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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。 I~HA ad,k  
插入排序: %<|<%~l&  
aU.!+e%_  
package org.rut.util.algorithm.support; klc$n07  
L[5U(`q[  
import org.rut.util.algorithm.SortUtil; 'aeuL1mz  
/** b!/-9{  
* @author treeroot %ol1WG9  
* @since 2006-2-2 GAs.?JHd  
* @version 1.0 svt3gkR0  
*/ [tC=P&<  
public class InsertSort implements SortUtil.Sort{ Oku7&L1  
g%)cyri  
/* (non-Javadoc) 39 pA:3iTd  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q7zpu/5?  
*/ #<V5sgq S  
public void sort(int[] data) { =|fB":vk  
int temp; H4wDF:n0H  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); SpIiMu(  
} [T3%Xt'4  
} T`u ,!S  
} 4qd( a)NdY  
l%u8Lq  
} 2J)  
150x$~{/  
冒泡排序: 8wkt9:  
 zDxJK  
package org.rut.util.algorithm.support; ,CBE&g  
Fl(j,B6Z  
import org.rut.util.algorithm.SortUtil; 0\k {v  
Lv)1 )'v0  
/** yYTOp^  
* @author treeroot !X[7m  
* @since 2006-2-2 b`GKGqbJ  
* @version 1.0 X #$l7I9H  
*/ &:}WfY!hX  
public class BubbleSort implements SortUtil.Sort{ J9J/3O Q=  
kf95)iLo  
/* (non-Javadoc) ExFz@6@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "d0D8B7HI@  
*/ T;,,!  
public void sort(int[] data) { c:B` <  
int temp; I,Jb_)H&t  
for(int i=0;i for(int j=data.length-1;j>i;j--){ +'VYqu/  
if(data[j] SortUtil.swap(data,j,j-1); On[yL$?  
} zW`a]n.  
} \nTV;@F  
} YKOj  
} g">^#^hBE  
{=,I>w]T|W  
} +KTHZpp!c2  
.jbxA2  
选择排序: CFoR!r:X  
alsD TQ'  
package org.rut.util.algorithm.support; \IqCC h  
<<Z, 1{3F  
import org.rut.util.algorithm.SortUtil; >$a;+v  
g<$2#c}  
/** $:A80(#+  
* @author treeroot }YM[aq?6  
* @since 2006-2-2 C/9]TkX}q  
* @version 1.0 CZ{7?:^f  
*/ |v 1* [(  
public class SelectionSort implements SortUtil.Sort { oDt{;S8|]  
mwZ) PySm)  
/* E>r7A5Uo  
* (non-Javadoc) *l%&/\  
* ^HE@ [b  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z@>kqJ%  
*/ s+=':Gcb(C  
public void sort(int[] data) { <q I!Dj{  
int temp; b9v<Jk  
for (int i = 0; i < data.length; i++) { x2OAkkH\]i  
int lowIndex = i; 0fqycGSmU  
for (int j = data.length - 1; j > i; j--) { 'C>sYSL  
if (data[j] < data[lowIndex]) { e3[Q6d&|  
lowIndex = j; {/,AMJ<:G]  
} z"Cyjmg"  
} O{U j  
SortUtil.swap(data,i,lowIndex); `'pAiu  
} @a 7U0$,O#  
} Y|tK19  
5;HCNwX  
} {&6i$4T  
eYu0")  
Shell排序: :s-9@Yl|  
9E[==2TO  
package org.rut.util.algorithm.support; 4_$.gO  
K7nyQGS  
import org.rut.util.algorithm.SortUtil; > +00[T  
9}4~3_gv;M  
/** jmP;(j.|  
* @author treeroot N8J(RR9O  
* @since 2006-2-2 S a}P |qI  
* @version 1.0 2Je]dj4  
*/ -_O j iQ R  
public class ShellSort implements SortUtil.Sort{ i1bmUKZ8'L  
#ZP;] W  
/* (non-Javadoc) |WOc0M[U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cF?0=un  
*/ )V_;]9<wt  
public void sort(int[] data) { 6)20%*[  
for(int i=data.length/2;i>2;i/=2){ +m/n~-6q  
