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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。 >(3 y(1;  
插入排序: W+QI D/  
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package org.rut.util.algorithm.support; BsJClKp/  
gY%-0@g  
import org.rut.util.algorithm.SortUtil; b{A#P?  
/** k@?<Aw8 _X  
* @author treeroot EB \\ F  
* @since 2006-2-2 sS._N@f  
* @version 1.0 .m .v$(  
*/ +U[A.^t  
public class InsertSort implements SortUtil.Sort{ c5JxKU_  
|.YL 2\  
/* (non-Javadoc) .k}h'nE  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K#>B'>A\  
*/ N)QW$iw9  
public void sort(int[] data) { v''$qMQ)  
int temp; cG.4%Va@s_  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); N*eZ4s'  
} 8IO4>CMkv  
} '2eggX%  
} 2vynz,^ET  
 0y?bwxkc  
} ct`89~"  
C&\#{m_1B  
冒泡排序: Au9Rr3n  
<%! EI@N  
package org.rut.util.algorithm.support; 8/k* "^3  
LqNsQu";  
import org.rut.util.algorithm.SortUtil; 4h-tR  
W^k95%zBM  
/** ^VOFkUp)  
* @author treeroot 1 8%+ Hy=  
* @since 2006-2-2 W[/Txc0$  
* @version 1.0 F$M^}vsjGx  
*/ ^,}1^?*  
public class BubbleSort implements SortUtil.Sort{ IK1'" S|  
X lLG/N  
/* (non-Javadoc) AT%6K.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \(_(pcl  
*/ MQ#k`b#()  
public void sort(int[] data) { &n9&k Em  
int temp; 2DU Y4Ti  
for(int i=0;i for(int j=data.length-1;j>i;j--){ KrdEB0qh  
if(data[j] SortUtil.swap(data,j,j-1); s@zO`uBc  
} ,R. rxoO  
} 9A~w2z\G  
} H-\Ym}BGu  
} GXG 7P,p,  
1J([*)  
} #lR-?Uh  
,.Lwtp,n  
选择排序: ~[%_]/#&%z  
`*6|2  
package org.rut.util.algorithm.support; 9 ,:#Q<UM  
Q3Pu<j}Y  
import org.rut.util.algorithm.SortUtil; G9NI`]k  
-0UR%R7q  
/** 793 15A  
* @author treeroot ?h6|N%U'  
* @since 2006-2-2 WW+xU0  
* @version 1.0 T:u>7?8o  
*/ PJiU2Y33  
public class SelectionSort implements SortUtil.Sort { \o}T0YX  
`Jk0jj6Z  
/* kV+^1@"  
* (non-Javadoc) )O"E#%  
* -Y@tx fu-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]o8]b7-  
*/ wn.~Dx  
public void sort(int[] data) { `0\Z*^>  
int temp; Ez;Qo8  
for (int i = 0; i < data.length; i++) { (B>/LsTu  
int lowIndex = i; kzKej"a;  
for (int j = data.length - 1; j > i; j--) { [K&%l]P7  
if (data[j] < data[lowIndex]) { SK lvZ  
lowIndex = j; W w,\s5Uw  
} _;B wP  
} -T,?'J0 2  
SortUtil.swap(data,i,lowIndex); !\X9$4po@  
} R3~,&ab  
} )GkJ%o#H2  
H:@hCO[a  
} "iA0hA  
#7 3pryXV  
Shell排序: 6N#hN)/  
`Gqe]ZE#"  
package org.rut.util.algorithm.support; ^+SE_-+]  
WeM38&dWY  
import org.rut.util.algorithm.SortUtil; j{%;n40$  
=#2c r:1  
/** ,X.[37  
* @author treeroot S"cTi[9  
* @since 2006-2-2 lI<jYd 0fZ  
* @version 1.0 Nap[=[rv  
*/ }|.<EkA  
public class ShellSort implements SortUtil.Sort{ &BRk<iwV  
wtw=RA  
/* (non-Javadoc) `,qft[1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4j#y?^s  
*/ l~i?  
