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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。 B^=-Z8  
插入排序: UsG~row:!  
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package org.rut.util.algorithm.support; cdH>n)  
`%bypHeSp  
import org.rut.util.algorithm.SortUtil; Xfc-UP|}  
/** D_2:k'4  
* @author treeroot Q>qUk@  
* @since 2006-2-2 ux-/>enc  
* @version 1.0 umBICC]CU  
*/ W ~<^L\Lu  
public class InsertSort implements SortUtil.Sort{ u~N?N W Q  
iO$8:mxm0?  
/* (non-Javadoc) Y;eZ9|Ht9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [|wZ77\  
*/ Z{.8^u1I  
public void sort(int[] data) { NSMyliM1Y  
int temp; ZmqKQO  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); wVXS%4|v  
} &<g|gsG`  
} Jumgb  
} uh_RGM&  
*tFHM &a  
} "s-"<&>a(  
a~`eQ_N D  
冒泡排序: k8yEdi`  
Eh`7X=Z7E  
package org.rut.util.algorithm.support; Ufj`euY  
9)yJ: N#F  
import org.rut.util.algorithm.SortUtil; o#)C^xlQ  
qAr M|\l1  
/** ~G p [_ %K  
* @author treeroot .<?GS{6 N  
* @since 2006-2-2 CT@ jZtg0  
* @version 1.0 8,Z_{R#|  
*/ ;a!S!% .h  
public class BubbleSort implements SortUtil.Sort{ Rh2+=N<X  
OKZV{Gja  
/* (non-Javadoc) fm%t^)E  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A|[?#S((]  
*/ @u+]aI!`-  
public void sort(int[] data) { eeg)N1\  
int temp; r r %V.r;2  
for(int i=0;i for(int j=data.length-1;j>i;j--){ G>_*djUf  
if(data[j] SortUtil.swap(data,j,j-1); 2szPAuN+  
} lBE= (A`  
} H'5)UX@LP  
} eIF5ZPSZi  
} "!P3R1;%  
 ~NgA  
} b6M[q_   
+ J{IRyBc  
选择排序: unzr0x {  
pad*oPH,  
package org.rut.util.algorithm.support; g axsv[W>^  
\sixI;-2  
import org.rut.util.algorithm.SortUtil; 2DrM3ZU8  
9=M$AB  
/** ;+_:,_  
* @author treeroot tT8%yG}  
* @since 2006-2-2 2|y"!JqE1  
* @version 1.0 +/7?HGf  
*/ SR hiQ  
public class SelectionSort implements SortUtil.Sort { /N+dQe  
@7c?xQVd$  
/* mIvx1_[  
* (non-Javadoc) "{+QW  
* "cGk)s  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N% B>M7-=  
*/ =J==i?  
public void sort(int[] data) { !,uE]gwLw  
int temp; m~ABC#,2  
for (int i = 0; i < data.length; i++) { wm@@$  
int lowIndex = i; qo~O|~  
for (int j = data.length - 1; j > i; j--) { EWt[z.`T1  
if (data[j] < data[lowIndex]) { //MUeTxR  
lowIndex = j;  dFc':|  
} qwcD`HV,  
} \K{ z  
SortUtil.swap(data,i,lowIndex); ]c*4J\s  
} tjS@meT  
} GA )`-*.R  
zk+9'r`-D  
} P;no?  
