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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 } $9./+  
插入排序: =]Y'xzJuu  
+SV!QMIg  
package org.rut.util.algorithm.support; 4xx?x/q  
cmf*BkS  
import org.rut.util.algorithm.SortUtil; O,@QGUoA  
/** F[ ^ p~u{  
* @author treeroot *[nS*D\:  
* @since 2006-2-2 <c`,fd8  
* @version 1.0 _z^&zuO  
*/ ^CwS'/fdN  
public class InsertSort implements SortUtil.Sort{  Z1H  
=w7k@[Bq  
/* (non-Javadoc) >taT V_,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R{4[.  
*/ v]drDVJ   
public void sort(int[] data) { yaj1nq! *"  
int temp; w2"]%WS%  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 7<Ut/1$MI  
} |b Z 58{}  
} Y0'~u+KS`5  
} Sr10ot&ox  
@ceL9#:uc  
} ue *mTMN  
pv|D{39Hs  
冒泡排序: ZCuh^  
{flxZ}  
package org.rut.util.algorithm.support; hEFn>  
D//Ts`}+n  
import org.rut.util.algorithm.SortUtil; My9fbT  
p'SY 2xq-,  
/** \LS s@\$ g  
* @author treeroot bir tA{q  
* @since 2006-2-2 kJXy )  
* @version 1.0 Re\V<\$J  
*/ "'8o8g  
public class BubbleSort implements SortUtil.Sort{ o AS 'Z|  
?IG+U TI  
/* (non-Javadoc) AQBr{^inH|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /i~n**HeF?  
*/ +fF4]WF P  
public void sort(int[] data) { h8SK8sK<  
int temp; l&Fx< W  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ~i@Z4t j7  
if(data[j] SortUtil.swap(data,j,j-1); l$p"%5 ]_  
} 3Z)vJC9'  
} 'UCF2 L  
} )vur$RX  
} bU(fH^  
WAw} ?&k  
} .=b)Ae c  
EJrQ9"x&n  
选择排序: 9%Ftln6  
rFv=j :8  
package org.rut.util.algorithm.support; o2(*5*b!@e  
o@\q6xl.  
import org.rut.util.algorithm.SortUtil; mK7egAo  
^nL_*+V`f  
/** wmS:*U2sc  
* @author treeroot $VE=sS.  
* @since 2006-2-2 == i?lbj  
* @version 1.0 dJg72?"ka  
*/ 0SLn0vD!  
public class SelectionSort implements SortUtil.Sort { tO QY./I  
'r`-J4icX  
/* tTrue?  
* (non-Javadoc) 78+PG(Q_M  
* :] +D+[c)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k!,&L$sG  
*/ \\Huk*Jn{  
public void sort(int[] data) { xqzdXL}  
int temp; PAXdIh[]  
for (int i = 0; i < data.length; i++) { au1(.(  
int lowIndex = i; C@ z^{Z+  
for (int j = data.length - 1; j > i; j--) { \xaK?_hv  
if (data[j] < data[lowIndex]) { g*#.yC1/  
lowIndex = j; g TP0:  
} aq,?  
