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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。 Vb|;@*=R&Q  
插入排序: E"ju<q/Q  
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package org.rut.util.algorithm.support; j8@ Eqh  
RU>Hr5ebo  
import org.rut.util.algorithm.SortUtil; p_!;N^y.  
/** O<3i6   
* @author treeroot 8:Yha4<Bv7  
* @since 2006-2-2 $9 GRAM.  
* @version 1.0 5XO eYO{  
*/ ,"U8Fgf[r  
public class InsertSort implements SortUtil.Sort{ !/4f/g4Ze  
)"  H$1  
/* (non-Javadoc) 8^fkY'x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b P>!&s_  
*/ ;T0Y= yC  
public void sort(int[] data) { #;bpxz1lR9  
int temp; v1hrRf2<  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); #4(/#K 1j  
} {~*aXu 3  
} LEM{$Fxo&  
} K)2ZH@  
:@PM+[B|Q  
} {}?;|&_  
0A%>'<  
冒泡排序: (fgX!G[W  
O_*(:Z  
package org.rut.util.algorithm.support; )z0qKb \  
Rn O%8Hk  
import org.rut.util.algorithm.SortUtil; =d/\8\4  
(wmMHo|  
/** X\SZ Q[gN  
* @author treeroot M\wIpRD,  
* @since 2006-2-2 xCH,d:n=  
* @version 1.0 1y5]+GU'`  
*/ iSTr;>A  
public class BubbleSort implements SortUtil.Sort{ QK0  
Vp $]  
/* (non-Javadoc) *|n::9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }i1p &EN^  
*/ [/#c9RA  
public void sort(int[] data) { GyV3]Qqj  
int temp; !F0MLvdX7^  
for(int i=0;i for(int j=data.length-1;j>i;j--){ g-=)RIwm  
if(data[j] SortUtil.swap(data,j,j-1); tt=?*n  
} H'myd=*h~8  
} ?iH`-SY  
} ,jWMJ0X/N=  
} i/rdPbq  
/#Y)nyE  
} M.K-)r,  
73/kyu-0%  
选择排序: s)$N&0\  
-Iz&/u*}f  
package org.rut.util.algorithm.support; U;n$  
7%Zl^c>q  
import org.rut.util.algorithm.SortUtil; T>(nc"(  
`d#l o  
/** ?45kN=%*s  
* @author treeroot [>"bL$tlo*  
* @since 2006-2-2 6JWCB9$4  
* @version 1.0 $AAv%v  
*/ <{7CS=)  
public class SelectionSort implements SortUtil.Sort { i^9PiP|U  
v}hmI']yf  
/* (yFR;5Fo  
* (non-Javadoc) PMk3b3)Z  
* .s 31D%N  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CW k#Amt.  
*/ .3Nd[+[  
public void sort(int[] data) { )r v5QH`i  
int temp; )SZt If  
for (int i = 0; i < data.length; i++) { - |mWi  
int lowIndex = i; ~ \tI9L?|A  
for (int j = data.length - 1; j > i; j--) { *D ld?Q  
if (data[j] < data[lowIndex]) { f[3DKA  
lowIndex = j; ]!J 6S.@#+  
} @SA*7[?P  
} OKfJ  
SortUtil.swap(data,i,lowIndex); 8~?3: IZ  
} !oeu  
} 4 vwa/?  
orn9;|8q  
} oxE'u<  
;crQ7}k  
Shell排序: $x5P5^Y  
n(.y_NEgV!  
package org.rut.util.algorithm.support; 2wE?O^J  
]]{$X_0n  
import org.rut.util.algorithm.SortUtil; i(9=` A}  
e&f9/rfx  
/** ~lMw*Qw^  
* @author treeroot _aVrQ@9  
* @since 2006-2-2 F)/}Q[o8  
* @version 1.0 @-bX[}.  
*/ E4RvVfA0F  
public class ShellSort implements SortUtil.Sort{ C.V")D=  
zyTP|SXk  
/* (non-Javadoc) pN/)$6=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M}NmA  
*/ 0!F"s>(H  
public void sort(int[] data) { y0qrl4S)v  
for(int i=data.length/2;i>2;i/=2){ brJ _q0@  
for(int j=0;j insertSort(data,j,i); O(;K ]8  
} Ed9ynJ~)X  
} W HO;;j  
insertSort(data,0,1); > 4ex:Z  
} b7g\wnV8z  
([zt}uf  
/** MZf$8R  
* @param data XnrOC|P$  
* @param j D/jB .  
