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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。 r=@h}TKv{I  
插入排序: :Q\h'$C  
/hI#6k8o_  
package org.rut.util.algorithm.support; TTy1a:V  
39~fP)  
import org.rut.util.algorithm.SortUtil; C: e}}8i  
/** UbQeN  
* @author treeroot ~@got  
* @since 2006-2-2 kO2im+y  
* @version 1.0 K=06I  
*/ EidIi"sr  
public class InsertSort implements SortUtil.Sort{ V TEyqo2  
T<!`~#kM  
/* (non-Javadoc) Zjo9c{\  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vBM\W%T|d  
*/ ,&)XhO?  
public void sort(int[] data) { K h% x  
int temp; Ud{-H_m+  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); c+4SGWmO  
} "?avb`YU'  
} (<%i8xu 2  
} lbv, jS  
< W&~tVv  
} (iWNvVGS  
W:EXL@  
冒泡排序: n\cP17dr  
88G[XkL$2  
package org.rut.util.algorithm.support; ;=uHK'{  
rx^pGVyg  
import org.rut.util.algorithm.SortUtil; jq =-Y  
IOmIkx&`GP  
/** pl"|NZz 7;  
* @author treeroot BY \p?79  
* @since 2006-2-2 y?5*K  
* @version 1.0 }3?M0:  
*/ @H{$,\\  
public class BubbleSort implements SortUtil.Sort{ Nw|Lrn*h!  
rp1 u  
/* (non-Javadoc) IFv2S|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j|? bva\  
*/ 1/#N{rZ  
public void sort(int[] data) { MGmtA(  
int temp; 9:=a FP  
for(int i=0;i for(int j=data.length-1;j>i;j--){ J-\b?R a  
if(data[j] SortUtil.swap(data,j,j-1); 8{d`N|k  
} 1W/= =+%I  
} S?8q.59  
} F48`1+  
} BB|{VwN  
m?M(79u[  
} Zn9w1ev  
JL(*peeu3  
选择排序: zBjqYqZ<+  
ueWG/`ig  
package org.rut.util.algorithm.support; @*2FG\c<  
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import org.rut.util.algorithm.SortUtil; G: @gO2(D  
s V77WF  
/** XhIgzaGVu  
* @author treeroot ^ePSI|EW  
* @since 2006-2-2 WVo%'DtF`  
* @version 1.0 ZE=~ re  
*/ L)w& f  
public class SelectionSort implements SortUtil.Sort { 2"i<--Y  
a7d782~  
/* }RoM N$r  
* (non-Javadoc) WQK#&r*  
* !w/~dy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Z14l0iZ%d  
*/ ucA6s:!={  
public void sort(int[] data) { 1C|j<w=i  
int temp; ]1Q\wsB  
for (int i = 0; i < data.length; i++) { 3cfkJ|fuwe  
int lowIndex = i; O%+:fJz6wI  
for (int j = data.length - 1; j > i; j--) { m&$H ?yXW>  
if (data[j] < data[lowIndex]) { Z-vzq;  
lowIndex = j; ,,G0}N@7s  
} U2Ur N?T  
} HV?awc  
SortUtil.swap(data,i,lowIndex); AN.`tv  
} D(r|sw  
} c9'#G>&h~^  
>?tcL *  
} I &m~ cBj<  
Az)P&*2:'`  
Shell排序: p jrA:;  
}$UuYO/i  
package org.rut.util.algorithm.support; Z]Qm64^I  
?]7ITF  
import org.rut.util.algorithm.SortUtil; [S<DdTY9hZ  
i;\i4MT  
/** Z,d/FC#y(  
* @author treeroot @*c+`5)_  
* @since 2006-2-2 Lv_6Mf(  
* @version 1.0 8XY4  
*/ Q% dpGI  
public class ShellSort implements SortUtil.Sort{ RL&*.r&  
KlrKGmy,)  
/* (non-Javadoc) N.&K"J  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w1GCjD*y  
*/ iYnw?4Y  
public void sort(int[] data) { Y&&Y:+ V  
for(int i=data.length/2;i>2;i/=2){ ! 4s $ 93  
for(int j=0;j insertSort(data,j,i); \XpPb{:>  
} {$s:N&5  
} r] ]Ke_s!  
insertSort(data,0,1); 6}|vfw  
} $OUa3!U_!  
