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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。 yO; r]`j0  
插入排序: z:{'IY  
6-c3v  
package org.rut.util.algorithm.support; w$MFCJ:p&  
4p\<b8(9>  
import org.rut.util.algorithm.SortUtil; uQ=p } w  
/** dgh )Rfp3  
* @author treeroot y1GVno  
* @since 2006-2-2 TL-sxED,,D  
* @version 1.0 (sHqzWh  
*/ y0k*iS e  
public class InsertSort implements SortUtil.Sort{ )7l+\t  
XCc /\  
/* (non-Javadoc) jeXv)}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K[!OfP  
*/ SV0E7qX  
public void sort(int[] data) { 71_{FL8  
int temp; !o1{. V9q  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); =UE/GTbl  
}  G?AZ%Yx  
} ze@NqCF  
} (A|Gb2X  
@KfFt R-;  
} D~E1hr&Vd>  
a|Io)Qhr  
冒泡排序: eK PxSN Z  
z-$bce9*  
package org.rut.util.algorithm.support; XkLl(uyh  
+P:xB0Tm D  
import org.rut.util.algorithm.SortUtil; ?-1r$z  
,5$V;|  
/** {/#^v?,  
* @author treeroot 9JYrP6I!_  
* @since 2006-2-2 [@fw9@_'  
* @version 1.0 ,:Qy%k}f  
*/ Fa:fBs{  
public class BubbleSort implements SortUtil.Sort{ (99P9\[p  
|\;oFuCv##  
/* (non-Javadoc) +[C dd{2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v]SHude{  
*/ A{3Aw|;  
public void sort(int[] data) { WDQtj$e+  
int temp; #RT}-H  
for(int i=0;i for(int j=data.length-1;j>i;j--){ {|nm0vg`A  
if(data[j] SortUtil.swap(data,j,j-1); ^}7iouE C  
} 5 #3/  
} ARvT  
} Ysbd4 rN  
} $fES06%  
F9@,T8I  
} &.J8O+  
INtt0Cm9"  
选择排序: cVya~ *  
*y<Ru:D  
package org.rut.util.algorithm.support; __o`+^FS  
]wFKXZeK  
import org.rut.util.algorithm.SortUtil; H'7AIY }  
|W4 \  
/** hqrI%%  
* @author treeroot Ww-%s9N<  
* @since 2006-2-2 9c9F C  
* @version 1.0 BNns#Q8a  
*/ =%P'?(o|  
public class SelectionSort implements SortUtil.Sort { GO0Spf_Gh  
AT Dm$ *  
/* U  ?'$E\  
* (non-Javadoc) E`s9SE  
* 3jR,lEJyj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {,EOSta  
*/ :?W {vV  
public void sort(int[] data) { OjO$.ecT  
int temp; jyQ Bx  
for (int i = 0; i < data.length; i++) { ;Yo9e~  
int lowIndex = i; wgfy; #  
for (int j = data.length - 1; j > i; j--) { 2r;^OWwr?  
if (data[j] < data[lowIndex]) { 1&N|k;#QS  
lowIndex = j; :&: IZkO  
} &* GwA  
} {];4  
SortUtil.swap(data,i,lowIndex); oz $T.  
} juOOD   
} 0s)B~  
i\hH .7G1  
} f[v~U<\R  
*AX)QKQ@  
Shell排序: uMOm<kn  
%SORs(4  
package org.rut.util.algorithm.support; 7 +A-S9P)  
)P4#P2  
import org.rut.util.algorithm.SortUtil; Vfew )]I  
@gzm4  
/** 3l5rUjRwj  
* @author treeroot #;cDPBv*wS  
* @since 2006-2-2 KQ'fp:5|/@  
* @version 1.0 jCdKau&9  
*/ HRS|VC$tz  
public class ShellSort implements SortUtil.Sort{ SjgF&LD  
\%\b* OO  
/* (non-Javadoc) 4 4%jz-m  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k#"Pv"  
*/ Ij; =  
public void sort(int[] data) { V"":_`1VW  
for(int i=data.length/2;i>2;i/=2){ V# Mw  
for(int j=0;j insertSort(data,j,i); [P#^nyOh(  
} Q)N$h07R  
} N!" ]e*q  
insertSort(data,0,1); :()(P9?  
