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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。 |Ii[WfFA|J  
插入排序: .0+=#G>  
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package org.rut.util.algorithm.support; GrPKJ~{6  
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import org.rut.util.algorithm.SortUtil; lQ(I/[qVd  
/** o b;]  
* @author treeroot X67^@~l  
* @since 2006-2-2 5#|D1A  
* @version 1.0 X$Eg(^La  
*/ cLhHGwX=x  
public class InsertSort implements SortUtil.Sort{ q#s:2#=  
%Z_/MNI  
/* (non-Javadoc) 6Y9FU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,\8F27  
*/ a@4 Z x  
public void sort(int[] data) { m.!n|_}]  
int temp; mUSrCU_}  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 9j<qi\SSI  
} r&!Ebe-  
} Bu_/yKW  
} y.vYT{^  
M~/7thP{  
} R<(kiD\?]  
{;mT.[  
冒泡排序: 9BR/zQ2  
R. :~e  
package org.rut.util.algorithm.support; $.HZz  
^#i3JMq  
import org.rut.util.algorithm.SortUtil; 9lXjB_wG>  
} V  *  
/** d?[gd(O  
* @author treeroot ^EtBo7^t  
* @since 2006-2-2 v<0\+}T1R  
* @version 1.0 5>CmWMQ  
*/ (B+CI%= D  
public class BubbleSort implements SortUtil.Sort{ Q+bZZMK5,U  
Dnk}  
/* (non-Javadoc) b-!+Q)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &k53*Wo  
*/ J n>3c  
public void sort(int[] data) { P'}WmE'B}F  
int temp; 2:[ -  
for(int i=0;i for(int j=data.length-1;j>i;j--){ J:D{5sE<|  
if(data[j] SortUtil.swap(data,j,j-1); [7Fx#o=da  
} Y6W#u iqk  
} U)v){g3w)  
} ?`T0zpC  
} +|0f7RB+R  
IkWV|E  
} /6fa 7;  
X%X`o%AqC  
选择排序: R;d)I^@  
0+3_CS++r  
package org.rut.util.algorithm.support; !V.2~V[^M  
= 1ltX+   
import org.rut.util.algorithm.SortUtil; lKVV*RR}  
G.{)#cR  
/** qe/dWJBa  
* @author treeroot 1Jm'9iy3  
* @since 2006-2-2 E^s<5BC;  
* @version 1.0 o,NTI h  
*/ ccR#<Pb6q  
public class SelectionSort implements SortUtil.Sort { kz!CxI (  
9Gh:s6  
/* L/Tsq=  
* (non-Javadoc) _s{;9&qX]  
* bT>1S2s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ob. Br:x  
*/ |7CFm  
public void sort(int[] data) { 1 lZRi-P  
int temp; [LF<aR5  
for (int i = 0; i < data.length; i++) { ^QG;:.3v  
int lowIndex = i; 2#jBh   
for (int j = data.length - 1; j > i; j--) { MA`.&MA.  
if (data[j] < data[lowIndex]) { xcHuH -}  
lowIndex = j; 3a Y^6&  
} y|b&Rup  
} w|,BTM:e  
SortUtil.swap(data,i,lowIndex); 7jS`4,  
} HuI?kLfj\  
} faIHmU  
/ biB *Z  
} N+N98~Y`P  
F[@M?  
Shell排序: )lh Pl  
L#|6L np^  
package org.rut.util.algorithm.support; ^{}$o#iof  
vk><S|[n  
import org.rut.util.algorithm.SortUtil; Mn<#rBE B  
e+~Q58oD  
/** L,\wB7t  
* @author treeroot (O!Q[WLS  
* @since 2006-2-2 dje}C bZ  
* @version 1.0 c0U=Hj@@  
*/ {t%Jc~p{  
public class ShellSort implements SortUtil.Sort{ FW@(MIH  
zn)Kl%N^  
/* (non-Javadoc) EEJ OJ<  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2kSN<jMr  
*/ b+#A=Z+Pr  
public void sort(int[] data) { aj`_* T"A  
for(int i=data.length/2;i>2;i/=2){ z)_h"y?H{%  
for(int j=0;j insertSort(data,j,i); /^pPT6  
} # ? _8 *?  