} RnkrI~x  
SortUtil.swap(data,i,lowIndex); E^jb#9\R  
} [<{+tAdn)  
} '.DFyHsq  
~lLIq!!\  
} ugt|'i  
G_x<2E"d  
Shell排序: nz]+G2 h  
6ax|EMw  
package org.rut.util.algorithm.support; X}3o  
oW/ #/;|`  
import org.rut.util.algorithm.SortUtil; ) crhF9!4  
F4Gv=q)Z  
/** '`Z5 .<n7p  
* @author treeroot {o[ *S%Z"  
* @since 2006-2-2 D@>^_cTO24  
* @version 1.0 dAcy;-[[P  
*/ #}!Ge  
public class ShellSort implements SortUtil.Sort{ c`&<"Us  
ON=6w_  
/* (non-Javadoc) Hi<5jl  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "M.vu}~>  
*/ &De&ZypU  
public void sort(int[] data) { <Cw)S8t  
for(int i=data.length/2;i>2;i/=2){ 4HK#]M>yz  
for(int j=0;j insertSort(data,j,i); ceR zHq=  
} Ol'Ct'_k,"  
} l;SqjkN  
insertSort(data,0,1); anTS8b   
} C2</.jeLa  
Wf=D'6w  
/** .qCD(XZ+  
* @param data ^J]~&.l  
* @param j 1yN/+Rq  
* @param i hIPU%  
*/ .5zqpm  
private void insertSort(int[] data, int start, int inc) { Og`w~!\  
int temp; ,$96bF "#  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); IPoNAi<b  
} QuJ)WaJkC  
} O?9&6x   
} {\L /?#  
ZLJfSnB  
} 4` gAluJ#  
[huS"1  
快速排序: 'lym^^MjL+  
bi bjFg   
package org.rut.util.algorithm.support; -qBrJ1*  
Vx^+Z,y&QP  
import org.rut.util.algorithm.SortUtil; E8~Bp-G)  
!$x9s'D  
/** 39QAj&  
* @author treeroot C0X_t  
* @since 2006-2-2 _kb $S  
* @version 1.0 A-&C.g  
*/ io$!z=W  
public class QuickSort implements SortUtil.Sort{ r-+.Ax4L"  
z17x%jXy  
/* (non-Javadoc) ^[SQw)*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N4Z%8:"pj  
*/ uf (`I  
public void sort(int[] data) { 9 BPucXK  
quickSort(data,0,data.length-1); #AzZ4<;7  
} 2#:h.8  
private void quickSort(int[] data,int i,int j){ 7W6tz\Y  
int pivotIndex=(i+j)/2; $4y;F]  
file://swap ! 3O#'CV  
SortUtil.swap(data,pivotIndex,j); !52]'yub  
R;gN^Yjk:  
int k=partition(data,i-1,j,data[j]); CCOd4  
SortUtil.swap(data,k,j); 7Xi)[M?)#  
if((k-i)>1) quickSort(data,i,k-1); 5uu Zt0V\  
if((j-k)>1) quickSort(data,k+1,j); D}wM$B@S  
Lc!% 3,#.  
} |>(;gr/5(  
/** jX79Nm|  
* @param data  `k/hC  
* @param i S$Tc\ /{  
* @param j ,25Qhz]  
* @return `Pv[A  
*/ R g7  O  
private int partition(int[] data, int l, int r,int pivot) { s('<ms  
do{ cWSiJr):r  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ]VY}VALZ  
SortUtil.swap(data,l,r); Tp&03  
} C#`VVtei  
while(l SortUtil.swap(data,l,r); Lf|5miO  
return l; Q"KD O-t  
} F7wpGtt  
oO-kO!59y  
} %l!Gt"\xm  
f:gXXigY,  
改进后的快速排序: xioL6^(Qk,  
K)c`G_%G  
package org.rut.util.algorithm.support; |T~C($9  
C3 ^QNhv  
import org.rut.util.algorithm.SortUtil; 5 iUT#  
Q=[A P+  
/** <GI{`@5C  
* @author treeroot ~{hcJ:bI  
* @since 2006-2-2 _6v|k}tW'Y  
* @version 1.0 JJ5s |&}  
*/ !SAjV)  
public class ImprovedQuickSort implements SortUtil.Sort { GU\}}j]  
#y }{ 'rF?  
private static int MAX_STACK_SIZE=4096; P)Vm4u 1  
private static int THRESHOLD=10; |'xVU8  
/* (non-Javadoc) gf()NfUvRH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K r9 P#Y  
*/ &)@|WLW  
public void sort(int[] data) { dHV3d'.P  
int[] stack=new int[MAX_STACK_SIZE]; TQyi -Dc  
l(Dkmt>^  
int top=-1; a%a_sR\)  
int pivot; _,Wb`P  
int pivotIndex,l,r; n$n)!XL/  
!sA[A>  
stack[++top]=0; FMCX->}$  
stack[++top]=data.length-1; G j[`r  
vs-%J 6}G  
while(top>0){ =l?F_  
int j=stack[top--]; N6Mo|  
int i=stack[top--]; ]5X=u(}  
#;59THdtPk  
pivotIndex=(i+j)/2; <QoSq'g#,=  
pivot=data[pivotIndex]; #gzY _)E  
[;3` Aw  
SortUtil.swap(data,pivotIndex,j); / E~)xgPM<  
=c 3;@CO  
file://partition Ww&~ZZZ {  
l=i-1; 8.4 1EKr2  
r=j; !P X`sIkT  
do{ bM[!E8dF  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Ergh]"AD6-  
SortUtil.swap(data,l,r); `wRQ-<Y  
} ^a&-GhX;  
while(l SortUtil.swap(data,l,r); #jAlmxN  
SortUtil.swap(data,l,j); #flOaRl.  