+0=RC^   
/** "@f`O  
* @param data oF*Y$OEu?c  
* @param j 8l}|.Q#--  
* @param i tRXM8't   
*/ N..u<06j/  
private void insertSort(int[] data, int start, int inc) { ^X_%e|  
int temp; ~ h:^Q  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); w6cPd'  
} gF%ad=xm  
} lLg23k{'  
} JTb<uC  
r@!~l1$s`  
} AG9U2x  
bh_ALu^CSX  
快速排序: G!Uq#l>  
cf j6I  
package org.rut.util.algorithm.support; V,Gt5lL&/!  
WK=!<FsC$  
import org.rut.util.algorithm.SortUtil; 2N]y)S_<V  
"7aFVf  
/** ]c5Shj5|p  
* @author treeroot _{ba  
* @since 2006-2-2 $rlIJwqn  
* @version 1.0 :J<S-d=  
*/ bk7miRIB  
public class QuickSort implements SortUtil.Sort{ iFHVr'Og'  
Jz-f1mhQV  
/* (non-Javadoc) iA< EJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 77 `/YE#M  
*/ I%(+tJ  
public void sort(int[] data) { U{R*WB b  
quickSort(data,0,data.length-1); e)iVX<qb  
} o2.! G  
private void quickSort(int[] data,int i,int j){ $DQ -.WI  
int pivotIndex=(i+j)/2; gz88$BT  
file://swap (&x[>):6?  
SortUtil.swap(data,pivotIndex,j); I#mT#xs6  
7 yi>G  
int k=partition(data,i-1,j,data[j]); *&U9npN  
SortUtil.swap(data,k,j); T0SD|'  
if((k-i)>1) quickSort(data,i,k-1); Z$pR_dazU  
if((j-k)>1) quickSort(data,k+1,j); C qxP@  
LCdc7  
} *(HH71Y  
/** 7O{\^Jz1  
* @param data 8+!$k!=X  
* @param i ,~3sba  
* @param j u ) ld  
* @return \twlHj4  
*/ ^6`R:SV4Gx  
private int partition(int[] data, int l, int r,int pivot) { ;m&f Vp  
do{ Jsw<,uT D  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); A1Zu^_y'  
SortUtil.swap(data,l,r); ZWr\v!4  
} \"lzmxe0p  
while(l SortUtil.swap(data,l,r); Z c"]Cv(  
return l; 7_{x '#7  
} 7.=u:PK7kM  
``Nj Nd  
} `=\G>#p<T  
( {8Q=Gh  
改进后的快速排序: 9~4Kbmr>q  
16] O^R;r  
package org.rut.util.algorithm.support; s$]I@;_  
x:@e ID  
import org.rut.util.algorithm.SortUtil; 7N""w5  
K'71uW>  
/** ~#-`Qh  
* @author treeroot 't>Qj7vh0  
* @since 2006-2-2 ZHB'^#b  
* @version 1.0 NyGF57v[M  
*/ 3 $RII -}>  
public class ImprovedQuickSort implements SortUtil.Sort { !Q?4sAB  
> Euput\  
private static int MAX_STACK_SIZE=4096; g_}@/5?y  
private static int THRESHOLD=10; 1.>` h:  
/* (non-Javadoc) ,= PDL  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X~j A*kmAj  
*/ ~ PPGU1  
public void sort(int[] data) { -Pvt+I>  
int[] stack=new int[MAX_STACK_SIZE]; {=(4  
A,iXiDb3pK  
int top=-1; w}E?FEe.  
