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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。 m&H@f:  
插入排序: ItZqLUJ m  
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package org.rut.util.algorithm.support; wi]F\ q"Y^  
J8T?=%?=  
import org.rut.util.algorithm.SortUtil; _dT,%q  
/** W+&w'~M  
* @author treeroot ~ cKmf]  
* @since 2006-2-2 eJ+uP,$  
* @version 1.0 }K!)Z}8  
*/ b-1cA1#_cP  
public class InsertSort implements SortUtil.Sort{ !NNq(t  
dJZMzn  
/* (non-Javadoc) J~6-}z   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >&|C E2'  
*/ _7AR2  
public void sort(int[] data) { BnLM;5 >  
int temp; ? (&)p~o  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); /5ngPHy&  
} 36<PI'l#~  
} C>d_a;pX  
} z8SrZ#mg  
/mb?C/CI  
} ;$Eg4uX  
@w)Vt $+b]  
冒泡排序: 1CkBfK  
0i[,`>-Av  
package org.rut.util.algorithm.support; /e^q>>z  
XNwZSW  
import org.rut.util.algorithm.SortUtil; .kl _F7  
]*8K4n G  
/** N{}XHA  
* @author treeroot f_*Bd.@  
* @since 2006-2-2 1N#KVvK  
* @version 1.0 8\+Q*7~@i  
*/ Jon<?DQj  
public class BubbleSort implements SortUtil.Sort{ ohFUy}y  
- I$qe Xy  
/* (non-Javadoc) 6gLk?^.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t,mD{ENm&  
*/ y{.s 4NT  
public void sort(int[] data) { B?qLXRv  
int temp; $YM>HZe-  
for(int i=0;i for(int j=data.length-1;j>i;j--){  Pa .D+  
if(data[j] SortUtil.swap(data,j,j-1); OC$Y8Ofr  
} pg\Ylk"T  
} Q3t9J"=1g  
} ZSKSMI%D  
} 0-ISOA&  
9V]\,mD=  
} y#'|=0vTvP  
V^a] @GK:  
选择排序: LV4]YC  
}1ABrbc  
package org.rut.util.algorithm.support; @S/jVXA  
;]* %wX  
import org.rut.util.algorithm.SortUtil; H\OV7=8  
[ 7W@/qqv  
/** gK{-eS  
* @author treeroot ^f:oKKaAW;  
* @since 2006-2-2 qSRE)C=)  
* @version 1.0 (x{6N^J.t  
*/ RR u1/nam  
public class SelectionSort implements SortUtil.Sort { 1LbJR'}  
<,%qt_ !  
/* G@Z,Hbgm  
* (non-Javadoc) N`FgjnQ`  
* "XWrd [Df  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CNCWxu  
*/ Cv@ZzILyoK  
public void sort(int[] data) { .w/_Om4T*b  
int temp; K:!|xr(1d  
for (int i = 0; i < data.length; i++) { `'Fz :i  
int lowIndex = i; A4lh`n5%  
for (int j = data.length - 1; j > i; j--) { -6(u09mb_  
if (data[j] < data[lowIndex]) { )z'LXy8  
lowIndex = j; |K(j}^1k  
} sb"etc`w%-  
} y^vB_[6l  
SortUtil.swap(data,i,lowIndex); -nbo[K  
} 86c@Kk7z  
} 8+ P)V4}  
f%Y'7~9bA  
} a?4'',~  
Nwu,:}T  
Shell排序: }g1V6 `8&  
%#!`>S)O  
package org.rut.util.algorithm.support; 6Z:<?_p%7g  
y\]~S2}G  
import org.rut.util.algorithm.SortUtil; "0JG96&\  
%F'*0<  
/** 7^}np^[HB  
* @author treeroot Y`5(F>/RQG  
* @since 2006-2-2 h|^RM*x  
* @version 1.0 Zi&qa+F  
*/ Nf.6:=  
public class ShellSort implements SortUtil.Sort{ 'l+).},  
W\V'o Vt  
/* (non-Javadoc) M_wqb'=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cO9aT  
*/ `:hEc<_/  
public void sort(int[] data) { ZJCD)?]=3  
for(int i=data.length/2;i>2;i/=2){ V87?J w%2  
for(int j=0;j insertSort(data,j,i); y8=(k}=3  
} vs3px1Xe#  
} Xr54/.{&@  
insertSort(data,0,1); zJE$sB.f  
} l+e L:C!  
