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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。 /axIIfx-  
插入排序: hs tbz  
?wnzTbJN  
package org.rut.util.algorithm.support; ~ek$C  
v3v[[96p  
import org.rut.util.algorithm.SortUtil; &\apwD  
/** k)TSR5A  
* @author treeroot A:7k+4  
* @since 2006-2-2 gJ2>(k03y  
* @version 1.0 x\Z'2?u}  
*/ R(n^)^?  
public class InsertSort implements SortUtil.Sort{ ^pJ!isuqu  
o] mD"3_  
/* (non-Javadoc) :n /@z4#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gY@N~'f;"  
*/ f4L`.~b'hb  
public void sort(int[] data) { L#vI=GpL,r  
int temp; K_K5'2dE  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 5uxBK"q  
} e9Nk3Sj]  
} ID#I`}h.k  
} X/N0LU(q  
'Ysx=  
} 5Hcf;P7   
B" 3dQwQ  
冒泡排序: (PfqRk1Y  
i+gQE!  
package org.rut.util.algorithm.support; @xB*KyUW  
/="~gq@  
import org.rut.util.algorithm.SortUtil;  A^p[52`  
xhRngHU\z<  
/** wC5ee:u C%  
* @author treeroot b$Vz2Fzx  
* @since 2006-2-2 CZ nOui  
* @version 1.0 sP ls zC[  
*/ ~i`>adJ:  
public class BubbleSort implements SortUtil.Sort{ / ~^rr f  
92^w8Z.  
/* (non-Javadoc) Me=CSQqf<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;pnD0bH  
*/ ,Jd ',>3  
public void sort(int[] data) { 9'r:~ O  
int temp; cq$i  
for(int i=0;i for(int j=data.length-1;j>i;j--){ rD*sl}  
if(data[j] SortUtil.swap(data,j,j-1); ?:w1je7  
} fJ ,1Ef;Z  
} .jj$Kh q]  
} F4K0) ;  
} # vry0i  
@'|)~,"bx  
} h(5P(`M  
3\Xbmq8}  
选择排序: 8cA~R-  
z`\F@pX%wC  
package org.rut.util.algorithm.support; $ibuWb"a  
{c (!;U  
import org.rut.util.algorithm.SortUtil; uV=Qp1~  
NOp609\^  
/** FXs*vg`  
* @author treeroot 7PkJ-JBA  
* @since 2006-2-2 {Lm~r+ U  
* @version 1.0 Z.M,NR  
*/ sq;s]@~  
public class SelectionSort implements SortUtil.Sort { /IsS;0K%L  
/RMPS. d {  
/* =MvjLh"s  
* (non-Javadoc) Pcw6!xH  
* f/V 2f].  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kS!viJwtT  
*/ Hbpqyl%O>  
public void sort(int[] data) { C?2' +K  
int temp; V<j.xd7  
for (int i = 0; i < data.length; i++) { d$ ^ ,bL2p  
int lowIndex = i; Yboiw y,n  
for (int j = data.length - 1; j > i; j--) { phgm0D7  
if (data[j] < data[lowIndex]) { x l#LrvxI  
lowIndex = j; CXC`sPY  
} 0D&t!$Ibf  
} APO>y  
SortUtil.swap(data,i,lowIndex); {\(L%\sV@  
} %%4t~XC#  
} |gU(s  
d.P\fPSD  
} qcN'e.A  
M`l.t -ut  
Shell排序: ]Ei0d8Uo  
>>5NX"{  
package org.rut.util.algorithm.support; IhA*"  
B~_d^`  
import org.rut.util.algorithm.SortUtil; r3\cp0P;s  
^Y iJV7  
/** AqV7\gdOC  
* @author treeroot dS<C@(  
* @since 2006-2-2 fF V!)Zj  
* @version 1.0 1Tm^  
*/ J52 o g4l  
public class ShellSort implements SortUtil.Sort{ jb^N|zb  
-]t,E,(!  
