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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。 ;!@EixN-YH  
插入排序: JOn yrks  
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package org.rut.util.algorithm.support; >k7q g$  
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import org.rut.util.algorithm.SortUtil; ,38Eq`5&W  
/** Tsb{25`+  
* @author treeroot $gle8Z-  
* @since 2006-2-2 n_D8JF  
* @version 1.0 VzS&`d.h  
*/ @+,pN6}g  
public class InsertSort implements SortUtil.Sort{ L];y}]:F*  
'WyTI^K9  
/* (non-Javadoc) o/cjXun*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^,Ydr~|T  
*/ 8 (jUe  
public void sort(int[] data) { 4B+9z^oQ  
int temp; =dP{Gh  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); c>bq%}  
} 4IdT'  
} vm23U^VJ  
} O  OFVnu  
9X<OJT;3J  
} ;)0w:Zn/[  
{1 J&xoV"  
冒泡排序: a)-FG P^  
bucR">_p  
package org.rut.util.algorithm.support; 7Ob*Yv=[  
YMpf+kN  
import org.rut.util.algorithm.SortUtil; \6|/RFT  
,FQdtNMap  
/** >ndJNinV  
* @author treeroot '8FC<=+p[  
* @since 2006-2-2 }S_oH9A  
* @version 1.0 }_.:+H!@  
*/ mZk0@C&:6  
public class BubbleSort implements SortUtil.Sort{ 1m<RwI3s  
%5Kq^]q;Y  
/* (non-Javadoc) 4R +.N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ac k}QzXO  
*/ f5RE9%.#~  
public void sort(int[] data) { u?+bW-D'd  
int temp;  Wa/g`}  
for(int i=0;i for(int j=data.length-1;j>i;j--){ 3M*Bwt;F_  
if(data[j] SortUtil.swap(data,j,j-1); }w-wSkl1  
} 4_M>OD/"  
} /BKe+]dS*  
} 7J$b$P0}  
} {0\,0*^p  
Y o0FUj  
} .~lKBkS`!  
n_K~ vD  
选择排序: T>>YNaUL  
;a"q'5+Ne  
package org.rut.util.algorithm.support; Nw J:!  
aiCFH_H4;L  
import org.rut.util.algorithm.SortUtil; -l+P8:fL~  
v"u^M-_  
/** ][PzgzG  
* @author treeroot ~o3Hdd_#}N  
* @since 2006-2-2 }WFf''Z-  
* @version 1.0 }7<5hn E  
*/ Zwt;d5U  
public class SelectionSort implements SortUtil.Sort { D6D1S/:ij'  
Z~G my7h(  
/* PnT)LqEF  
* (non-Javadoc) zQy"m-Q  
* 3ucP(Ex@tg  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CCijf]+  
*/ JM$.O;y -  
public void sort(int[] data) { nHFrG =o,  
int temp; "LhUxnll  
for (int i = 0; i < data.length; i++) { .o{0+fC#  
int lowIndex = i; 1tzV8(7  
for (int j = data.length - 1; j > i; j--) { u}hF8eD  
if (data[j] < data[lowIndex]) { ,M !tm7  
lowIndex = j; <M?:  
} |Q~cX!;  
} 6bc3 37b  
SortUtil.swap(data,i,lowIndex); 1a0kfM$  
} UsVMoX^  
} #eP LOR&q  
 2B~wHv  
} l kIn%=Z  
z5\;OLJS,  
Shell排序: `XTh1Z\  
Upl6:xYrG  
package org.rut.util.algorithm.support; |rRO@18dA  
OY-w?'p?W  
import org.rut.util.algorithm.SortUtil; 6+rlXmd  
F^aR+m  
/** 4] > ]-b  
* @author treeroot `WEZ"5n  
* @since 2006-2-2 =%)+%[wv  
* @version 1.0 Uh}seB#mJj  
*/ 4wzlJ19E(  
public class ShellSort implements SortUtil.Sort{ Qq-"Cg@-/  
SD\= m/W  
/* (non-Javadoc) /{2*WI;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }n,Zl>T9  
*/ Myat{OF  
public void sort(int[] data) { dth&?/MERL  
for(int i=data.length/2;i>2;i/=2){ Is<"OQ  
for(int j=0;j insertSort(data,j,i); 1&=0Wg0ig  
} ;.s l*q1A  
} t,)N('m}=  
insertSort(data,0,1); ^he=)rBb?  