,ng Cv;s  
Shell排序: S?LQu  
2.y-48Nz  
package org.rut.util.algorithm.support; I{&[[7H  
59L\|OR  
import org.rut.util.algorithm.SortUtil; v~C Czg  
:4w ?#  
/** L{\8!51L  
* @author treeroot Hio0HL-  
* @since 2006-2-2 S+6.ZZ9c  
* @version 1.0 ,THw"bm  
*/ *a^(vo   
public class ShellSort implements SortUtil.Sort{ B mb0cF Q  
"{xrL4BtC  
/* (non-Javadoc) m7V/zne  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~=LE0.3[  
*/ W i.& e  
public void sort(int[] data) { )q4[zv9  
for(int i=data.length/2;i>2;i/=2){ B-Hrex]  
for(int j=0;j insertSort(data,j,i); #%2rP'He  
} .V<+v-h  
} 3\,4 ]l|  
insertSort(data,0,1); 4"ZP 'I;  
} LOYk9m  
_61gF[r4!Y  
/** gJ+'W1$/  
* @param data V Q@   
* @param j e%M;?0j  
* @param i Ne!lH@ql  
*/ wQf-sk#  
private void insertSort(int[] data, int start, int inc) { {YC@T(  
int temp; ]/6z; ~3U  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); IPpN@  
} y.k~Y0  
} **CR} yV  
} >'$Mp<  
Y@iS_lR  
} ,p a {qne  
~ Iuf}D;  
快速排序: 6@!`]tSCK  
0mVNQxHI  
package org.rut.util.algorithm.support; qR{=pR  
cjY-y-vO  
import org.rut.util.algorithm.SortUtil; 6MW{,N  
P+sW[:  
/** 3?yg\  
* @author treeroot ]EAO+x9  
* @since 2006-2-2 i]4I [!  
* @version 1.0 n@i HFBb  
*/ WwFm*4{[o  
public class QuickSort implements SortUtil.Sort{ q2j{tP#  
>=>2m2z=  
/* (non-Javadoc) Or+U@vAnk  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :cECRm*  
*/ o|:b;\)b  
public void sort(int[] data) { "sCRdx]_  
quickSort(data,0,data.length-1); +\A,&;!SR  
} Qv-_ jZ  
private void quickSort(int[] data,int i,int j){ =WATyY:s  
int pivotIndex=(i+j)/2; _VN?#J)o  
file://swap 3"i-o$P  
SortUtil.swap(data,pivotIndex,j); ]6` %  
'<<t]kK[N  
int k=partition(data,i-1,j,data[j]); L*+@>3mu)  
SortUtil.swap(data,k,j); ITBE|b  
if((k-i)>1) quickSort(data,i,k-1); Llo"MO*sr  
if((j-k)>1) quickSort(data,k+1,j); /6* 42[r  
+'a^f5  
} m0SlOgRsk  
/** tk`v:t!6U  
* @param data _{KG 4+5\X  
* @param i ND;#7/$>  
* @param j cI*;k.KU  
* @return m(!FHPvN  
*/ Fxz"DZY6  
private int partition(int[] data, int l, int r,int pivot) { xp{tw$  
do{ [q -h|m  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); q9_OGd|P  
SortUtil.swap(data,l,r); " 8MF_Gu):  
} 7$=In K  
while(l SortUtil.swap(data,l,r); M }D}K\)  
return l; 2ilQXy  
} vE?G7%,  
aFYIM`?(  
} oc`H}Wvn  
F41=b4/  
改进后的快速排序: 3 0H?KAV  
,"ZMRq  
package org.rut.util.algorithm.support; ?a5!H*,  
T5h H  
import org.rut.util.algorithm.SortUtil; bd-L` ={j  
7NGxa6wi  
/** i.m^/0!  
* @author treeroot 5;EvNu  
* @since 2006-2-2 Q2gq}c~  
* @version 1.0 7:1Lol-V  
*/ QWYJ *  
public class ImprovedQuickSort implements SortUtil.Sort { p5iuYHKk?  
ez$(c  
private static int MAX_STACK_SIZE=4096; R m( "=(  
private static int THRESHOLD=10; }7Q%6&IR  
/* (non-Javadoc) /8S>;5hvK@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T~e.PP  
*/ |{ip T SH  
public void sort(int[] data) { S1_RjMbYM  
int[] stack=new int[MAX_STACK_SIZE]; #6=  
rILYI;'o  
int top=-1; l f, 5w  
int pivot; ?caSb =f  
int pivotIndex,l,r; [W&T(%(W-  
S9.o/mr  
stack[++top]=0; 77Dn97l)&  
stack[++top]=data.length-1; hgq;`_;1,  
0=YI@@n)  
while(top>0){ qE"OB  
int j=stack[top--]; fJg+Ryo  
int i=stack[top--]; H:| uw  
PW0LG^xp`  
pivotIndex=(i+j)/2; oEv 'dQ9  
pivot=data[pivotIndex]; ]f_p 8?j"  
2^7`mES  
SortUtil.swap(data,pivotIndex,j); ~xFkU#  
QXK{bxwC  
file://partition W=?<<dVYD  
l=i-1; ? J0y|  
r=j; z24q3 3O  
do{ %N._w!N<5n  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); {Sh ;(.u^  
SortUtil.swap(data,l,r); hZb_P\1X  
} /n&&Um\  
while(l SortUtil.swap(data,l,r); :2`e(+Uz  
SortUtil.swap(data,l,j); {JLtE{  
'&b+R`g'  
if((l-i)>THRESHOLD){ TWTb?HP  
stack[++top]=i; f o3}W^0  
stack[++top]=l-1; : A;RH  
} i%?*@uj  
if((j-l)>THRESHOLD){ YmG("z  
stack[++top]=l+1; }GM'.yutX  
stack[++top]=j; (ZlU^Gw#UB  
} z1a7*)8P  
-9?]IIVb  
} ;_=&-mz  
file://new InsertSort().sort(data); 6u6x  
insertSort(data); A#,ZUOPGH  
} c+ie8Q!  