} V44M=c7E  
insertSort(data,0,1); umuE5MKY<  
} $! R]!s  
dd-`/A@  
/** !Y,*Zc$R  
* @param data &;2@*#,  
* @param j NsN =0ff  
* @param i I]iTD  
*/ Q!R eA{  
private void insertSort(int[] data, int start, int inc) { o6ag{Yp  
int temp; #a+*u?jnnL  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); U6xs'0  
} ;&} rO.0  
} eqQ=HT7J  
} *=b36M   
/^\UB fE  
} U9t-(`[j?  
%] #XIr  
快速排序: SL$ bV2T  
;^DG P  
package org.rut.util.algorithm.support; a,ZmDkzuv  
;) XB'  
import org.rut.util.algorithm.SortUtil; Hs`j6yuc9  
/'QfLW>6  
/** xgq `l#  
* @author treeroot n6C]JWG\/U  
* @since 2006-2-2 x='T`*HD  
* @version 1.0 `G_k~ %  
*/ ;_6 CV  
public class QuickSort implements SortUtil.Sort{ u` L9Pj&v  
Iw[7;B5v  
/* (non-Javadoc) HP(dhsd<c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [k{2)g  
*/ b^^ .$Gu  
public void sort(int[] data) { Q:^.Qs"IK  
quickSort(data,0,data.length-1); c]PG5f xf  
} TfnBPO  
private void quickSort(int[] data,int i,int j){ I6vy:5d  
int pivotIndex=(i+j)/2; U'p-Ko#  
file://swap $mu*iW\{  
SortUtil.swap(data,pivotIndex,j); L_O*?aaZ  
tDQuimYu7  
int k=partition(data,i-1,j,data[j]); ]9PQKC2&  
SortUtil.swap(data,k,j); Me2qOc^Z-  
if((k-i)>1) quickSort(data,i,k-1); sL!+&Id|  
if((j-k)>1) quickSort(data,k+1,j); ',bSJ4)Y  
zPc kM)  
} '`sZo1x%f  
/** Yaix\*II  
* @param data 'Da*MGu9  
* @param i w#^z:7fI  
* @param j 2>*b.$g  
* @return |))O3]-  
*/ nh]}KFO h  
private int partition(int[] data, int l, int r,int pivot) { -$sVqR>_  
do{ :d=: >_[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); $_f"NE}  
SortUtil.swap(data,l,r); .I%`yhCW  
} NbPNcjPL  
while(l SortUtil.swap(data,l,r); jz$ ]"\G#  
return l; e1/{bX5  
} AU 4K$hC^  
GV0-"9uwX~  
} DIBoIWSuR  
?rxq//S2  
改进后的快速排序: W )jtTC7  
<^da-b>C  
package org.rut.util.algorithm.support; Xj5oHHwn  
%$[#/H7=W  
import org.rut.util.algorithm.SortUtil; .D{He9  
*W-:]t3CR  
/** brEA-xNWQ  
* @author treeroot u"gtv  
* @since 2006-2-2 Xkp?)x3~X  
* @version 1.0 Sp/<%+2(  
*/ h>"j!|#!s  
public class ImprovedQuickSort implements SortUtil.Sort { 2Y~nU(  
EE5mVC&  
private static int MAX_STACK_SIZE=4096; :r4o:@N'  
private static int THRESHOLD=10; -]Y@_T.C  
/* (non-Javadoc) 3eERY[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pD17r}%  
*/ 6wq>&P5  
public void sort(int[] data) { .R]DT5  
int[] stack=new int[MAX_STACK_SIZE]; gP.PyYUV  
Vrn+"2pdJ  
int top=-1; ib-H jJ8  
int pivot; !2F X l;  
int pivotIndex,l,r; %R^*MUTx  
+3[8EM#g  
stack[++top]=0; b?K`DUju{0  
stack[++top]=data.length-1; a.2Xl}2o5  
=/Ph ]f9  
while(top>0){ IXv9mr?H}  
int j=stack[top--]; A)_HSIVi  