} >M!xiQX  
?C0l~:j7D  
/** dGfVZDsr]  
* @param data gxPx&Z6jF  
* @param j Q\ ^[!|  
* @param i UCrh/bTm  
*/ 3CjL\pIC  
private void insertSort(int[] data, int start, int inc) { 7)rWw<mY  
int temp; l7(!`NPbC  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); !33#. @[  
} 6~:Sgt nU  
} Rx36?/  
} }G46g#_6d>  
Q "r_!f  
} `?\tUO2_T  
TZir>5  
快速排序: ^62|d  
&}mw'_ I  
package org.rut.util.algorithm.support; 5y2? f  
aFiCZHohw  
import org.rut.util.algorithm.SortUtil; DH DZ_t:  
eg"Gjp- 4=  
/** _zxLwU1(x  
* @author treeroot ulHn#)  
* @since 2006-2-2 4Q=ftY<  
* @version 1.0 3Rg}+[b  
*/ fyz nuUl  
public class QuickSort implements SortUtil.Sort{ /NT[ETMk+  
@(``:)Z<b  
/* (non-Javadoc) 3XiO@jzre  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =! Vf  
*/ 2g*J  
public void sort(int[] data) { I:(m aMc  
quickSort(data,0,data.length-1); NW|f7 ItX  
} h.rD}N\L  
private void quickSort(int[] data,int i,int j){ $h9='0Wi0'  
int pivotIndex=(i+j)/2; `D( xv  
file://swap /5AW?2)  
SortUtil.swap(data,pivotIndex,j); #0I{.Wy]  
|4)  
int k=partition(data,i-1,j,data[j]); G |*(8r()  
SortUtil.swap(data,k,j); +,+vkpL-%  
if((k-i)>1) quickSort(data,i,k-1); WE}kTq  
if((j-k)>1) quickSort(data,k+1,j); ;P&y,:<m:  
;T]d M fO  
} 5 v^yQ<70  
/** `?*%$>W#"  
* @param data I|oT0y &  
* @param i V=I"-k}RL  
* @param j &WXY'A=  
* @return +^aFs S  
*/ $VG*q  
private int partition(int[] data, int l, int r,int pivot) { <[aDo%,A  
do{ qpoV]#iW  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Yw3oJf&  
SortUtil.swap(data,l,r); |9xI_(+{kP  
} z_;3H,z`  
while(l SortUtil.swap(data,l,r); )|j[uh6w o  
return l; v4Zb? Yb  
} }g +;y  
P47V:E%  
} @ufo$?D  
[@ <sFP;g  
改进后的快速排序: TjWE_Bq]g  
DVZdClAL  
package org.rut.util.algorithm.support; >!e<}84b  
c97{Pu  
import org.rut.util.algorithm.SortUtil; 148V2H)  
?[TfpAtQ`  
/** dCYCHHHF  
* @author treeroot 9A,Z|q/z5  
* @since 2006-2-2 dBsX*}C  
* @version 1.0 h[KvhbD3   
*/ uy_wp^  
public class ImprovedQuickSort implements SortUtil.Sort { cxeghy:;U  
RT/o$$  
private static int MAX_STACK_SIZE=4096; %\O#&=$E  
private static int THRESHOLD=10; 3H\w2V  
/* (non-Javadoc) )O+}T5c=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lv0nEj8F  
*/ P`4]-5gE  
public void sort(int[] data) { a`9L,8Ve  
int[] stack=new int[MAX_STACK_SIZE]; Mk 0+D#  
8eIUsI.o  
int top=-1; +'@+x'/{^  
int pivot; 2'jOP" G  
int pivotIndex,l,r; #qU-j/Qf  
Th[f9H%  
stack[++top]=0; DF]9@{  
stack[++top]=data.length-1; E "iUq  
SEwku}  
while(top>0){ d9*hBm  
int j=stack[top--]; uf<@ruN  
int i=stack[top--]; MvLs%GE%  
}uHrto3M  
pivotIndex=(i+j)/2; iF5'ygR-Z  
pivot=data[pivotIndex]; c:S] R"  
W+wA_s2&D  
SortUtil.swap(data,pivotIndex,j); zQ?!f#f  
'mCe=Y  
file://partition 2=0DCF;Bv  
l=i-1; A,-6|&F  
