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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。 |<t"O  
插入排序: y'(l]F1]  
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package org.rut.util.algorithm.support; " qY Pi  
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import org.rut.util.algorithm.SortUtil; Py3Xvudv  
/** A]id*RtY  
* @author treeroot : " 9F.U  
* @since 2006-2-2 ]L@VpHEj  
* @version 1.0 s_}T -%\  
*/ ,|,DXw  
public class InsertSort implements SortUtil.Sort{ uW3`gwwlU  
V\^3I7F  
/* (non-Javadoc) yCy4t6`e  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,A T!:&<X  
*/ -{dsl|Dl  
public void sort(int[] data) { `9}\kn-</8  
int temp; - &Aw] +  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); wws)**]J8  
} &`[y]E'  
} </ 3 Shq  
} ]([:"j  
d h#4/Wa,  
} rLw3\>y  
8M9 &CsT6  
冒泡排序: j'Z}; 3y  
eLXG _Qb"  
package org.rut.util.algorithm.support; H|T!}M>  
 I0trHrX9  
import org.rut.util.algorithm.SortUtil; @-|{qP=Dy  
+YVnA?r?  
/** lS&$86Jo(  
* @author treeroot 0*o)k6?q3  
* @since 2006-2-2 2iYf)MC  
* @version 1.0 gs wp:82e2  
*/ tkx1iBW=  
public class BubbleSort implements SortUtil.Sort{ ;3wj(o0  
 P#m/b<  
/* (non-Javadoc) # Y/ .%ch.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f<bc8Lp  
*/ &rj3UF@hb  
public void sort(int[] data) { }YH@T]O}  
int temp; l=G=J(G  
for(int i=0;i for(int j=data.length-1;j>i;j--){ !_P;4E  
if(data[j] SortUtil.swap(data,j,j-1); ?9 hw]Q6r}  
} 1:%HE*r  
} uKHkC.g  
} GP6-5Y"8  
} E~Eh'>Y(B  
+Bk" khH  
} -h+=^,  
O) NEt  
选择排序: eJFGgJRIvF  
ij i<+oul  
package org.rut.util.algorithm.support; (jv!q@@2C.  
'~Uo+<v$w  
import org.rut.util.algorithm.SortUtil; 3)ac  
N% /if  
/** *vqlY[2Ax  
* @author treeroot m2{3j[  
* @since 2006-2-2 i j&_>   
* @version 1.0 @|kBc.(]  
*/ '# K:e  
public class SelectionSort implements SortUtil.Sort { o%_MTCANy  
eq +t%  
/* 1~/?W^ir  
* (non-Javadoc) vcTWe$;Q  
* q y"VrR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sp8Xka~5*#  
*/ oxT..=-  
public void sort(int[] data) { k9H7(nS{  
int temp; O]rAo  
for (int i = 0; i < data.length; i++) { #n&/yYl9(l  
int lowIndex = i; 6z3 Yq{1  
for (int j = data.length - 1; j > i; j--) { | d}f\a`  
if (data[j] < data[lowIndex]) { dXR 70/  
lowIndex = j; GjlA\R^e  
} P[{qp8(g  
} }? j>V  
SortUtil.swap(data,i,lowIndex); aN9#ATE  
} )f(.{M  
} wG6@. ;3  
?0k(wiF  
} DrE +{Spm  
<j"}EEb^  
Shell排序: m:|jv|f  
ue8Cpn^M  
package org.rut.util.algorithm.support; z*?-*6W  
z<2!|  
import org.rut.util.algorithm.SortUtil; t}r`~AEa!  
.XD7};g  
/** d3Dw[4  
* @author treeroot ~xI1@^ r  
* @since 2006-2-2 M =Pn8<h~  
* @version 1.0 \z"0lAv"  
*/ 8`Wj 1 ,q  
public class ShellSort implements SortUtil.Sort{ V?"X0>]0  
b=[gK|fu  
/* (non-Javadoc) `;Qw/xl_N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bc%A aZ0x  
*/ e45gjjts  
public void sort(int[] data) { X :2%U  
for(int i=data.length/2;i>2;i/=2){ "[(&$ I  
for(int j=0;j insertSort(data,j,i); py#`  
} jM`)N d  
} P&PPX#%  
insertSort(data,0,1); ]C.x8(2!f  
} :EOx>Pf_9)  
~<b/%l>h1  
/** O 1T JJ8  
* @param data D4 {?f<G0F  
* @param j "JI FF_  
* @param i 5)X;q-  
*/ ZI"L\q=|0#  
private void insertSort(int[] data, int start, int inc) {  !]]QbB  
int temp; S |SN3)  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); IHqY/j  
} +-_71rJc.  