1bW[RK;GE  
/** 7,.Hj&'B  
* @param data 2b|$z"97jj  
* @param j %d..L-`]ET  
* @param i  >'>onAIL  
*/ 8cqH0{  
private void insertSort(int[] data, int start, int inc) { 3l?D%E]P  
int temp; )<w`E{q  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Y|eB;Dm1q  
} /s91[n(d  
} }pP<+U  
} 9G7lPK  
+8tdAw  
} 86[/NTD<-  
,2H@xji [  
快速排序: mez )G|  
[ugBVnma  
package org.rut.util.algorithm.support; fmuAX w>  
QLx]%E\  
import org.rut.util.algorithm.SortUtil; s bf\;_!  
FBn`sS8hH  
/** Ep/kb-~-  
* @author treeroot [nQ<pTg~r  
* @since 2006-2-2 N1dp%b9W(  
* @version 1.0 9cJzL"yi  
*/ ]s3U+t?  
public class QuickSort implements SortUtil.Sort{ i #5rk(^t  
h{s- e.  
/* (non-Javadoc) j7&57'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $ b Q4[  
*/ ^rz8c+ly  
public void sort(int[] data) { x.Sq2rw]V  
quickSort(data,0,data.length-1); SDY!!.  
} qPJU}(9#B  
private void quickSort(int[] data,int i,int j){ SiN22k+  
int pivotIndex=(i+j)/2;  yQkj4v{  
file://swap Jvysvi{8  
SortUtil.swap(data,pivotIndex,j); %G~ f>  
cN/8 b0C  
int k=partition(data,i-1,j,data[j]); 9(.P2yO  
SortUtil.swap(data,k,j); < * )u\A  
if((k-i)>1) quickSort(data,i,k-1); F8(6P1}E  
if((j-k)>1) quickSort(data,k+1,j); \}O'?)(1  
ZJL[#}*  
} . }QR~IR'  
/** gAcXd<a0  
* @param data X@$x(Zc  
* @param i %]/O0#E3Kz  
* @param j &yFt@g]  
* @return ~(2G7x)  
*/ &"vh=Z-  
private int partition(int[] data, int l, int r,int pivot) { "Dbjp5_  
do{ [C@0&[[  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); oM`[&m.,  
SortUtil.swap(data,l,r); s`2Hf&%aZJ  
} dpHK~n j\_  
while(l SortUtil.swap(data,l,r); W~ 6ii\  
return l; MV"aO@  
} lNtZd?=>  
]AlRu(  
} 7r=BGoA2E  
bAIo5lr  
改进后的快速排序: +" 4E:9P?  
GT|=Kx$;  
package org.rut.util.algorithm.support; f_}FYeg  
=Z ^=  
import org.rut.util.algorithm.SortUtil; S^}@X?v  
$<jI<vD+:  
/** @+LZSd+I  
* @author treeroot cwK 6$Ax  
* @since 2006-2-2 @pueM+(L&  
* @version 1.0 b"-eQb  
*/ p#:.,;  
public class ImprovedQuickSort implements SortUtil.Sort { p s:|YR  
U0}]3a0  
private static int MAX_STACK_SIZE=4096; 4%#C _pE9  
private static int THRESHOLD=10; :cv_G;?  
/* (non-Javadoc) C^]y iR-U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5;=,BWU  
*/ I2JE@?  