int pivot; 1]kk  
int pivotIndex,l,r; a`{'u)@  
;1y\!f3#V~  
stack[++top]=0; sG}9l1  
stack[++top]=data.length-1; O_:Q#  
3 C[ ;2  
while(top>0){ X)|%[aX}q  
int j=stack[top--]; o3`Z@-.G  
int i=stack[top--]; 5jV]{ZV#  
T xN5K`q  
pivotIndex=(i+j)/2; (+ >n/I6  
pivot=data[pivotIndex]; 3b_#xr-  
]>:>":<:  
SortUtil.swap(data,pivotIndex,j); LZ@^ A]U  
}^iE|YKz  
file://partition [F>zM  
l=i-1; n%O`K{86  
r=j; ^X?[zc GE  
do{ ;Joo!CXHO  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); .K0BK)axO  
SortUtil.swap(data,l,r); >0m-S :lk  
} !7w-?1?D  
while(l SortUtil.swap(data,l,r); :_^YEm+A  
SortUtil.swap(data,l,j); 1"e=Zqn$)  
@<AIPla  
if((l-i)>THRESHOLD){ %W c-.E R  
stack[++top]=i; EXzY4D ^  
stack[++top]=l-1; j^k{~]+_^]  
} LQS*/s0  
if((j-l)>THRESHOLD){ NN$`n*;l  
stack[++top]=l+1; dxd}:L~z  
stack[++top]=j; y3xP~]n  
} xq]&XlA:ug  
Z BYmAD  
} j9,X.?Xvx  
file://new InsertSort().sort(data); |)lo<}{  
insertSort(data); Tu"yoF  
} m760K*:i\  
/** T&h|sa(   
* @param data 'R$~U?i8  
*/ FqiK}K.~/  
private void insertSort(int[] data) { jVA xa|S  
int temp; EuAa  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); n1LS*-@  
} u|Ai<2b$  
} }%}eyLm(  
} MRa>@Jn??A  
x 1 _(j  
}  Wi|.Z/  
b!N`@m=  
归并排序: F%Xq}LMd  
VOiphw`  
package org.rut.util.algorithm.support; (kSk bwu  
@3G3l|~>  
import org.rut.util.algorithm.SortUtil; zL{KK9Or  
ffWvrY;j[  
/** 63~i6  
* @author treeroot @!Pq"/  
* @since 2006-2-2 $;">/ "7m  
* @version 1.0 EEaFi 8  
*/ .FC1:y<aO  
public class MergeSort implements SortUtil.Sort{ 5yQgGd)  
H<>x_}&  
/* (non-Javadoc) Sz . _XY^  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3sL#_@+yz  
*/ vbWX`skU  
public void sort(int[] data) { ;^xku%u  
int[] temp=new int[data.length]; Ufk7%`  
mergeSort(data,temp,0,data.length-1); O[m+5+  
} xo*a9H?@  
*L!R4;ubE  
private void mergeSort(int[] data,int[] temp,int l,int r){ n. T [a  
int mid=(l+r)/2; yK{~  
if(l==r) return ; $DQMN  
mergeSort(data,temp,l,mid); r+U-l#Q  
mergeSort(data,temp,mid+1,r); KUp lN1Sy  
for(int i=l;i<=r;i++){ K 4 >d  
temp=data; ?2i``-|Wa  
} s5[ Cr"q7B  
int i1=l; AKHi$Bk  
int i2=mid+1; s*Fmu7o43  
for(int cur=l;cur<=r;cur++){ 2yN~[, L  
if(i1==mid+1) 68D.Li  
data[cur]=temp[i2++]; /1^%32c  
else if(i2>r) [k.<x'#  
data[cur]=temp[i1++]; v3[ 2!UXq  
else if(temp[i1] data[cur]=temp[i1++]; 7N:,F9V<  
else #-{4 Jx  
data[cur]=temp[i2++]; h  qxe  
} t#d~gBe?V  
} )UxF lp;\  
oZIoY*7IrQ  
} jKtbGVZ 7r  
]v+\v re  
改进后的归并排序: 8'f:7KF  
Xl}>mbB  
package org.rut.util.algorithm.support; {? 6]_J  
Xf.SJ8G  
import org.rut.util.algorithm.SortUtil; _kar5B$  
-m-~  
/** /|>z7#?m^  
* @author treeroot ('>!dXA$  
* @since 2006-2-2 <8'}H`w%  
* @version 1.0 [rf.P'p%  
*/ 'Yj/M  
public class ImprovedMergeSort implements SortUtil.Sort { f):|Ad|  
B>JRta;hj  
private static final int THRESHOLD = 10; D V C};  
a*o=,!  
