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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。 ~e">_;k6  
插入排序: q'G,!];qL  
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package org.rut.util.algorithm.support; " xR[mJ@U  
!%PWig-  
import org.rut.util.algorithm.SortUtil; p!zJ;rh)  
/** p'f%%#I  
* @author treeroot 347eis'  
* @since 2006-2-2 4woO;Gm  
* @version 1.0 AIRr{Y  
*/ 'O?~p55T  
public class InsertSort implements SortUtil.Sort{ ;o-yQmdh  
Y<f_`h^r  
/* (non-Javadoc) 2i7e#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jblj^n?Bm  
*/ F|+W.9  
public void sort(int[] data) { bZ 443SG  
int temp; ROc`BH=  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); @=Fi7M  
} g{:<2xI5P  
} H'=(`  
} 4 !#a3=_  
bb-qO#E  
} JC#>Td  
Sr_VL:Gg  
冒泡排序: )G1P^WV4  
E?)656F[  
package org.rut.util.algorithm.support; ]; Wx  
TsQU6NNE  
import org.rut.util.algorithm.SortUtil; kA wNly  
X"aEJ|y  
/** P\nC?!Q%c  
* @author treeroot g I]GUD-  
* @since 2006-2-2 FFKGd/:!  
* @version 1.0 Dw<k3zaW  
*/ Tr&M~Lgb)  
public class BubbleSort implements SortUtil.Sort{ tBATZ0nK`Q  
1O/ g&u  
/* (non-Javadoc) @A<PkpNL  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :4gLjzL  
*/ Z{6kWA3Kk  
public void sort(int[] data) { @`36ku  
int temp; (la[KqqCO  
for(int i=0;i for(int j=data.length-1;j>i;j--){ _~u2: yl (  
if(data[j] SortUtil.swap(data,j,j-1); 5Por "&%  
} J%lgR  
} !p/%lU65  
} mTNB88p8^D  
} "es?=  
kX`[Y@nUN  
} )0 W`  
y !$alE  
选择排序: ?p<.Fv8.  
F[ ajOb8  
package org.rut.util.algorithm.support; .iMN,+qP  
}Ew hj>w  
import org.rut.util.algorithm.SortUtil; Vwk#qgnX  
%WTEv?I{Ga  
/** uj>WgU  
* @author treeroot SP*fv`  
* @since 2006-2-2 mm[2wfTE  
* @version 1.0 4(6b(]G'#  
*/ DGW+>\G  
public class SelectionSort implements SortUtil.Sort { /S5| wNu  
2*"Fu:a"`I  
/* <f@"HG l  
* (non-Javadoc) goat<\a  
* K~=UUB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,Ys"W x  
*/ <fCKUc  
public void sort(int[] data) { DejA4XdW  
int temp; nJ4pTOc  
for (int i = 0; i < data.length; i++) { 98=wnWX 6$  
int lowIndex = i; BH]Ynu&o  
for (int j = data.length - 1; j > i; j--) { Y!iZW  
if (data[j] < data[lowIndex]) { N7E$G{TT  
lowIndex = j; ;%tF58&  
} !EUan  
} Zo1,1O  
SortUtil.swap(data,i,lowIndex); 8-<:i  
}  :Gm/  
} T~Q JO0  
Eu"_MgD  
} r.7$&BCng  
=UyLk-P w  
Shell排序: L(&&26Y  
=zQN[  
package org.rut.util.algorithm.support; y;/VB,4V  
z5ij(RE]  
import org.rut.util.algorithm.SortUtil; (vT+IZEI  
2eMTxwt*S  
/** A}eOFu`  
* @author treeroot .^B*e6DAD  
* @since 2006-2-2 D3|I:Xm  
* @version 1.0 M4as  
*/  *6q5S4 r  
public class ShellSort implements SortUtil.Sort{ ]U"94S U:)  
t!RiUZAo  
/* (non-Javadoc) @S|XGf  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #%DE;  
*/ iLSr*` o  
public void sort(int[] data) { B}^w_C2  
for(int i=data.length/2;i>2;i/=2){ 21"1NJzP  
for(int j=0;j insertSort(data,j,i); '- zD  
} X&kp;W  
} Jv^h\~*jH  
insertSort(data,0,1); 41&\mx  
} .9wk@C(Eh_  
'inFKy'H  
/** a\r\PBi  
* @param data rW$[DdFA5{  
* @param j YPxM<Gfa8  
* @param i 1y}Y9mlD.  
