7`U  
}(J}f)  
Shell排序: ;;OAQ`  
eCU:Q  
package org.rut.util.algorithm.support; X1x#6 oi  
h6D<go-b56  
import org.rut.util.algorithm.SortUtil; TCwFPlF|  
o4F2%0gJ  
/** +s,=lL  
* @author treeroot 3=P]x ;[ba  
* @since 2006-2-2 6 6EV$*dRL  
* @version 1.0 NqazpB*  
*/ w7.V6S$Ga  
public class ShellSort implements SortUtil.Sort{ +K:Dx!9  
bQg:zww  
/* (non-Javadoc) Ha0M)0Anv  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #C74z$  
*/ /!yU !`bY  
public void sort(int[] data) { OhQgF  
for(int i=data.length/2;i>2;i/=2){ %op**@4/t\  
for(int j=0;j insertSort(data,j,i); )1J R#  
} n`B:;2X,  
} Ct<udO  
insertSort(data,0,1); H7&8\ FNa  
} FF`T\&u  
 9X+V4xux  
/** wj$<t'MN  
* @param data ~rqCN,=d  
* @param j urs,34h  
* @param i .LnGL]/  
*/ q.^;!f1  
private void insertSort(int[] data, int start, int inc) { 8?#/o c  
int temp; rK6l8)o  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); i4Q@K,$  
} O'p9u@kc  
} 5,lEx1{_  
} hP%M?MKC  
y{B=-\O]  
} oQ/E}Zk@  
f M :]&  
快速排序: T?CdZc.  
ouvA~/5  
package org.rut.util.algorithm.support; %ufN8w!p  
Af~$TyX  
import org.rut.util.algorithm.SortUtil; -e"H ^:  
6xx<Y2@  
/** ~~/|dh5  
* @author treeroot 9IdA%RM~mH  
* @since 2006-2-2 \$~|ZwV{  
* @version 1.0 \g&,@'uh  
*/ [B*x-R[FI  
public class QuickSort implements SortUtil.Sort{ HTv2#  
vFzRg5lH  
/* (non-Javadoc) }^ ~F|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !I{0 _b{  
*/ p}z<Fdu 0  
public void sort(int[] data) { hn7# L  
quickSort(data,0,data.length-1); >W=,j)MA  
} ;LKkbT 5  
private void quickSort(int[] data,int i,int j){  L^/5ux  
int pivotIndex=(i+j)/2; e9Wa<i 8  
file://swap hE'-is@7  
SortUtil.swap(data,pivotIndex,j); 4$HhP, gL=  
) yi E@ X  
int k=partition(data,i-1,j,data[j]); Fj8z  
SortUtil.swap(data,k,j); P-9)38`5  
if((k-i)>1) quickSort(data,i,k-1); kr^P6}'  
if((j-k)>1) quickSort(data,k+1,j); :".ARCg  
]`!>6/[  
} ,a{P4Bq  
/** ;IvY^(YS@;  
* @param data 8rAg \H3E  
* @param i ?8H8O %Z8  
* @param j G/y5H;<9M  
* @return ]!W=^!  
*/ A_"w^E{P  
private int partition(int[] data, int l, int r,int pivot) { U|H=Y"pL  
do{ 6##_%PO<m  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ;0]aq0_#(  
SortUtil.swap(data,l,r); xk9%F?)  