} -"J6 |Y#8  
} {z)&=v@  
u{Jv6K,  
} /7WN,a  
56 6vjE  
快速排序: yKE[,"  
,>"rcd  
package org.rut.util.algorithm.support; CNwYQe-i  
'u@_4wWp  
import org.rut.util.algorithm.SortUtil; 5Z2E))UU  
c2M-/ x-:  
/** Ki#({~  
* @author treeroot Hg8n`a;R  
* @since 2006-2-2 F O"8B  
* @version 1.0 3V")~ m  
*/ fQ>=\*b9x^  
public class QuickSort implements SortUtil.Sort{ m)G=4kK52-  
RQ?T~ASs  
/* (non-Javadoc) /18Z4TA  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]y&w)-0  
*/ aoNTRJ c$  
public void sort(int[] data) { I5RV:e5b  
quickSort(data,0,data.length-1); 9o-fI@9  
} !'uLV#YEZ  
private void quickSort(int[] data,int i,int j){ >r Nff!Ow  
int pivotIndex=(i+j)/2; ^X2U A{  
file://swap u{%gB&nC  
SortUtil.swap(data,pivotIndex,j); Fv!zS.)`  
/8!s C D  
int k=partition(data,i-1,j,data[j]); 5#jna9Xc  
SortUtil.swap(data,k,j); HN'r ZAZ(  
if((k-i)>1) quickSort(data,i,k-1); M6(oJ*  
if((j-k)>1) quickSort(data,k+1,j); +uR|0Jo8X  
Z4S0{:XY  
} eIVCg-l}  
/** X8!=Xjl)  
* @param data Z2z"K<Z W  
* @param i 7%rSo^t,L  
* @param j /Mq]WXq[V  
* @return D>& ;K{!  
*/ -fF1vJ7L  
private int partition(int[] data, int l, int r,int pivot) { [~&C6pR  
do{ npcB+6  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); xEK+NKTeV  
SortUtil.swap(data,l,r);  & t b  
} /<Nb/#8  
while(l SortUtil.swap(data,l,r); m5K B#\  
return l; +R7";.  
} &{B-a  
iG<rB-"  
} .H1 kl)~V  
nnBgTtsC]  
改进后的快速排序: V\axOz!  
.E !p  
package org.rut.util.algorithm.support;  ESOuDD2<  
<0[{Tn  
import org.rut.util.algorithm.SortUtil; <:#O*Y{  
n^QOGT.s6`  
/** bDdJh}Vz  
* @author treeroot >`rK=?12<  
* @since 2006-2-2 }qUNXE@  
* @version 1.0 XOl]s?6H$  
*/ ; n2|pC^  
public class ImprovedQuickSort implements SortUtil.Sort { z1\G,mJK  
Mwdh]I,#  
private static int MAX_STACK_SIZE=4096; .K![<e Z  
private static int THRESHOLD=10; i4T U}.h8  
/* (non-Javadoc) \'( @{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $@_7HE3  
*/ 4}{S8fGk%  
public void sort(int[] data) { JL~QE-pvD  
int[] stack=new int[MAX_STACK_SIZE]; b`Wn98s  
z-G|EAON"/  
int top=-1; x}TDb0V  
int pivot; jE)&`yZ5  
int pivotIndex,l,r; $cO"1mu  
aubmA0 w  
stack[++top]=0; DbSl}N;  
stack[++top]=data.length-1; k*bfq?E a  
G~ZDXQ>5CP  
while(top>0){ V43pZ]YZ>  
int j=stack[top--]; H) g:<  
int i=stack[top--]; VQHJ O I  
Vv(!Ki}  
pivotIndex=(i+j)/2; s{q)m@  
pivot=data[pivotIndex]; Z<a6U 3  
4)=LOGW  
SortUtil.swap(data,pivotIndex,j); =J.)xDx*  
oRM EC7!A0  
file://partition qB3{65  
l=i-1; fFXG;Q8&  
r=j; G'XlsyaWrb  
do{ bw#zMU^E  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); STgl{#  
SortUtil.swap(data,l,r); <i'4EnO  
} *(ex:1sW  
while(l SortUtil.swap(data,l,r); qE6:`f  
SortUtil.swap(data,l,j); ie$QKoE  
:W5*fE(i  
if((l-i)>THRESHOLD){ kr7f<;rmJ  
stack[++top]=i; b?-%Uzp<  
stack[++top]=l-1; 5YIi O7@4  
} +MC>?rr_u  
if((j-l)>THRESHOLD){ K5(?6hr;  
stack[++top]=l+1; Ah)OyO6  
stack[++top]=j; *iF>}yhe  
} W|=?-  
-tT{h 4  
} ,=l MtW  
file://new InsertSort().sort(data); /vPh_1  
insertSort(data); rtDm<aUh  
} '<f4POy!  