/** ueNS='+m  
* @param data 8Zdn,}Z  
*/ pxi3PY?  
private void insertSort(int[] data) { #'}*dy/  
int temp; :`sUt1Fw.  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); h68 xet;  
} &p,]w~d,U  
} ]?4hyN   
} (9)Q ' 'S  
$~)SCbL^5  
} 7tp36TE  
3so %gvY.'  
归并排序: P+}h$ _x  
j~MI<I+l[  
package org.rut.util.algorithm.support; WIGi51yC.x  
r JB}qYD  
import org.rut.util.algorithm.SortUtil; ALHIGJW:6$  
8P`"M#fI  
/** eMzk3eOJ  
* @author treeroot 5)40/cBe  
* @since 2006-2-2 *qq+jsA6wH  
* @version 1.0 XWw804ir  
*/ {;oPLr+Z  
public class MergeSort implements SortUtil.Sort{ (@YG~ 0  
%TqC/c  
/* (non-Javadoc) b.938#3,  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <UCl@5g&  
*/ W+* V)tf  
public void sort(int[] data) { ?JUeuNs9  
int[] temp=new int[data.length]; O6Y0XL  
mergeSort(data,temp,0,data.length-1); 9+N-eW_U  
} l,).p  
G~m<;  
private void mergeSort(int[] data,int[] temp,int l,int r){ 2<3K3uz  
int mid=(l+r)/2; >Q*Wi  
if(l==r) return ; \)e'`29;  
mergeSort(data,temp,l,mid); Bbc^FHip  
mergeSort(data,temp,mid+1,r); d;>QhoiL  
for(int i=l;i<=r;i++){ 5zJq9\)d+  
temp=data; KPki}'GO  
} unxqkU/<Z  
int i1=l; ]$hBMuUa  
int i2=mid+1; $cg cX  
for(int cur=l;cur<=r;cur++){ Hr C+Yjp  
if(i1==mid+1) xz]~ jL@-]  
data[cur]=temp[i2++]; a'T;x`b8U,  
else if(i2>r) dr"1s-D4IQ  
data[cur]=temp[i1++]; x1a:u  
else if(temp[i1] data[cur]=temp[i1++]; f QFk+C  
else <3 uNl  
data[cur]=temp[i2++]; '%;m?t% q  
} Dp:BU|r  
} vQ.R{!",>  
EM_d8o)`B  
} gM]:Ma  
 !u hT  
改进后的归并排序: Gm`8q}<I  
.)3<Q}>  
package org.rut.util.algorithm.support; k3|Z7eW}[  
^z\cyT%7t  
import org.rut.util.algorithm.SortUtil; + T+#q@  
OTv)  
/** $;PMkUE  
* @author treeroot \<K5ZIWV  
* @since 2006-2-2 zm#  ?W  
* @version 1.0 iow"n$/  
*/ `0svy}  
public class ImprovedMergeSort implements SortUtil.Sort { /kG_*>.Z  
/_.|E]  
private static final int THRESHOLD = 10; ->jDb/a{C  
p4QU9DF  
/* s#MPX3itK  
* (non-Javadoc) YYS0`  
* O0:q;<>z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dWW.Y*339  
*/ |[lKY+26:{  
public void sort(int[] data) { AFn7uW!9Gw  
int[] temp=new int[data.length]; HKeK<V  
mergeSort(data,temp,0,data.length-1); BLFdHB.$T  
} =|9!vzG4  
I 6O  
private void mergeSort(int[] data, int[] temp, int l, int r) { b MBLXk  
int i, j, k; d'ifLQ\  
int mid = (l + r) / 2; 1H9!5=Ff  
if (l == r) z!\*Y =e  
return; r|Z{-*`  
if ((mid - l) >= THRESHOLD) /V By^L:  
mergeSort(data, temp, l, mid); ABkl%m6xf  
else "jCu6Rjd  
insertSort(data, l, mid - l + 1); _ dg\\c  
if ((r - mid) > THRESHOLD) WzWX E(  
mergeSort(data, temp, mid + 1, r); U!]dEW|G  