bkfwsYZx  
if((l-i)>THRESHOLD){ ZSC Zt&2v  
stack[++top]=i; I^>m-M.  
stack[++top]=l-1; eYd6~T[9  
} i`-,=RJ  
if((j-l)>THRESHOLD){ rxZ%vzVQ>  
stack[++top]=l+1; LWQ.!;HYp  
stack[++top]=j; R4+Gmx1  
} G9y 0;br  
k*)O]M<,  
} ^.5`jdk  
file://new InsertSort().sort(data); 8zv=@`4@G  
insertSort(data); }}Gz3>?24=  
} ^V]DQ%v"I  
/** GORu*[U8  
* @param data o  RT<h  
*/ egcJ@Of  
private void insertSort(int[] data) { 2%Bq[SMuN  
int temp; +X)n}jh  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); i7g+8 zd8d  
} %Q9 iR5?  
} oxkA+}^j8M  
} EugQr<sM#  
X=O}k&  
} /5 rWcX  
tmM8YN|  
归并排序: 6E~T$^Q}  
zrD];DP  
package org.rut.util.algorithm.support; &?\'Z~B4  
^MJTlRUb  
import org.rut.util.algorithm.SortUtil; ATq)8Rm\  
TEC'}%   
/** jx_n$D  
* @author treeroot M>H4bU(  
* @since 2006-2-2 ,})x1y  
* @version 1.0 2n}nRv/'  
*/ 9GdQ$^m  
public class MergeSort implements SortUtil.Sort{ %YjZF[P  
cR.[4rG'  
/* (non-Javadoc) F0,-7<G  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N<bNJD}  
*/ P e_mX*0  
public void sort(int[] data) { {=]1]IWt  
int[] temp=new int[data.length]; ub^v ,S8O  
mergeSort(data,temp,0,data.length-1); 3m1]Ia -9  
} (x7AV$N  
P} =eR  
private void mergeSort(int[] data,int[] temp,int l,int r){ |)'gQvDM  
int mid=(l+r)/2; a o_A %?Ld  
if(l==r) return ; lLD-QO}/  
mergeSort(data,temp,l,mid); nNe`?TS?f  
mergeSort(data,temp,mid+1,r); uM3F[p%V^  
for(int i=l;i<=r;i++){ 4Y>v+N^  
temp=data; jA ?tDAx`  
} Fa]fSqy@;  
int i1=l; TUeW-'/1  
int i2=mid+1; BPAz.K Q  
for(int cur=l;cur<=r;cur++){ OE,uw2uaT  
if(i1==mid+1) !_{2\ &  
data[cur]=temp[i2++]; 4}nsW}jCc  
else if(i2>r) jn+NX)9  
data[cur]=temp[i1++]; /0|niiI  
else if(temp[i1] data[cur]=temp[i1++]; UPtWj8h  
else W)rE_tw,|  
data[cur]=temp[i2++]; z0ULB? *"  
} u+7B-l=u*  
} YLc 2:9  
`V N $ S  
} "]BefvE  
4fe$0mye  
改进后的归并排序: /($!("b  
cI#2MjL  
package org.rut.util.algorithm.support; |E+tQQr%'  
Y,1sNg  
import org.rut.util.algorithm.SortUtil; }Ip"j]h  
"zJGYBen  
/** >AcpJ|V  
* @author treeroot F12tOSfu*  
* @since 2006-2-2 QInow2/u  
* @version 1.0 ]s lYr8m  
*/ ~'/I[y4t  
public class ImprovedMergeSort implements SortUtil.Sort { # L\t)W  
rV LUT  
private static final int THRESHOLD = 10; s(yVE  
5gpqN)|)[  
/* /$OX'L&b  
* (non-Javadoc) !oXA^7Th6]  
* pa0'\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F+e J9  
*/ o!Vs{RRu}  
public void sort(int[] data) { yK"OZ2Mv  
int[] temp=new int[data.length]; >-0b@ +j  
mergeSort(data,temp,0,data.length-1); I+ipTeB^  
} ,z}wR::%  
QC:/xP  
private void mergeSort(int[] data, int[] temp, int l, int r) { \Yv<Tz J9  
int i, j, k; W68d"J%>_  
int mid = (l + r) / 2; A:"J&TbBx  
