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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。 0v"h /  
插入排序: ws_/F  
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package org.rut.util.algorithm.support; C7hJE -  
>EJ`Z7E6  
import org.rut.util.algorithm.SortUtil; "QV?C  
/** ZD`9Ez)5  
* @author treeroot MODi:jsl  
* @since 2006-2-2 DO5H(a  
* @version 1.0 dyyGt }}5f  
*/ k~|5TO  
public class InsertSort implements SortUtil.Sort{ c]OK)i-{l  
&% infPI'  
/* (non-Javadoc) #[<XN s!"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :wcv,YoSG  
*/ /,`40^U}  
public void sort(int[] data) { C5ia9LpRX  
int temp; :Qekv(z  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); !^h{7NmP[  
} :5 zXW;s  
} 6M)4v{F  
} t:N3k ;k  
[<!4 a  
} %1jlXa  
Bq# l8u  
冒泡排序: ^5,B6  
xBevf&tP  
package org.rut.util.algorithm.support; 0;6 ^fiSY;  
Gd:fh5u':  
import org.rut.util.algorithm.SortUtil; >ow5aOlQ&  
K3xs=q]:@  
/** e ab_"W   
* @author treeroot 2(%C  
* @since 2006-2-2 Ug=)_~  
* @version 1.0 6+Bccqn|  
*/ \5ZDP3I  
public class BubbleSort implements SortUtil.Sort{ HZ8k%X}1  
/^jV-Z`  
/* (non-Javadoc) rT}k[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @x4IxGlUs  
*/ D?Y j5eOa  
public void sort(int[] data) { A]WR-0Z7  
int temp; ;H%T5$:trP  
for(int i=0;i for(int j=data.length-1;j>i;j--){ z~R:!O-  
if(data[j] SortUtil.swap(data,j,j-1); :Dn{  
} Pd^v-}[  
} $SAk|  
} B?|url6h  
} ~ 6`Ha@  
THXG~3J<  
} @4ECz>Q  
!JOM+P:  
选择排序: x[w!buV0\  
k NnI$(H"H  
package org.rut.util.algorithm.support; sm1(I7y  
^@a|s Sb  
import org.rut.util.algorithm.SortUtil; 2uajK ..b  
*H''.6  
/** PL6f**{-  
* @author treeroot ~ v21b?   
* @since 2006-2-2 bFt$u]Yvo  
* @version 1.0 y"o@?bny  
*/ Hb :@]!r>  
public class SelectionSort implements SortUtil.Sort { U`HSq=J  
J<'7z%2w  
/* r:QLO~l/  
* (non-Javadoc) Z8yt8O  
* q=+AN</  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4a6WQVS  
*/ 'A}@XGE:p  
public void sort(int[] data) { FLE2]cL-  
int temp; c&rS7%  
for (int i = 0; i < data.length; i++) { _,C>+dv)  
int lowIndex = i; S7fX1y[  
for (int j = data.length - 1; j > i; j--) { )kl(}.9X  
if (data[j] < data[lowIndex]) { mO1r~-~AJ  
lowIndex = j; JJ=%\j  
} aVXk8zuL  
} HAtf/E]  
SortUtil.swap(data,i,lowIndex); BA 9c-Ay  
} -T0@b8  
} `YinhO:Z  
^ rB7&96C,  
} D')m8:>  
Oz: J8l%  
Shell排序: z|5Sy.H>  
C72!::o  
package org.rut.util.algorithm.support; lNQ8$b  
jwe^(U  
import org.rut.util.algorithm.SortUtil; eInx\/  
`]q>A']Dl  
/** t;?TXAA  
* @author treeroot r-,P  
* @since 2006-2-2 Y4 <  
* @version 1.0 !jIpgs5  
*/ S=R}#  
public class ShellSort implements SortUtil.Sort{ qyx  '  
E6f{z9y6  
/* (non-Javadoc) u*aFWl]=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #go!"H L  
*/ l\NVnXv:>  
public void sort(int[] data) { P0 va=H  
for(int i=data.length/2;i>2;i/=2){ +F9)+wT~;q  
for(int j=0;j insertSort(data,j,i); V:wx@9m)  
} 0bt"U=x4  
} 1$]hyC/f  
insertSort(data,0,1); Xaca=tsO  
} JQp::,g  
ju AUeGT  
/** _W3>Km-A=/  
* @param data -ST[!W V  
* @param j Y5Ub[o  
* @param i c~0hu*&  
*/ r/32pY  
private void insertSort(int[] data, int start, int inc) { #RG/B2  
int temp; )0Lno|l  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ^Iz(V2  
} E`DsRR <  
} ZMI!Sl  
} 9AxeA2/X  
'|9fDzW"]  
} 7E-1 #4  
S\F;b{S1  
快速排序: )G a%Eg9  
_Kw<4 $0<p  
package org.rut.util.algorithm.support; B}(+\Q$I  
has \W\(  
import org.rut.util.algorithm.SortUtil; k6p Xc<]8  
4Hk eXS.  