public void sort(int[] data) { dHy9 wU  
for(int i=data.length/2;i>2;i/=2){ Az&>.*  
for(int j=0;j insertSort(data,j,i); Q;]JVT1  
} {DRk{>K,  
} PVIOe}N  
insertSort(data,0,1); Fi/iA%,  
} wZ(1\ M(  
EhxpMTS  
/** "`>6M&`U  
* @param data aJ'Fn  
* @param j k+J%o%* <  
* @param i MgXZN{  
*/ AY /9Io-  
private void insertSort(int[] data, int start, int inc) { "w:h  
int temp; ?()*"+N(ck  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); dKzG,/1W[m  
} w?ugZYwX*  
} //&3{B  
} ?MH=8Cl1w  
$MR1 *_\V  
} % !@E)%d0  
B ~v6_x  
快速排序: :Qa*-)rs  
W>jKWi,{  
package org.rut.util.algorithm.support; d:'{h"M6  
 .\oz  
import org.rut.util.algorithm.SortUtil; nE]rPRU}[  
mZiKA-t  
/** ef'kG"1  
* @author treeroot #ft9ms#N  
* @since 2006-2-2 PJK:LZw  
* @version 1.0 pLu5x<  
*/ z?DCQ  
public class QuickSort implements SortUtil.Sort{ LuZlGm  
'd N1~Pa  
/* (non-Javadoc) CzlG#?kU?2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \`y:#N<c  
*/ ? l~qb]._  
public void sort(int[] data) { ^|<>`i6  
quickSort(data,0,data.length-1); d./R;Z- I{  
} +&\. ]Pp  
private void quickSort(int[] data,int i,int j){ 6 |=]i-8  
int pivotIndex=(i+j)/2; f}yRTR GJv  
file://swap Xm# +Z`|N  
SortUtil.swap(data,pivotIndex,j); (&.T  
|dxWO  
int k=partition(data,i-1,j,data[j]); g{Av =66Z  
SortUtil.swap(data,k,j); )"?'~5A  
if((k-i)>1) quickSort(data,i,k-1); s/ABT.ZO  
if((j-k)>1) quickSort(data,k+1,j); fln[Q2zl  
%<^^ Mw  
} #|T"6jJaQ  
/** A,&711Y  
* @param data '`;=d<'  
* @param i 3rK\ f4'  
* @param j Y-8BL  
* @return ^P{y^@XI  
*/ Zb_A(mnzh  
private int partition(int[] data, int l, int r,int pivot) { |*48J1:1y  
do{ ?<F([(  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); >-V632(/{o  
SortUtil.swap(data,l,r); aA$\iFYA  
} +\["HS7+'0  
while(l SortUtil.swap(data,l,r); /*;a6S8q  
return l; Zrwd  
} 0Sk~m4fj(  
)a0l:jEOc  
}  #*rJI3  
ie[X7$@  
改进后的快速排序: )n"0:"Ou  
2ZV; GS#  
package org.rut.util.algorithm.support; s#<fj#S  
/JRZ?/<1  
import org.rut.util.algorithm.SortUtil; vn*K\,  
W%5))R$  
/** OYxYlUq  
* @author treeroot wEq&O|Vj  
* @since 2006-2-2 )?OdD7gd  
* @version 1.0 J<H]vs  
*/ $,O8SW.O$  
public class ImprovedQuickSort implements SortUtil.Sort { IR]5,K^l  
g||EjCsp  
private static int MAX_STACK_SIZE=4096; c2Z !Vtd  
private static int THRESHOLD=10; I9L3Y@(f6m  
/* (non-Javadoc) |AE{rvP{@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %Iflf]l  
*/ z&n2JpLY7  
public void sort(int[] data) { iku*\,6W  
int[] stack=new int[MAX_STACK_SIZE]; [?:MIl#!  