if (l == r) G>hmVd  
return; %]9 <a  
if ((mid - l) >= THRESHOLD) %9|=\# G  
mergeSort(data, temp, l, mid); A@/DGrZX  
else G@Dw  
insertSort(data, l, mid - l + 1); 0 `X%&  
if ((r - mid) > THRESHOLD) 1\d$2N"  
mergeSort(data, temp, mid + 1, r); \FOX#|i)  
else W'{q  
insertSort(data, mid + 1, r - mid); /*GRE#7S  
cK.T=7T  
for (i = l; i <= mid; i++) { md[FtcY\  
temp = data; CL(,Q8yG  
} ^&t(O1.-  
for (j = 1; j <= r - mid; j++) { Qi^MfHW  
temp[r - j + 1] = data[j + mid]; Vy = fm  
} SM:SxhrGt  
int a = temp[l]; [woR9azC  
int b = temp[r]; 0y4z`rzTn  
for (i = l, j = r, k = l; k <= r; k++) { }z&P^p)R  
if (a < b) { Y[8w0ve- g  
data[k] = temp[i++]; J.x>*3< l  
a = temp; OwGl&  
} else { t/cj z/]  
data[k] = temp[j--]; (sw1HR  
b = temp[j]; \\jB@O  
} %l@Q&)f8e  
} sY,!Ir`/`  
} ;_0)f  
d#T8|#O"  
/** P[{w23`4  
* @param data JH!qGV1  
* @param l _C?<re3*  
* @param i V|NWJ7   
*/ JbYv <  
private void insertSort(int[] data, int start, int len) { [|{yr  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d"78w-S  
} mQ#@"9l%  
} RIX0AE  
} iUh_rX9A"  
} Ms ?V1  
~4Is   
堆排序: dJ`Fvj  
$4kc i@.  
package org.rut.util.algorithm.support; XKp%7;  
(H9%a-3  
import org.rut.util.algorithm.SortUtil; uVqJl{e\  
ovCk :Vz  
/** ,TU!W|($  
* @author treeroot uMF\3T(x4  
* @since 2006-2-2  1$idF  
* @version 1.0 B@*BcE?  
*/ %dZD;Vhg  
public class HeapSort implements SortUtil.Sort{ :EyH'v  
pooi8" G  
/* (non-Javadoc) :^kP?  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <C6/R]x#  
*/ lg;Y}?P  
public void sort(int[] data) { `<t{NJ&f  
MaxHeap h=new MaxHeap(); 'O`jV0aa'  
h.init(data); X.s? =6}g  
for(int i=0;i h.remove(); (?R  
System.arraycopy(h.queue,1,data,0,data.length); ~U8#Iq1  
} ;-=y}DK  
nvD"_.KrJ  
private static class MaxHeap{ 1L'[DKb'  
?w# >Cs(  
void init(int[] data){ I(Nsm3L  
this.queue=new int[data.length+1]; lGPC)Hu{`  
for(int i=0;i queue[++size]=data; S^)r,cC  
fixUp(size); <E@ 7CG.=  
} GMU<$x8o  
} /+RNPQO O  
u7j-uVG  
private int size=0; s~/]nz]"J  
aJMh>  
private int[] queue; W _b $E =  
(uOW5,e7  
public int get() { O)Nt"k7 b  
return queue[1]; fokT)nf~^8  
} |k&.1NkZ  
-7ct+3"J  
public void remove() { /_,~dt  
SortUtil.swap(queue,1,size--); j %TYyL-  
fixDown(1); ^yK94U;<Gy  
} .EloBP  
file://fixdown 5?;'26iC  
private void fixDown(int k) { +nuv?QB/  
int j; 6WfyP@ f  
while ((j = k << 1) <= size) { dGIu0\J\$  
if (j < size %26amp;%26amp; queue[j] j++; <zZAVGb4I  
if (queue[k]>queue[j]) file://不用交换 CX':nai  
break; Tc:W=\<  
SortUtil.swap(queue,j,k); ,_rarU)[J  
k = j; yN3Tk}{V  
} 77i |a]Kd  
} no?)GQ  
private void fixUp(int k) { p w>A Q  
while (k > 1) { S$+ v?Y`)  