/** TCC([  
* @author treeroot $Eo)i  
* @since 2006-2-2 !D_Qat  
* @version 1.0 C|@6rr9TA  
*/ "8'aZ.P  
public class QuickSort implements SortUtil.Sort{ %s^2m"ca}=  
~; emUU  
/* (non-Javadoc) \G!TC{6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "'@iDq%y  
*/ cr&sI=i  
public void sort(int[] data) { SXA`o<Ma  
quickSort(data,0,data.length-1); AaVj^iy/X  
} $Ka-ZPy<#  
private void quickSort(int[] data,int i,int j){ 7AE)P[  
int pivotIndex=(i+j)/2; " wB~*,Ny  
file://swap I1IuvH6  
SortUtil.swap(data,pivotIndex,j); jmDQKqEc|l  
aWG7k#nE  
int k=partition(data,i-1,j,data[j]); Ed(6%kd  
SortUtil.swap(data,k,j); w=UFj  
if((k-i)>1) quickSort(data,i,k-1); s Y^#I  
if((j-k)>1) quickSort(data,k+1,j); g.& n X/  
?D6?W6@  
} c%5G3j  
/**  &Ow[  
* @param data z/B[quSio  
* @param i aQMUC6cPM@  
* @param j Y6>@zznk  
* @return J`&*r;""V  
*/ 3XCePA5z  
private int partition(int[] data, int l, int r,int pivot) { (zVT{!z  
do{ v*Fr #I0U  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); * mzJ)4A  
SortUtil.swap(data,l,r); v(=?ge YLo  
} KqM!7  
while(l SortUtil.swap(data,l,r); WB: NV=&^  
return l; '_f]qNy  
} 8f""@TTp  
JDQ7  
} ot"3 3I  
Y5 BWg  
改进后的快速排序: gJkk0wok C  
W'>"E/Tx#O  
package org.rut.util.algorithm.support; 'Mfn:n+  
({GN.pC(  
import org.rut.util.algorithm.SortUtil; l"I G;qO.  
XIgGE)n  
/** MDHTZ9 4\Q  
* @author treeroot oj|\NlR  
* @since 2006-2-2 0gR!W3dh  
* @version 1.0 zdL"PF  
*/ YA";&|V  
public class ImprovedQuickSort implements SortUtil.Sort { X ^ ?M4  
#- l1(m  
private static int MAX_STACK_SIZE=4096; (1t b  
private static int THRESHOLD=10; D7 D:?VoR  
/* (non-Javadoc) [>rX/a%c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |#y+iXTJ   
*/ z'FpP  
public void sort(int[] data) { E{Tvjh+  
int[] stack=new int[MAX_STACK_SIZE]; _{eH" ,(  
>uu ]K  
int top=-1; zA~aiX  
int pivot; %\ifnIQ  
int pivotIndex,l,r; !| G 8b'  
p41TSALq  
stack[++top]=0; s.9)? < [  
stack[++top]=data.length-1; sQ4~oZZ  
B 66-l!xa  
while(top>0){ C78V/{  
int j=stack[top--]; ]TE,N$X  
int i=stack[top--]; D2060ze  
]*M VVzF  
pivotIndex=(i+j)/2; gcaXN6C  
pivot=data[pivotIndex]; #QWG5  
k*?Axk#  
SortUtil.swap(data,pivotIndex,j); ?`,Rkg0fe  
Za*QX|  
file://partition P5qY|_  
l=i-1; q|;Sn  
r=j; #o(c=  
do{ */T.]^  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 4v=NmO }  
SortUtil.swap(data,l,r); YH:murJMZ  
} q1|! oQ  
while(l SortUtil.swap(data,l,r); e=8z,.Xk  
SortUtil.swap(data,l,j); xu]>TC1  