'_7rooU9  
int top=-1; @1xVWSF  
int pivot; EKcPJ\7  
int pivotIndex,l,r; &+(D< U  
lijT L-3  
stack[++top]=0; :zo5`[P  
stack[++top]=data.length-1; xx1lEcj  
55ec23m  
while(top>0){ y@$E5sz  
int j=stack[top--]; |xZu?)M4  
int i=stack[top--]; tA4Ra,-c  
^S;{;c+'  
pivotIndex=(i+j)/2; V,VL?J\  
pivot=data[pivotIndex]; (x/:j*`K  
451.VI}MR  
SortUtil.swap(data,pivotIndex,j); QsxvA;7%  
6 %aaK|0  
file://partition S?`0,F  
l=i-1; Z2g<"M  
r=j; aY,Bt  
do{ \ ;]{`  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); \reVA$M [  
SortUtil.swap(data,l,r); V.$tq  
} NBasf n  
while(l SortUtil.swap(data,l,r); (||qFu9a  
SortUtil.swap(data,l,j); w(`g)`  
RFS} !_t+|  
if((l-i)>THRESHOLD){ -Wmb M]Z  
stack[++top]=i; >Q(\vl@N=  
stack[++top]=l-1; ;Q q_  
} 3'6 UvAXFH  
if((j-l)>THRESHOLD){ />I5,D'h  
stack[++top]=l+1; 3)CIqN  
stack[++top]=j; w+j\Py_G"  
} ^J-Xy\ X  
cs\=8_5  
} iNl<<0a  
file://new InsertSort().sort(data); 8;"%x|iBoL  
insertSort(data); vv Y?8/  
} v,Z]Vqk  
/** !D{z. KO  
* @param data eJ<P  
*/ SfPQ;s'  
private void insertSort(int[] data) { <4;, y*"n  
int temp; 1TA!9cz0Z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); &@{`{  
} JBw2#ry  
} aw lq/  
} l}-k>fug  
Z)~?foe'  
} 2P'Vp7f6 Y  
%YF /=l  
归并排序: tFn[U#'  
=bJ$>Djp  
package org.rut.util.algorithm.support; kzUj)  
nIBeZof  
import org.rut.util.algorithm.SortUtil; ^fd*KM  
?Q=(?yR0]  
/** IRk)u`  
* @author treeroot x~Z7p)D_<  
* @since 2006-2-2 S3U]AH)C  
* @version 1.0 avG#0AY  
*/ B[8 RBTsA  
public class MergeSort implements SortUtil.Sort{ (d NF)(wn  
e'G3\h}#  
/* (non-Javadoc) ]x8Y]wAU&{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W2$rC5|  
*/ ZT/f  
public void sort(int[] data) { r/NaoIrJV  
int[] temp=new int[data.length]; AZNo%!)o  
mergeSort(data,temp,0,data.length-1); O(0a l#Fvj  
} ^qC.bv]&  
q2*)e/}H  
private void mergeSort(int[] data,int[] temp,int l,int r){ 8aRmHy"9l  
int mid=(l+r)/2; Jr2>D=  
if(l==r) return ; :u=y7[I  
mergeSort(data,temp,l,mid); .':17 $c`H  
mergeSort(data,temp,mid+1,r); cJwe4c6.m  
for(int i=l;i<=r;i++){ oliVaavj  
temp=data; *qL2=2  
} ~/SLGyu  
int i1=l; G;t< dJ8  
int i2=mid+1; |yOIC,5[JW  
for(int cur=l;cur<=r;cur++){ g0/ R\  
if(i1==mid+1) $E:z*~ ?  
data[cur]=temp[i2++]; A9DFZZ0  
else if(i2>r) vft7-|8T  
data[cur]=temp[i1++]; mpDxJk!   