* @param i ?P[uf  
*/ _f$8{&`k  
private void insertSort(int[] data, int start, int inc) { vJDK]p<}  
int temp; obRR))  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); U>6MT@\  
} {4Y@ DQ-  
} `O(ec  
} :G9+-z{Y&  
\]}|m<R  
} Zh`lC1l'  
~\`lbGJ7?  
快速排序: y0>asl  
^RytBwzKM  
package org.rut.util.algorithm.support; . $uvQpyh  
o^;$-O!/  
import org.rut.util.algorithm.SortUtil; ;T~]|#T\6  
|cStN[97%  
/** #}L75  
* @author treeroot 6 ]W!>jDc  
* @since 2006-2-2 |n=m{JX\m  
* @version 1.0 L<!}!v5ja  
*/ ZB GLwe  
public class QuickSort implements SortUtil.Sort{ C J S  
)ALPMmlRs  
/* (non-Javadoc) pkpD1c^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <m9hM?^q  
*/ SV16]Vc  
public void sort(int[] data) { j*>+^g\Q6  
quickSort(data,0,data.length-1); 3}=r.\]U  
} :S}!i?n  
private void quickSort(int[] data,int i,int j){ 0F-X.Dq  
int pivotIndex=(i+j)/2; RvKP&  
file://swap $A"kHS7T  
SortUtil.swap(data,pivotIndex,j); ?D-1xnxep  
duB{ 1  
int k=partition(data,i-1,j,data[j]); !/+ZKx("9  
SortUtil.swap(data,k,j); i`/_^Fndyu  
if((k-i)>1) quickSort(data,i,k-1); <uUQ-]QOIh  
if((j-k)>1) quickSort(data,k+1,j); l CHaRR7  
90> (`pI=  
} 3^ ~M7=k  
/** By{zX,6'  
* @param data Vrn. #d  
* @param i D"0:n.  
* @param j W)3?T& `  
* @return *LpEH,J  
*/ 6s\niro2  
private int partition(int[] data, int l, int r,int pivot) { BDSZ'  
do{ }# 'wy  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); zbK=yOIOd  
SortUtil.swap(data,l,r); /^^t>L  
} Gm;)Om_  
while(l SortUtil.swap(data,l,r); o&P}GcEIw  
return l; SLp &_S@4  
} P'f =r%  
p3ox%4  
} 1S9(Zn[2,  
"a))TV%N  
改进后的快速排序: 1oD,E!+^d  
|niYN7 17  
package org.rut.util.algorithm.support; B*7Y5_N  
xgHR;US H  
import org.rut.util.algorithm.SortUtil; c7 Sa|9*dR  
j78WPG  
/** 3~Od2nk(x  
* @author treeroot uc!j`G*]  
* @since 2006-2-2 V(_OyxeC{2  
* @version 1.0 `s5<PCq  
*/ X.hU23w  
public class ImprovedQuickSort implements SortUtil.Sort { H,`F%G#!`q  
u~n*P``{  
private static int MAX_STACK_SIZE=4096; P' .MwS  
private static int THRESHOLD=10; i'9aQi"G  
/* (non-Javadoc) DhZuQpH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VZo[\sWf  
*/ k#Qav1_  
public void sort(int[] data) { bA}9He1  
int[] stack=new int[MAX_STACK_SIZE]; OE' ?3S  
u(l[~r>8W;  
int top=-1; Y,Dd} an  
int pivot; I^"ou M9}Q  
int pivotIndex,l,r; }a?PB o`  
85CH% I#  
stack[++top]=0; li'h&!|]  
stack[++top]=data.length-1; ~_opU(;f  
MuXp*s3[  
while(top>0){ cb!mV5M-g  
int j=stack[top--]; FJ0Ity4u6  
int i=stack[top--]; gU\pP,a  
gY\X?  
pivotIndex=(i+j)/2; u3 k%  
pivot=data[pivotIndex]; ]j> W9n?  