int j = k >> 1; Ynz^M{9)K  
if (queue[j]>queue[k]) 10#!{].#x  
break; Y1k/ngH  
SortUtil.swap(queue,j,k); {]<D"x ;  
k = j; #]lUJ &M}e  
} &K>]!yn   
} X""'}X|O  
oTI*mGR1Z  
} TP{a*ke^5,  
+"3eh1q[  
} XOqpys  
CHeG{l)<r  
SortUtil: }0 <x4|=  
sTG+c E  
package org.rut.util.algorithm; 2zFdKs,  
6S6nE%.3  
import org.rut.util.algorithm.support.BubbleSort; t C6c4j  
import org.rut.util.algorithm.support.HeapSort; 1xguG7  
import org.rut.util.algorithm.support.ImprovedMergeSort; !-.-!hBN  
import org.rut.util.algorithm.support.ImprovedQuickSort; v9inBBC q  
import org.rut.util.algorithm.support.InsertSort; _D,8`na>K  
import org.rut.util.algorithm.support.MergeSort; tB_V%qH  
import org.rut.util.algorithm.support.QuickSort; :m&`bq  
import org.rut.util.algorithm.support.SelectionSort; ~7 `x9MUc  
import org.rut.util.algorithm.support.ShellSort; {6%uNT>|  
>t D-kzN  
/** ik$wS#1+L  
* @author treeroot $,aU"'D  
* @since 2006-2-2 =R>Sxaq  
* @version 1.0 |Y'$+[TE  
*/ p1?}"bHk  
public class SortUtil { ,6M-xSDs  
public final static int INSERT = 1; ,j_{IL690  
public final static int BUBBLE = 2; &us8,x6yg  
public final static int SELECTION = 3; 21o_9=[^  
public final static int SHELL = 4; G0Wd"AV+  
public final static int QUICK = 5; zl: u@!'  
public final static int IMPROVED_QUICK = 6; \Flq8S/t^  
public final static int MERGE = 7; LpmspIPvf  
public final static int IMPROVED_MERGE = 8; 9d{W/t?NH  
public final static int HEAP = 9; =k$d8g ez  
Q%eBm_r;  
public static void sort(int[] data) { tjd"05"@:  
sort(data, IMPROVED_QUICK); vj^U F(X  
} ZH0f32K  
private static String[] name={ 'nT#3/rL  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ro<!n>H  
}; eGTK^p  
19N:9;Ixz  
private static Sort[] impl=new Sort[]{ xJ"Zg]d{  
new InsertSort(), /ruf1?\,R  
new BubbleSort(), 6~!YEuA  
new SelectionSort(), 4X\*kF%  
new ShellSort(),  ]Ea7b  
new QuickSort(), JxLH]1b  
new ImprovedQuickSort(), XS!ZTb>[  
new MergeSort(), 6pLwwZD  
new ImprovedMergeSort(), :mJM=FeJ  
new HeapSort() }oN(nPxv9  
}; T^nX+;:|  
I2W2B3D` c  
public static String toString(int algorithm){ Vks,3$  
return name[algorithm-1]; N Dg]s2T  
} J<BdIKCma  
\ yOZ&qU  
public static void sort(int[] data, int algorithm) { 4O`h%`M  
impl[algorithm-1].sort(data); @[FFYVru  
} ^LNc  
>|'6J!Op  
public static interface Sort { #KK(Z \;  
public void sort(int[] data); 4`UT_LcI  
} ; Q 6:#  
N |~&Q!A&  
public static void swap(int[] data, int i, int j) { k9n  
int temp = data; \6'A^cE/PX  
data = data[j]; E{6}'FG+A  
data[j] = temp; u]2k%TUY  
} [.Y=~)7FB  
} ho20> vw#  
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