/* (non-Javadoc) r}jGUe}d  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sx8OhUyux  
*/ t>[KVVg W  
public void sort(int[] data) { .Fa4shNV  
for(int i=data.length/2;i>2;i/=2){ 4'LB7}WG  
for(int j=0;j insertSort(data,j,i); 3fh8$A  
} yfC^x%d7G  
} wV ^V]c?U  
insertSort(data,0,1); ]._LLSzWhg  
} 1)[]x9]^q'  
%C=]1Q=T)  
/** <,>P0tY}  
* @param data 3dRr/Ilc  
* @param j ''Cay0h  
* @param i ?A )hN8  
*/ `2PLWo  
private void insertSort(int[] data, int start, int inc) { #Z<a  
int temp; 1 %,a =,v  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); PK4iuU`vh  
} 6l4mS~/  
} \R3H+W  
} Co3:*nbRv  
T N!=@Gy  
} dH^<t,v  
QQV~?iW{~  
快速排序: xQ'2BAEa  
iT)z_  
package org.rut.util.algorithm.support; Y)}Rb6qGW  
;Yg{zhJX~  
import org.rut.util.algorithm.SortUtil; ZPD[5) ~  
bpxeznz  
/** NZ3/5%We/  
* @author treeroot gB4U*D0[e~  
* @since 2006-2-2 h)Ff2tX  
* @version 1.0 -k7X:!>QHC  
*/ =lVK IW  
public class QuickSort implements SortUtil.Sort{ 59Gk3frk(  
hsw9(D>jp  
/* (non-Javadoc) U2%.S&wS,e  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ck /F9(  
*/ ? mhs$g>  
public void sort(int[] data) { >N.]|\V  
quickSort(data,0,data.length-1); >(snII  
} nw6+.pOy  
private void quickSort(int[] data,int i,int j){ Y X_ gb/A  
int pivotIndex=(i+j)/2; +EAT:,  
file://swap O/!bG~\Y  
SortUtil.swap(data,pivotIndex,j); (X?/"lC)  
RTFZPq84  
int k=partition(data,i-1,j,data[j]); c?%(Dp E  
SortUtil.swap(data,k,j); >|Cw\^  
if((k-i)>1) quickSort(data,i,k-1); Zx d~c]n  
if((j-k)>1) quickSort(data,k+1,j); - > J_ ~  
T =2=k&|  
} DSj(]U~r  
/** ?SC[G-b  
* @param data 41_SRh7N  
* @param i T t>8?  
* @param j %G?;!Lz  
* @return &< !Ufa&  
*/ ts8+V<g  
private int partition(int[] data, int l, int r,int pivot) { CV{r5Sye  
do{ E!O\87[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Kn?lHH*w7  
SortUtil.swap(data,l,r); h)me\U7UC  
} SnYLdwgl  
while(l SortUtil.swap(data,l,r); 8Mbeg ,P  
return l; A%2:E^k(s  
} & V)6!,rb  
RO3oP1@B  
} C -?!S  
${8?N:>t  
改进后的快速排序: 4);)@&0Md~  
*;XWLd#  
package org.rut.util.algorithm.support; wlPx,UqZ  
|0,vQv  
import org.rut.util.algorithm.SortUtil; ^xZ e2@  
{bPV)RL:  
/** -`Y :~q1  
* @author treeroot ]0r|_)s  
* @since 2006-2-2 <vUVP\u~$  
* @version 1.0 h},oF!,  
*/ JO'>oFv_W  
public class ImprovedQuickSort implements SortUtil.Sort { >\!4Mk8  
emW:C-/h/@  
private static int MAX_STACK_SIZE=4096; eVl'\aUd  
private static int THRESHOLD=10; vs j3  
/* (non-Javadoc) AE@NOM7u  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ap$y%6  
*/ wdvLx  
public void sort(int[] data) { Y\=FLO9  
int[] stack=new int[MAX_STACK_SIZE]; "EV!>^Z  
Y[SU&LM  
int top=-1; RL[E X5U  
int pivot; ]/cd;u  
int pivotIndex,l,r; s9oO%e<  
|~<N -~.C  
stack[++top]=0; 0ji q-3V)  
stack[++top]=data.length-1; *U#m+@\0  
` rm?a0  
while(top>0){ j!z-)p8hy  
int j=stack[top--]; _#_ E^!  
