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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&2mFg  
插入排序: "]1|%j  
EY.Z.gMZI(  
package org.rut.util.algorithm.support; @ u2 P&|:{  
lRA!  
import org.rut.util.algorithm.SortUtil; 83gp'W{|  
/** 2S_7!|j  
* @author treeroot VaFv%%w  
* @since 2006-2-2 H=>;M j  
* @version 1.0 Xx=c'j<  
*/ Kd^,NAg  
public class InsertSort implements SortUtil.Sort{ G\o *j |  
ZklZU,\!|v  
/* (non-Javadoc) %0^taA  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ch:0qgJ  
*/ v.e~m2u_F  
public void sort(int[] data) { Z3nmC-NE  
int temp; x[eho,6)  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 3h>5 6{P  
} :~dI2e\:  
} + |d[q?  
} p#fV|2'  
K6; sxF  
} ; Uf]-uS  
>KnXj7  
冒泡排序: ]tDuCZA  
<+${gu?^  
package org.rut.util.algorithm.support; a2`|6M;  
;kiL`K  
import org.rut.util.algorithm.SortUtil; 5o R/Q|^  
hS7o=G[  
/** -PH!U Hg  
* @author treeroot 2ID]it\5  
* @since 2006-2-2 #MI4 `FZ  
* @version 1.0 t"L-9kCM  
*/ e8ZMB$byP  
public class BubbleSort implements SortUtil.Sort{ *u`[2xmuYf  
o+.LG($+U  
/* (non-Javadoc) v6_fF5N/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9)]asY  
*/ xr'gi(.o  
public void sort(int[] data) { j5qrM_Chg  
int temp; S2EeC&-AR  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ojQjx|Q}  
if(data[j] SortUtil.swap(data,j,j-1); v d}Y$X  
} \4pWHE/  
} SLMnEtyTS  
} Z4'8x h)-  
} xHY#"   
%Ut7%obpi  
} gls %<A{C  
'-5Q>d~&h  
选择排序: f-/zR%s{  
.q7|z3@,  
package org.rut.util.algorithm.support; %I6c}*W  
jV!9IK;HA.  
import org.rut.util.algorithm.SortUtil; %nkP?gn"a  
n%Gk {h5  
/** i*g>j <`  
* @author treeroot A ^wIsAxT  
* @since 2006-2-2 c$[cDf~  
* @version 1.0 ?#rejA:  
*/ mU3 @|a/@0  
public class SelectionSort implements SortUtil.Sort { ,8MUTXd@ V  
,Rh6( I  
/* \ZPmPu9^(  
* (non-Javadoc) \9}RAr#2]N  
* i[d@qp!H=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F 7~T=X)1  
*/ BLs kUrPF  
public void sort(int[] data) { 0qU Bt9rA  
int temp; 2En^su$  
for (int i = 0; i < data.length; i++) { 8KU5x#  
int lowIndex = i; ZdjmZx%%  
for (int j = data.length - 1; j > i; j--) { =u#xPI0:  
if (data[j] < data[lowIndex]) {  wN4N 2  
lowIndex = j; LmQS;/:  
} Sx", Zb  
} $8"G9r  
SortUtil.swap(data,i,lowIndex); >SR! *3$5  
} chr^>%Q_  
} *[^[!'kT&  
hLf<-NM  
} 7 P$>T  
G uLU7a  
Shell排序: `78:TU~5S  
hs5aIJ  
package org.rut.util.algorithm.support; HMymoh$Q  
N-O"y3W}  
import org.rut.util.algorithm.SortUtil; fxKhe[;  
Dy[_Ix/Y,  
/** Anu`F%OzB  
* @author treeroot 8qY\T0  
* @since 2006-2-2 -U"h3Ye^  
* @version 1.0 IyfhVk?  