} L81ZbNU?$  
while(l SortUtil.swap(data,l,r); */5d>04  
return l; 7~G9'P<  
} 4B8 oO  
XFVE>/H  
} fh&nu"&  
{Y(zd[  
改进后的快速排序: Z\bmW%av  
<yV"6/l 0  
package org.rut.util.algorithm.support; ,i ^9 |Oeq  
k$^UUo6  
import org.rut.util.algorithm.SortUtil; V@.Ior}w  
ih-#5M@  
/** gMi0FO'  
* @author treeroot //up5R_nx  
* @since 2006-2-2 kYE9M8s;  
* @version 1.0 >4x(e\B  
*/ { T/[cu<  
public class ImprovedQuickSort implements SortUtil.Sort { T= 80,  
\i>?q   
private static int MAX_STACK_SIZE=4096; Fk&c=V;SU  
private static int THRESHOLD=10; o"s)eh  
/* (non-Javadoc) W<h)HhyG  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u74[>^  
*/ `z}?"BW|  
public void sort(int[] data) { yt+L0wzzB  
int[] stack=new int[MAX_STACK_SIZE]; (fH#I tf  
[~+wk9P  
int top=-1; 2"v6 >b%  
int pivot; j.[.1G*("  
int pivotIndex,l,r; zF`0J  
&Q/W~)~  
stack[++top]=0; F>Ah0U0  
stack[++top]=data.length-1; z#9aP&8Q  
 h},IF  
while(top>0){ udK%>  
int j=stack[top--]; X;+sUj8  
int i=stack[top--]; %_H<:uGO%  
a K[&V't~  
pivotIndex=(i+j)/2; wA ,6bj  
pivot=data[pivotIndex]; *xAqnk   
~f2z]JLr:  
SortUtil.swap(data,pivotIndex,j); w?PkO p  
Qab>|eSm  
file://partition Ve$o}h-  
l=i-1; J'6PmPzY|  
r=j; Xz 6<lLb  
do{ YR\faVk  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); olB.*#gA  
SortUtil.swap(data,l,r); o+iiST JEe  
} 7DogM".}~Q  
while(l SortUtil.swap(data,l,r); ~Y[r`]X`"m  
SortUtil.swap(data,l,j); Df-DRi  
/obfw^  
if((l-i)>THRESHOLD){ a@K%06A;'  
stack[++top]=i; R`5.[?Dt  
stack[++top]=l-1; 4d4ZT?V[  
} ;J( 8 L  
if((j-l)>THRESHOLD){ V;VHv=9`o  
stack[++top]=l+1; 3Y4?CM&0v  
stack[++top]=j; 94`7a<&ZNL  
} LtF,kAIt7v  
[-1^-bb  
} @}u*|P*  
file://new InsertSort().sort(data); h%na>G  
insertSort(data); dA}-]  
} x M/+L:_<  
/** Ys9[5@7  
* @param data T9|m7  
*/ 79rD7D&g  
private void insertSort(int[] data) { .^33MWu6  
int temp; aH(J,XY  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ,Q$ q=E;X  
} GTPHVp&y  
} :wyno#8`-  
} Vi$~-6n&  
"m$##X\  
} IZ-1c1   
tyDU @M  
归并排序: h|9L5  
 R Z?jJm$  
package org.rut.util.algorithm.support; nIf1sH>  
8mrUotjS  
import org.rut.util.algorithm.SortUtil; 9 RgVK{F  
6dr%;Wp  
/** PcMD])Z{G  
* @author treeroot r| wS<cA2  
* @since 2006-2-2 s-!ArB,  
* @version 1.0 #powub  
*/ z]y.W`i   
public class MergeSort implements SortUtil.Sort{ J7$5s  
,5p(T_V/  
/* (non-Javadoc) |Pax=oJ\M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %)8}X>xq  
*/ =_*Zn(>t`  
public void sort(int[] data) { '?' l;#^i<  
int[] temp=new int[data.length]; wh`"w7br  
mergeSort(data,temp,0,data.length-1); nsC3  
} Xf]d. :  
8U"v6S~A%Q  
private void mergeSort(int[] data,int[] temp,int l,int r){ K:[F%e  
int mid=(l+r)/2; epe)a  
if(l==r) return ; CI0C1/:@  
mergeSort(data,temp,l,mid); |kg7LP3(8,  
mergeSort(data,temp,mid+1,r); |$Sedzj'  
for(int i=l;i<=r;i++){ N7zft  
temp=data; ?pmHFlx  
} VQt0  4?  
int i1=l; 3,3N^nSD  
int i2=mid+1; h 0Q5-EA  
for(int cur=l;cur<=r;cur++){ 9d659i C  
if(i1==mid+1) ^98~U\ar  
data[cur]=temp[i2++]; UYJZYP%r  
else if(i2>r) 13=AW  
data[cur]=temp[i1++]; kd(8I_i@  
else if(temp[i1] data[cur]=temp[i1++]; O"9\5(w  
else oxA<VWUNT  
data[cur]=temp[i2++]; zT]8KA   
} lIS-4QX1  
} e{K 215  
-zgI_u9=EB  
} hBUn \~z  
`i*E~'  
改进后的归并排序: w+|L+h3L7  
$szqy?i 0?  