} pcw!e_"+  
86d *  
/** | rJ_  
* @param data %4QCUc*lr  
* @param j dLOUL9hf  
* @param i N{Og; roGD  
*/ xR+=F1y  
private void insertSort(int[] data, int start, int inc) { f:iK5g  
int temp; Ht^MY  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); =w &%29BYq  
} [{3WHS.  
} <()xO(  
} $s2Ty1  
etF?,^)h=g  
} VuTH"br6  
K@xp!  
快速排序: m(JFlO  
6S?a57;&W  
package org.rut.util.algorithm.support; Yh/-6wg  
H8 yc<  
import org.rut.util.algorithm.SortUtil; oiAU}iK:  
kf~71G+  
/** lh`inAt)"  
* @author treeroot :@g@jcbYq`  
* @since 2006-2-2 #$V`%2>  
* @version 1.0 =QEg~sD^)s  
*/ rC]jz$sle  
public class QuickSort implements SortUtil.Sort{ ]*a)'k_@[  
sQW$P9s c  
/* (non-Javadoc) &H\$O.?f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [o&Vr\.$  
*/ Db({k,P'Y  
public void sort(int[] data) { GEP YSp  
quickSort(data,0,data.length-1); 'N,3]Soi  
} 2L.UEAt  
private void quickSort(int[] data,int i,int j){ Q6?+#}  
int pivotIndex=(i+j)/2; g#FqjE|mx  
file://swap uF5d ]{Qt  
SortUtil.swap(data,pivotIndex,j); EK. L>3  
}]sI?&xB  
int k=partition(data,i-1,j,data[j]); ><iEVrpN  
SortUtil.swap(data,k,j); UNocm0!N'  
if((k-i)>1) quickSort(data,i,k-1); DoWY*2E  
if((j-k)>1) quickSort(data,k+1,j); bTC2Ya  
)>a t]mH  
} BXueOvO8  
/** A`u04Lm7  
* @param data v}dt**l  
* @param i o*/\ oVOq  
* @param j l ,)l"6OV  
* @return g92M\5 x9  
*/ wbI(o4rXE  
private int partition(int[] data, int l, int r,int pivot) { &:L8; m  
do{ P,AS`=z  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 9\TvX!)h  
SortUtil.swap(data,l,r); LXIlrZ9D5  
} XboOvdt^|  
while(l SortUtil.swap(data,l,r); `<y[V  
return l; o)n8,k&nm  
} "Ks%!  
!Dkz6B*  
} mh44  
d%9I*Qo0,  
改进后的快速排序: n);2b\&  
S|;a=K&hS  
package org.rut.util.algorithm.support; _5M!ec  
)?'sw5C  
import org.rut.util.algorithm.SortUtil; ,)V*xpp  
+`f gn9p  
/** tZ>>aiI3  
* @author treeroot DLyHC=%{+h  
* @since 2006-2-2 @&+h3dV.V  
* @version 1.0 ?t)y/@eG  
*/ x=1G|<z%  
public class ImprovedQuickSort implements SortUtil.Sort { 8+a/x#b-  
4q@o4C<0  
private static int MAX_STACK_SIZE=4096; b7v] g]*  
private static int THRESHOLD=10; wd*T"V3  
/* (non-Javadoc) F-k1yZ?^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8!>uC&bE8  
*/ DS>s_3V  
public void sort(int[] data) { M; zRf3S  
int[] stack=new int[MAX_STACK_SIZE]; eHv~?b5l  
bXq,iX  
int top=-1; 2 T{PIJg3  
int pivot; \, n'D  
int pivotIndex,l,r; (#c5Q&  
_'n;rZ+  
stack[++top]=0; !QVd'e  
stack[++top]=data.length-1; R ;5w*e}?5  
i BJ*6orz  
while(top>0){ *sJx0<!M}  
int j=stack[top--]; F&lc8  
int i=stack[top--]; #2yOqUO\  
nIph[Vs-Z  
pivotIndex=(i+j)/2; r_)-NOp  
pivot=data[pivotIndex]; z('93vsO  
nS?HH6H  
SortUtil.swap(data,pivotIndex,j); ?RWd"JTGue  
uNXh"?  