B{In "R8  
if((l-i)>THRESHOLD){ J Uf{;nt  
stack[++top]=i; +&U{>?.u  
stack[++top]=l-1; e5 "?ol0  
} #dd-rooQuD  
if((j-l)>THRESHOLD){ AUan^Om  
stack[++top]=l+1; )\!-n]+A  
stack[++top]=j; {<p-/|Z52  
} wva| TZ  
|%i|P)]  
} |X'Pa9u  
file://new InsertSort().sort(data); >h[ {_+  
insertSort(data); 0c pI2  
} jRCf!RO  
/** |x Nd^  
* @param data ';CL;A;  
*/ '&|]tu:q  
private void insertSort(int[] data) { N9[2k.oBH  
int temp; "I7 Sed7  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); OLl?1  
} Dd=iYM m7  
} ITq$8  
} _6"YWR  
SU {U+  
} #nzVgV]  
=LUDg7P  
归并排序: TqZ&X| G  
 w`77E=  
package org.rut.util.algorithm.support; G T3wJQ5N  
w<4,;FFlZ/  
import org.rut.util.algorithm.SortUtil; iJr 1w&GL$  
=` %iv|>r0  
/** ,o_Ur.UJ  
* @author treeroot #Is/j =  
* @since 2006-2-2 bM9:h  
* @version 1.0 ?puZqVu5  
*/ WN_i-A1G/h  
public class MergeSort implements SortUtil.Sort{ 2f=7`1RCD  
Y(` # J[  
/* (non-Javadoc) V&j |St[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /=|5YxY  
*/ %)|_&Rh  
public void sort(int[] data) { qM|-2Zl!+  
int[] temp=new int[data.length]; cSkJlhwNn  
mergeSort(data,temp,0,data.length-1); <]/z45?  
} ,J (+%#$UT  
cl4Vi%   
private void mergeSort(int[] data,int[] temp,int l,int r){ VgoN=S  
int mid=(l+r)/2; TsX(=N_  
if(l==r) return ; o C5}[cYD`  
mergeSort(data,temp,l,mid); U'Xw'?Uj  
mergeSort(data,temp,mid+1,r); mp\`9j+{  
for(int i=l;i<=r;i++){ hlgBx~S[  
temp=data; |PI]v`[  
} z ]d^%>Ef  
int i1=l; }`SXUM_sD`  
int i2=mid+1; .\W6XRw  
for(int cur=l;cur<=r;cur++){ `!K!+`Z9  
if(i1==mid+1) #4iiY6  
data[cur]=temp[i2++]; #]BpTpRAe<  
else if(i2>r) |.s#m^"  
data[cur]=temp[i1++]; S!u`V3-s  
else if(temp[i1] data[cur]=temp[i1++]; +Yuy%VT  
else H"_]Hq  
data[cur]=temp[i2++]; <K#]1xCA  
} 5:=ECtKi  
} CQLh;W`Dc  
1o;*`  
}  F%}0q&  
icX$<lD  
改进后的归并排序: ,w+}Evp])  
N1O& fMz  
package org.rut.util.algorithm.support; !*U#,qY  
LB)sk$)  
import org.rut.util.algorithm.SortUtil; pO~VI$7  
^aW?0qsH  
/** _>/T<Db  
* @author treeroot .q>4?+  
* @since 2006-2-2 m^8KHa  
* @version 1.0 wR"4slY_%  
*/ 4s Vr]p`  
public class ImprovedMergeSort implements SortUtil.Sort { Z1(-FT6O  
T@GR Tg  
private static final int THRESHOLD = 10; ()E:gq Q  
+hz^( I7  
/* B Bub'  
* (non-Javadoc) I3 %P_oW'  
* owA0I'|V-A  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {GaQV-t  
*/ $rZ:$d.C  
public void sort(int[] data) { 4zF|}aiQ  
int[] temp=new int[data.length]; Wgh4DhAW  