*/ A}l3cP; `#  
private void insertSort(int[] data, int start, int inc) { 7Op>i,HZk\  
int temp; Hj}K{20  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); PUUwv_  
} r]6C  
} |p,P46I  
} ~sh`r{0  
7<*yS310  
} q#%xro>m  
9iQq.$A.  
快速排序: J\b^)  
YuO.yh_  
package org.rut.util.algorithm.support; d$1@4r  
x<ZJb  
import org.rut.util.algorithm.SortUtil; VXwU?_4J.  
K|[*t~59  
/** lN Yt`xp  
* @author treeroot X9V*UXTc  
* @since 2006-2-2 xA$XT[D  
* @version 1.0 ) AvN\sC  
*/ Y^wW2-,m  
public class QuickSort implements SortUtil.Sort{ 5j?3a1l0  
J| w>a  
/* (non-Javadoc) GBPo8L"9  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) + R~'7*EI  
*/ R\!2l |_  
public void sort(int[] data) { b0Ps5G\ u  
quickSort(data,0,data.length-1); cQ R]le %(  
} _ 9F9W{'  
private void quickSort(int[] data,int i,int j){ 0Qf,@^zL*  
int pivotIndex=(i+j)/2; u7>],<  
file://swap W')Yg5T  
SortUtil.swap(data,pivotIndex,j); )"7iJb<E  
#Lh;CSS  
int k=partition(data,i-1,j,data[j]); 6a~|K-a6  
SortUtil.swap(data,k,j); 4O^xY 6m  
if((k-i)>1) quickSort(data,i,k-1); vdc\R?  
if((j-k)>1) quickSort(data,k+1,j); <h0?tv]  
A P?R"%  
} c(xrP/yOwi  
/** OrY/`+Cog  
* @param data 2K/4Rf0;  
* @param i Ga^"1TZ x  
* @param j *k.G5>@  
* @return 8V`WO6*  
*/ KPKt^C  
private int partition(int[] data, int l, int r,int pivot) { 3u+T~g0^  
do{ (c=6yV@  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); DEKP5?]  
SortUtil.swap(data,l,r); Nk? ^1n$  
} dy%;W%  
while(l SortUtil.swap(data,l,r); %K=?@M9i  
return l; t%/&c::(6  
} |4;Fd9q^m  
1Y\DJ@lh  
} 6*78cg Io  
k8&;lgO '  
改进后的快速排序: #wwH m3  
q376m-+  
package org.rut.util.algorithm.support; Tztu}t]N  
;"5&b!=t  
import org.rut.util.algorithm.SortUtil; 'uS n}hm  
N2^=E1|_  
/** ohGJ1  
* @author treeroot u&Yz[)+b=g  
* @since 2006-2-2 g[' ^L +hd  
* @version 1.0 vxBgGl  
*/ xX&+WR  
public class ImprovedQuickSort implements SortUtil.Sort { fgp]x&5Q  
n,y ZRY  
private static int MAX_STACK_SIZE=4096; \h/H#j ZJ  
private static int THRESHOLD=10; ]vUwG--*  
/* (non-Javadoc) G:<aB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'x#~'v*  
*/ :'X&bn  
public void sort(int[] data) { C_}]`[  
int[] stack=new int[MAX_STACK_SIZE]; J5K^^RUR  
@1roe G  
int top=-1; pK>N-/?a  
int pivot; XJ;57n-?  
int pivotIndex,l,r; X]TG<r  
Tv,[DI +  
stack[++top]=0; O3,jg |,  
stack[++top]=data.length-1; TQF| a\M'  
UERLtSQ  
while(top>0){ "<N*"euH  
int j=stack[top--]; 8b& /k8i:  
int i=stack[top--]; _`j7clEz  
BA:VPTZq  
pivotIndex=(i+j)/2; e8a+2.!&\  
pivot=data[pivotIndex]; Hk3sI-XkA  
Woy m/[i  
SortUtil.swap(data,pivotIndex,j); Di6?[(8  
S&wMrQ  
file://partition W aRw05r  
l=i-1; 03X1d-  
r=j; i>`%TW:g  
do{ X 'Xx"M  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); (=AWOU+  
SortUtil.swap(data,l,r); W:2( .?  