/**  TyMR m  
* @param data ?8Cxt|o>  
*/ ]}9cOb%I  
private void insertSort(int[] data) { );$Uf!v4  
int temp; '{kNXCnZ  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ]+[ NX)=  
} 0CY_nn#3  
} "ffwh  
} E66e4?"  
P,!W\N%3  
} ?/"@WP9  
'j$iSW&  
归并排序: io cr  
h 88iZK  
package org.rut.util.algorithm.support; f(DGC2R <  
A <iF37.  
import org.rut.util.algorithm.SortUtil; V_U$JKJ1=  
q /|<>s  
/** yY*OAC  
* @author treeroot 4UoUuKzt  
* @since 2006-2-2 pRXA!QfO  
* @version 1.0 W<;i~W  
*/ V~5vVY_HG&  
public class MergeSort implements SortUtil.Sort{ ))!Z2PfD  
/woa[7Xe  
/* (non-Javadoc) \~xsBPX+x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >8SX,  
*/ Z!6\KV]  
public void sort(int[] data) { }"fP,:n"KN  
int[] temp=new int[data.length]; 8_f0P8R!y  
mergeSort(data,temp,0,data.length-1); df#DKV:  
} pw:<a2.  
` e~/  
private void mergeSort(int[] data,int[] temp,int l,int r){ 2Iz@lrO6  
int mid=(l+r)/2; T~Jl{(s9)  
if(l==r) return ; `a:@[0r0U  
mergeSort(data,temp,l,mid); 2U>1-p&dn  
mergeSort(data,temp,mid+1,r); iUA2/ A  
for(int i=l;i<=r;i++){ -9-%_=6  
temp=data; /'E+(Y&:J  
} $$ {ebt  
int i1=l; c@ En4[a'  
int i2=mid+1; * ok89 ad  
for(int cur=l;cur<=r;cur++){ O<f_-n@G|  
if(i1==mid+1) JU<<,0  
data[cur]=temp[i2++]; sx8mba(  
else if(i2>r) fJOU1%  
data[cur]=temp[i1++]; '. atbl  
else if(temp[i1] data[cur]=temp[i1++]; m*P~X*St  
else 9R>A,x(  
data[cur]=temp[i2++]; :<ujk  
} #x#.@  
} $a\q<fN}  
*~4uF  
} e kI1j%fO  
`]WU=Ss  
改进后的归并排序: (0D0G-r:  
uVDB; 6  
package org.rut.util.algorithm.support; ?Pl>sCFm~  
RNoS7[&  
import org.rut.util.algorithm.SortUtil; ]S,I}NP  
*v:+A E  
/** UN| "D]>/  
* @author treeroot ]ZO^@sH  
* @since 2006-2-2 8<)[+ @$0  
* @version 1.0 k4pvp5}%  
*/ H) q9.Jg  
public class ImprovedMergeSort implements SortUtil.Sort { ZH_ J+  
]lQhIf6)k  
private static final int THRESHOLD = 10; '4HwS$mW3  
U@D=.6\B  
/* 5/:Zj,41{  
* (non-Javadoc) E_WiQ?p   
* Yl8tjq}iC  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )^%,\l-!  