r=j; ;a=w5,h:  
do{ ?PA$Ur21lw  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); K`&oC8p  
SortUtil.swap(data,l,r); N/YWby=H  
} 6h?gs"[j  
while(l SortUtil.swap(data,l,r); C fEmT8sa  
SortUtil.swap(data,l,j); CHd9l]Rbe  
I3 =#@2  
if((l-i)>THRESHOLD){ X5fmz%VK@  
stack[++top]=i; HjvCujJ  
stack[++top]=l-1; ~I/@i  
} M}:=zcZ l  
if((j-l)>THRESHOLD){ +;BAV  
stack[++top]=l+1; exh/CK4;  
stack[++top]=j; |Z\R*b"  
} X)SDG#&+bF  
3P~o"a>  
}  j1?j6s  
file://new InsertSort().sort(data); .M,RFC  
insertSort(data); ~"pKe~h   
} kh~'Cn "O  
/** Mwb/jTp  
* @param data r?m+.fJB  
*/ ^L1L=c;,  
private void insertSort(int[] data) { D.D$#O_n.S  
int temp; WH ?}~u9  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 'ckQg=zPR  
} ,y4I[[  
} ZN"j%E{d  
} LZPuDf~/  
f-6vLX\Vu  
} waX>0e  
AL/?,%F  
归并排序: .iCDXc{#  
GWsE;  
package org.rut.util.algorithm.support; rqv))Zo`  
{l_{T4xToB  
import org.rut.util.algorithm.SortUtil; NW~z&8L  
c,so`I3rI  
/** u$%t)2+$4  
* @author treeroot U<XSj#&8|  
* @since 2006-2-2 *vgl*k?)  
* @version 1.0 R(.}C)q3  
*/ s?8<50s  
public class MergeSort implements SortUtil.Sort{ ,h|qi[7  
f~E*Zz`;  
/* (non-Javadoc) Vc^HVyAx@n  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $VAx:Y|  
*/ j R=s#Xz  
public void sort(int[] data) { >56>*BHD  
int[] temp=new int[data.length]; x@mL $  
mergeSort(data,temp,0,data.length-1); f)]%.>  
} AV 8n(  
"G >3QL+O|  
private void mergeSort(int[] data,int[] temp,int l,int r){ >+. ( r]  
int mid=(l+r)/2; [{4 MR%--  
if(l==r) return ; T0)4v-EO  
mergeSort(data,temp,l,mid); js1!9%BV  
mergeSort(data,temp,mid+1,r); y"]n:M:(  
for(int i=l;i<=r;i++){ %B.D^]S1:  
temp=data; nEzf.[+9/  
}  mw_Ew]&  
int i1=l; *5bLe'^\|K  
int i2=mid+1; Y_`-9'&  
for(int cur=l;cur<=r;cur++){ N@B9 @8h  
if(i1==mid+1) R.7:3h  
data[cur]=temp[i2++]; [m^+,%m5]  
else if(i2>r) Cg*H.f%Mr  
data[cur]=temp[i1++]; y@CHR  
else if(temp[i1] data[cur]=temp[i1++]; B?VhIP e  
else sL E#q+W  
data[cur]=temp[i2++]; 2r$#m*  
} IwGqf.!.>  
} NM)k/?fA  
H>r!i 4l  
} 3_JCU05H}  
^Rm  
改进后的归并排序: No2b" G@  
!lo/xQ<  
package org.rut.util.algorithm.support; 6c0>gUQx-  
CJ}5T]WZ  
import org.rut.util.algorithm.SortUtil; @FdSFQ/9  
#plY\0E@  
/** ~>9_(L  
* @author treeroot q2HYiH^L  
* @since 2006-2-2 4k./(f2+  
* @version 1.0 RN=` -*E1  
*/ U%0Ty|$Y   
public class ImprovedMergeSort implements SortUtil.Sort { gGfoO[B  
8Sz})UZ  
private static final int THRESHOLD = 10; Spt ? >sm  
Y8flrM2CwG  
/* J>d.dq>r  
* (non-Javadoc) O-)-YVU  
* " R xP^l  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0!v ->Dk  
*/ 1;<R#>&,*  
public void sort(int[] data) { x@8a''  
int[] temp=new int[data.length]; KZ~*Nz+H2  
mergeSort(data,temp,0,data.length-1); R$zH]  
} 6q 2_WX  
-G6U$  