int i=stack[top--]; i]15g@  
_=_<cg y1u  
pivotIndex=(i+j)/2; txik{' :  
pivot=data[pivotIndex]; i:60|ngK  
.$]-::&  
SortUtil.swap(data,pivotIndex,j); 5m2f\^U  
(vFO'jtcB-  
file://partition Y/ I32@  
l=i-1; k}0b7er=R  
r=j; "1Y'VpKm(~  
do{ yT-qT_.  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); a4&Aw7"X  
SortUtil.swap(data,l,r); s63!]LDr  
} [H@71+_Q  
while(l SortUtil.swap(data,l,r); |B {*so]  
SortUtil.swap(data,l,j); :i>If:>g  
hgK 4;R  
if((l-i)>THRESHOLD){ ,c,@WQ2:-  
stack[++top]=i; PiN^/#D  
stack[++top]=l-1; u N4e n,  
} 8d7 NESYl  
if((j-l)>THRESHOLD){ Y_<-.?jf  
stack[++top]=l+1; ..7 "<"uH  
stack[++top]=j; ^^B~v<uK  
} ly#jl5wmT  
=O3)tm;  
} GfV#^qi  
file://new InsertSort().sort(data); &grqRt  
insertSort(data); a}Z+"D  
} H128T8?r[  
/** b|-S;cw  
* @param data E>iN>  
*/ xqb*;TBh*  
private void insertSort(int[] data) { 3EHB~rL/C  
int temp; c2gi 3  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); %j@@J\G!  
} ;0lY_ii  
} G#fF("Ndu`  
} 24u_}ZQzY  
_#qfe  
} !Df>Q5~g  
yy Y\g  
归并排序: ~@DdN5  
nH<#MG BS  
package org.rut.util.algorithm.support; Lg~ll$ U  
t.#ara{  
import org.rut.util.algorithm.SortUtil; cn Oh j  
{isL<  
/** W{c Z7$d  
* @author treeroot >p'{!k  
* @since 2006-2-2 { [3xi`0-  
* @version 1.0 pp{ 2[>  
*/ L5'?.9]  
public class MergeSort implements SortUtil.Sort{ p|?FA@ 3  
2;(+]Ad<  
/* (non-Javadoc) w+wtr[;wwL  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d<6m_! L  
*/ ^GlzKl   
public void sort(int[] data) { bjo} 95  
int[] temp=new int[data.length]; 9s1^hW2%Q  
mergeSort(data,temp,0,data.length-1); d^f rKPB  
} *%Fu/  
%lD+57=  
private void mergeSort(int[] data,int[] temp,int l,int r){ txvo7?Y*4  
int mid=(l+r)/2;  O4Q"2  
if(l==r) return ; je5[.VTM  
mergeSort(data,temp,l,mid); :a^/&LbLm  
mergeSort(data,temp,mid+1,r); q}!h(-y}5n  
for(int i=l;i<=r;i++){ 80ox$U  
temp=data; A'.=SA2.Y  
} H~^)^6)^T  
int i1=l; '/)qI.  
int i2=mid+1; e^'|<0J  
for(int cur=l;cur<=r;cur++){ i\O^s ]  
if(i1==mid+1) Ch\__t*v!  
data[cur]=temp[i2++]; " :f]egq -  
else if(i2>r) uXk]  
data[cur]=temp[i1++]; fY6~Z BvK  
else if(temp[i1] data[cur]=temp[i1++]; jwUX?`6jX  
else I _gE`N  
data[cur]=temp[i2++]; Y2;2Exp^  
} T];dFv-GT  
} )XHn.>]nc  
U E$Ix  
} XMiu}w!  
lB0`|UEb (  
改进后的归并排序: 0)M8Tm0$  
R8_I ASs  
package org.rut.util.algorithm.support; v`{N0R  
x|O^#X(,  
import org.rut.util.algorithm.SortUtil; uovv">Uw  
[h8s0  
/** %~y>9K  
* @author treeroot Sg4{IU  
* @since 2006-2-2 +VNk#Z i  
* @version 1.0 =~k c7f{  
*/ 9?8PMh.  
public class ImprovedMergeSort implements SortUtil.Sort { b+|3nc!  