mergeSort(data,temp,0,data.length-1); #&@qmps(T  
} :\0q\2e[<  
G]Jchg <  
private void mergeSort(int[] data, int[] temp, int l, int r) { 8\M%\]_  
int i, j, k; $jd>=TU|  
int mid = (l + r) / 2; ^GXy:S$  
if (l == r) .>(?c92  
return; 4LCgQS6  
if ((mid - l) >= THRESHOLD) A/ eZ!"Y  
mergeSort(data, temp, l, mid); HzO6hb{jJO  
else YzcuS/~x  
insertSort(data, l, mid - l + 1); AX|-Gv  
if ((r - mid) > THRESHOLD) R|Oy/RGY$  
mergeSort(data, temp, mid + 1, r); LE15y>  
else 2C@hjw(  
insertSort(data, mid + 1, r - mid); 4{'0-7}  
A2` QlhZ  
for (i = l; i <= mid; i++) { XsldbN^ 6  
temp = data; a<.7q1F  
} x 5u.D^  
for (j = 1; j <= r - mid; j++) { oCLs"L-r{  
temp[r - j + 1] = data[j + mid]; @-z#vJ5Qe{  
} )P^5L<q>|  
int a = temp[l]; !;SpQ28  
int b = temp[r]; vT<q zN  
for (i = l, j = r, k = l; k <= r; k++) { )shzJ9G  
if (a < b) { /H)K_H#|;  
data[k] = temp[i++]; ,w.`(?I/  
a = temp; LE_1H >  
} else { $*| :A  
data[k] = temp[j--]; (D'Z4Y  
b = temp[j]; &gkGH<oaX  
} *yuw8  
} K_V44f1f  
} @jW_ r j:<  
i<g|+}I  
/** O&# bC  
* @param data <v?9:}  
* @param l )x.}B4z  
* @param i k_9tz}Z  
*/ p[(VhbN  
private void insertSort(int[] data, int start, int len) { mMqT-jT  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *G^n<p$"  
} %Fc, $ =  
} j+3~  
} ]JX0:'x^  
} s,TKC67.%+  
5/Ng!bW  
堆排序: |Xblz1>DF  
IMY?L  
package org.rut.util.algorithm.support; d7A08l{  
pRtxyL"y  
import org.rut.util.algorithm.SortUtil; A>6 b 6  
%3e}YQe)  
/** 0 &U,WA  
* @author treeroot ,P^pDrc  
* @since 2006-2-2 tb7Wr1$<  
* @version 1.0 b 2n.v.$G  
*/ (NUk{MTX  
public class HeapSort implements SortUtil.Sort{ c'_-jdi`>_  
/"?y @;Y~  
/* (non-Javadoc) e-4XNL[F  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?@9kVB*|  
*/ :X[(ymWNE  
public void sort(int[] data) { *LeFI%  
MaxHeap h=new MaxHeap(); UYH;15s  
h.init(data); v*5n$UFV  
for(int i=0;i h.remove(); E%\iNU!  
System.arraycopy(h.queue,1,data,0,data.length); KO(+%>^R  
} vy#n7hdCc  
P}o:WI4.cB  
private static class MaxHeap{ SU"-%}~O#,  
AiSO|!<.N  
void init(int[] data){ lhTjG,U=  
this.queue=new int[data.length+1]; )W'l^R4W  
for(int i=0;i queue[++size]=data; F\+wM*:U  
fixUp(size); |,bsMJh0  
} _`WbR&d2Id  
} * B,D#;6  
`G\uTCpk  
private int size=0; 9|dgmEd  
PYqx&om  
private int[] queue; 4VPL -":6  
@`aR*B  
public int get() { I#Ay)+D  
return queue[1]; B:5( sK  
} w!)B\l^+c  
6\)61o_1|  
public void remove() { zF%CFqQ  
SortUtil.swap(queue,1,size--); x^}kG[s  
fixDown(1); i]*W t8~!  