file://partition +6<MK;  
l=i-1; LDV{#5J  
r=j; \07Vh6cj  
do{ }J`{g/  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 2l5@gDk5  
SortUtil.swap(data,l,r); (~Zg\(5#  
} EUuMSDp  
while(l SortUtil.swap(data,l,r); '4Z%{.;  
SortUtil.swap(data,l,j); f+xGf6V  
e@]cI/j  
if((l-i)>THRESHOLD){ .e.vh:Sz  
stack[++top]=i; ~ezCE4^&  
stack[++top]=l-1; -<z'f){gb  
} " "a+Nc  
if((j-l)>THRESHOLD){ D{BH~IM  
stack[++top]=l+1; :Yz.Bfli  
stack[++top]=j; }T,E$vsx  
} D4#,9?us  
&KR@2~vE  
} t 1C{  
file://new InsertSort().sort(data); 1b|<   
insertSort(data); #s yP=  
} HqYaQ~Dth  
/** y_$^Po  
* @param data L6 _Sc-sU  
*/ w4L\@y 3  
private void insertSort(int[] data) { ^;@Bz~Z  
int temp; '3hvR4P  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); :+Dn]:\  
} KAsS= `  
} KMbBow3o*~  
} GUN<ZOYb=  
*"zE,Bp"  
}  iI ^{OD  
(/*-M]>  
归并排序: _4E+7+  
t&r?O dc&m  
package org.rut.util.algorithm.support; |um)vlN;9  
vN4X%^:(  
import org.rut.util.algorithm.SortUtil; 7gQt k  
r1?LKoJOn  
/** A{+ZXu}  
* @author treeroot -;~_]t^a  
* @since 2006-2-2 #='#`5_5  
* @version 1.0 pu>LC6m3a  
*/ R*&3i$S  
public class MergeSort implements SortUtil.Sort{ H`io|~Q  
UT{N ly8u  
/* (non-Javadoc) HPCA,*YR`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _v $mGZpGY  
*/ W\KZFrV@  
public void sort(int[] data) { @ics  
int[] temp=new int[data.length]; I" j7  
mergeSort(data,temp,0,data.length-1); A,=l9hE'  
} wK\SeX  
3QR-8  
private void mergeSort(int[] data,int[] temp,int l,int r){ 3K0J6/mc  
int mid=(l+r)/2; fV5#k@,")  
if(l==r) return ; 15s?QSKj  
mergeSort(data,temp,l,mid); 1gm{.*G  
mergeSort(data,temp,mid+1,r); V&}Z# 9Dx  
for(int i=l;i<=r;i++){ X@D3  
temp=data;  E;|\?>  
} 5 + Jy  
int i1=l; Sv>aZ  
int i2=mid+1; x)Th2es\  
for(int cur=l;cur<=r;cur++){ @%fkW"y:  
if(i1==mid+1) <'vM+Lk  
data[cur]=temp[i2++]; CNN?8/u!@  
else if(i2>r) >C&!# 3  
data[cur]=temp[i1++]; eb8_guZ  
else if(temp[i1] data[cur]=temp[i1++]; 6R,;c7Izhd  
else :- 5Mn3*  
data[cur]=temp[i2++]; d8r+UP@#  
} \Q)~'P3  
} /kWWwy<  
< 1r.p<s  
} LaIif_fie^  
){(cRB$  
改进后的归并排序: Ud9\;Qse  
]E3g8?L  
package org.rut.util.algorithm.support; AP~!YwLW  
\C6m.%%={R  
import org.rut.util.algorithm.SortUtil; #nxx\,i>  
F3f>pK5  
/** Bh.'%[',  
* @author treeroot 'qD9k J`  
* @since 2006-2-2 He@= bLLa  
* @version 1.0 ZEMo`O  
*/ ?@,:\ ,G  
public class ImprovedMergeSort implements SortUtil.Sort { z&:[.B   
l00D|W_ 9  
private static final int THRESHOLD = 10; lGz0K5P{  
XDWERv Ij  
/* $R5-JvJJH  
* (non-Javadoc) ~iSW^mi  
* axl?t|~I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "LWp/  
*/ ?=G H{ %E  
public void sort(int[] data) { [/kO >  
int[] temp=new int[data.length]; 3_>1j  
mergeSort(data,temp,0,data.length-1); 7/yd@#$X  
} lu}[XN  
I"!{HnSG`  
private void mergeSort(int[] data, int[] temp, int l, int r) { :({<"H)!'  