for(int j=0;j insertSort(data,j,i); M9Nr/jE  
} \F""G,AWq{  
} U;!J(Us  
insertSort(data,0,1); R-wz+j#  
} 3iL\<^d*ht  
!?+q7U  
/** L1y71+iqU  
* @param data pmO0/ty  
* @param j ,@Kn@%?$  
* @param i Hk(=_[S  
*/ kJNwA8 7  
private void insertSort(int[] data, int start, int inc) { h@y>QhYU0  
int temp; hr hj4  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 8Kk41=  
} %}XyzGq{  
} M* {5> !\  
} o/n4M]G  
@g]EY&Uzl  
} (vvD<S*  
@X560_x[q  
快速排序: f$vTDak  
GS}JyU  
package org.rut.util.algorithm.support; 9jM7z/Ff  
DVJn;X^T:  
import org.rut.util.algorithm.SortUtil; {];-b0MS~  
1uB$@a\  
/** k,f/9e+#  
* @author treeroot \<G"9w  
* @since 2006-2-2 |{_>H '  
* @version 1.0 $J&c1  
*/ y*v|q=  
public class QuickSort implements SortUtil.Sort{ >7S@3,C3ke  
j]vEo~Bbh  
/* (non-Javadoc) >mG64N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zj1bG{G=i  
*/ yf4L0.  
public void sort(int[] data) { TY'61xWi  
quickSort(data,0,data.length-1); @2 *Q*  
} =)gdxywoC  
private void quickSort(int[] data,int i,int j){ ;oDr8a<A  
int pivotIndex=(i+j)/2; %qTIT?6'  
file://swap 6<R[hIWpZ}  
SortUtil.swap(data,pivotIndex,j); 5NH4C  
nj0]c`6rN@  
int k=partition(data,i-1,j,data[j]); siT`O z|,  
SortUtil.swap(data,k,j); G#^0Bh&  
if((k-i)>1) quickSort(data,i,k-1); X8N9*v y  
if((j-k)>1) quickSort(data,k+1,j); 3wcF R0f  
JY^i  
} Dg{d^>T!_x  
/** N^@:+,<3  
* @param data FouN}X6  
* @param i het<#3Bo  
* @param j bS954d/  
* @return \<09.q<8  
*/ GG +T-  
private int partition(int[] data, int l, int r,int pivot) { !6@'H4cb=  
do{ -5ZmIlL.S  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); L[,19 ;(  
SortUtil.swap(data,l,r); u]9\_{c]Q  
} sowwXrECg@  
while(l SortUtil.swap(data,l,r); T#*H  
return l; 22U`1AD3U  
} AS re@pW  
5,g +OY=\  
} v\@RwtP  
FF! PmfF'  
改进后的快速排序: ela^L_NhF  
mtn^+*  
package org.rut.util.algorithm.support; evYn}  
J%M [8  
import org.rut.util.algorithm.SortUtil; jX(hBnGW  
T?1V%!a;f  
/** GQ>0E  
* @author treeroot ~1[n@{*:(  
* @since 2006-2-2 w>=N~0@t  
* @version 1.0 w`V6vYd@  
*/ .R'M'a#*!A  
public class ImprovedQuickSort implements SortUtil.Sort { Y0A(- "  
;FRUB@:  
private static int MAX_STACK_SIZE=4096; _vDmiIn6K  
private static int THRESHOLD=10; .kn2M&P>=  
/* (non-Javadoc) a#;;0R $  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |5O>7~Tp  
*/ $~W5! m  
public void sort(int[] data) { }u=Oi@~  
int[] stack=new int[MAX_STACK_SIZE]; ^2+ Vt=*  
D&D6!jz  
int top=-1; ) ba~7A  
int pivot; lv'WRS'}  
int pivotIndex,l,r; '?L^Fa_H  
Q{L:pce-  
stack[++top]=0; l:uQ#Z)  
stack[++top]=data.length-1; x3+ {Y  
^879sI  
while(top>0){ 6w, "i#E!  
int j=stack[top--]; V-n{=8s  
int i=stack[top--]; 'wG1un;t  
wlaPE8Gc  
pivotIndex=(i+j)/2; "QxULiw  
pivot=data[pivotIndex]; r]Wt!oHm5  
n$r`s`}  
SortUtil.swap(data,pivotIndex,j); #S'uqP!  