}  (7x5  
file://fixdown >z6 (fM`i  
private void fixDown(int k) { `h12  
int j; {zBf*x  
while ((j = k << 1) <= size) { r00waw>C\  
if (j < size %26amp;%26amp; queue[j] j++; p~I+ZYWF'  
if (queue[k]>queue[j]) file://不用交换 dg 0`0k  
break; 9@Yk8  
SortUtil.swap(queue,j,k); "<0BCJJ  
k = j; >/1N#S#9  
} Kxz<f>`b/  
} "K`B'/08^  
private void fixUp(int k) { `@ULG>   
while (k > 1) { O^hWG ~o  
int j = k >> 1; 9_[TYzpB!  
if (queue[j]>queue[k]) Wm4@+ }  
break; WV!qG6\W  
SortUtil.swap(queue,j,k); = ^:TW%O  
k = j; U?JZ23>bbw  
} 33|>u+  
} ]uX'[Z}t  
q=ZLSBZ  
} %TxFdF{A  
2hAu~#X  
} =v=a:e  
t>f<4~%MJ  
SortUtil: I\PhgFt@O  
M4pE wD  
package org.rut.util.algorithm; rOw""mE  
!HL7a]PB  
import org.rut.util.algorithm.support.BubbleSort; szMh}q"u  
import org.rut.util.algorithm.support.HeapSort; vL@N21u  
import org.rut.util.algorithm.support.ImprovedMergeSort; ?1i>b->  
import org.rut.util.algorithm.support.ImprovedQuickSort; !Sfy'v.  
import org.rut.util.algorithm.support.InsertSort; R!;tF|]  
import org.rut.util.algorithm.support.MergeSort; Z; Xg5  
import org.rut.util.algorithm.support.QuickSort; )Y RVy  
import org.rut.util.algorithm.support.SelectionSort; x;S v&  
import org.rut.util.algorithm.support.ShellSort; bgGd  
CE-ySIa  
/** br+{23&1R#  
* @author treeroot 'YQ"Lf  
* @since 2006-2-2 {NXc<0a(  
* @version 1.0 6ND,4'6  
*/ Zalgg/.  
public class SortUtil { Kvv&# eO\  
public final static int INSERT = 1; LGKkT?fcSC  
public final static int BUBBLE = 2; FOgF'!K  
public final static int SELECTION = 3; /E$"\md  
public final static int SHELL = 4; jFpXTy[>  
public final static int QUICK = 5; 6UR.,*f=  
public final static int IMPROVED_QUICK = 6; {o< 4 ^  
public final static int MERGE = 7; aM5zYj`pW  
public final static int IMPROVED_MERGE = 8; ~PP*k QZlJ  
public final static int HEAP = 9; T{d7,.:  
bwUsE U 0  
public static void sort(int[] data) { xi8RE@gm  
sort(data, IMPROVED_QUICK); qlD+[`=b  
} _H>ABo  
private static String[] name={ ym:^Y-^iV  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G*uy@s:  
}; T!eeMsI  
PmyS6a@  
private static Sort[] impl=new Sort[]{ >3s9vdUp4h  
new InsertSort(), x0@J~ _0  
new BubbleSort(), x:b 0G  
new SelectionSort(), n^'ip{  
new ShellSort(), .5|AX6p+^  
new QuickSort(), qPuxYU  
new ImprovedQuickSort(), )VQ:L:1t(  
new MergeSort(), Ox.&tW%@  
new ImprovedMergeSort(), [[P?T^KT  
new HeapSort() yZ)GP!cM4c  
}; `YAqR?Xj_<  
~{iBm"4  
public static String toString(int algorithm){ EMzJJe{Cv  
return name[algorithm-1]; p8hF`D~  
} %YG ~ql  
GJai!$v  
public static void sort(int[] data, int algorithm) { JVf8KHDj  
impl[algorithm-1].sort(data); db`xlvrCY  
} o1YX^-<[F  
zM"OateA  
public static interface Sort { R8P7JY[h  
public void sort(int[] data); &G7JGar  
} ~V[pu  
%sP C3L  
public static void swap(int[] data, int i, int j) { zg+78  
int temp = data; N[d*_KN.!  
data = data[j]; EWNh:<F?  
data[j] = temp; trnjOm  
} KhAj`vOzK  
} |8PUmax  
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