*/ 1\'zq;I~  
public class ShellSort implements SortUtil.Sort{ !jeoB  
!C$bOhc  
/* (non-Javadoc) E 9LKVs}  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D[5Qd)PIL  
*/ DiLZ5^`]  
public void sort(int[] data) { [aF^D;o  
for(int i=data.length/2;i>2;i/=2){ .7|kxJq  
for(int j=0;j insertSort(data,j,i); #o]/&T=N=  
} x8]5> G8(r  
} l&f"qF?  
insertSort(data,0,1); 18xT2f  
} lS.&>{  
quPNwNy  
/** GYq.!d@O  
* @param data Qg\{d)X[N  
* @param j SQ_w~'(  
* @param i l6wN&JHTh  
*/ uGxh}'&  
private void insertSort(int[] data, int start, int inc) {  gh{Z=_  
int temp; */ ~_3  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Hmi]qK[F  
} NQx`u"=  
} n7r )wy  
} V#Hg+\{d  
d 1 8>0R  
} ph;ds+b  
b;X|[tB  
快速排序: ).BZPyV<  
~$O.KF:  
package org.rut.util.algorithm.support; l".LtUf-  
2!u4nxZ.  
import org.rut.util.algorithm.SortUtil; l*`2 EJ  
MY[QYBkn}  
/** ?IWLH-fkP  
* @author treeroot Sl?@c/Ng  
* @since 2006-2-2 YF]W<ZpY  
* @version 1.0 k_^| %xJ  
*/ 7vRFF@eq}  
public class QuickSort implements SortUtil.Sort{ $Z!$E,@c  
ve [*t`  
/* (non-Javadoc) GRt1]%l#$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <]jKpJ{3N  
*/ #@*;Y(9Ol  
public void sort(int[] data) {  9z9EK'g  
quickSort(data,0,data.length-1); rX-V0  
} Z+qTMm  
private void quickSort(int[] data,int i,int j){ QR+{Yp  
int pivotIndex=(i+j)/2; t=IpV l!  
file://swap S8 {Sb>  
SortUtil.swap(data,pivotIndex,j); Dp5hr8bT  
bP4<q?FKcN  
int k=partition(data,i-1,j,data[j]); 'k?%39  
SortUtil.swap(data,k,j); =Qa*-*  
if((k-i)>1) quickSort(data,i,k-1); %SHjJCS3  
if((j-k)>1) quickSort(data,k+1,j); yt+"\d  
)_vE"ryThA  
} 7 fE QD?C  
/** 23F<f+2S  
* @param data 01 vEt  
* @param i v7i5R !  
* @param j B-@ ]+W  
* @return /qYo*S_cG  
*/ ubpVrvu@  
private int partition(int[] data, int l, int r,int pivot) { w;RG*rv  
do{ \sUk71L` j  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); u;[*Z  
SortUtil.swap(data,l,r); 5L'bF2SI  
} mr`Lxy9e  
while(l SortUtil.swap(data,l,r); x2^Yvgc-  
return l; Guc~] B  
} 3( Y#*f|  
80p?qe  
} C1/<t)^  
y}'c)u  
改进后的快速排序: A 11w{`EM  
&s +DK `  
package org.rut.util.algorithm.support; !zd]6YL$  
{iyO96YI[^  
import org.rut.util.algorithm.SortUtil; W' DpI7  
C Rd1zDB  
/** BRTM]tRZ  
* @author treeroot y?t2@f]!XK  
* @since 2006-2-2 *$t<H-U-  
* @version 1.0 RY>BP[h  
*/ @+9x8*~S'  
public class ImprovedQuickSort implements SortUtil.Sort { yEaim~  
?f\;z<e|  
private static int MAX_STACK_SIZE=4096; Slk__eC  
private static int THRESHOLD=10;  KKfC^g  
/* (non-Javadoc) E5#Dn.!~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %[x oA)0!  
*/ `30og]F0YJ  
public void sort(int[] data) { V! sT2  
int[] stack=new int[MAX_STACK_SIZE]; K%XQdMv  
RjII(4Et  
int top=-1; ^[7ZBmS  
int pivot; ^x! N]  
int pivotIndex,l,r; jkPye{j  
muAI$IRR   
stack[++top]=0; 'w'P rM,:  
stack[++top]=data.length-1; AI$r^t1  
]6`]+&  
while(top>0){ w3,1ImrXp  
int j=stack[top--]; lw.4O^  
int i=stack[top--]; @_gCGI>Q  
x >u \  
pivotIndex=(i+j)/2; r[>=iim  
pivot=data[pivotIndex]; i|z=q  
m.F \Mn  
SortUtil.swap(data,pivotIndex,j); <.DFa/G   
kl0!*j  
file://partition ;3nR_6\  
l=i-1; l17sJ!I  
r=j; dSD7(s!  