else 0 "#HJA44  
insertSort(data, mid + 1, r - mid); .]Z"C&"N]  
|?9HU~B  
for (i = l; i <= mid; i++) { L.IlBjD  
temp = data; ! P4*+')M  
} 2zpr~cB=  
for (j = 1; j <= r - mid; j++) { DwF hK*  
temp[r - j + 1] = data[j + mid]; @|!z9Y*  
} Z:gyz$9w  
int a = temp[l]; Va8&Z  
int b = temp[r]; JS77M-Ac  
for (i = l, j = r, k = l; k <= r; k++) { 6C)_  
if (a < b) { xD$\,{  
data[k] = temp[i++]; .C(tMF]D,  
a = temp; 8Y?;x}  
} else { X?Au/  
data[k] = temp[j--]; 'q.!|G2U  
b = temp[j]; B<-Wea  
} (.,G=\!  
} Ca\6vR  
} ,?3G;-  
z{>Rc"%\  
/** GthYzd:'hJ  
* @param data Ho%CDz z  
* @param l Gh$^{  
* @param i I:.s_8mH}  
*/ %znc##j)q  
private void insertSort(int[] data, int start, int len) { v,t:+ !8  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g&.=2uP  
} ]f3>-)$*  
} PW4q~rc=:  
} ntY]SK%Z  
} |hQ;l|SWg  
aDCwI:Li(  
堆排序: v>56~AJ  
1eKT^bgM  
package org.rut.util.algorithm.support; 4\i[m:e=@  
/O9EQPm(  
import org.rut.util.algorithm.SortUtil; KmF]\:sMD  
E.f%H(b  
/** Ep}s}Stlr}  
* @author treeroot uw7zWJ n  
* @since 2006-2-2 tVjsRnb{  
* @version 1.0 M(fTKs  
*/ s@C}P  
public class HeapSort implements SortUtil.Sort{ =Sv/IXX\di  
YK\X+"lB  
/* (non-Javadoc) ])!*_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /( LL3cZK  
*/ `x|?&Ytmf9  
public void sort(int[] data) { p#Bi>/C6  
MaxHeap h=new MaxHeap(); Z ]ONh  
h.init(data); <}LC~B!  
for(int i=0;i h.remove(); ;PH~<T  
System.arraycopy(h.queue,1,data,0,data.length); #1[u (<AS  
} =QsYXK7Mn4  
=T_g}pu  
private static class MaxHeap{ a9G8q>h]O  
4m)n+ll  
void init(int[] data){ [gB+C84%%  
this.queue=new int[data.length+1]; F\! `/4  
for(int i=0;i queue[++size]=data; {8aTV}Ha2  
fixUp(size); B1STGL`nK  
} ix$bRdl  
} _j3fAr(V  
|{8Pb3#U  
private int size=0; 626r^c=  
{8OCXus3m  
private int[] queue; |^aKs#va  
kP"9&R`E  
public int get() { yjAL\U7`T  
return queue[1]; l ,8##7  
} MPV5P^@X  
A's{j7  
public void remove() { g){<y~Mk  
SortUtil.swap(queue,1,size--); RZ7@cQY  
fixDown(1); ys~x $  
} 6 r"<jh#  
file://fixdown ise-O1'  
private void fixDown(int k) { "fI6Cpc  
int j; '%D7C=;^  
while ((j = k << 1) <= size) { c:0L+OF}xY  
if (j < size %26amp;%26amp; queue[j] j++; _L PHPj^Pg  
if (queue[k]>queue[j]) file://不用交换 w@b)g  
break; (?c-iKGc  
SortUtil.swap(queue,j,k); pGZ8F  
k = j; G9lUxmS<  
} 7"mc+QOp  
} Zh,71Umz  
private void fixUp(int k) { g ?k=^C  
while (k > 1) { IU[ [ H#  
int j = k >> 1; #jk_5W  
if (queue[j]>queue[k]) >bxS3FCX  
break; `g,..Ns-r  
SortUtil.swap(queue,j,k); Ngwb Q7)  
k = j; [~ fraK,)  
} R@0R`Zs  
} p[-O( 3Y  
Jv i#)  
} rZF*q2?  