Br 7q.  
file://partition d(d<@cB9  
l=i-1; ,aC}0t  
r=j; :T G;W,`.V  
do{ c {%mi  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); -OlrA{=c_  
SortUtil.swap(data,l,r); 10 *Tk 8  
} XGH:'^o_  
while(l SortUtil.swap(data,l,r); Kw" y#Ys]  
SortUtil.swap(data,l,j); #X?[")R  
jYRSV7d  
if((l-i)>THRESHOLD){ nW7: ]  
stack[++top]=i; bS r"k  
stack[++top]=l-1; j9h fW'  
} =2Yt[8';  
if((j-l)>THRESHOLD){ YZ4`b-  
stack[++top]=l+1; KGg S"d  
stack[++top]=j; ]0ErT9  
} #?>)5C\Hqy  
]Z8u0YtM)  
} 4^l9d  
file://new InsertSort().sort(data); 4oiE@y&{4  
insertSort(data); `cXLa=B)9  
} c]aU}[s1  
/** t~/:St  
* @param data 6{=U= *  
*/ AG=PbY9  
private void insertSort(int[] data) { 0P9\;!Y  
int temp; dR1IndZl  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); *YvtT (Gt  
} ;Jg$C~3tf  
} \2 N;V E  
} %bN{FKNN  
LkS tU)  
} Mh-"B([Z  
8VMA~7^  
归并排序: o?>0WSLlm  
f/UU{vX(  
package org.rut.util.algorithm.support; nLz;L r!  
WX?nq'nr  
import org.rut.util.algorithm.SortUtil; 8^y=YUT  
s_IFl5D]  
/** %"A8Af**I  
* @author treeroot >,]a>V  
* @since 2006-2-2 N wk  
* @version 1.0 )- &@ 8`  
*/ t,|Apl]  
public class MergeSort implements SortUtil.Sort{ 9u{[e"  
&'W7-Z\j-  
/* (non-Javadoc) ?j.a>{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q!@M/@-Ky  
*/ E2>{ seZ  
public void sort(int[] data) { _.; PLq~0  
int[] temp=new int[data.length]; Yp;Z+!!UZ  
mergeSort(data,temp,0,data.length-1); scH61Y8`  
} /g{*px|  
="& GU%$  
private void mergeSort(int[] data,int[] temp,int l,int r){ 5.{=Op!  
int mid=(l+r)/2; Sc>mw   
if(l==r) return ; 'sUOi7U  
mergeSort(data,temp,l,mid); 81{8F  
mergeSort(data,temp,mid+1,r); 49=pB,H;H  
for(int i=l;i<=r;i++){ }={@_g#  
temp=data; 8fP2qj0  
} 9m$"B*&6G  
int i1=l; V4V`0I  
int i2=mid+1; M11\Di1  
for(int cur=l;cur<=r;cur++){ 6)uBUM;i  
if(i1==mid+1) 5tbCx!tL  
data[cur]=temp[i2++]; +a.2\Qt2A  
else if(i2>r) 2 {b/*w  
data[cur]=temp[i1++]; K-TsSW$}  
else if(temp[i1] data[cur]=temp[i1++]; -@(LN%7!C  
else %"mI["{  
data[cur]=temp[i2++]; ojnO69v  
} &@oI/i&0B  
} ]j>xQm\  
qSr]d`7@  
} giNXX jl  
J\*uW|=F  
改进后的归并排序: _F6<ba}o3  
g@>llve{  
package org.rut.util.algorithm.support; lu"0\}7X  
I#(lxlp"Ho  
import org.rut.util.algorithm.SortUtil; Hvk~BP' m  
/ZV2f3;t  
/** INbV6jZL  
* @author treeroot D}y W:Pi'  
* @since 2006-2-2 3xs<w7  
* @version 1.0 Lf5zHUH  
*/ i;^lh]u  
public class ImprovedMergeSort implements SortUtil.Sort { Gb `)d  
9 fB|e|  
private static final int THRESHOLD = 10; Nq`;\E.M  
CjpGo}a/  
/* ,:(s=J N+  
* (non-Javadoc) ;99oJD,  
* ; oa+Z:;f  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (7G4v  
*/ C`;igg$t_  
public void sort(int[] data) { "ZGP,=?y2  
int[] temp=new int[data.length]; t~o"x.  