} kiaw4_  
while(l SortUtil.swap(data,l,r); Ty?cC**  
SortUtil.swap(data,l,j); q6luUx,@m  
*Hn8)x}E  
if((l-i)>THRESHOLD){ kS);xA8s]  
stack[++top]=i; j_?FmX _  
stack[++top]=l-1; $ bR~+C  
} h7Kzq{$  
if((j-l)>THRESHOLD){ P/eeC"  
stack[++top]=l+1; j3V -LnA  
stack[++top]=j; 194)QeoFw  
} ydA8wL  
TF\C@4Z  
} S9y}  
file://new InsertSort().sort(data); v@L;x [Q  
insertSort(data); U?Zq6_M&  
} 6<QQ@5_  
/** @Cyvf5|bL  
* @param data 4xje$/_d  
*/ WSB 0~+  
private void insertSort(int[] data) { sY&IquK^  
int temp; B~ GbF*j  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); .*Y  
} *i%.;Z"  
} =8. ,43+  
} X&`t{Id?6  
E{`fF8]K  
} 45c$nuZ  
*] ) `z8Ox  
归并排序: ]h+j)J}[A  
R 'zWYQ  
package org.rut.util.algorithm.support; FcU SE  
uw_Y\F-$  
import org.rut.util.algorithm.SortUtil; R&k<AZ  
8OU\V5i[,q  
/** 7`'Tbp  
* @author treeroot "<1{9  
* @since 2006-2-2 SY\ gXO8k  
* @version 1.0 .M%}X7  
*/ Ve; n}mJ?  
public class MergeSort implements SortUtil.Sort{ ?k{?GtSs  
q>+k@>bk @  
/* (non-Javadoc) @q7I4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S4z;7z(8+  
*/ ?N9uu4  
public void sort(int[] data) { YU'E@t5  
int[] temp=new int[data.length]; sUQ@7sTj  
mergeSort(data,temp,0,data.length-1); ?0SJfh  
} hHnYtq  
}19\.z&J  
private void mergeSort(int[] data,int[] temp,int l,int r){ \_f(M|  
int mid=(l+r)/2; n{mfn *r.  
if(l==r) return ; +ye3HGD  
mergeSort(data,temp,l,mid); m;QMQeGz  
mergeSort(data,temp,mid+1,r); w<(pl%  
for(int i=l;i<=r;i++){ @*( (1(q  
temp=data; Q p3_f8  
} q@8*Xa>  
int i1=l; e(t\g^X  
int i2=mid+1; `X&gE,Ii  
for(int cur=l;cur<=r;cur++){ /a4{?? #e  
if(i1==mid+1) XW] tnrs  
data[cur]=temp[i2++]; 8{sGNCvU  
else if(i2>r) -uf|w?  
data[cur]=temp[i1++]; [7Oe3=  
else if(temp[i1] data[cur]=temp[i1++]; UP,c|  
else %7+qnH*;r  
data[cur]=temp[i2++]; }o`76rDN  
} HG^'I+Yn  
} vXje^>_6  
`b$.%S8uj=  
} !+v$)3u9  
2BwO!Y[  
改进后的归并排序: SwMc pNo  
|CRn c:  
package org.rut.util.algorithm.support; *$g-:ILRuZ  
uVrd i?3  
import org.rut.util.algorithm.SortUtil; C~/a-  
aPL+=58r  
/** $=4QO  
* @author treeroot W'M*nR|xo  
* @since 2006-2-2 Ysv" 6b}  
* @version 1.0 T6=u P)!K  
*/ a&? :P1$  
public class ImprovedMergeSort implements SortUtil.Sort { .$vK&k  
7qS)c}Q\  
private static final int THRESHOLD = 10; Y}wyw8g/  
G4"F+%.  
