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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。 ;a*i*{\Rm  
插入排序: <{JHFU`^  
!Yz~HO,u+  
package org.rut.util.algorithm.support; 'cu( Sd}  
z ~T[%RjO  
import org.rut.util.algorithm.SortUtil; s-J>(|  
/** -H#{[M8xX  
* @author treeroot D/"[/!  
* @since 2006-2-2 l!EfvqWX  
* @version 1.0 ,0[bzk  
*/ S9t_2%e  
public class InsertSort implements SortUtil.Sort{ YR=<xn;m.  
cL7je  
/* (non-Javadoc) p9y "0A|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RgZBh04q  
*/ &NL=Bd  
public void sort(int[] data) { EL;IrtU  
int temp; w$u=_  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); dc|"34;^"  
} %F` c Nw]  
} k^:$ETW2 D  
} j]6 Z*AxQ  
&>ii2% 4  
} !LVWggk1  
P*BA  
冒泡排序: r=~yUT  
x;?4AJ{  
package org.rut.util.algorithm.support; D\jRF-z  
=hH>]$J[  
import org.rut.util.algorithm.SortUtil; kS%FV;9>(  
 I QS|  
/** lc,{0$ 1<  
* @author treeroot ={o>g '  
* @since 2006-2-2 s =! y%  
* @version 1.0 <=l!~~%  
*/ qH: ` O%,  
public class BubbleSort implements SortUtil.Sort{ \f}S Hh  
&HNJ '  
/* (non-Javadoc) 4/&Us  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ><mZOTn e;  
*/ TxoMCN?7c  
public void sort(int[] data) { be|k"s|6)  
int temp; nw+L _b  
for(int i=0;i for(int j=data.length-1;j>i;j--){ $6L gaz  
if(data[j] SortUtil.swap(data,j,j-1); &.y:QVR,!  
} 47ppyh6@  
} 0m(/hK  
} rUvqAfE&+  
} . p^='Kz?  
I3uaEv7OZc  
} <x,u!}5J  
i/2OE&*O[  
选择排序: Qx1ZxJz #  
5"u-oE&  
package org.rut.util.algorithm.support; 6;60}y  
}QU9+<Z[r  
import org.rut.util.algorithm.SortUtil; }L^Yoq]  
IsxPm9P2<  
/** (cAv :EKpo  
* @author treeroot +Pd&YfU9  
* @since 2006-2-2 _A|1_^[G(  
* @version 1.0 ,UopGlA ,  
*/ 4(o: #9I  
public class SelectionSort implements SortUtil.Sort { LzB)o\a  
=u QCm#  
/* g dT3,8`#[  
* (non-Javadoc) Y5&Jgn.l  
* 1_%jDMYH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .;ml[DXH  
*/ <mjH#aSy  
public void sort(int[] data) { nud,ag  
int temp; )tl=tH/$  
for (int i = 0; i < data.length; i++) { */sVuD^b`  
int lowIndex = i; Z#BwJHh  
for (int j = data.length - 1; j > i; j--) { H=?v$! i  
if (data[j] < data[lowIndex]) { 0 60<wjX6  
lowIndex = j; l~!Tnp\M  
} ~ nNsq(4  
} _6Wz1.]n  
SortUtil.swap(data,i,lowIndex); HK) $ls  
} j*t>CB4  
} r5%K2q{  
#F@53N  
} !f-mC,d  
5\8Ig f>  
Shell排序: ;W]NT 4p  
Y$uXBTR`y/  
package org.rut.util.algorithm.support; oe_l:Y%  
qUA&XUJ  
import org.rut.util.algorithm.SortUtil; VJJGTkm  
 *>j u1f  
/** xRpL\4cs  
* @author treeroot 'uBXSP#  
* @since 2006-2-2 ny%-u &1k  
* @version 1.0 z)xGZ*{=  
*/ ;Xg6'yxJ  
public class ShellSort implements SortUtil.Sort{ &>\E >mJ  
`Jhu&MWg  
/* (non-Javadoc) ~z#Faed=a  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A ^ $9[_  
*/ aF2 eGh  