public void sort(int[] data) { ?(Dk{-:T'  
int[] stack=new int[MAX_STACK_SIZE]; RC5b'+E&#  
t\2Lo7[Pu  
int top=-1; 1n7tmRl  
int pivot; q5il9*)d (  
int pivotIndex,l,r; V!=1 !"}OG  
AhOvI {  
stack[++top]=0; g%1FTl  
stack[++top]=data.length-1; rf.w}B;V;  
HhfuHZ<  
while(top>0){ 3cK`RM `  
int j=stack[top--]; 8NLTq|sW  
int i=stack[top--]; }a= &o6=  
/`yb75  
pivotIndex=(i+j)/2; =k]RzeI  
pivot=data[pivotIndex]; <5*cc8  
eup#.#J  
SortUtil.swap(data,pivotIndex,j); ]kC/b^~+m  
^hOnLy2  
file://partition j'lfH6_')e  
l=i-1; K9Dxb  
r=j; "T4Z#t  
do{ kJP fL s  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); p;av63 i  
SortUtil.swap(data,l,r); |ToCRM  
} a@_.uD  
while(l SortUtil.swap(data,l,r); 3rX5haD\  
SortUtil.swap(data,l,j); &E.ckWf  
Cg NfqT0  
if((l-i)>THRESHOLD){ %h;~@-$  
stack[++top]=i; 3{o5AsVv  
stack[++top]=l-1; =VkbymIZ4y  
} BR5r K  
if((j-l)>THRESHOLD){ cPe0o'`[  
stack[++top]=l+1; ;c"T#CH.  
stack[++top]=j; yP\KIm!  
}  WTi8  
> t *+FcD  
} F)4Y;;#  
file://new InsertSort().sort(data); F0 WM&{v  
insertSort(data); ?[Xv(60]  
} F3/aq+<P[  
/** .L'>1H]B  
* @param data `9SRiy  
*/ j`1% a]Bwc  
private void insertSort(int[] data) { h%MjVuLn  
int temp; w4Nm4To  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ] dB6--  
} YUdCrb9F  
} COJny/FT|  
} zrYhx!@  
FCxLL"))  
} 1t{h)fwi  
ikf6Y$nWfF  
归并排序: 4f/2gI1@B  
q h;ahX~  
package org.rut.util.algorithm.support; h?[3{Z^  
5tI4m#y2  
import org.rut.util.algorithm.SortUtil; 0,*clvH\;  
tW;?4}JR  
/** / *J}7  
* @author treeroot *Iv.W7 [  
* @since 2006-2-2 Z_{`$nW  
* @version 1.0 Z3E957}  
*/ =pQA!u]QE  
public class MergeSort implements SortUtil.Sort{ w7NJ~iy  
&!uw;|%  
/* (non-Javadoc) x]|8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =qH9<,p`H  
*/ ,Oojh;P_  
public void sort(int[] data) { =)}m4,LA  
int[] temp=new int[data.length]; y\L$8BSL  
mergeSort(data,temp,0,data.length-1); ^b=]=w  
} \ZiZ X$  
`k~.>#  
private void mergeSort(int[] data,int[] temp,int l,int r){ (.Tkv Uj`  
int mid=(l+r)/2; ro{q':Z3  
if(l==r) return ; ^zn j J\  
mergeSort(data,temp,l,mid); a86m?)-c  
mergeSort(data,temp,mid+1,r); W!B4~L  
for(int i=l;i<=r;i++){ MJ^NRT0?b  
temp=data; $P#Cf&R  
} idiJ|2T"G  
int i1=l; !{5jP|vo  
int i2=mid+1; 9An_zrJ%i  
for(int cur=l;cur<=r;cur++){ t/z]KdK P  
if(i1==mid+1) K$_Rno"  
data[cur]=temp[i2++]; |0nbO2}  
else if(i2>r) g;)xf?A9q  
data[cur]=temp[i1++]; Fhw:@@=  
else if(temp[i1] data[cur]=temp[i1++]; 3\FPW1$i|[  
else nnLE dJ}n  
data[cur]=temp[i2++]; DArEIt6Q  
} >o #^r;  
} Pnq[r2#]:  
I,dH\]^h=  
} ]|g{{PWH  
QW :-q(s  
改进后的归并排序: M##h<3I  
a x1  
package org.rut.util.algorithm.support; >Ya+#j~CZ  
5^'PjtW6  
import org.rut.util.algorithm.SortUtil; W,Q"?(+]B  
=)5eui>{  
/** VQE8hQ37  
* @author treeroot 'T@K$xL8  
* @since 2006-2-2 Omo1p(y  
* @version 1.0 vU Bk oC2Q  
*/ ]F5?>du@~  
public class ImprovedMergeSort implements SortUtil.Sort { q,-bw2   
+P,hT  
private static final int THRESHOLD = 10; UlQZw*ce  
p~1,[]k  
/* nW2 fB8yq  
* (non-Javadoc) + 5E6|  
* D*3\4=6x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]0P-?O:  
*/ 3Gi#WV4$  
public void sort(int[] data) { _ +Ww1 f  
int[] temp=new int[data.length]; >-rDBk ;K  
mergeSort(data,temp,0,data.length-1); \(Z'@5vC  
} A,-UW+:  
X8l[B{|  
private void mergeSort(int[] data, int[] temp, int l, int r) { 5]cmDk  
int i, j, k; Nzj7e 1=  
int mid = (l + r) / 2; GKdQ  
if (l == r) LY}%|w  
return; 8 PI>Q  
if ((mid - l) >= THRESHOLD) 0-#SvTf>;:  
mergeSort(data, temp, l, mid); 9`4mvK/@  
else O~yPe.  