hkV;(Fr&z  
SortUtil.swap(data,pivotIndex,j); {hQ0=rv<  
XN9s!5A<L)  
file://partition Y~\71QE>  
l=i-1; :T^!<W4  
r=j; HT&CbEa4'  
do{ <=.0 P/N  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Pyh+HD\  
SortUtil.swap(data,l,r); m,}0p  
} < kyT{[e+6  
while(l SortUtil.swap(data,l,r); d 90  
SortUtil.swap(data,l,j); 3FRz&FS:j  
p3>(ZWPNV  
if((l-i)>THRESHOLD){ n%'M?o]DF  
stack[++top]=i; D.d(D:  
stack[++top]=l-1; _M'WTe  
} kFKc9}7W  
if((j-l)>THRESHOLD){ Mo?eVtZ  
stack[++top]=l+1; I5]=\k($  
stack[++top]=j; <vMna< /d  
} K$v SdpC  
*D`]7I~}  
} tLCu7%P>  
file://new InsertSort().sort(data); O~ a`T  
insertSort(data); yg({g "  
} m$<LO%<~p  
/** HYVSi3[  
* @param data \:]  
*/  x{K^u"  
private void insertSort(int[] data) { "XPBNv\>_  
int temp; $VEG1]/svp  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); _|<kKfd?  
} l-s%3E3  
} cs[_TJo  
} VB>KT(n-b  
Q{%2Npvq  
} eu=G[>  
1 & G0;  
归并排序: vBy t_X  
=&+]>g{T  
package org.rut.util.algorithm.support; 5)h#NkA\J  
V{!fag  
import org.rut.util.algorithm.SortUtil; MTBHFjXO  
,TeJx+z^  
/** LX<arHz  
* @author treeroot 590.mCm  
* @since 2006-2-2 3On IAk3  
* @version 1.0 m]H[$ Q  
*/ (al.7VA;9  
public class MergeSort implements SortUtil.Sort{ c:#<g/-{wM  
1{6BU!  
/* (non-Javadoc) N:R6 b5 =}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =^liong0  
*/ .CJQ]ECl7p  
public void sort(int[] data) { Xae0xs  
int[] temp=new int[data.length]; qHwHP 1  
mergeSort(data,temp,0,data.length-1); 'ec G:B`S  
} 5zk<s`h  
E :gS*tsY  
private void mergeSort(int[] data,int[] temp,int l,int r){ w+A:]SU  
int mid=(l+r)/2; %v}SJEXF p  
if(l==r) return ; 0e./yPTT  
mergeSort(data,temp,l,mid); 2_S%vA<L  
mergeSort(data,temp,mid+1,r); 2MT_5j5[N  
for(int i=l;i<=r;i++){ Q` ?+w+y7  
temp=data; x"g-okLN  
} BdW Rm=  
int i1=l; ~nit~ ;  
int i2=mid+1; `As| MYv  
for(int cur=l;cur<=r;cur++){ D$ X9xtT  
if(i1==mid+1) :LE0_ .  
data[cur]=temp[i2++]; lKVy{X 3]*  
else if(i2>r) s*'L^>iZ  
data[cur]=temp[i1++]; ~kDR9s7  
else if(temp[i1] data[cur]=temp[i1++]; |gXtP-  
else E lf '1  
data[cur]=temp[i2++]; +IS+!K0?)  
} )-qWcf?   
} oZM6%-@qi  
-Iq W@|N  
} ~bm VpoI  
jM <=>P  
改进后的归并排序: /"~ D(bw0=  
PK&3nXF%4  
package org.rut.util.algorithm.support; C\-Abq c  
By3y.}'Ub9  
import org.rut.util.algorithm.SortUtil; L >* F8|g  
+SM&_b  
/** M't~/&D#  
* @author treeroot |X}H&wBWo  
* @since 2006-2-2 l'yX_`*Iq  
* @version 1.0 :+ASZE.  