public void sort(int[] data) { #~*fZ|sq+3  
for(int i=data.length/2;i>2;i/=2){ ';us;xR#  
for(int j=0;j insertSort(data,j,i); I1^0RB{~  
} S1(. AI~  
} ]b4*`}\  
insertSort(data,0,1); ftq&<8  
} y;<^[  
XmXp0b7  
/** ,u^i0uOg  
* @param data zD}dvI}  
* @param j "P\k_-a'  
* @param i Y,I0o{,g  
*/  Q<B=m6~  
private void insertSort(int[] data, int start, int inc) { P$S>=*`n U  
int temp; 6f,#O8]#5  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); u:& gp  
} YqX/7b+  
} VFz (U)._  
} 2#~5[PtP^  
w]X~I/6g  
} z1wy@1o'  
|K| c  
快速排序: s <Pk[7`*  
]n1@!qa48  
package org.rut.util.algorithm.support; .9{Sr[P  
[U@#whEO  
import org.rut.util.algorithm.SortUtil; unKTa*U^q  
|_/q0#"  
/** y3 @R>@$  
* @author treeroot :\9E%/aAD  
* @since 2006-2-2 sYM3&ikyHI  
* @version 1.0 hE0 p> R8  
*/ O`5PX(J1&  
public class QuickSort implements SortUtil.Sort{ U1G"T(;s:  
jR`q  y<  
/* (non-Javadoc) Tm~a& p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L^uO.eI"m  
*/ $50A!h  
public void sort(int[] data) { e}Cp;c]=  
quickSort(data,0,data.length-1); "- @{ )  
} fa9c!xDt  
private void quickSort(int[] data,int i,int j){ 3Xyu`zS&   
int pivotIndex=(i+j)/2; wR +C>  
file://swap ' _Ij9{M  
SortUtil.swap(data,pivotIndex,j); ukb2[mb*u  
QxG:NN;jW  
int k=partition(data,i-1,j,data[j]); Ae R3wua  
SortUtil.swap(data,k,j); ce-5XqzY@  
if((k-i)>1) quickSort(data,i,k-1); Q$Qs$  
if((j-k)>1) quickSort(data,k+1,j); 'D(|NYY  
H+y(W5|2/X  
} `wz@l:e  
/** kaf4GME]  
* @param data xU+c?OLi  
* @param i oV"#1lp*  
* @param j l\< *9m<  
* @return >utm\!Gac  
*/ ua[ d  
private int partition(int[] data, int l, int r,int pivot) { ZZk6 @C  
do{ BS*IrH H  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); }bIbMEMn  
SortUtil.swap(data,l,r); ee}&~%  
} hbdq'2!Qr  
while(l SortUtil.swap(data,l,r); 89ivyv;]U  
return l; dlkxA^  
} },G6IuH%  
D]n9+!Ec1f  
} W,dqk=n  
,?g}->ZB  
改进后的快速排序: HLm6BtE  
N9@@n:JT  
package org.rut.util.algorithm.support; uLXMEx<^  
^x(BZolkm  
import org.rut.util.algorithm.SortUtil; #AHX{<  
v&6I\1  
/** gz8>uGx&V!  
* @author treeroot mTXeIng?  
* @since 2006-2-2 +Qy0K5Ee  
* @version 1.0 0Snl_@s  
*/ W(U:D?e  
public class ImprovedQuickSort implements SortUtil.Sort { S_?{ <{  
pv);LjF  
private static int MAX_STACK_SIZE=4096; {"hX_t  
private static int THRESHOLD=10; KY 085Fvs  
/* (non-Javadoc) #rnO=N8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M ^gva?{  
*/ <Vucr   
public void sort(int[] data) { V ':?rEN|  
int[] stack=new int[MAX_STACK_SIZE]; zzOc # /  
yg34b}m{  
int top=-1; B^Y AKbY  
int pivot; 6t@kft>Nv  
int pivotIndex,l,r; 9XtR8MH  
I- oY@l`  
stack[++top]=0; l]tda(  
stack[++top]=data.length-1; CqHCJ '  
k$]-fQM  
while(top>0){ b#\i]2b:  
int j=stack[top--]; *b#00)d  
int i=stack[top--]; ]M%kt+u!  