else if(temp[i1] data[cur]=temp[i1++]; yl' IL#n]r  
else r_'];  
data[cur]=temp[i2++]; '{JMWNY  
} n3/ Bs  
} g;o5m}  
eK3d_bF+  
} :u@ w ;  
ep48 r>  
改进后的归并排序: ^eRbp?H*T  
,FRa6;  
package org.rut.util.algorithm.support; @1pfH\m  
Pa|*Jcr  
import org.rut.util.algorithm.SortUtil; 3v#F0s|  
5V0#_!QAN  
/** +]H!q W:  
* @author treeroot 9Z 6  
* @since 2006-2-2 G}WY0FC6  
* @version 1.0 6@(o8i   
*/ (h@~0S  
public class ImprovedMergeSort implements SortUtil.Sort { pnv)D}"  
NZ^hp\q  
private static final int THRESHOLD = 10; Y{4nBu  
h2+"e# _  
/* e<u~v0rDl  
* (non-Javadoc) vsq |m 5  
* ?FZ) LZM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #xq|/JWs  
*/ iN L>TVUM  
public void sort(int[] data) { -7I %^u  
int[] temp=new int[data.length]; 1yc$b+TH  
mergeSort(data,temp,0,data.length-1); `[_p,,}Ir  
} O`>u70  
weOga\  
private void mergeSort(int[] data, int[] temp, int l, int r) { xCu\jc)2  
int i, j, k; 7<5=fYb r  
int mid = (l + r) / 2; }?U #@ h  
if (l == r) l>7?B2^<E  
return; E,A9+OKxJ  
if ((mid - l) >= THRESHOLD) d8^S~7  
mergeSort(data, temp, l, mid); >+[{m<Eq  
else /XuOv(j  
insertSort(data, l, mid - l + 1); }%,LV]rGEZ  
if ((r - mid) > THRESHOLD) 5*y6{7FLp  
mergeSort(data, temp, mid + 1, r); Ee$F]NA  
else EuD$^#  
insertSort(data, mid + 1, r - mid); bg*@N  
G|UeR=/  
for (i = l; i <= mid; i++) { @ `SlOKz!=  
temp = data; #]wBXzu?  
} pvM`j86 _  
for (j = 1; j <= r - mid; j++) { 1L _(n  
temp[r - j + 1] = data[j + mid]; "!o|^nN,  
} 2 3A)^j  
int a = temp[l]; ^QTkre  
int b = temp[r]; l27J  
for (i = l, j = r, k = l; k <= r; k++) { 6?l|MU"Q.  
if (a < b) { DPlmrN9@=  
data[k] = temp[i++]; ].N%A07  
a = temp; HhUk9 >7  
} else { *iVv(xXgN  
data[k] = temp[j--]; DV~g  
b = temp[j]; 04!akPP<  
} )KN]"<jB  
} u< 5{H='6  
} IOH6h=  
$4>x4*  
/** 9P-I)ZqL  
* @param data N6/;p]|  
* @param l 2,'%G\QT  
* @param i '# J/e0o@  
*/ FzQ6UO~'  
private void insertSort(int[] data, int start, int len) { &jF[f4:7  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RV6|sN[x>  
} q>dERN&  
} 22v= A6 =  
} MZ <BCRB  
} qoJ<e`h}  
#}nDX4jI  
堆排序: 7j{63d`2  
pm'i4!mY<P  
package org.rut.util.algorithm.support; G/_9!lE  
NAEAvXj  
import org.rut.util.algorithm.SortUtil; )E=~ _`XO  
hXP'NS`iv  
/** Hu7WU;w  
* @author treeroot <FU1|  
* @since 2006-2-2 Y-:dPc{  
* @version 1.0 Z oQPvs7_  
*/ #TG.weTC  
public class HeapSort implements SortUtil.Sort{ }FT8 [m<  
q `^5<  
/* (non-Javadoc) 5,K*IH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vI+X9C?  
*/ tLe"i>  
public void sort(int[] data) { OA8iTn  
MaxHeap h=new MaxHeap(); rn%q*_3-o  
h.init(data); ,~qjL|9  
for(int i=0;i h.remove(); mpDQhD[n  
System.arraycopy(h.queue,1,data,0,data.length); h<IPV'1  
} =@0/.oSD  
3eJ"7sftW  
private static class MaxHeap{ !O*uQB  
$ jgEB+  
void init(int[] data){ C9%2}E3Z$)  
this.queue=new int[data.length+1]; t {RdqAF  
for(int i=0;i queue[++size]=data; `%A>{A"  
fixUp(size); xO2CgqEb  
} !_#2$J*s^D  
} 9a lMC  
c6f[^Q%#j  
private int size=0; ?wYvBFRn7"  
-x0VvkHu  
private int[] queue; m(?ZNtBQt  
P gK> Z,  
public int get() { mj9r#v3.  