:t[_:3@  
} KP"+e:a%  
Rv=YFo[B  
SortUtil: Vj-h;rB0z  
Th%zn2R B  
package org.rut.util.algorithm; >V937  
yuVs YV@"  
import org.rut.util.algorithm.support.BubbleSort; GmG 5[?)  
import org.rut.util.algorithm.support.HeapSort; AdmC&!nH  
import org.rut.util.algorithm.support.ImprovedMergeSort; :+Z%; Dc  
import org.rut.util.algorithm.support.ImprovedQuickSort; 6mE\OS-I  
import org.rut.util.algorithm.support.InsertSort; >Q/Dk7#  
import org.rut.util.algorithm.support.MergeSort; VQs5"K"  
import org.rut.util.algorithm.support.QuickSort; GeqPRah  
import org.rut.util.algorithm.support.SelectionSort; :Al!1BJQ  
import org.rut.util.algorithm.support.ShellSort; 5bIw?%dk(  
SKtrtm  
/** OVJ0}5P*  
* @author treeroot ~dSr5LUD  
* @since 2006-2-2 =-T]3!   
* @version 1.0 fox6)Uot  
*/ yX5\gO6G  
public class SortUtil { FlQGg VN  
public final static int INSERT = 1; @c#(.=  
public final static int BUBBLE = 2; 7P T{lT  
public final static int SELECTION = 3; *I+Q~4  
public final static int SHELL = 4; ==B6qX8T  
public final static int QUICK = 5; ,I9bNO,%JK  
public final static int IMPROVED_QUICK = 6; BWNi [^]  
public final static int MERGE = 7; >eaaaq9B-  
public final static int IMPROVED_MERGE = 8; so; ]&  
public final static int HEAP = 9;  bLL2  
\^LFkp  
public static void sort(int[] data) { <$YlH@;)`a  
sort(data, IMPROVED_QUICK); Lr+$_ t}r  
} u ?"Vm  
private static String[] name={ #z(]xI)"  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6LZCgdS{  
}; H+#FSdy#  
*v`eUQ:  
private static Sort[] impl=new Sort[]{ Kq!3wb;  
new InsertSort(), }b}m3i1  
new BubbleSort(), jCY %|  
new SelectionSort(), vX>)je5#  
new ShellSort(), {I ((p_  
new QuickSort(), _GPe<H  
new ImprovedQuickSort(), <%^&2UMg  
new MergeSort(), *i,%,O96Nz  
new ImprovedMergeSort(), xLE)/}y_7H  
new HeapSort() ,+VGSd  
}; 7^Uv7< pw  
SJLis"8  
public static String toString(int algorithm){ > !JS:5|  
return name[algorithm-1]; TvM~y\s  
} 2eogY#  
[Pp'Ye~K@c  
public static void sort(int[] data, int algorithm) { +t.b` U`-  
impl[algorithm-1].sort(data); xo)P?-  
} ]|@^1we  
"4Nt\WQ  
public static interface Sort { XZf$K_F&M  
public void sort(int[] data); jdN` mosJ  
} YUb_y^B^  
T|$H#n}  
public static void swap(int[] data, int i, int j) { *a)n62  
int temp = data; mv><HqDL1  
data = data[j]; TC('H[ ]  
data[j] = temp; #mT"gs  
} 5-V pJ  
} -LSWmrj  
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