int i, j, k; 4CCux4)N  
int mid = (l + r) / 2; 0k>&MkM\^  
if (l == r) 6]3 ZUH;  
return; W | }Hl{}  
if ((mid - l) >= THRESHOLD) 7wnzef?)  
mergeSort(data, temp, l, mid); Ij8tBT?jlL  
else {+EPE2X=C  
insertSort(data, l, mid - l + 1); 93dotuF  
if ((r - mid) > THRESHOLD) S .jjB  
mergeSort(data, temp, mid + 1, r); !< )_ F  
else vP2QAGk <  
insertSort(data, mid + 1, r - mid); SrtmpQ  
vOS0E^  
for (i = l; i <= mid; i++) { }X?*o `sW  
temp = data; WWL Vy(  
} _7<U[63  
for (j = 1; j <= r - mid; j++) { :6 fQE#(s&  
temp[r - j + 1] = data[j + mid]; QUDVsN#  
} Ss:,#|   
int a = temp[l]; +g[B &A!d+  
int b = temp[r]; K_aN7?#.v`  
for (i = l, j = r, k = l; k <= r; k++) { ._3NqE;  
if (a < b) { .R'i=D`Pz  
data[k] = temp[i++]; i=D,T[|>a  
a = temp; ^&.?kJM  
} else { LA+MX 0*  
data[k] = temp[j--]; v3"xJN_,[p  
b = temp[j]; $Da^z[8e  
} ?X1#b2s  
} iQF}x&a<  
} ~}AP@t*  
{;E/l(HNI  
/** (?!0__NN;  
* @param data E-D5iiF  
* @param l Uk9g^\H<D  
* @param i GP$ Y4*y/  
*/ >N J$ac  
private void insertSort(int[] data, int start, int len) { Wd AGZUp  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SS~Q;9o  
} $%JyM  
} t["Df;"O  
} ^IH1@  
} qrc/Q;$  
VZoOdR:d  
堆排序: }v,THj  
bEKLameKv  
package org.rut.util.algorithm.support; DO1{r/Ib.{  
Oy&'zigJ  
import org.rut.util.algorithm.SortUtil; q#`^EqtUF  
f zO8by  
/** }D+8K  
* @author treeroot zf~zYZSr  
* @since 2006-2-2 t] wM_]+  
* @version 1.0 m-RY{DO+  
*/ Ji[g@#  
public class HeapSort implements SortUtil.Sort{ g-FZel   
hhGpB$A  
/* (non-Javadoc) %b;+/s2W  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j!\0Fyr  
*/ u2]g1XjeG  
public void sort(int[] data) { #:|?t&On  
MaxHeap h=new MaxHeap(); JZzf,G:  
h.init(data); hH}/v0_jb  
for(int i=0;i h.remove(); e9_+$Oo  
System.arraycopy(h.queue,1,data,0,data.length); 6sl<Z=E#  
} VWy:U#;+8  
lg >AWTW[  
private static class MaxHeap{ lM*O+k  
2H[a Y%1T  
void init(int[] data){ =7fh1XnW  
this.queue=new int[data.length+1]; "ru1;I  
for(int i=0;i queue[++size]=data; (N|xDl &;  
fixUp(size); &o@5%Rz2/  
} ]4mj 1g&C  
} PAV2w_X~  
~iZF~PQ1_  
private int size=0; HDyZzjgG  
\STvBI?  
private int[] queue; Qu FCc1Q  
X.l"f'`l  
public int get() { [!? ,TGM}^  
return queue[1]; -/c1qLdQ  
} j#P4Le[t  
tcEf ~|3  
public void remove() { lO> 7`2x=F  
SortUtil.swap(queue,1,size--); HF+fk*_Q  
fixDown(1); ' u};z:t  
} sDm},=X}  
file://fixdown y%bqeo L~  
private void fixDown(int k) { Os 2YZ<t  
int j; \BaN5+ B6  
while ((j = k << 1) <= size) { ' ,`4 U F  
if (j < size %26amp;%26amp; queue[j] j++; J7;n;Mx  
if (queue[k]>queue[j]) file://不用交换 V C'-h~  
break; !a(qqZ|s  
SortUtil.swap(queue,j,k); ( L\G!pP.  