/* 5r ^(P  
* (non-Javadoc) Cw&KVw*  
* H qx-;F~0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xJ.M;SF4  
*/ utV_W&  
public void sort(int[] data) { IH+|}z4N?>  
int[] temp=new int[data.length]; UkFC~17P  
mergeSort(data,temp,0,data.length-1); {)sdiE  
} tKXIk9e  
X"%gQ.1|{j  
private void mergeSort(int[] data, int[] temp, int l, int r) { )9]PMA?u  
int i, j, k; 1$h,m63)  
int mid = (l + r) / 2; vnuN6M{  
if (l == r) 5v*\Zr5ha  
return; nX8v+:&}  
if ((mid - l) >= THRESHOLD) c-sfg>0^  
mergeSort(data, temp, l, mid); 5Gm_\kd  
else c7H^$_^=  
insertSort(data, l, mid - l + 1); } 0y"F  
if ((r - mid) > THRESHOLD) |`FY1NN   
mergeSort(data, temp, mid + 1, r); KMax$  
else t%8BK>AHvw  
insertSort(data, mid + 1, r - mid); G 01ON0  
S,8e lKH4  
for (i = l; i <= mid; i++) { p5*EA x  
temp = data; =7UsVn#o  
} J#83 0r(-  
for (j = 1; j <= r - mid; j++) { 1< ?4\?j  
temp[r - j + 1] = data[j + mid]; 3Jn ;}  
} 8 L Cb+^  
int a = temp[l]; #GFr`o0$^  
int b = temp[r]; n `Ac 3A  
for (i = l, j = r, k = l; k <= r; k++) { P.DK0VgY  
if (a < b) { uPvEwq* C  
data[k] = temp[i++]; /yZcDK4  
a = temp; 7zj{wp!  
} else { 'Pbr v  
data[k] = temp[j--]; eyxW 0}[  
b = temp[j]; BTxrp  
} 19#\+LWA  
} -Lg Ei3m  
} s>c=c-SP.  
B#R|*g:x  
/** |uJ%5y#  
* @param data ;9#KeA _  
* @param l '5tCz9}Y  
* @param i vih9 KBT  
*/ Dt1jW  
private void insertSort(int[] data, int start, int len) {  L"aeG  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8 FhdN  
} !5N.B|N t  
} s#GLJl\E_P  
} 'N(R_q6MW  
} (h `V+  
;FEqe 49  
堆排序: +cRn%ioVi  
!'O@2{?B  
package org.rut.util.algorithm.support; qxj(p o  
"Y.y:Vv;  
import org.rut.util.algorithm.SortUtil; )M^ gT}M  
k;W XB|k  
/** |l!aB(NW  
* @author treeroot P2nu;I_ &  
* @since 2006-2-2 -n;}n:w L  
* @version 1.0  AOx[  
*/ yh=N@Z*zP  
public class HeapSort implements SortUtil.Sort{ cc3 4e  
@%SQFu@FJ  
/* (non-Javadoc) 6H|S;K+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wKHBAW[i]  
*/ `$NP> %J-  
public void sort(int[] data) { `y0FY&y=  
MaxHeap h=new MaxHeap(); #LCb  
h.init(data); hv+zGID7  
for(int i=0;i h.remove(); nRY5xRvK  
System.arraycopy(h.queue,1,data,0,data.length); MO]&bHH7;  
} DTs;{c  
[S<";l8  
private static class MaxHeap{ D`AsRd  
GKCroyor  
void init(int[] data){ %>s |j'{  
this.queue=new int[data.length+1]; {XHh8_ ^&  
for(int i=0;i queue[++size]=data; ^C%<l( b  
fixUp(size); B-ESFATc  
} J8~haim  
} ~{gqsuCCL  
/7LR;>Bj  
private int size=0; J^/p(  
 z$Qbj  
private int[] queue; F5#YOck&,  
"h ^Z  
public int get() { F&Hrk|a  
return queue[1]; RT5T1K08I  
} 3N:D6w-R  
h.fq,em+H  
public void remove() { R GX=)  
SortUtil.swap(queue,1,size--); \C1nZk?3  
fixDown(1); $7uA%|\  
} %K QQ,{ b  
file://fixdown [8*)8jP3  
private void fixDown(int k) { R FH0  
int j; V1JIht>Opo  
while ((j = k << 1) <= size) { ]:\dPw`A  
if (j < size %26amp;%26amp; queue[j] j++; uwBi W  
if (queue[k]>queue[j]) file://不用交换 a'z7(8$$  
break; ]+$?u&0?w  
SortUtil.swap(queue,j,k); Y4(  
k = j; ,?XCyHSgWW  
}  7[wieYj{  
} m#F`] {  
private void fixUp(int k) { k$7Jj-+~  
while (k > 1) { O| hpXkV  
int j = k >> 1; A+)`ZTuO  
if (queue[j]>queue[k]) uM'Jp?  