private void mergeSort(int[] data, int[] temp, int l, int r) { hy|b6wF&  
int i, j, k; `est|C '+  
int mid = (l + r) / 2; }i!J/tJ)b  
if (l == r) Z|}G6]h  
return; $XoQ]}"O  
if ((mid - l) >= THRESHOLD) o M Zq+>  
mergeSort(data, temp, l, mid); U`hY{E;  
else !?Wp+e6  
insertSort(data, l, mid - l + 1); }@.|?2b +  
if ((r - mid) > THRESHOLD) FLEo*9u>b  
mergeSort(data, temp, mid + 1, r); Sna4wkbS  
else }1IpON  
insertSort(data, mid + 1, r - mid); `({T]@]V  
LR" 9D  
for (i = l; i <= mid; i++) { YuB+k^  
temp = data; S*yjee<@  
} BT}&Y6  
for (j = 1; j <= r - mid; j++) { qWw\_S  
temp[r - j + 1] = data[j + mid]; $AHQmyg<  
} EqI(|bFwy  
int a = temp[l]; =-p$jXVW%  
int b = temp[r]; 7g_]mG [6  
for (i = l, j = r, k = l; k <= r; k++) { 'uy/o)L  
if (a < b) { w&ak"GgV  
data[k] = temp[i++]; O*#*%RL|  
a = temp; vTn}*d.K=  
} else { iYC9eEF  
data[k] = temp[j--]; \l~*PG2  
b = temp[j]; 47J5oPT2'  
} $\9~)Rq6  
} 8V~vXnkM  
}  T Q,?>6n  
4*$G & TX  
/** e1P"[|9>R  
* @param data 7g3 >jh  
* @param l ;J7F J3n  
* @param i {z|;Xi::"  
*/ .`&F>o(A  
private void insertSort(int[] data, int start, int len) { 5ZBKRu  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H/}]FmjN  
} NVRLrJWpp  
} *?MGMhE  
} fDLG>rXPT  
} =FD;~  
Ha)ANAD  
堆排序: :,)lm.}]t  
<F04GO\  
package org.rut.util.algorithm.support; "jw<V,,  
4bgqg0z>  
import org.rut.util.algorithm.SortUtil; G}p\8Q}'  
={u0_j W  
/** 6^DR0sO  
* @author treeroot q:g2Zc'Y~W  
* @since 2006-2-2 i&n'N8D@  
* @version 1.0 /t(C>$ }p  
*/ mx=BD'  
public class HeapSort implements SortUtil.Sort{ vhhC> 7  
h yv2SxP*  
/* (non-Javadoc) %Rsp;1Z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sf8{h|71  
*/ `jOX6_z?I  
public void sort(int[] data) { 71l%MH  
MaxHeap h=new MaxHeap(); TiH) 5  
h.init(data); `/_G$_  
for(int i=0;i h.remove(); 4ni3kmvX  
System.arraycopy(h.queue,1,data,0,data.length); A%^ILyU6c  
} x,'!eCKN  
z<5m fAm  
private static class MaxHeap{ =Qn ;_+Ct  
aCL!]4K84$  
void init(int[] data){ jq!tT%o*B  
this.queue=new int[data.length+1]; SCTA=l.  
for(int i=0;i queue[++size]=data; K^R,Iu/M  
fixUp(size); @$z<i `4  
} 'PP#^aI,  
} ^4o;$u4R  
(IPY^>h  
private int size=0; PsZ >P|e1  
O]m+u  
private int[] queue; 'g{9@PkGn  
Ox-|JJ=  
public int get() { jQ)T67  
return queue[1]; Mec5h}^  
} /:FOPPs  
.c$316  
public void remove() { }-@`9(o`)  
SortUtil.swap(queue,1,size--); iya"ky~H  
fixDown(1); =yy5D$\  
} 9`9R!=NM  
file://fixdown h*<P$t  
private void fixDown(int k) { wKsT7c'  
int j; C/-63O_  
while ((j = k << 1) <= size) { [VWUqlNt>  
if (j < size %26amp;%26amp; queue[j] j++; uDZT_c'Y  
if (queue[k]>queue[j]) file://不用交换 y  TDNNK  
break; Kde9 $  
SortUtil.swap(queue,j,k); RH|XxH*  
k = j; 3Gip<\$v  
} b2FO$Os  
} _H/8_[xk  
private void fixUp(int k) { ?)#5X_V-q  
while (k > 1) { mbueP.q[?  