int i=stack[top--]; C}5M;|%3)  
*xR 2)u  
pivotIndex=(i+j)/2; G9g6.8*&  
pivot=data[pivotIndex]; q/1Or;iK  
y]e>E  
SortUtil.swap(data,pivotIndex,j); j 6ut}Uq  
MP>n)!R[`  
file://partition 0D~ C 5}/4  
l=i-1; Wn|&cG9  
r=j; V,ZY*f0  
do{ s:y ^_W)d  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); #2xSyOrmf  
SortUtil.swap(data,l,r); XUV!C 7  
} rgcWRt  
while(l SortUtil.swap(data,l,r);  Zt E##p  
SortUtil.swap(data,l,j);  O3NWXe<  
SNT5Amz!  
if((l-i)>THRESHOLD){ $WW)bP d4^  
stack[++top]=i; ~2_lp^Y  
stack[++top]=l-1; qO`qJ/  
} 8X&Ya =  
if((j-l)>THRESHOLD){ v$w++3H  
stack[++top]=l+1; `xKFqx:e  
stack[++top]=j; 34|a:5c  
} ;9uRO*H?T  
,,=apyr#&  
} #< CIFVH  
file://new InsertSort().sort(data); #NRh\Wj|  
insertSort(data); X21dX`eMN  
} w>~M}Ahj  
/** o`r(`6@  
* @param data d @rs3Q1z  
*/ vi {uy  
private void insertSort(int[] data) { ?Hy+'sq[  
int temp; XY+y}D %  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); $R^lo $(  
} V{Q kN7-  
} 6/mF2&&g  
} (B`sQw@tu  
ulXnq`  
} P -Fg^tl  
E,*&BDW  
归并排序: LAZVW</  
IjZ@U%g@;  
package org.rut.util.algorithm.support; PJ 9%/Nrh  
g*-2* \  
import org.rut.util.algorithm.SortUtil; XizPMN5a  
.RRlUWu  
/** ^ @.G,u  
* @author treeroot m@ oUvxcd  
* @since 2006-2-2 `mB.pz[  
* @version 1.0 2@MN]Low  
*/ YU\Gj S~>&  
public class MergeSort implements SortUtil.Sort{ n,KA&)/s  
 *W^=XbG  
/* (non-Javadoc) ~b8a^6:R"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (K!4Kp^m  
*/ &=-PRza%j  
public void sort(int[] data) { 1!/-)1t  
int[] temp=new int[data.length]; a c6*v49  
mergeSort(data,temp,0,data.length-1); F";FG 0  
} #AncOo  
7c::Qf[|  
private void mergeSort(int[] data,int[] temp,int l,int r){ k|#Zy,  
int mid=(l+r)/2; aIu2>  
if(l==r) return ; B| Q6!  
mergeSort(data,temp,l,mid); ){tPP$-i=  
mergeSort(data,temp,mid+1,r); &|=?a cv  
for(int i=l;i<=r;i++){ k!13=Gh  
temp=data; v*L '{3f  
} $- w5o`e  
int i1=l; #`j][F@N  
int i2=mid+1; m"-G6BKS  
for(int cur=l;cur<=r;cur++){ GYqJ!,  
if(i1==mid+1) g8Aj `O  
data[cur]=temp[i2++]; (rMZ  
else if(i2>r) 1NGyaI  
data[cur]=temp[i1++]; !Mil?^  
else if(temp[i1] data[cur]=temp[i1++]; yiO31uQt  
else b_ JWnh  
data[cur]=temp[i2++]; bs:QG1*.  
} irmwc'n]  
} lWlUWhLnP  
5Jw"{V?Ak  
} l4Y1(  
k.{G&]r{  
改进后的归并排序: LT(?#)D  
u#VweXyU  
package org.rut.util.algorithm.support; Mz}i[|U\  
1g81S_T .  
import org.rut.util.algorithm.SortUtil; )rbc;{.  