break; qyNyBr?  
SortUtil.swap(queue,j,k); as_PoCoss  
k = j; +2j AC r  
} }iuw5dik+  
} kSh( u  
b%5f&N  
} = 9]~ yt  
#C3.Jef  
} JO< wU  
xZv#Es%#  
SortUtil: n.G!43@*N  
}Z,x~G  
package org.rut.util.algorithm; # Vha7  
W{gb:^;zb  
import org.rut.util.algorithm.support.BubbleSort; _f:W?$\ho  
import org.rut.util.algorithm.support.HeapSort; >oe]$r  
import org.rut.util.algorithm.support.ImprovedMergeSort; !I Qck8Y  
import org.rut.util.algorithm.support.ImprovedQuickSort;  ][h}  
import org.rut.util.algorithm.support.InsertSort; e@OX_t_  
import org.rut.util.algorithm.support.MergeSort; w*JGUk  
import org.rut.util.algorithm.support.QuickSort; d;}nh2*  
import org.rut.util.algorithm.support.SelectionSort; NTI+  
import org.rut.util.algorithm.support.ShellSort; N' `A?&2ru  
>&5DsV.B  
/** 1PV'?tXp(  
* @author treeroot <yFu*(Q  
* @since 2006-2-2  'CkIz"Wd  
* @version 1.0 .xWC{}7[  
*/ ';=O 0)u  
public class SortUtil { ?m? ::RH  
public final static int INSERT = 1; ={wcfhUl+  
public final static int BUBBLE = 2; "~C,bk  
public final static int SELECTION = 3; V /V9B2.$  
public final static int SHELL = 4;  O+Y6N  
public final static int QUICK = 5; o$lM$E:  
public final static int IMPROVED_QUICK = 6; &@Be2!%'9K  
public final static int MERGE = 7; 8C9-_Ng`  
public final static int IMPROVED_MERGE = 8; "mvt>X  
public final static int HEAP = 9; D\NKC@(M  
Hn+~5@.  
public static void sort(int[] data) { 8&`LYdzt  
sort(data, IMPROVED_QUICK); zsyIV!(  
} X LOh7(  
private static String[] name={ Q:k}Jl  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap"  DwE[D]7o  
}; iVq'r4S  
.MoU1n{Yc  
private static Sort[] impl=new Sort[]{ R3&Iu=g  
new InsertSort(), D (?DW}Rqs  
new BubbleSort(), T&u5ki4NE  
new SelectionSort(), V7fq4O^:  
new ShellSort(), 8(&[Rs?K  
new QuickSort(), 70tH:Z)"  
new ImprovedQuickSort(), G.a bql  
new MergeSort(), My[pr_xg  
new ImprovedMergeSort(), ++Ts  
new HeapSort() ZyPVy  
}; E GU 0)<  
=BAW[%1b  
public static String toString(int algorithm){ Tc`=f'pP)4  
return name[algorithm-1]; jc[Y}gd,  
} k(7&N0V%zz  
'RYIW/a  
public static void sort(int[] data, int algorithm) { {~"/Y@&]R  
impl[algorithm-1].sort(data); n QZwC  
} }1i`6`y1  
A:N|\Mv2b  
public static interface Sort { *>'V1b4}  
public void sort(int[] data); <~'"<HwtK  
} as4;:  
q{I%Q)t)gU  
public static void swap(int[] data, int i, int j) { {e9@-  
int temp = data; +tIF h'  
data = data[j]; 0c'<3@39k|  
data[j] = temp; a /l)qB#  
} z] P SpUd  
} a85$K$b>  
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