do{ :'L^zGf  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); MH"{N "|  
SortUtil.swap(data,l,r); $\W|{u`  
}  #E[{  
while(l SortUtil.swap(data,l,r); FmRCTH  
SortUtil.swap(data,l,j); 8{m5P8w'  
X=:|v<E   
if((l-i)>THRESHOLD){ CXb-{|I}d  
stack[++top]=i; -,M*j|   
stack[++top]=l-1; xq?9w$  
} _I("k:E7  
if((j-l)>THRESHOLD){ ]BY^.!Y  
stack[++top]=l+1; H nKO  
stack[++top]=j; mfYY?]A*+  
} )1PZ#  
X3C"A|HE9  
} XHX\+&6  
file://new InsertSort().sort(data); .{cka]9WJz  
insertSort(data); u?OyvvpH  
} 20 j9~+  
/** o\_@4hXf  
* @param data IZ<d~ [y  
*/ >dnH  
private void insertSort(int[] data) { UDJ{ iZ  
int temp; Ueq*R(9>  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); w]4=uL6  
} g]'RwI  
} P/BWFN1  
} e<Hbm  
;.=ZwM]C  
} O!0YlIvWv  
3?Ml]=u  
归并排序: we6kV-L.  
n=HId:XT  
package org.rut.util.algorithm.support; `Qf$]Eoft  
"bO\Wt#Mf  
import org.rut.util.algorithm.SortUtil; sh $mOy  
Z9:erKT   
/** )2@_V %  
* @author treeroot %J*z!Fe8s  
* @since 2006-2-2 6} DGEHc1  
* @version 1.0 CM}1:o<<N  
*/ y*Egt`W  
public class MergeSort implements SortUtil.Sort{ o gcEv>0  
!"*!du28jo  
/* (non-Javadoc) 54TW8y `h  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k{*IR  
*/ 2v ^bd^]u:  
public void sort(int[] data) { EhEUkZE3 )  
int[] temp=new int[data.length]; &<!DNXQ  
mergeSort(data,temp,0,data.length-1); <,U=w[cH  
} hXsd12  
/~w!7n<7  
private void mergeSort(int[] data,int[] temp,int l,int r){ RUJkfi=$  
int mid=(l+r)/2; /Iwnl   
if(l==r) return ; >900I4]I  
mergeSort(data,temp,l,mid); Cu5fp.OS7  
mergeSort(data,temp,mid+1,r); 5r=xhOe`  
for(int i=l;i<=r;i++){ !.\EU*)1  
temp=data; C2WWS(zn  
} $T\W'W R>  
int i1=l; [@!.(Hp  
int i2=mid+1; D& Xh|}2A  
for(int cur=l;cur<=r;cur++){ q[6tvPfkX  
if(i1==mid+1) H%,jB<-.A  
data[cur]=temp[i2++]; w2-:!,X  
else if(i2>r) <ptgFR+  
data[cur]=temp[i1++]; m/,.3v  
else if(temp[i1] data[cur]=temp[i1++]; @ ;%+Ms  
else Eei"baw/  
data[cur]=temp[i2++]; sFqLxSo_I  
} cC{eu[ XW  
} Ls8@@b,t2  
)ZxDfRjL  
} Xb0$BAP  
nz72w_  
改进后的归并排序: hE|Z~5\Y,>  
p.{M sn  
package org.rut.util.algorithm.support; V3%"z  
3 ;M7^DM  
import org.rut.util.algorithm.SortUtil; <eU1E }BDQ  
\Tf$i(0q  
/** t' )47k\  
* @author treeroot i$~2pr  
* @since 2006-2-2 N=1zhI:VaQ  
* @version 1.0 AJk0jh\.j%  
*/ P5u Y1(  
public class ImprovedMergeSort implements SortUtil.Sort { dGxk ql  
)tH.P: 1~,  
private static final int THRESHOLD = 10; J~=bW\^I  
+_.k\CRms  
/* :}QBrd  
* (non-Javadoc) BCDmce`=l  
* _lWC)bv`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [E9V#J89  
*/ v'R{lXE  
public void sort(int[] data) { m5!~PG:_  
int[] temp=new int[data.length]; ^/nj2"  
mergeSort(data,temp,0,data.length-1); }ll&qb  
} W'aZw9  
RCXm< /  
private void mergeSort(int[] data, int[] temp, int l, int r) { l;*/F`>c  
int i, j, k; PI KQ}aq=  
int mid = (l + r) / 2; C,*3a`/2M^  
if (l == r) HGuU6@~hu  
return; )?5027^  
if ((mid - l) >= THRESHOLD) 20 <$f  
mergeSort(data, temp, l, mid); G`n|fuv  
else LAe>XF-5  
insertSort(data, l, mid - l + 1); N$\'X<{  
if ((r - mid) > THRESHOLD) Wo&WO e  
mergeSort(data, temp, mid + 1, r); =mVWfFL  
else 7_OC&hhL  
insertSort(data, mid + 1, r - mid); ^!Y]l  
[i[*xf-B  
for (i = l; i <= mid; i++) { #Tc]L<."  