A/ppr.  
pivotIndex=(i+j)/2; RMJq9a  
pivot=data[pivotIndex]; 0 _ 4p>v:  
u.W}{-+kp  
SortUtil.swap(data,pivotIndex,j); d +0(H   
qQ\&]  
file://partition V`:iu n^f  
l=i-1; J*HZ=6L  
r=j; JAPiR=  
do{ XL!\Lx  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); nO-1^HUl  
SortUtil.swap(data,l,r); $&IF#uDf  
} e$!01Y$HI  
while(l SortUtil.swap(data,l,r); sXe=4`O  
SortUtil.swap(data,l,j); YI[y/~!  
S ?v^/F  
if((l-i)>THRESHOLD){ xZ2^lsY  
stack[++top]=i; fePt[U)2  
stack[++top]=l-1; U Px7u%Do  
} .A 12Co  
if((j-l)>THRESHOLD){ }EFMJ,NQ  
stack[++top]=l+1; ^|Bpo(  
stack[++top]=j; -jN:~.  
} G.Z4h/1<  
Z*r;"WHB  
} qu>5 rg-  
file://new InsertSort().sort(data); EPO*{bN7O  
insertSort(data); Tgxxm  
} $'m&RzZ  
/** %K@s0uQ  
* @param data _g{*;?mS  
*/ k Qm\f  
private void insertSort(int[] data) { lJZ-*"9V  
int temp; 7,vvL8\NHu  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :yPA6O 4  
} &U <t*"  
} {|cuu"j26  
} /m#!<t7  
u~ %xU~v  
} x.gRTR`7(  
M? 7CBqZ  
归并排序: kl4u]MyL#  
f~bZTf  
package org.rut.util.algorithm.support; <hG] f%  
#L,>)XkjS  
import org.rut.util.algorithm.SortUtil; NR98I7  
a3i;r M2  
/** ~Ey)9phZK  
* @author treeroot VE_%/Fs,  
* @since 2006-2-2 "XvM1G&s`  
* @version 1.0 K8>-%ns  
*/ i;+]Y   
public class MergeSort implements SortUtil.Sort{ R 2.y=P8N  
XLG6f(B=F  
/* (non-Javadoc) {~cG'S Y%  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3RYg-$NK[  
*/ Xgq-r $O2X  
public void sort(int[] data) { "l83O8 L  
int[] temp=new int[data.length]; 2y_R05O0  
mergeSort(data,temp,0,data.length-1); ykq9]Xqhv  
} >$^v@jf  
=^nb-9.  
private void mergeSort(int[] data,int[] temp,int l,int r){ e G8Zn<:s  
int mid=(l+r)/2; RDFOUqS  
if(l==r) return ; X9:4oMux7  
mergeSort(data,temp,l,mid); g7>p,  
mergeSort(data,temp,mid+1,r); 8Xo`S<8VS  
for(int i=l;i<=r;i++){ s#f6qj  
temp=data; I @sXmC2$\  
} CqF= 5z:A  
int i1=l; ]J`yh$a  
int i2=mid+1; t,CC~  
for(int cur=l;cur<=r;cur++){ <OYy ;s  
if(i1==mid+1) oh>X/uj  
data[cur]=temp[i2++]; DM*GvBdR  
else if(i2>r) nMz~.^Q-  
data[cur]=temp[i1++]; B Q) 1)8r  
else if(temp[i1] data[cur]=temp[i1++]; |dP[_nh?  