N&N 82OG  
/** c 85O_J  
* @author treeroot 2 mq%|VG'  
* @since 2006-2-2 X}?ESjZJ  
* @version 1.0 uOb2npPj  
*/ dh?S[|='  
public class ImprovedMergeSort implements SortUtil.Sort { 8L{$v~+  
,0.|P`|w  
private static final int THRESHOLD = 10; 3z$HKG  
>&[3  
/* i&1U4q  
* (non-Javadoc) :SQ LfOQ  
* .&L^J&V  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W'd/dKU x  
*/ CHg]Ul  
public void sort(int[] data) { 9g4QVo|  
int[] temp=new int[data.length]; ,?fN#gc :  
mergeSort(data,temp,0,data.length-1); Kj=;>u  
} sD.6"w7}  
Q{8qm<0g  
private void mergeSort(int[] data, int[] temp, int l, int r) { CR.bMF}  
int i, j, k; oAC^4-Ld  
int mid = (l + r) / 2; $xQ"PJ2  
if (l == r) GU5W|bS  
return; :"y0oCu7`W  
if ((mid - l) >= THRESHOLD) B6(h7~0(<  
mergeSort(data, temp, l, mid); *|@+rbjVC  
else \N4d_ fPj  
insertSort(data, l, mid - l + 1); ,v|CombIc.  
if ((r - mid) > THRESHOLD) 7<fL[2-  
mergeSort(data, temp, mid + 1, r); exsQmbj* %  
else #fO*ROe  
insertSort(data, mid + 1, r - mid); 8>2&h  
HqB|SWyK  
for (i = l; i <= mid; i++) { z( *]'Y  
temp = data; +tPx0>p;  
} p|b+I"M  
for (j = 1; j <= r - mid; j++) { P4i3y{$V  
temp[r - j + 1] = data[j + mid]; ~@[(U!G  
} `B:B7Cpvn  
int a = temp[l]; _`slkw P.  
int b = temp[r]; #"|"cYi,  
for (i = l, j = r, k = l; k <= r; k++) { 4n#YDZ  
if (a < b) { _r~!O$2  
data[k] = temp[i++]; 5XI;<^n2  
a = temp;  4c  
} else { v/]Qq  
data[k] = temp[j--]; zoJ_=- *s  
b = temp[j]; Nvi Fq  
} 2%`^(\y  
} F\zkyk 4  
} z|Hy>|+  
nMTLD  
/** bcUC4g\9N  
* @param data >0kmRVd  
* @param l 83\ o (  
* @param i U? {'n#n 5  
*/ @][ a8:Y9I  
private void insertSort(int[] data, int start, int len) { M ' a&  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e 4 p*51ra  
} sM #!Xl;  
} hN Z4v/  
} x-w`KFS  
} R.91v4 J  
a v'd%LZP  
堆排序: S`ax*`  
i_[^s:*T  
package org.rut.util.algorithm.support; *?EO n-  
;% /6Y~/  
import org.rut.util.algorithm.SortUtil; x>U1t!'  
4 *Bp  
/** D?iy.Dg  
* @author treeroot j l;kcGE  
* @since 2006-2-2 >{phyByI  
* @version 1.0 "Czz,;0  
*/ #citwMW  
public class HeapSort implements SortUtil.Sort{ X_vI0YX9  
9 Q0#We*  
/* (non-Javadoc) Z}sG3p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N>uA|<b,  
*/ ~C}(\8g  
public void sort(int[] data) { f28gE7Y\a  
MaxHeap h=new MaxHeap(); 9\AEyaJFZ  
h.init(data); p2pTs&}S  
for(int i=0;i h.remove(); C1ZFA![  
System.arraycopy(h.queue,1,data,0,data.length); -&qRo0^3  
} 4]Un=?)I  
P@gu~!  
private static class MaxHeap{ Qh)|FQ[s$r  
w JapGc!   
void init(int[] data){ ^2&O3s  
this.queue=new int[data.length+1]; s[0prm5.  
for(int i=0;i queue[++size]=data; <7vIh0  
fixUp(size); Ma`   
} xTa4.ZXg  
} K $Mx}m7l  
^BF@j4*~  
private int size=0; #Pb7EL#c  
.fio<mqi  
private int[] queue; gp#bQ  
q#mFN/.(+  
public int get() { . 1{vpX  
return queue[1]; M9uH&CD6U  
} fl pXVtsQ  
zPX=MfF  
public void remove() { e.3sAUHZ-  
SortUtil.swap(queue,1,size--); ?:#>^eWYe7  
fixDown(1); )z ?&" I  
} %0ll4"  
file://fixdown `@u+u0  
private void fixDown(int k) { XPc9z}/(e  
int j; beN>5coP%A  
while ((j = k << 1) <= size) { SX Hru Z  
if (j < size %26amp;%26amp; queue[j] j++; b6LC$"t0  
if (queue[k]>queue[j]) file://不用交换 6T{o3wc;  
break; +WV_`Rx#  
SortUtil.swap(queue,j,k); wzNt c)~i  
k = j; 1cHSgpoJ  
} "6I-]:K-  
} T!=20!I  
private void fixUp(int k) { #VQGN2bK.  