package org.rut.util.algorithm.support; 5r|,CQ7o  
OX!tsARC@  
import org.rut.util.algorithm.SortUtil; 19)i*\+  
ES7>H  
/** -<!NXm|kvz  
* @author treeroot 4N3R|  
* @since 2006-2-2 !9r$e99R  
* @version 1.0 $k%2J9O  
*/ 7(8;t o6(  
public class ImprovedMergeSort implements SortUtil.Sort { BC.87Fji/  
_C?hHWSf"  
private static final int THRESHOLD = 10; 9~XA q^e  
Rtl"Ub@HV  
/* `(V3:F("@  
* (non-Javadoc) q"J]%zO  
* sIGMA$EK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S`0(*A[W*  
*/ u|TeE\0  
public void sort(int[] data) { %T%sGDCV  
int[] temp=new int[data.length]; 1};Stai'  
mergeSort(data,temp,0,data.length-1); 9}<ile7^  
} <0&*9ZeD  
pJ"qu,w  
private void mergeSort(int[] data, int[] temp, int l, int r) { IueFx u  
int i, j, k; )23H1  
int mid = (l + r) / 2; l'.VKh\C  
if (l == r) Ckuh:bs  
return; <uw9DU7G  
if ((mid - l) >= THRESHOLD) m8hk:4Ae  
mergeSort(data, temp, l, mid); g7`LEF <A  
else  w``ST  
insertSort(data, l, mid - l + 1); <)c)%'v  
if ((r - mid) > THRESHOLD) 9IfmW^0  
mergeSort(data, temp, mid + 1, r); ;))+>%SGCt  
else c9u`!'g`i  
insertSort(data, mid + 1, r - mid); K!Y71_#  
Yu^4VXp~M%  
for (i = l; i <= mid; i++) { ~Otoqu|  
temp = data; m nX2a  
} :KP @RZm  
for (j = 1; j <= r - mid; j++) { 6}Ci>_i4#  
temp[r - j + 1] = data[j + mid]; ag[wdoj  
} H=vUYz  
int a = temp[l]; `0gyr(fES  
int b = temp[r]; R"t,xM  
for (i = l, j = r, k = l; k <= r; k++) { WO>nIo5Y  
if (a < b) { D8?Vn"  
data[k] = temp[i++]; s$`0yGmQ  
a = temp; D'PI1 0t  
} else { T_5H&;a  
data[k] = temp[j--]; =K[yT:  
b = temp[j]; [<yaXQxl  
} P{>!5|k  
} >jLY"  
} yjJ5>cg  
@:vwb\azVD  
/** `kXs;T6&  
* @param data y/7\?qfTk  
* @param l ~P **O~  
* @param i :{l_FY436  
*/ qt"m  
private void insertSort(int[] data, int start, int len) { MH\dC9%p  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \V~eVf;~  
} Moza".fiN  
} J<h $ wM  
} rw JIx|(  
} bwMm#f  
0=1T.4+=  
堆排序: N5 6g+,w%)  
Z=o2H Bm7  
package org.rut.util.algorithm.support; 3bH'H*2  
aeM+ d`f  
import org.rut.util.algorithm.SortUtil; n 0L^e  
=X:Y,?  
/** 0~/_|?]`7  
* @author treeroot z46~@y%k  
* @since 2006-2-2  d{3QP5  
* @version 1.0 }|NCboM^_  
*/ Y.rsR 6  
public class HeapSort implements SortUtil.Sort{ n;Vs_u/Nx  
"]Xc`3SM  
/* (non-Javadoc) OA;XiR$xP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ai3*QX  
*/ I,vJbvvl!  
public void sort(int[] data) { c`w}|d]mC  
MaxHeap h=new MaxHeap(); ~=l;=7 T  
h.init(data); 7;wd(8  
for(int i=0;i h.remove(); `|& O*`  
System.arraycopy(h.queue,1,data,0,data.length); @lrztM  
} -x`@6  
:*9Wh  
private static class MaxHeap{ `+:`_4  
Fywv  
void init(int[] data){ RMu~l@  
this.queue=new int[data.length+1]; <R=Zs[9M1  
for(int i=0;i queue[++size]=data; lzVq1@B  
fixUp(size); /t$d\b17pX  
} {B*s{{[/'  
} R$[vm6T?  