k = j; <S@mQJS!y  
} ' 5 qL  
} )^S^s >3  
private void fixUp(int k) { Z?c=t-yqp  
while (k > 1) { 8sF0]J[g{  
int j = k >> 1; `Mn{bd  
if (queue[j]>queue[k]) h;UdwmT  
break; a~>0JmM+N  
SortUtil.swap(queue,j,k); iH}rI'U.  
k = j; nQ!#G(_nO  
} , gr&s+  
} OGi4m |  
eKpxskbhZ  
} _<F@(M5  
TgE.=`"7  
} f9XO9N,hE:  
:G=1$gb  
SortUtil: rn[}{1I33Q  
1\J1yOL  
package org.rut.util.algorithm; }:l%,DBw  
5YG@[ic  
import org.rut.util.algorithm.support.BubbleSort; K<  
import org.rut.util.algorithm.support.HeapSort; _B7?C:8Q-  
import org.rut.util.algorithm.support.ImprovedMergeSort; YSz$` 7i  
import org.rut.util.algorithm.support.ImprovedQuickSort; ?CW^*So  
import org.rut.util.algorithm.support.InsertSort; P}WhE  
import org.rut.util.algorithm.support.MergeSort; *o\Y~U-so  
import org.rut.util.algorithm.support.QuickSort; u:H 3.5)%  
import org.rut.util.algorithm.support.SelectionSort; }V#9tWW  
import org.rut.util.algorithm.support.ShellSort; h:Mn$VR,  
p C2c(4  
/** lyH X#]  
* @author treeroot )tI2?YIR  
* @since 2006-2-2 JvWs/AG1  
* @version 1.0 {S"  
*/ 2\CkX  
public class SortUtil { q'AnI$!  
public final static int INSERT = 1; F;&f x(  
public final static int BUBBLE = 2; A"<)(M+kG  
public final static int SELECTION = 3; ^%8Hvy  
public final static int SHELL = 4; {p*hNi)0  
public final static int QUICK = 5; -f;j1bQ  
public final static int IMPROVED_QUICK = 6; O$umu_  
public final static int MERGE = 7; i_'R"ob{S  
public final static int IMPROVED_MERGE = 8; c>WpOZ,  
public final static int HEAP = 9; UFIAgNKl  
Up/u|A$0V  
public static void sort(int[] data) { :*&9TNU E@  
sort(data, IMPROVED_QUICK); voej ~z+  
} )4F/T,{;m  
private static String[] name={ 7~l  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #9hXZr/8  
}; 5IE+M  
+?5Uy*$  
private static Sort[] impl=new Sort[]{ HHIUl,P  
new InsertSort(), kSDa\l!W]  
new BubbleSort(), &(uF&-PwO4  
new SelectionSort(), WP@JrnxO\`  
new ShellSort(), w{zJE]7  
new QuickSort(), " ,aT<lw.  
new ImprovedQuickSort(), pW3)Y5/D  
new MergeSort(), \l=KWa3Q  
new ImprovedMergeSort(), AR+\uD=\I-  
new HeapSort() 2 ) /k`Na  
}; ;/)Mcx]n  
& L.PU@  
public static String toString(int algorithm){ ?;r8SowZ7  
return name[algorithm-1]; +%le/Pg@  
} rPo\Dz  
/VmCN]2AZ  
public static void sort(int[] data, int algorithm) { |<$<L`xoe  
impl[algorithm-1].sort(data); gM;)  
} `3sy>GU?  
@^:7UI_  
public static interface Sort { j_6`s!Yw  
public void sort(int[] data); LE0J ;|1  
} k qY3r &  
XEUa  
public static void swap(int[] data, int i, int j) { z"s%#/#  
int temp = data; mS)|6=Y  
data = data[j]; J^g,jBk  
data[j] = temp; 0,~6TV<K  
} GOZQ5m -  
} q(jkit~`A  
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