temp = data; a`c#- je  
} 4LG[i}u.N  
for (j = 1; j <= r - mid; j++) { 26SXuFJ@  
temp[r - j + 1] = data[j + mid]; $w,?%i97  
} C`G+b{o  
int a = temp[l]; L]wWJL  
int b = temp[r]; W''%{A/'  
for (i = l, j = r, k = l; k <= r; k++) { ~ m/nV81  
if (a < b) { Xk9mJ]31LC  
data[k] = temp[i++]; A -C.Bi;/  
a = temp; ew13qpt)<L  
} else { `ChS$p"A  
data[k] = temp[j--]; mf~Joluc J  
b = temp[j]; a ~s:f5S>  
} j6!C/UgQ  
} xwuGJ   
} [ B{F(~O  
v|!u]!JM  
/** ;rggO0Y  
* @param data /{)}y  
* @param l 0bG[pp$[  
* @param i  Dno]N  
*/ NCrNlH IF  
private void insertSort(int[] data, int start, int len) { Cz1Q@<)  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); / @v V^!#1  
} 4>x$I9^Y!  
} m:6^yfS  
}  Mi>!  
} ZmLA4<  
pZE}<EX  
堆排序: QN4{xf:}S  
BlLK6"gJT  
package org.rut.util.algorithm.support; .uh>S!X, ]  
]%%I=r  
import org.rut.util.algorithm.SortUtil; Z\YCjs%  
=3h?!$#?  
/** DOaTp f  
* @author treeroot C VXz>oM  
* @since 2006-2-2 d4ga6N3'  
* @version 1.0 9"W3t]  
*/ }3825  
public class HeapSort implements SortUtil.Sort{ "[wkjNf%  
JXx[e  
/* (non-Javadoc) Mb!b0  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w3 n6md  
*/ W u C2 LM  
public void sort(int[] data) { OO?;??  
MaxHeap h=new MaxHeap(); Ci-CY/]s  
h.init(data); A#o ~nC<  
for(int i=0;i h.remove(); <E2n M,  
System.arraycopy(h.queue,1,data,0,data.length); )r0XQa]@$  
} VQ R E ]  
 YW14X  
private static class MaxHeap{ x?"+Or.h  
&@v&5EXOw  
void init(int[] data){ R|@?6<  
this.queue=new int[data.length+1]; yG' 5:  
for(int i=0;i queue[++size]=data; < `Xt?K  
fixUp(size); ^P!(* k#T  
}  JT,[;  
} ;s$,}O.  