return queue[1]; a2\r^fY/  
} tX *}l|;(  
EoD[,:*  
public void remove() { RbGq$vYol/  
SortUtil.swap(queue,1,size--); !$5.\D  
fixDown(1); l&LrcM  
} A,'JmF$d  
file://fixdown 1hnw+T<<W  
private void fixDown(int k) { p!]$!qHO (  
int j; p{BBqKv  
while ((j = k << 1) <= size) { ?YTngIa  
if (j < size %26amp;%26amp; queue[j] j++; qS{E+)P  
if (queue[k]>queue[j]) file://不用交换 N! N>/9  
break; slWO\AYiO  
SortUtil.swap(queue,j,k); "U DV4<|^k  
k = j; 3Sb'){.MT+  
} /9..hEq^  
} 7(oX 1hN  
private void fixUp(int k) { ]~H\X":[>  
while (k > 1) { ?6=u[))M&  
int j = k >> 1; +^\TG>le  
if (queue[j]>queue[k]) @CJ`T&  
break; @ZUrr_|  
SortUtil.swap(queue,j,k); 9X-w5$<  
k = j; ,|r%tNh<8$  
} wQV[ZfU^h  
} ] s))O6^f  
5i42o+'  
} @ppT;9<d  
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} Bl"BmUn  
g* & |Eq/  
SortUtil: dvl'Sq<  
{hmC=j  
package org.rut.util.algorithm;  ~;#OQ[  
s.p4+K J  
import org.rut.util.algorithm.support.BubbleSort; nGqD{!i<  
import org.rut.util.algorithm.support.HeapSort; )*wM DM5q  
import org.rut.util.algorithm.support.ImprovedMergeSort; -J<{NF  
import org.rut.util.algorithm.support.ImprovedQuickSort; \(db1zmS~  
import org.rut.util.algorithm.support.InsertSort; $yA>j (k4  
import org.rut.util.algorithm.support.MergeSort; ^-&BGQM  
import org.rut.util.algorithm.support.QuickSort; knsTy0]  
import org.rut.util.algorithm.support.SelectionSort; s G6ts,={  
import org.rut.util.algorithm.support.ShellSort; :47bf<w|Y  
>-0\wP  
/** ~Gz b^  
* @author treeroot 3m#/1=@o  
* @since 2006-2-2 BsJ d*-:X  
* @version 1.0  KDX1_r=Y  
*/ m/T3Um  
public class SortUtil { (1pR=  
public final static int INSERT = 1; nbMxQOD k  
public final static int BUBBLE = 2; .EF(<JC?  
public final static int SELECTION = 3; )#H&lH  
public final static int SHELL = 4; qq,#bRe  
public final static int QUICK = 5; h| T_ k  
public final static int IMPROVED_QUICK = 6; RZgklEU  
public final static int MERGE = 7; x/B1\U I  
public final static int IMPROVED_MERGE = 8; @F-InfB8.  
public final static int HEAP = 9; <*/IV<  
r+D ?_Lk  
public static void sort(int[] data) { FoNkISzW  
sort(data, IMPROVED_QUICK); b5@sG^  
} zJ=lNb?q  
private static String[] name={ ZR," w  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sMn)[k vX  
}; n`Y"b&  
ev'` K=n8  
private static Sort[] impl=new Sort[]{ Q:5^K  
new InsertSort(), nqFJNK]a  
new BubbleSort(), e2><Y<  
new SelectionSort(), MP3Vo|}3  
new ShellSort(), u{'|/g&  
new QuickSort(), 'xP&u<(F  
new ImprovedQuickSort(), mM$|cge"  
new MergeSort(), LJc"T)>$`  
new ImprovedMergeSort(), zJ $&`=  
new HeapSort() ]<xzCPB  
}; %4QpDt  
L7`=ec<  
public static String toString(int algorithm){ z8@[]6cW  
return name[algorithm-1]; ]wZlJK`K  
} 0Xw$l3@N^  
)yt_i'D}  
public static void sort(int[] data, int algorithm) { tgVMgu  
impl[algorithm-1].sort(data); x##0s5Qn  
} )Ggv_mc h  
T\wfYuc&X  
public static interface Sort { _m.w5nJ  
public void sort(int[] data); KPrH1 [VU  
} Due@ '  
YctWSfh  
public static void swap(int[] data, int i, int j) { >\o._?xSA  
int temp = data; rk-GQ#SKU  
data = data[j]; rQD^O4j R  
data[j] = temp; M-8`zA2  
} |pG%]?A  
} |kGQ~:k+P  
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