2:_6nWl  
private static final int THRESHOLD = 10; dt^h9I2O  
fvcS=nRQv  
/* ?^M,Mt  
* (non-Javadoc) *yaS^k\  
* 0y6M;"&~E  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &!OEd ]  
*/ *ziR&Fr!  
public void sort(int[] data) { yIrJaS-  
int[] temp=new int[data.length]; eZaSV>27  
mergeSort(data,temp,0,data.length-1); I/%v`[  
}  ?C#E_  
0ZM(heQ  
private void mergeSort(int[] data, int[] temp, int l, int r) { b>Y{,`E3  
int i, j, k; R(`:~@ 3\6  
int mid = (l + r) / 2; !?(7g2NP)  
if (l == r) tAF?. \x"g  
return; 7 @ )  
if ((mid - l) >= THRESHOLD) OQ7 `n<I<)  
mergeSort(data, temp, l, mid); ! 5NuFLOf  
else NC#F:M;b  
insertSort(data, l, mid - l + 1); s2#Ia>5!  
if ((r - mid) > THRESHOLD) i'7+ ?YL  
mergeSort(data, temp, mid + 1, r); u '7h(1@  
else IHYLM;@L  
insertSort(data, mid + 1, r - mid); dH!z<~  
Jjm#ofv  
for (i = l; i <= mid; i++) { bh<;px-  
temp = data; Vv45w#w;  
} !t^DN\\#  
for (j = 1; j <= r - mid; j++) { #<S*MGp!=  
temp[r - j + 1] = data[j + mid]; qh:Bc$S  
} 2lCFE)  
int a = temp[l]; 3f] ;y<Km  
int b = temp[r]; vWZXb `  
for (i = l, j = r, k = l; k <= r; k++) { u0c}[BAF  
if (a < b) { iN[x *A|h  
data[k] = temp[i++]; =9X1+x  
a = temp; 68Gywk3]=u  
} else { BtZ]~S}v  
data[k] = temp[j--]; pYx,*kG:HW  
b = temp[j]; D]]wJQU2  
} & cSVOsi  
} Ic9L@2m  
} ,-4NSli  
F5Z,Jmi^M  
/** pA ~} _  
* @param data >%k6k1CZ  
* @param l  k~ ^4  
* @param i MQQm3VaKS  
*/ R7kkth  
private void insertSort(int[] data, int start, int len) { `o JQA$UD  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m{/( 3  
} %bAQ>E2;m  
} N-\N\uN  
} :<t=??4m  
} MLu!8dgI  
W<r<K=`5P  
堆排序: >ESVHPj]  
IWQ0I&tzdx  
package org.rut.util.algorithm.support; k*\Bl4g  
(4T0U5jgT  
import org.rut.util.algorithm.SortUtil; 5e /YEDP  
x,!Dd  
/** .9r YBy  
* @author treeroot sD:o 2(G*  
* @since 2006-2-2 U X@%1W!8  
* @version 1.0 Lwr's'ao.  
*/ ^_;'9YD  
public class HeapSort implements SortUtil.Sort{ wqb4w7%  
z3jk xWAZ  
/* (non-Javadoc) 6^wI^`NI  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u4C9ZYN  
*/ U!aM63F3  
public void sort(int[] data) { V4n~Z+k  
MaxHeap h=new MaxHeap(); GtVT^u_   
h.init(data); H#~gx_^U  
for(int i=0;i h.remove(); P>V oA  
System.arraycopy(h.queue,1,data,0,data.length); )*~A|[  
} z uV%`n  
"bm|p/A  
private static class MaxHeap{ m2c'r3UEu  
BDB*>y7(  
void init(int[] data){ ;=Ma+d#  
this.queue=new int[data.length+1]; >fH0>W+!  
for(int i=0;i queue[++size]=data; Vr1}Zv3K'  
fixUp(size); 6ZqU:^3  
} ~U0%}Bbh  
} Qt>K{ >9Cf  
l88=  
private int size=0; K(EJ`2]:r  
h2ROQKL"B  
private int[] queue; b=,B Le\  
C/e.BXA  
public int get() { gV2vwe  
return queue[1]; 2:*15RH3  
} m,k 0 h%  
r5}p .  
public void remove() { um.ZAS_kmc  
SortUtil.swap(queue,1,size--); D&G6^ME  
fixDown(1); 'D+xs}\  
} rH3U;K!  