else -;VKtBXP</  
data[cur]=temp[i2++]; m\h. sg&  
} _dg2i|yP<  
} +a@:?=hc  
*ud"?{)Z  
} lQ t&K1m  
jg,oGtRz  
改进后的归并排序:  vbol 70  
, [ogh  
package org.rut.util.algorithm.support; d-cK`pSB  
47(/K2  
import org.rut.util.algorithm.SortUtil; hvc%6A\nm  
n aQ0TN,  
/** *{/L7])gm  
* @author treeroot /Ah|Po  
* @since 2006-2-2 ,{KjVv<  
* @version 1.0 *jAw  
*/ vocXk_  
public class ImprovedMergeSort implements SortUtil.Sort { {{3n">s}:  
fJjtrvNy)  
private static final int THRESHOLD = 10; ow,4'f!d  
%cPz>PTW@  
/* !i"Z  
* (non-Javadoc) hqPpRSv'  
* #5Zf6w  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jl,mYFEZ  
*/ vZ<@m2  
public void sort(int[] data) { Obd};&6Q  
int[] temp=new int[data.length]; b[mAkm?9+1  
mergeSort(data,temp,0,data.length-1); ZO^Y9\L  
} xlJ8n+  
\|OW`7Q)k  
private void mergeSort(int[] data, int[] temp, int l, int r) { y)5U*\b  
int i, j, k; f,e7;u z%  
int mid = (l + r) / 2; S6J7^'h  
if (l == r) z j[/~ I  
return; kX\\t.nH  
if ((mid - l) >= THRESHOLD) jl!rCOLt4  
mergeSort(data, temp, l, mid); @D<KG  
else e-}b]\  
insertSort(data, l, mid - l + 1); "cK@Yo  
if ((r - mid) > THRESHOLD) %Q)3*L  
mergeSort(data, temp, mid + 1, r); 9}\{0;9  
else 9`3%o9V9Y  
insertSort(data, mid + 1, r - mid); n'dxa<F2|  
[CCj5N1/  
for (i = l; i <= mid; i++) { ^t|CD|,K_O  
temp = data; *2$I, ~(P  
} <($'jlZ  
for (j = 1; j <= r - mid; j++) { Pf?*bI  
temp[r - j + 1] = data[j + mid]; ,gvv297  
} C2 ~t  
int a = temp[l]; 6NvdFss'A{  
int b = temp[r]; p4ML } q8  
for (i = l, j = r, k = l; k <= r; k++) { hx'p0HDta  
if (a < b) { @M:Uf7  
data[k] = temp[i++]; uk8vecj  
a = temp; \~3g*V  
} else { jz\LI  
data[k] = temp[j--]; yNw YP%"y  
b = temp[j]; #i#4h<R  
} @0XqUcV  
} k"J [mT$b  
} qre.^6x  
=bVaB<!  
/** DOr()X  
* @param data '+!@c&d#%o  
* @param l ]yTMWIx#  
* @param i "IK QFt'  
*/ q#8$@*I  
private void insertSort(int[] data, int start, int len) { H*l2,0&W  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9M$=X-  
} "y%S.ipWG  
} 5#v  
} /uTU*Oe  
} B&tU~  
fgb%SIi?  
堆排序: ~"<AYJlO  
pH?tr  
package org.rut.util.algorithm.support; {V> >a  
rv(Qz|K@  
import org.rut.util.algorithm.SortUtil; /Dn,;@ZwAi  
U%swqle4  
/** HzW`j"\  
* @author treeroot f}4bnu3  
* @since 2006-2-2 KUr}?sdz  
* @version 1.0 8=]R6[,fD  
*/ :r<uH6x|  
public class HeapSort implements SortUtil.Sort{ zi^T?<t  
M_o<6C  
/* (non-Javadoc) $oefG}h2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9~6FWBt  
*/ ^Fy{Q*p`(  
public void sort(int[] data) { Qx9lcO_  
MaxHeap h=new MaxHeap(); a0vg%Z@!  
h.init(data); t@a2@dX|  
for(int i=0;i h.remove(); V b=Oz  
System.arraycopy(h.queue,1,data,0,data.length); YS}uJ&WoF  
} QzjLKjl7p4  
JN{.-k4Ha  
private static class MaxHeap{ g$++\%k&  
i+ I%]  
void init(int[] data){ LuM[*_8  
this.queue=new int[data.length+1]; r ek89.p  
for(int i=0;i queue[++size]=data; CM; r\,o  
fixUp(size); G0Q8"]  
} ]Zfg~K(  
} REyk,s2"6  
@O;gKFx  
private int size=0; {X=gjQ9  
qO yg&]7  
private int[] queue; P= e3f(M2  
QEl:>HG  
public int get() { IF<?TYy=3B  
return queue[1]; D[.;-4"_  
} >x(3p@6p  
+V"t't7  
public void remove() { 8vhg{L..  