*/ ^pI&f{q  
public class ImprovedMergeSort implements SortUtil.Sort { v?AQ&'Fk  
@B.;V=8wJ  
private static final int THRESHOLD = 10; qcN{p7=0  
^oZz,q  
/* s,5SWdb\v  
* (non-Javadoc) gK&MdF*  
* FI.Ae/(U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z>897>  
*/ ` u|8WK:  
public void sort(int[] data) { CsJ38]=Mt  
int[] temp=new int[data.length]; 6CQ.>M:R  
mergeSort(data,temp,0,data.length-1); $5(_U  
} -|1H-[Y(  
2/*F}w/  
private void mergeSort(int[] data, int[] temp, int l, int r) { |6qxRWT"  
int i, j, k; I JPpF`  
int mid = (l + r) / 2; =O~ J  
if (l == r) sObH#/l`  
return; M lv  
if ((mid - l) >= THRESHOLD) KOQiX?'  
mergeSort(data, temp, l, mid); 1\'?.  
else R1!F mZW8  
insertSort(data, l, mid - l + 1); C]X:@^Hy  
if ((r - mid) > THRESHOLD) ^A&i$RRO  
mergeSort(data, temp, mid + 1, r); jwP}{mi*  
else ;q=0NtCS=4  
insertSort(data, mid + 1, r - mid); ^[UWG^d  
$q"/q*ys  
for (i = l; i <= mid; i++) { B #[UR Z9S  
temp = data; ~RdD6V  
} |3Fo4K%+  
for (j = 1; j <= r - mid; j++) { Mz?xvP?z  
temp[r - j + 1] = data[j + mid]; fG *1A\t]  
} P4\{be>e  
int a = temp[l]; "PFczoRZ  
int b = temp[r]; E?VPCx  
for (i = l, j = r, k = l; k <= r; k++) { | c:E)S\  
if (a < b) { R04%;p:k#  
data[k] = temp[i++]; k!&G ;6O-  
a = temp; |igr3p5Fw  
} else { PIZnzZ@Z;  
data[k] = temp[j--]; bCV3h3<  
b = temp[j]; TO(2n8'fdO  
} MC 8t"SB  
} 5} v(Ks>  
} 'ycr/E&m{  
dkHye>  
/** ?&ow:OH+  
* @param data (31ia"i%  
* @param l c `[,>  
* @param i V6c>1nZ  
*/ a {4Wg:  
private void insertSort(int[] data, int start, int len) { 9s#Q[\B!  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^#6"d+lp  
} AZj `o  
} d9j+==S <  
} J|O=w(  
} -\6";_Y  
 |UudP?E  
堆排序: O#}d!}SIp  
[N35.O6P6u  
package org.rut.util.algorithm.support; 5s5GBJ?  
5l(8{,NDt  
import org.rut.util.algorithm.SortUtil; AQUl:0!  
"8.to=Lx  
/** _f"HUKGN  
* @author treeroot P#8+GN+bF  
* @since 2006-2-2 aEO``W  
* @version 1.0 QNN*/n  
*/ 3?}\Hw  
public class HeapSort implements SortUtil.Sort{ ?g ~w6|U(r  
v$WH#;(\  
/* (non-Javadoc) 8\AyKw  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %OV)O-  
*/ jX9{Ki"  
public void sort(int[] data) { g9T9TQ-O  
MaxHeap h=new MaxHeap(); +#B4Z'nT  
h.init(data); 1X ?9Ji)h  
for(int i=0;i h.remove(); m'!smS x8  
System.arraycopy(h.queue,1,data,0,data.length); *mvDh9v  
} cC4 2b2+  
GlVb |O"  
private static class MaxHeap{ /LH# 3  
@Sik~Mm_h  
void init(int[] data){ y ~PW_,  
this.queue=new int[data.length+1]; 3d1$w  
for(int i=0;i queue[++size]=data; =do*(  
fixUp(size); HsF8$C$z  
} ! R b  
} ~x(1g;!^  
p aQ"[w  
private int size=0; b}f#[* Z  
j O-H 1@;  
private int[] queue; J~e%EjN5e  
/'[m6zm]  
public int get() { w[K!m.p,u  
return queue[1]; C;m,{MD  
} 9<" .1  
(t.OqgY  
public void remove() { 2\b 2W_  
SortUtil.swap(queue,1,size--); x;F^7c1  
fixDown(1); B#A .-nb  
} ?Nbc#0pb7  
file://fixdown >~%EB?8  
private void fixDown(int k) {  Y ,  