*/ ]t0?,q.$7  
public void sort(int[] data) { .d8) *  
int[] temp=new int[data.length]; g IX"W;  
mergeSort(data,temp,0,data.length-1); sdS<-! %u4  
} E'[pNU*"x-  
28X)s!W'  
private void mergeSort(int[] data, int[] temp, int l, int r) { }}grJh>tGg  
int i, j, k; ^ 9;s nr  
int mid = (l + r) / 2; "793R^Tz  
if (l == r) &xH>U*c  
return; f=~@e#U  
if ((mid - l) >= THRESHOLD) BT d$n!'$n  
mergeSort(data, temp, l, mid); j(nPWEyJM  
else +t.T+` EG  
insertSort(data, l, mid - l + 1); 56?U4wj7{  
if ((r - mid) > THRESHOLD) S)g5Tu)  
mergeSort(data, temp, mid + 1, r); L=Dx$#|  
else * I'O_D  
insertSort(data, mid + 1, r - mid); .vQ2w  
Yz-b~D/=}  
for (i = l; i <= mid; i++) { MB^ b)\X  
temp = data; $Ae/NwIlc  
} Kh<v2  
for (j = 1; j <= r - mid; j++) { Duptles  
temp[r - j + 1] = data[j + mid]; Bu!Gy8\  
} vGm;en   
int a = temp[l]; dP)8T  
int b = temp[r]; pVbX#3  
for (i = l, j = r, k = l; k <= r; k++) { h3@mN\=h'  
if (a < b) { n=rPFp RLF  
data[k] = temp[i++]; *%Gy-5hM  
a = temp; fM S-  
} else { )E6m}?H5  
data[k] = temp[j--]; wQ.ild  
b = temp[j]; ;HqK^[1\  
} f_raICO{R  
} 9=3V}]^M  
} "]MF =-v  
;=h^"et  
/** HLk}E*.mC  
* @param data NTAPx=!1*  
* @param l _Seiwk &  
* @param i ) 3Y E$,  
*/ P.;B V",  
private void insertSort(int[] data, int start, int len) { C8&)-v|  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @ULr)&9  
} XHpoaHyx  
} Fzu"&&>0$  
} [gv2fqpP  
} JvHJ*E   
>b{%j8u M  
堆排序: ;Kkn7&'F  
|&RdOjw$u  
package org.rut.util.algorithm.support; ,3fw"P$  
mGL%<4R,  
import org.rut.util.algorithm.SortUtil; 0JNG\ARC  
d6hWmZVC  
/** P\N`E?lJL  
* @author treeroot @*%.V.  
* @since 2006-2-2 h+Dg"j<[  
* @version 1.0 II~D66 bF  
*/ sF|<m)Kt{W  
public class HeapSort implements SortUtil.Sort{ zhN'@Wj'_  
]4z?sk@  
/* (non-Javadoc) b;x^>(It  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bd)A6a\h  
*/ d(To)ly.  
public void sort(int[] data) { u1]5qtg"  
MaxHeap h=new MaxHeap(); ^vG*8,^S=8  
h.init(data); 8swj'SjX  
for(int i=0;i h.remove(); |L`w4;  
System.arraycopy(h.queue,1,data,0,data.length); /6 P()Upe  
} ^8V]g1]fiG  
_|6{(  
private static class MaxHeap{ JN3Oe5yB2@  
j/^0q90QO  
void init(int[] data){ p( Qm\g<  
this.queue=new int[data.length+1]; )}u.b-Nt.  
for(int i=0;i queue[++size]=data; ND21;  
fixUp(size); '{OZ[$E  
} m! p'nP  
} ?"sk"{  
rvr Ok  
private int size=0; dnNc,l&g  
E}1[&  
private int[] queue; u.!Pda  
-} Z  
public int get() { t5eux&C  
return queue[1]; ~^VcTSY@<L  
} s*]1d*B!  