insertSort(data, l, mid - l + 1); HV'xDy[)  
if ((r - mid) > THRESHOLD) 8 _0j^oh  
mergeSort(data, temp, mid + 1, r); i)fAm$8# G  
else @czNiWU"4;  
insertSort(data, mid + 1, r - mid); hX4&B  
jSVIO v:  
for (i = l; i <= mid; i++) { TJ9JIxnS  
temp = data; D?~`L[}I!}  
} tqyR~  
for (j = 1; j <= r - mid; j++) { >#).3  
temp[r - j + 1] = data[j + mid]; IB#L5yN r  
} GkqKIs  
int a = temp[l]; u50 o1^<X  
int b = temp[r]; ` MIZqHM @  
for (i = l, j = r, k = l; k <= r; k++) { R}lS@w1  
if (a < b) { xab1`~%K  
data[k] = temp[i++]; E O^j,x g  
a = temp; wi/Fx=w  
} else { l;^Id#N  
data[k] = temp[j--]; *gMo(-tN  
b = temp[j]; _jt>%v4}4  
} SwHrHj  
} Xy[O  
} /IS_-h7>XS  
b^b@W^\hn  
/** 7i?"akr4  
* @param data c p.c$  
* @param l q_PxmPE@3v  
* @param i vd`;(4i#X  
*/ A?[06R5E#  
private void insertSort(int[] data, int start, int len) { `l+{jrRb<  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TZ8:3ti  
} 3>FeTf#:  
} Dizc#!IGU  
} .Bxv|dji  
} #(6^1S%  
(ZR+(+i,  
堆排序: T:$a x  
1fwjW0t  
package org.rut.util.algorithm.support; h:{rjXK  
R7%' v Zk  
import org.rut.util.algorithm.SortUtil; i?" ~g!A  
" %$jl0i_c  
/** ( )K,~  
* @author treeroot It$'6HV~Sb  
* @since 2006-2-2 1&%6sZN  
* @version 1.0 K,f*}1$qM  
*/ r(=  
public class HeapSort implements SortUtil.Sort{ c^$_epc*  
dq d:V$o  
/* (non-Javadoc) rH@ {[~p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z0=(l?)#  
*/ cm`Jr#kl{  
public void sort(int[] data) { =[]V$<G'w{  
MaxHeap h=new MaxHeap(); 9eOP:/'}w  
h.init(data); \@IEqm6  
for(int i=0;i h.remove(); PvW {g5)S  
System.arraycopy(h.queue,1,data,0,data.length); J_PAWW  
} PuyJ:#a  
GQ=Zp3[  
private static class MaxHeap{ uL!QeY>k\  
byALM  
void init(int[] data){ -J7BEx  
this.queue=new int[data.length+1]; }4'5R  
for(int i=0;i queue[++size]=data; KtTlc#*KU  
fixUp(size); k:1p:&*m  
} KO*# ^+g  
} gumT"x .^  
=j,2  
private int size=0; ']Q4SB"q  
m/ D ~D~  
private int[] queue; mab921-n  
S5o\joc  
public int get() { !e>+ O^  
return queue[1]; B49: R >  
} }STTDq4  
XPJsnu  
public void remove() { n1yIQ8F  
SortUtil.swap(queue,1,size--); FA5|`  
fixDown(1); c? Z M<Y"  
} j@g`Pm%u`  
file://fixdown c5 ^CWk K  
private void fixDown(int k) { q!L@9&KAQ  
int j; .D X  
while ((j = k << 1) <= size) { /x2-$a:<  
if (j < size %26amp;%26amp; queue[j] j++; 2A>s a3\  
if (queue[k]>queue[j]) file://不用交换 j p"hbV  
break; 4F[4H\>'  
SortUtil.swap(queue,j,k); "2l$}G  
k = j; $<NrJgQ  
} {C>E*qp}f  
} w.7p D  
private void fixUp(int k) { ?nf!s J'm  
while (k > 1) { #uRj9|E7  
int j = k >> 1; T`ofj7$:  