mergeSort(data,temp,0,data.length-1); GO"|^W  
} 3Y38l P:>h  
wx3_?8z/O  
private void mergeSort(int[] data, int[] temp, int l, int r) { <)T| HKx  
int i, j, k; _ZhQY,  
int mid = (l + r) / 2; J "I,]  
if (l == r) 8S8qj"s  
return; gvT}UNqL  
if ((mid - l) >= THRESHOLD) f9u=h}  
mergeSort(data, temp, l, mid); *zPqXtw!j  
else $}W T"K  
insertSort(data, l, mid - l + 1); T)I)r239h  
if ((r - mid) > THRESHOLD) gf8o~vKX$G  
mergeSort(data, temp, mid + 1, r); %evb.h)  
else aNu.4c/5  
insertSort(data, mid + 1, r - mid); \09A"fs{  
@)h>vg  
for (i = l; i <= mid; i++) { 06Wqfzceb  
temp = data; $4g {4-)  
} o^2MfFS  
for (j = 1; j <= r - mid; j++) { ZXb|3|D  
temp[r - j + 1] = data[j + mid]; TbD  
} =8 @DYz'  
int a = temp[l]; .S|7$_9;b  
int b = temp[r]; sn:VMHrOT  
for (i = l, j = r, k = l; k <= r; k++) { j_g(6uZhz3  
if (a < b) { j ^j"w(a  
data[k] = temp[i++]; ly` A,dh  
a = temp;  =Iop  
} else { |-V:#1wR.]  
data[k] = temp[j--]; &233QRYM  
b = temp[j]; M6p\QKi  
} 9 o,` peH  
} jaEe$2F2  
} bI ;I<Qa  
MBt\"b#t  
/** &'fER-  
* @param data pSlc (M>  
* @param l L/jaUt[,  
* @param i ExtC\(X;  
*/ P0}B&B/a:  
private void insertSort(int[] data, int start, int len) { Fqw4XR_`~  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e7GYz7  
} ?:$ q~[LY  
} Kb+SssF  
} PI*@.kqR-  
} MuD ? KK  
phH@{mI  
堆排序: sA?8i:]O:  
m)L50ot:/  
package org.rut.util.algorithm.support; ."ZG0Zg  
k'O.1  
import org.rut.util.algorithm.SortUtil; QtnNc!,n  
[voZ=+/  
/** _33 b %  
* @author treeroot b_TI_  
* @since 2006-2-2 F62 uDyY  
* @version 1.0 RWR{jM]V  
*/ :-jbIpj'  
public class HeapSort implements SortUtil.Sort{ H14Q-2U1xa  
$3"hOEN@5`  
/* (non-Javadoc) vU%K%-yXG7  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H-pf8  
*/ TQck$&  
public void sort(int[] data) { (NFrZ0  
MaxHeap h=new MaxHeap(); %@C8EFl%3  
h.init(data); @LOfqQ$FE  
for(int i=0;i h.remove(); /lECgu*#69  
System.arraycopy(h.queue,1,data,0,data.length); &fB=&jc*j  
} ]|!|3lQ  
} iKjef#J  
private static class MaxHeap{ ~B{08%|oK  
7<WUj K|  
void init(int[] data){ 2J t{oh|  
this.queue=new int[data.length+1]; ;l!<A  
for(int i=0;i queue[++size]=data; 3H!]X M  
fixUp(size); i_N8)Z;r  
} CsZm8oL$  
} Mbxl{M >  
d;dT4vx$[M  
private int size=0; eQuw uT  
S'HA]  
private int[] queue; 4k^P1  
[w<_Wj  
public int get() { 0qNk.1pv  
return queue[1]; M#4;y,n<k  
} w? _8OJ  
w =F9>  
public void remove() { 8gNTW7W/  
SortUtil.swap(queue,1,size--); YT8q0BR]  
fixDown(1); :N<Qk  
} _fk}d[q0  
file://fixdown Pi"?l[T0  
private void fixDown(int k) { 8lx}0U  
int j; 6V$ )ym*F  
while ((j = k << 1) <= size) { UY9*)pEE  
if (j < size %26amp;%26amp; queue[j] j++; [c=W p  
if (queue[k]>queue[j]) file://不用交换 =aB+|E  
break; # l9VTzi  
SortUtil.swap(queue,j,k); m^XO77"  