H%])>  
public void remove() { O'idS`   
SortUtil.swap(queue,1,size--); YtIJJH  
fixDown(1); % ;6e@U}  
} urog.Q  
file://fixdown }"xC1<]  
private void fixDown(int k) { *;o=hM)Tp  
int j; p=7kFv  
while ((j = k << 1) <= size) { *AxKV5[H  
if (j < size %26amp;%26amp; queue[j] j++; Bxm^Arc>  
if (queue[k]>queue[j]) file://不用交换 ,VHvQU  
break; y4shW|>5_  
SortUtil.swap(queue,j,k); ^PWZ1.T  
k = j; ;o8cfD.z  
} Xb;CY9&  
} zo]7#  
private void fixUp(int k) { /{qr~7k,oQ  
while (k > 1) { {}lw%d?A  
int j = k >> 1; YTYYb#"Q  
if (queue[j]>queue[k]) 2@^8{  
break; '-ACNgNn  
SortUtil.swap(queue,j,k); UGR5ILf  
k = j; `9 $?g|rB  
} ^M?uv{354  
} 4Q3Q.(  
A?6b)B/e?  
} 5(DCq(\P*  
R8HA X  
} *(r85lEou)  
p]pFZ";70  
SortUtil: ] >`Q"g~0  
>:wk.<Z-  
package org.rut.util.algorithm; 9`c :sop  
^. Pn)J  
import org.rut.util.algorithm.support.BubbleSort; ]HCt%5  
import org.rut.util.algorithm.support.HeapSort; k,q` ^E8k  
import org.rut.util.algorithm.support.ImprovedMergeSort; O gycP4z[  
import org.rut.util.algorithm.support.ImprovedQuickSort; ~8|$KD4I  
import org.rut.util.algorithm.support.InsertSort; ][qZOIk@  
import org.rut.util.algorithm.support.MergeSort; &|9?B!,`  
import org.rut.util.algorithm.support.QuickSort; h!)(R<  
import org.rut.util.algorithm.support.SelectionSort; %7V?7BE  
import org.rut.util.algorithm.support.ShellSort; jP}N^  
R\X=Vg  
/** >GZF \ER  
* @author treeroot ?mF-zA'4]  
* @since 2006-2-2 mXa1SZnE   
* @version 1.0 GU"MuW`u2  
*/ =#>P !  
public class SortUtil { 6|9];)  
public final static int INSERT = 1; iOD9lR`s  
public final static int BUBBLE = 2; )fCl<KG*  
public final static int SELECTION = 3; Kk??}  
public final static int SHELL = 4; JXvHsCd?  
public final static int QUICK = 5; &=s{ +0  
public final static int IMPROVED_QUICK = 6; r%xNfTa  
public final static int MERGE = 7; dn`#N^Od  
public final static int IMPROVED_MERGE = 8; (T`x-wTl  
public final static int HEAP = 9; k"L_0HK  
SZyPl9.b  
public static void sort(int[] data) { b\;QR?16R  
sort(data, IMPROVED_QUICK); d5u,x.R  
} 12k)Ek9  
private static String[] name={ -pLb%f0?  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9K%E+_7b  
}; P3N f<  
n){\KIU/O  
private static Sort[] impl=new Sort[]{ &, K;F'  
new InsertSort(), H)(Jjk-O  
new BubbleSort(), %Cm4a49FNi  
new SelectionSort(), L- =^GNh  
new ShellSort(), LTJ|EXYA  
new QuickSort(), l?#([(WM  
new ImprovedQuickSort(), 47t^{WrT  
new MergeSort(), 3 #jPQ[+  
new ImprovedMergeSort(), tb_}w@:kU  
new HeapSort() 6%:'2;xM  
}; %=NqxF>>  
&Cdd  
public static String toString(int algorithm){ 67f#Z&r2k  
return name[algorithm-1]; HK ;C*;vC%  
} >r{,$)H0  
1_<'S34  
public static void sort(int[] data, int algorithm) { zzPgLE55  
impl[algorithm-1].sort(data); ..n-&(c32  
} N-vr_4{g  
#>!!#e!*  
public static interface Sort { EV~_-YC   
public void sort(int[] data); WlG/7$  
} Zb}=?fcL;@  
~omX(kPzK  
public static void swap(int[] data, int i, int j) { ^yBx.GrQc  
int temp = data; D4 e)v%  
data = data[j]; i%-c/ lop  
data[j] = temp; Q@l3XNH|c  
} ^>]p4Q3 6  
} bD49$N?>  
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