9ZD>_a  
private int size=0; +^6a$ N  
MJ\^i4  
private int[] queue; ts:YJAu+F  
Jkx_5kk/\  
public int get() { r"_U-w  
return queue[1]; g[c_rty  
} |j2$G~B6  
7DZZdH$Fm  
public void remove() { }R9>1u}6  
SortUtil.swap(queue,1,size--); e0"80"D  
fixDown(1); ]lqe,>  
} (v,g=BS,  
file://fixdown !MyCxM6  
private void fixDown(int k) { 9cIKi#Bl  
int j; p!o?2Lbiw  
while ((j = k << 1) <= size) { (ri eg F  
if (j < size %26amp;%26amp; queue[j] j++; qNuBK6E#4  
if (queue[k]>queue[j]) file://不用交换 I.6 qA *  
break; , 3&D A  
SortUtil.swap(queue,j,k); Q)/oU\  
k = j; EXbaijHQG  
} : GdLr  
} 9Ro7xSeD  
private void fixUp(int k) { 9 df GV!Z  
while (k > 1) { Q,LDn%+;B*  
int j = k >> 1; $=9g,39  
if (queue[j]>queue[k]) \S_o{0ZY}  
break; :!QT ,  
SortUtil.swap(queue,j,k); X:>,3[hx|  
k = j; YlC$L$%Zd.  
} yog(  
} ?:Sqh1-z  
[BTOs4f  
} PJ))p6 9  
3P*[ !KI  
} [9C{\t  
X|'[\v2ld  
SortUtil: iu iVr$E  
+C36OcmT~  
package org.rut.util.algorithm; ROr|n]aJj  
~f6 Q  
import org.rut.util.algorithm.support.BubbleSort; O +u? Y  
import org.rut.util.algorithm.support.HeapSort; O~OM.:al&  
import org.rut.util.algorithm.support.ImprovedMergeSort; AsfmH-4)  
import org.rut.util.algorithm.support.ImprovedQuickSort; nu `R(2/  
import org.rut.util.algorithm.support.InsertSort; L2Fi/UWM  
import org.rut.util.algorithm.support.MergeSort; (:>Sh0.  
import org.rut.util.algorithm.support.QuickSort; B%I<6E[D  
import org.rut.util.algorithm.support.SelectionSort; z7s}-w,  
import org.rut.util.algorithm.support.ShellSort; veAdk9  
Eh+m|A  
/** [{q])P;  
* @author treeroot tiPZ.a~k  
* @since 2006-2-2 {U)q)  
* @version 1.0 yIu_DFq%  
*/ a_ \t(U  
public class SortUtil { O?f?{Jsx  
public final static int INSERT = 1; u\3=m%1  
public final static int BUBBLE = 2; YS bS.tq  
public final static int SELECTION = 3; {%D4%X<  
public final static int SHELL = 4; pG^>y0  
public final static int QUICK = 5; uC|bC#;  
public final static int IMPROVED_QUICK = 6; %$&_!  
public final static int MERGE = 7; WS.lDMYE7  
public final static int IMPROVED_MERGE = 8; QKIg5I-  
public final static int HEAP = 9; MmQk@~  
T2}X~A  
public static void sort(int[] data) { =<X4LO)C  
sort(data, IMPROVED_QUICK); GGU>={D)  
} {#,?K  
private static String[] name={ 2-%9k)KH  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wW, n~W  
}; 3~\,VO''  
gLwrYG7@  
private static Sort[] impl=new Sort[]{ .1:B\ R((  
new InsertSort(), @5h(bLEP  
new BubbleSort(), ,0@QBr5P  
new SelectionSort(), &&7&/   
new ShellSort(), M%bD7naBq  
new QuickSort(), r<[G~n  
new ImprovedQuickSort(), hf:\^w  
new MergeSort(), hz+c]K  
new ImprovedMergeSort(), Z=be ki]  
new HeapSort() =J`M}BBx  
}; `h~-  
*{(tg~2'(  
public static String toString(int algorithm){ bAEwjZ  
return name[algorithm-1]; [JEf P/n|.  
} AEd9H +I  
9z+ZFIf7d  
public static void sort(int[] data, int algorithm) { :pLaxWus!  
impl[algorithm-1].sort(data); EGzlRSgO  
} A3.*d:A  
n^Q-K}!T/  
public static interface Sort { dN@C)5pm5`  
public void sort(int[] data); S])*LUi  
} G5NAwpZf  
Ry40:;MYN  
public static void swap(int[] data, int i, int j) { jt0f*e YE8  
int temp = data; j/F:j5O*  
data = data[j]; sn8l3h)  
data[j] = temp; J; N\q  
} L]E.TvM1*  
} oxug  
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