k = j; yn!;Z ._  
} "=DQ {(L  
} /#T{0GBXe  
private void fixUp(int k) { ,X3D< wl  
while (k > 1) { yL asoh  
int j = k >> 1; `5- ;'nX  
if (queue[j]>queue[k]) <VD7(j]'^  
break; C<teZz8/w  
SortUtil.swap(queue,j,k); fSd|6iFH  
k = j; \h'7[vkr  
} =b*GV6b  
} h'S0XU ;  
T P#Ncqh  
} Io<T'K  
bp'%UgA)1  
} ZB1%Kn#zo4  
(5] [L<L  
SortUtil: Pteti  
sT1k]duT  
package org.rut.util.algorithm; ;R0LJApey  
B ZU@W%E  
import org.rut.util.algorithm.support.BubbleSort; +)yoQRekX  
import org.rut.util.algorithm.support.HeapSort; [nHN@ p|  
import org.rut.util.algorithm.support.ImprovedMergeSort; v\bWQs1  
import org.rut.util.algorithm.support.ImprovedQuickSort; axmq/8X  
import org.rut.util.algorithm.support.InsertSort; l4T[x|')M  
import org.rut.util.algorithm.support.MergeSort; `#iL'ND[  
import org.rut.util.algorithm.support.QuickSort; `=pA;R9  
import org.rut.util.algorithm.support.SelectionSort; .Bkfe{^  
import org.rut.util.algorithm.support.ShellSort; 1.@{5f3T  
`Eg X#  
/** H2|'JA#v  
* @author treeroot x7 e0&  
* @since 2006-2-2 F^{31iU~CX  
* @version 1.0 zf)*W#+  
*/ 4r_*: $g  
public class SortUtil { '2Zs15)V  
public final static int INSERT = 1; T\Xf0|y  
public final static int BUBBLE = 2; #xx.yn(7  
public final static int SELECTION = 3; T\.~!Q  
public final static int SHELL = 4; +fY@q ,`  
public final static int QUICK = 5; Kh4rl)L*+%  
public final static int IMPROVED_QUICK = 6; #@-dT,t  
public final static int MERGE = 7; $W}:,]hoj  
public final static int IMPROVED_MERGE = 8; JcYY*p  
public final static int HEAP = 9; dpE^BWv3  
~Qif-|[V  
public static void sort(int[] data) { Kn$t_7AF^  
sort(data, IMPROVED_QUICK); ?`Z:vqp>Z  
} bn|HvLQ"1  
private static String[] name={ M^\`~{*T  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6?5dGYAX<  
}; 6H2Bf*i  
-}4CY\d6'  
private static Sort[] impl=new Sort[]{ H[: lQ\  
new InsertSort(), ,#BD/dF  
new BubbleSort(), sK W~+ ]  
new SelectionSort(), {9;-5@b  
new ShellSort(), tkm@&e=e%  
new QuickSort(), E3p$^['vx  
new ImprovedQuickSort(), whe%o  
new MergeSort(), lE%KzX?&  
new ImprovedMergeSort(), v B~VJKD  
new HeapSort() !oi {8X@  
}; 9ec?L  
ye(av&Hn  
public static String toString(int algorithm){ %VB4/~ "  
return name[algorithm-1]; Ys_L GfK  
} o1\N)%  
19[oXyFI  
public static void sort(int[] data, int algorithm) { , 0X J|#%  
impl[algorithm-1].sort(data); +MHIZI  
} .nEMd/pX  
Ar~<l2,{r  
public static interface Sort { d]K8*a%[-  
public void sort(int[] data); ,Gbc4x  
} Ha]vG@?+  
416}# Mk  
public static void swap(int[] data, int i, int j) { #k/T\PQ0s  
int temp = data; }LS.bQKqi,  
data = data[j]; ?`Mk$Y%my  
data[j] = temp; |Wck-+}U  
} ,_V/W'  
} z@ZI$.w  
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