int j; 1#Ls4+]5  
while ((j = k << 1) <= size) { 03%`ouf  
if (j < size %26amp;%26amp; queue[j] j++; 7])cu>/  
if (queue[k]>queue[j]) file://不用交换 J2KULXF  
break; Lddk:u&J  
SortUtil.swap(queue,j,k); - &7\do<  
k = j; t+H=%{z  
} \{GBaMwG~  
} v M lT  
private void fixUp(int k) { g?9IS,Gp  
while (k > 1) { . `ND  
int j = k >> 1; QE#Ar8tU  
if (queue[j]>queue[k]) +WH|nV~lQ  
break; #W]4aZ1  
SortUtil.swap(queue,j,k); #A:+|{H"  
k = j; ]N& Y25oT5  
} #GlQwk3  
} e@`"V,i  
ZCcKY6b  
} sOf;I]E|  
1DTA Dh0  
} id" -eMwp  
w,s++bV;L  
SortUtil: +L]$M)*0&  
TV['"'D&i  
package org.rut.util.algorithm; @[2Go}VF  
QAk.~ ob  
import org.rut.util.algorithm.support.BubbleSort; p`PBPlUn  
import org.rut.util.algorithm.support.HeapSort; 6Hh\ys  
import org.rut.util.algorithm.support.ImprovedMergeSort; R.Uwf  
import org.rut.util.algorithm.support.ImprovedQuickSort; Q4[^JQsR2  
import org.rut.util.algorithm.support.InsertSort; Y30T>5  
import org.rut.util.algorithm.support.MergeSort; #+Pk_?  
import org.rut.util.algorithm.support.QuickSort; O} &%R:  
import org.rut.util.algorithm.support.SelectionSort; eM) I%  
import org.rut.util.algorithm.support.ShellSort; v90)G8|q  
C&1()U  
/** }JWLm.e  
* @author treeroot %x]8^vze  
* @since 2006-2-2 h{5K9$9=  
* @version 1.0 h,!#YG@>  
*/ f6*6*=  
public class SortUtil { 1FPt%{s3  
public final static int INSERT = 1; C||9u}Q<  
public final static int BUBBLE = 2; Hf#VW^  
public final static int SELECTION = 3; 6F)^8s02h  
public final static int SHELL = 4; $GI jWlAh  
public final static int QUICK = 5; Pw :{  
public final static int IMPROVED_QUICK = 6; g,YJh(|#{  
public final static int MERGE = 7; T`7HQf ;  
public final static int IMPROVED_MERGE = 8; oRALhaI  
public final static int HEAP = 9; 70MSP;^  
?6#F9\  
public static void sort(int[] data) { ~CRd0T[^  
sort(data, IMPROVED_QUICK); PL}c1Ud  
} W74Y.zQ  
private static String[] name={ }}Kj b  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P\nz;}nv  
}; h;lg^zlTb  
"{@Q..hxC  
private static Sort[] impl=new Sort[]{ ) u(Gf*t  
new InsertSort(), 5L!cS+QNU  
new BubbleSort(), nl\l7/}6  
new SelectionSort(), je[1>\3W  
new ShellSort(), e*Gt%'  
new QuickSort(), GI ;  
new ImprovedQuickSort(), xis],.N  
new MergeSort(), AY B~{  
new ImprovedMergeSort(), /E32^o|,>  
new HeapSort() *%#Sa~iPo  
}; $-Yq?:  
q-lejVS(g  
public static String toString(int algorithm){ ?r}'0dW  
return name[algorithm-1]; Ob~7r*q  
} bZKlQ<sI  
6]D%|R,Q#}  
public static void sort(int[] data, int algorithm) { h@H8oZ[  
impl[algorithm-1].sort(data); IHs^t/;Iv  
} |ler\"Eu  
f7y3BWOi]  
public static interface Sort { @L/p  
public void sort(int[] data); brpsZU  
} ;&2f{  
&$V&gAN  
public static void swap(int[] data, int i, int j) { ;J&p17~T9  
int temp = data; #=81`u  
data = data[j]; EG&97l b  
data[j] = temp; )/{zTg8$?/  
} =U- w!uW  
} zcrM3`Zh  
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