/* UD .$C  
* (non-Javadoc) b2ZKhS8  
* V RT| OUq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |J8c|h<  
*/ 5I@< 6S&X  
public void sort(int[] data) { vQ 5 p  
int[] temp=new int[data.length]; 0Pbv7)=XL  
mergeSort(data,temp,0,data.length-1); 2o6%P}C  
} LB-4/G$  
?a(ApD\  
private void mergeSort(int[] data, int[] temp, int l, int r) { 4D0"Y #&G  
int i, j, k; 9CxU: ;3  
int mid = (l + r) / 2; @ UX'(W  
if (l == r) -MeGJX:^I  
return; {Z$Aw4a"d  
if ((mid - l) >= THRESHOLD) dMYDB  
mergeSort(data, temp, l, mid); -cOLg rmp  
else A5z5e# ,u  
insertSort(data, l, mid - l + 1); N U\B  
if ((r - mid) > THRESHOLD) rZ *}jD[  
mergeSort(data, temp, mid + 1, r); !hEt UF  
else t}]=5)9<  
insertSort(data, mid + 1, r - mid); 4s%vx]E  
g&X$)V4C  
for (i = l; i <= mid; i++) { >DPC}@Wl  
temp = data; XZ}]H_, n  
} +Y6=;*j$  
for (j = 1; j <= r - mid; j++) { 3u _[=a  
temp[r - j + 1] = data[j + mid]; 6gNsh  
} Il,2^54q  
int a = temp[l]; iJT_*,P^  
int b = temp[r]; j0>Q:hn  
for (i = l, j = r, k = l; k <= r; k++) { DFcgUEq  
if (a < b) { UXvUU^k"v  
data[k] = temp[i++]; VMZ\9IwI  
a = temp; ,eW K~ pa  
} else { lmf vT}$B  
data[k] = temp[j--]; "@#^/m)  
b = temp[j]; Et}S*!IS  
} `8/K+ e`  
} 9'Le}`Gf  
} W9+H /T7!  
-XRn%4EX?  
/** ,( u- x!  
* @param data I6S!-i  
* @param l +`}QIp0  
* @param i NO+.n)etGb  
*/ JZ3CCf  
private void insertSort(int[] data, int start, int len) { %-1-y]R|  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m:SG1m_6  
} zk#"n&u0  
} r~nD%H:}P  
} `tw[{Wb  
} B:J([@\'  
V"K-aO&  
堆排序: XYj!nx{k,  
])`w_y(>  
package org.rut.util.algorithm.support; % Ya%R@b}  
W8,4LxH  
import org.rut.util.algorithm.SortUtil; Ve)P/Zz}^  
GJS3O;2*  
/** D~P3~^  
* @author treeroot hg4d]R,  
* @since 2006-2-2 tpPP5C{  
* @version 1.0 RUco3fZ   
*/ zZp0g^;.?  
public class HeapSort implements SortUtil.Sort{ Di) %vU  
3b{ 7Z 2  
/* (non-Javadoc) Sqn|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /<C}v~r  
*/ ut j7"{'k|  
public void sort(int[] data) { 1K{u>T  
MaxHeap h=new MaxHeap(); 71b0MHNkvv  
h.init(data); }$%j}F{  
for(int i=0;i h.remove(); 3u[m? Vw  
System.arraycopy(h.queue,1,data,0,data.length); X} {z7[  
} e%[0 NVo  
Q3"{v0  
private static class MaxHeap{ b'r</ncZ  
! [3  /!  
void init(int[] data){ ?qC6p|H  
this.queue=new int[data.length+1]; 00SYNG!  
for(int i=0;i queue[++size]=data; `)~]3zmG  
fixUp(size); u:]c  
} c~``)N  
} $;iMo/  
c!0u,6  
private int size=0; Ms=5*_J2Jk  
_ ck)yY?7  
private int[] queue; 11VtC)  
`^v=*&   
public int get() { S4 j5-  
return queue[1]; Nwwn #+  
} )fy-]Ky *  
r{>`"  
public void remove() { `uP:UQ9S  
SortUtil.swap(queue,1,size--); =Gv*yR*]t  
fixDown(1); ~%chF/H  
} _"%hcCMw  
file://fixdown d4~;!#<  
private void fixDown(int k) { - f?8O6e  
int j; XQ3"+M_KG  
while ((j = k << 1) <= size) { ]J1oY]2~  
if (j < size %26amp;%26amp; queue[j] j++; yopC <k  
if (queue[k]>queue[j]) file://不用交换 5bB\i79$  
break; &x9>8~   
SortUtil.swap(queue,j,k); fV#,<JG  
k = j; DHq#beN  
} l*>,K2F  
} 8KyRD1 (-R  
private void fixUp(int k) { '\O[j*h^.  