int j = k >> 1; >&U,co$>  
if (queue[j]>queue[k]) H8On<C=  
break; Z@$8I{}G  
SortUtil.swap(queue,j,k); l(#)WWr+  
k = j; dYgXtl=#j  
} fX|Y;S-@+  
} >_LDMs[-p  
Tq4-wE+  
} W='> :H  
%x} O1yV  
} &kpwo )  
STaA]i}P  
SortUtil: J:\|Nc?  
[r[ =W!  
package org.rut.util.algorithm; 0xXC^jx:  
;I!MLI  
import org.rut.util.algorithm.support.BubbleSort; eET}r 24  
import org.rut.util.algorithm.support.HeapSort; >MvDVPi~+  
import org.rut.util.algorithm.support.ImprovedMergeSort; v 7x:dcV  
import org.rut.util.algorithm.support.ImprovedQuickSort; N~xLu8,  
import org.rut.util.algorithm.support.InsertSort; $81*^  
import org.rut.util.algorithm.support.MergeSort; )d>!"JB-  
import org.rut.util.algorithm.support.QuickSort; L:'J Bhg  
import org.rut.util.algorithm.support.SelectionSort; 5hy""i  
import org.rut.util.algorithm.support.ShellSort; J`^I./  
,xxR\}  
/** D N*t~Z3[  
* @author treeroot eh5gjSqx  
* @since 2006-2-2 _Wa. JUbv  
* @version 1.0 (/j); oSK  
*/ ^R@j=_8}  
public class SortUtil { !U~WK$BP  
public final static int INSERT = 1; 2]ape !(  
public final static int BUBBLE = 2; >cCR2j,r  
public final static int SELECTION = 3; go<W( ,O  
public final static int SHELL = 4; ]]wA[c~G  
public final static int QUICK = 5; }B.H|*uO  
public final static int IMPROVED_QUICK = 6; |a!fhl+  
public final static int MERGE = 7; v*[.a#1^  
public final static int IMPROVED_MERGE = 8; AD<q%pu&H?  
public final static int HEAP = 9; X<%Q"2hW  
x HhN  
public static void sort(int[] data) { ;{%\9nS  
sort(data, IMPROVED_QUICK); {b   
} _\GC(  
private static String[] name={ =Fr(9 (  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E0?iXSJ  
}; ])!o5`ltZ  
ut I"\1hQ  
private static Sort[] impl=new Sort[]{ Aj4T"^fv  
new InsertSort(), gE?| _x#  
new BubbleSort(), ?n ZY)  
new SelectionSort(), d|yAs5@  
new ShellSort(), jE/AA!DC#  
new QuickSort(), }-sdov<<  
new ImprovedQuickSort(), jYhB +|  
new MergeSort(), jWE :ek*  
new ImprovedMergeSort(), TTTPxO,  
new HeapSort() & J2M1z%  
}; cu/5$m?xx  
9BuSN*4  
public static String toString(int algorithm){ /Dj=iBO  
return name[algorithm-1]; 8!Ww J Oe  
} 7F{3*`/6  
'5|h)Q5  
public static void sort(int[] data, int algorithm) { `p;I}  
impl[algorithm-1].sort(data); 9Q+'n$s0^  
} jyZWV L:_  
9AJ7h9L  
public static interface Sort { >\Ww;1yV  
public void sort(int[] data); c>)Yt^ q&K  
} d>t<_}  
 D 'Zt  
public static void swap(int[] data, int i, int j) { AQ[GO6$,%H  
int temp = data; G8Y<1%`<  
data = data[j]; % V8U (z  
data[j] = temp; #I bp(  
} lH6OcD:kj  
} +P`*kj-P\  
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