>!1-lfa8  
private int size=0; vV-`jsq20H  
w%jII{@,  
private int[] queue; A#iV=76_  
]jp6k<KF  
public int get() { 1K50Z.o&@  
return queue[1]; Y&Z.2>b  
} GH$pKB  
R8Fv{7]c  
public void remove() { Ean5b>\  
SortUtil.swap(queue,1,size--); =W!/Z%^*8  
fixDown(1); 5K8^WK  
} $5%SNzzl  
file://fixdown ;+ hH  
private void fixDown(int k) { e8?jmN`2  
int j; l}A93jSL  
while ((j = k << 1) <= size) { M&9+6e'-F  
if (j < size %26amp;%26amp; queue[j] j++; 60?%<oJ oH  
if (queue[k]>queue[j]) file://不用交换 T!)(Dv8@F  
break; PIS2Ed]  
SortUtil.swap(queue,j,k); -k"/X8  
k = j; P8/0H(,  
} '3^'B0 3  
} *_\_'@1|J)  
private void fixUp(int k) { Yufc{M00  
while (k > 1) { $suzW;{#  
int j = k >> 1; v O_*yh1  
if (queue[j]>queue[k]) :nOFR$ W  
break; ":QZy8f9%  
SortUtil.swap(queue,j,k); TJXT-\Vk  
k = j; w@w(-F!%l  
} 8P&:_T!  
} ZyFjFHe+  
z1X`o  
} <*cikXS  
D_zZXbNc  
} suDQ~\ n  
hf&9uHN%7m  
SortUtil: f x+/C8GK  
88wa7i*  
package org.rut.util.algorithm; ri-b=|h2j  
oE]QF.n#  
import org.rut.util.algorithm.support.BubbleSort; -]M5wb2,  
import org.rut.util.algorithm.support.HeapSort; G2: agqL/  
import org.rut.util.algorithm.support.ImprovedMergeSort; 8VXH+5's  
import org.rut.util.algorithm.support.ImprovedQuickSort; _u QOHwn  
import org.rut.util.algorithm.support.InsertSort; 8&b,qQ~  
import org.rut.util.algorithm.support.MergeSort; O)r4?<Q  
import org.rut.util.algorithm.support.QuickSort; WOL:IZX%  
import org.rut.util.algorithm.support.SelectionSort; L$M9w  
import org.rut.util.algorithm.support.ShellSort; cTTL1SW  
{kR#p %E]  
/** > /caXvS  
* @author treeroot )bscBj@  
* @since 2006-2-2 3AN/ H  
* @version 1.0 XUuN )i  
*/ $*=<Yw4  
public class SortUtil { bY~pc\V:`w  
public final static int INSERT = 1; 'E""amIJ  
public final static int BUBBLE = 2; oe-\ozJ0  
public final static int SELECTION = 3; L) T (<  
public final static int SHELL = 4; Qh\60f>0  
public final static int QUICK = 5;  H6/$d  
public final static int IMPROVED_QUICK = 6; [S!/E4>['  
public final static int MERGE = 7; svH !1 b  
public final static int IMPROVED_MERGE = 8; 1o{Mck  
public final static int HEAP = 9; 2`=7_v  
_KAQ}G3  
public static void sort(int[] data) { ]Er$*7f  
sort(data, IMPROVED_QUICK); ;>7De8v@@  
} Q*~]h;6\{d  
private static String[] name={ z!9-:  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >e$PP8&i_T  
}; TAW/zpps$  
]N F[>uiW  
private static Sort[] impl=new Sort[]{ 7WZ+T"O{I  
new InsertSort(), ePo}y])2  
new BubbleSort(), gc$l^`+M  
new SelectionSort(), Oxd]y1  
new ShellSort(), :eVq#3}  
new QuickSort(), DEZve Qr=  
new ImprovedQuickSort(), H"WprHe  
new MergeSort(), hkQ"OsU  
new ImprovedMergeSort(), XlR@pr6tw  
new HeapSort() tK\~A,=  
}; E hMNap}5"  
z-)O9PV  
public static String toString(int algorithm){ Lw>N rY(Y  
return name[algorithm-1]; BnasI;yWb  
} wz%Nb Ly-  
*gWwALGo5  
public static void sort(int[] data, int algorithm) { $-sHWYZ  
impl[algorithm-1].sort(data); Uz]|N6`  
} YNi.SXH  
vy I!]p  
public static interface Sort { }&D32\  
public void sort(int[] data); U-M>=3|N  
} +52{-a,>  
-nV9:opD  
public static void swap(int[] data, int i, int j) { I b5rqU\  
int temp = data; E~"y$Fqe  
data = data[j]; o?\?@H  
data[j] = temp; / %io+94  
} C;^X[x%h7$  
} ~Z' ?LV<t  
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