while (k > 1) { ]z#+3DaH  
int j = k >> 1; w!dgIS$  
if (queue[j]>queue[k]) ,xw1B-dx  
break; _`I}"`2H  
SortUtil.swap(queue,j,k); LD*XNcE  
k = j; WKAG)4  
} ;9CbioO  
} a,|Hn  
{j6$'v)0  
} 3Ofh#|qc&  
bey:Qj??  
} %*zV&H   
r.q*S4IS.m  
SortUtil: Qz"+M+~%&  
3D-0 N0o  
package org.rut.util.algorithm; w/z o  
\ 5.nr*5  
import org.rut.util.algorithm.support.BubbleSort; pwH*&YU  
import org.rut.util.algorithm.support.HeapSort; J!Q #xs  
import org.rut.util.algorithm.support.ImprovedMergeSort; 9a2[_Wy  
import org.rut.util.algorithm.support.ImprovedQuickSort; XJ!?>)N .  
import org.rut.util.algorithm.support.InsertSort; )1 f%kp#]  
import org.rut.util.algorithm.support.MergeSort; ]]o?!NX  
import org.rut.util.algorithm.support.QuickSort; Kf-XL ),3l  
import org.rut.util.algorithm.support.SelectionSort; o|$r;<o3R  
import org.rut.util.algorithm.support.ShellSort; .p =OAh<  
GrUpATIx  
/** |<Y~\ |  
* @author treeroot `_k_}9Fr  
* @since 2006-2-2 %+htA0aX  
* @version 1.0 KPVu-{_Fi  
*/ 6FYL},.R  
public class SortUtil { TMGYNb%<bX  
public final static int INSERT = 1; RBz"1hRo`  
public final static int BUBBLE = 2; <5E)6c_W)  
public final static int SELECTION = 3; e*}*3kw)T  
public final static int SHELL = 4; R$ !]z(  
public final static int QUICK = 5; ]4ck)zlv   
public final static int IMPROVED_QUICK = 6; w~_ycY.e  
public final static int MERGE = 7; *LMzq9n3o  
public final static int IMPROVED_MERGE = 8; h<V,0sZ&:  
public final static int HEAP = 9; ]- 6q`'?[  
%"cOX  
public static void sort(int[] data) { k')H5h+Q=  
sort(data, IMPROVED_QUICK); [,MaAB  
} YZ]}l%e  
private static String[] name={ g&S> Wq%L  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LGw-cX #  
}; H<}|n1w<  
mzCd@<T,  
private static Sort[] impl=new Sort[]{ );T&pm:C>  
new InsertSort(), TMD\=8Na  
new BubbleSort(), ,RDWx  
new SelectionSort(), 9_?<T;]"  
new ShellSort(), _M&n~ r  
new QuickSort(), 7Vk9{x$z  
new ImprovedQuickSort(), rizjH+  
new MergeSort(), MQDLC7Y.p5  
new ImprovedMergeSort(), 7O8 @T-f+2  
new HeapSort() $}IG+ ,L  
}; ju5o).!bg  
EXF]y}n  
public static String toString(int algorithm){ _xH<R  
return name[algorithm-1]; QOgGL1)7-  
} r@zs4N0WP  
H "Io!{aKU  
public static void sort(int[] data, int algorithm) { \crh`~?>  
impl[algorithm-1].sort(data); A9g/At_  
} 33KCO  
(f^/KB=  
public static interface Sort { !vSq?!y6*P  
public void sort(int[] data); tAo$; |  
} :{^~&jgL  
dGj0;3FI%  
public static void swap(int[] data, int i, int j) { ?hAO-*);  
int temp = data; $9j>oUG  
data = data[j]; FaWDAL=Vhk  
data[j] = temp; |QF_E4ISD  
} bI3GI:hp  
} 3M(*q4A$"  
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