SortUtil.swap(queue,1,size--); ";jj`  
fixDown(1); \r_-gn'1b  
} 82w='~y  
file://fixdown 99'e)[\  
private void fixDown(int k) { 29]T:I1d[  
int j; H /E.R[\+x  
while ((j = k << 1) <= size) { F`l r5  
if (j < size %26amp;%26amp; queue[j] j++; F,Ls1  
if (queue[k]>queue[j]) file://不用交换 n'<FH<x  
break; vT*z3  
SortUtil.swap(queue,j,k); MuzlUW]  
k = j; [m>kOv6>^  
} l]BIFZ~  
} ]!yuD/4A  
private void fixUp(int k) { 6 ufF34tA  
while (k > 1) { ?8cgQf$  
int j = k >> 1; {uO=Wkp~7  
if (queue[j]>queue[k]) s~ZLnEb  
break; 7J ~usF>A  
SortUtil.swap(queue,j,k); MHs2UN  
k = j; M.|@|If4?  
} ?Y:>Ouv*z'  
} 3},0b8};  
;\P\0pI50  
} $wL zaZL|  
>t-9yO1XQq  
} {> T r22S  
J2X;=X5  
SortUtil: LKCj@NdV  
6,nws5dh  
package org.rut.util.algorithm; {rQ SB;3  
n H)6mOYp  
import org.rut.util.algorithm.support.BubbleSort; <cQ)*~hN  
import org.rut.util.algorithm.support.HeapSort; L&[uE;ro  
import org.rut.util.algorithm.support.ImprovedMergeSort; Fa}3UVm  
import org.rut.util.algorithm.support.ImprovedQuickSort; M2UF3xD   
import org.rut.util.algorithm.support.InsertSort; jf_xm=n  
import org.rut.util.algorithm.support.MergeSort; d5/x2!mH8  
import org.rut.util.algorithm.support.QuickSort; dQD YN_  
import org.rut.util.algorithm.support.SelectionSort; _K(w &Kr  
import org.rut.util.algorithm.support.ShellSort; 7Y`/w$  
|7$F r[2d  
/** )<_e{_ h  
* @author treeroot '&?OhSeN  
* @since 2006-2-2 D%L}vugxK  
* @version 1.0 *v+xKy#M  
*/ lTl-<E;  
public class SortUtil { tI2V)i!  
public final static int INSERT = 1; 7 &y'\  
public final static int BUBBLE = 2; D6cqON0a.  
public final static int SELECTION = 3; 3lw KV  
public final static int SHELL = 4; oBfh1/< <a  
public final static int QUICK = 5; "bI'XaSv  
public final static int IMPROVED_QUICK = 6; )%8 ;C]G;  
public final static int MERGE = 7; c{YBCWA  
public final static int IMPROVED_MERGE = 8; aRPpDSR?l  
public final static int HEAP = 9; 2Zf} t  
G}!dm0s$  
public static void sort(int[] data) { ~Z74e>V%  
sort(data, IMPROVED_QUICK); _J'V5]=4  
} :~K c"Pg  
private static String[] name={ } 0su[gy[  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IYeX\)Gv&  
}; )f#raXa5+  
blbL49;  
private static Sort[] impl=new Sort[]{ [PVem  
new InsertSort(), AfU~k!4`  
new BubbleSort(), WCK;r{p%I  
new SelectionSort(), FW](GWp`:  
new ShellSort(), S8 +GM  
new QuickSort(), e^;<T9Esr  
new ImprovedQuickSort(), L9,;zkgo  
new MergeSort(), 0L3v[%_j"  
new ImprovedMergeSort(), IM""s]  
new HeapSort() P ?- #d\qi  
}; xq#YBi,  
du,mbTQib  
public static String toString(int algorithm){ [sxJ<  
return name[algorithm-1]; ,,U8X [A  
}  58S>B'  
{bQi z  
public static void sort(int[] data, int algorithm) { xa7~{ E,  
impl[algorithm-1].sort(data); z?ck*9SZX  
} d D%Sbb  
PtfxF]%H  
public static interface Sort { [^oTC;  
public void sort(int[] data); xqP DL9\  
} r&$r=f<  
J.nJ@?O+  
public static void swap(int[] data, int i, int j) { *{_WM}G  
int temp = data; QqpXUyHp[  
data = data[j]; F]_w~1 n5  
data[j] = temp; :Z(w,  
} oqLM-=0<}  
} eouxNw}F1  
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