while (k > 1) { =0@d|LeZ  
int j = k >> 1; 3]:p!Y`$  
if (queue[j]>queue[k]) g|GvJ)VX  
break; c{]r{FAx9o  
SortUtil.swap(queue,j,k); l ))~&  
k = j; x8SM,2ud  
} :oon}_MdRd  
} vUo.BA#;.b  
2-c U -i4  
} `aO@N(  
j &0fC!k  
} N:PA/V^z  
V(' 'p{  
SortUtil: '1kj:Np  
+AgkPMy  
package org.rut.util.algorithm; <u x*r#a!d  
Fl#VKU3h  
import org.rut.util.algorithm.support.BubbleSort; ?|Q5]rhs  
import org.rut.util.algorithm.support.HeapSort; 'sjJSc  
import org.rut.util.algorithm.support.ImprovedMergeSort; Pw^c2TQ  
import org.rut.util.algorithm.support.ImprovedQuickSort; Zs3]|bUR  
import org.rut.util.algorithm.support.InsertSort; %_j?<h&  
import org.rut.util.algorithm.support.MergeSort; 7&RJDa:a7T  
import org.rut.util.algorithm.support.QuickSort; o $HJg  
import org.rut.util.algorithm.support.SelectionSort; mP5d!+[8  
import org.rut.util.algorithm.support.ShellSort; Sf4h!ly  
aoakTi!}  
/** 08K.\3  
* @author treeroot V'.eesN  
* @since 2006-2-2 yqVaA 'w5  
* @version 1.0 <R`,zE@t'(  
*/  +,F= -  
public class SortUtil { iu6WGm R  
public final static int INSERT = 1; Wf`Oye Rz  
public final static int BUBBLE = 2; #*>7X>,J  
public final static int SELECTION = 3; ?%za:{  
public final static int SHELL = 4; z)<pqN  
public final static int QUICK = 5; !s[j1=y  
public final static int IMPROVED_QUICK = 6; Kz3h]/A.  
public final static int MERGE = 7; Y9H *S*n  
public final static int IMPROVED_MERGE = 8; MMxoKL  
public final static int HEAP = 9; O%++0k;  
ZoNNM4M+  
public static void sort(int[] data) { dl7p1Cr  
sort(data, IMPROVED_QUICK); &;@b&p+  
} ".Deu|>  
private static String[] name={ &PQ{e8w  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J\dhi{0  
}; K}5 $;W#  
4}_w4@(  
private static Sort[] impl=new Sort[]{ xBI"{nGoN  
new InsertSort(), Y^*$PED?  
new BubbleSort(), "za*$DU  
new SelectionSort(), ?j4,^K3  
new ShellSort(), e2h k  
new QuickSort(), / =Uv  
new ImprovedQuickSort(), c;~Llj P  
new MergeSort(), ^%*{:0'  
new ImprovedMergeSort(), %wjU^Urya  
new HeapSort() /wxxcq  
}; {R{%Z  
IwgA A)H  
public static String toString(int algorithm){ (27F   
return name[algorithm-1]; CIik@O*  
} Y'a(J7  
f s"V'E2a  
public static void sort(int[] data, int algorithm) { 1d@^,7MF-  
impl[algorithm-1].sort(data); %{VI-CQ  
} yY g&'3  
OB  i!fLa  
public static interface Sort { @ H`QLm  
public void sort(int[] data); R?9Plzt5  
} 8^"|-~#<  
36Z`.E>~L  
public static void swap(int[] data, int i, int j) { 9B;Sk]y  
int temp = data; AO7qs:+  
data = data[j]; JK8@J9(#  
data[j] = temp; <$3nD b-  
} V_d%g<n4  
} W%XS0k}x  
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