if (queue[j]>queue[k]) ( *&E~ g  
break; d76nyQKK  
SortUtil.swap(queue,j,k); X }V}%  
k = j; }}?,({T|n  
} pY~/<lzW  
} \\R$C  
_^%DfMP3i\  
} -- >q=hlA  
U ;%cp  
} F<V.OFt  
2gasH11M  
SortUtil: }xa~U,#5  
" ""k}M2A  
package org.rut.util.algorithm; Y5fz_ [("  
Xp67l!{v  
import org.rut.util.algorithm.support.BubbleSort; ^RI& `5g  
import org.rut.util.algorithm.support.HeapSort; n^lr7(!6  
import org.rut.util.algorithm.support.ImprovedMergeSort; 0 s$;3qE  
import org.rut.util.algorithm.support.ImprovedQuickSort; 7g7[a/Bts  
import org.rut.util.algorithm.support.InsertSort; 7Gwo:s L  
import org.rut.util.algorithm.support.MergeSort; %&iodo,EP'  
import org.rut.util.algorithm.support.QuickSort; 4 (c{%%  
import org.rut.util.algorithm.support.SelectionSort; /R(]hmW  
import org.rut.util.algorithm.support.ShellSort; `R!%k]$  
xqQLri}  
/** ~T^,5Tz1j  
* @author treeroot 0$g;O5y"i  
* @since 2006-2-2 _LSp \{Z  
* @version 1.0 +\R__tx;  
*/ Ur9L8EdC  
public class SortUtil { #E$*PAB  
public final static int INSERT = 1; ?E}9TQ  
public final static int BUBBLE = 2; JP,yRb\  
public final static int SELECTION = 3; :Tcvj5  
public final static int SHELL = 4; @|PUet_pb  
public final static int QUICK = 5; Y@y"bjK \  
public final static int IMPROVED_QUICK = 6; h(K}N5`  
public final static int MERGE = 7; yZV Y3<]  
public final static int IMPROVED_MERGE = 8; e>2KW5.  
public final static int HEAP = 9; Qv W vS9]  
8-"D.b4  
public static void sort(int[] data) { Ya `$.D  
sort(data, IMPROVED_QUICK);  Al1}Ir   
} yvWM]A  
private static String[] name={ ^WkqRs  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SE$~Wbj?  
}; ?,`g h}>  
U4N H9-U'  
private static Sort[] impl=new Sort[]{ dczq,evp  
new InsertSort(), IhHKRb[  
new BubbleSort(), <U y $b4h  
new SelectionSort(), tR\cS )  
new ShellSort(), YB1Jv[  
new QuickSort(), / K(l[M  
new ImprovedQuickSort(), tIT/HG_o  
new MergeSort(), `\r <3?  
new ImprovedMergeSort(), jf.WmiDC  
new HeapSort() y(wb?86#W5  
}; 2f0mr?l)N  
T#\=v(_NR  
public static String toString(int algorithm){ R; ui 4wg6  
return name[algorithm-1]; t$3B#=  
} ]$BC f4:  
;$67GK  
public static void sort(int[] data, int algorithm) { 2fgYcQ8`  
impl[algorithm-1].sort(data); q`3HHq  
} B7wzF"  
=$y;0]7Lwi  
public static interface Sort { i#aKW'  
public void sort(int[] data); 'YJ~~o  
} KF6N P  
{"2Hv;x  
public static void swap(int[] data, int i, int j) { z(u,$vZ _  
int temp = data; `-.6;T}2U  
data = data[j];  nvCp-Z$  
data[j] = temp; rd;E /:`5  
} XmP,3KG2{S  
} |l-O e  
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