file://fixdown P`biHs8O  
private void fixDown(int k) { *;fTiL  
int j; IT| h;NUG  
while ((j = k << 1) <= size) { L4>14D\  
if (j < size %26amp;%26amp; queue[j] j++; q)?%END  
if (queue[k]>queue[j]) file://不用交换 ?UtKu  
break; 9/k2 zXY  
SortUtil.swap(queue,j,k); >)kKP8l7  
k = j; V<QpC5  
} b^/u9  
} )|~&(+Q?]  
private void fixUp(int k) { ;6G]~}>o  
while (k > 1) { .xT?%xSi/  
int j = k >> 1; hX.cdt_?  
if (queue[j]>queue[k]) /5NWV#-  
break; =Z\q``RBy  
SortUtil.swap(queue,j,k); Dvg'  
k = j; Kxsd@^E  
} MntmBj-T  
} [V'c  
q"VmuQ  
} + -<8^y  
Y25`vE(  
} Hn/t'D3  
Wg|6{'a  
SortUtil: T|~5dZL  
~c EN=(Z~r  
package org.rut.util.algorithm; 3H#,qug$  
S5).\1m h[  
import org.rut.util.algorithm.support.BubbleSort; YWIA(p8Qkk  
import org.rut.util.algorithm.support.HeapSort; iJ{axa &  
import org.rut.util.algorithm.support.ImprovedMergeSort; ]Jswxw  
import org.rut.util.algorithm.support.ImprovedQuickSort; (HAdr5  
import org.rut.util.algorithm.support.InsertSort; ~VsN\!G  
import org.rut.util.algorithm.support.MergeSort; w7 MRuAJ4  
import org.rut.util.algorithm.support.QuickSort; x1@,k=qrd  
import org.rut.util.algorithm.support.SelectionSort; >WZ.Dj0n  
import org.rut.util.algorithm.support.ShellSort; F'uqL+jVO  
:` SIuu~@  
/** RuHDAJ"&a  
* @author treeroot zA#pgX[#  
* @since 2006-2-2 b 8@}Jv  
* @version 1.0 i+`8$uz  
*/ ,a5q62)q  
public class SortUtil { 4Wl`hF  
public final static int INSERT = 1; ozOc6  
public final static int BUBBLE = 2; so` \e^d  
public final static int SELECTION = 3; Xe4   
public final static int SHELL = 4; 3o rSk  
public final static int QUICK = 5; Hcf"u&%  
public final static int IMPROVED_QUICK = 6; ^tTM 7  
public final static int MERGE = 7; }9ulHiR  
public final static int IMPROVED_MERGE = 8; ) 8xbc&M  
public final static int HEAP = 9; c]*yo  
R~=c1bpdq  
public static void sort(int[] data) { z(A60b}  
sort(data, IMPROVED_QUICK); fHaF9o+/b  
} (Nzh1ul\}  
private static String[] name={ Ic3a\FTr\  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^iH[ 22 b4  
}; K"l~bFCZ8  
4zs0+d +  
private static Sort[] impl=new Sort[]{ 3ML^ dZ'  
new InsertSort(), u&*[   
new BubbleSort(), ~=yU%5 s@  
new SelectionSort(), }oD^tU IK  
new ShellSort(), x1~AY/)v  
new QuickSort(), IR"C?  
new ImprovedQuickSort(), 7^>~k}H  
new MergeSort(), H ezbCwsx&  
new ImprovedMergeSort(), BD"Dzq  
new HeapSort() +`flIG3RV  
}; remc_}`w  
i6bUJtL  
public static String toString(int algorithm){ e\}@w1  
return name[algorithm-1]; Csu9u'.V  
} U/Cc!WXV]  
dsX"S;`v  
public static void sort(int[] data, int algorithm) { Lum=5zDo  
impl[algorithm-1].sort(data); 1!zd#TX  
} )7NK+k  
VK/L}^=GOO  
public static interface Sort { =o~mZ/ 7=M  
public void sort(int[] data); c6jVx_tt.  
} `"~GqFwy~  
|ghyH  
public static void swap(int[] data, int i, int j) { KEy8EB  
int temp = data; 5Y;&L!T  
data = data[j]; /\e_B6pF<  
data[j] = temp; [#!Y7Ede  
} /sYr?b!/<6  
} 8}BM`@MG  
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