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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。 jP"='6Vrw  
插入排序: ;=ERm=  
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package org.rut.util.algorithm.support; Jro%zZle  
3HmJixy  
import org.rut.util.algorithm.SortUtil; 2SVJKX_V+  
/** [mI;>q  
* @author treeroot K~>ESMZ5  
* @since 2006-2-2 {d,~=s0T  
* @version 1.0 rv97Wm+  
*/ @460r  
public class InsertSort implements SortUtil.Sort{ Gl>_C@n0h  
!tofO|E5  
/* (non-Javadoc) .Cf`D tK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -}*YfwK  
*/ MXU8QVSY"  
public void sort(int[] data) { 41`&/9:"_M  
int temp; 4m$Xjj`vE  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "*aL(R  
} dD8f`*"*=  
} HBnnIbEtF'  
} )[hQK_e]  
5S ?+03h~  
} [S!_ubP5  
)o8]MWT\;  
冒泡排序: pO_L,~<  
({AqL#x`u  
package org.rut.util.algorithm.support; J'>i3e Lq  
tO ^KCnL  
import org.rut.util.algorithm.SortUtil; ~<#!yRy>r  
U#!f^@&AB  
/** !G3d5d2)C  
* @author treeroot A5> ,e|  
* @since 2006-2-2 |cE 69UFB  
* @version 1.0 $>fMu   
*/ Z6`[ dAo  
public class BubbleSort implements SortUtil.Sort{ 2oFHP_HVfu  
As7Y4w*+  
/* (non-Javadoc) mN:p=.& <  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RK`C31Ws  
*/ ?N*|S)BN  
public void sort(int[] data) { r8E)GBH-|  
int temp; /Z*XKIU6v/  
for(int i=0;i for(int j=data.length-1;j>i;j--){ g4 |s9RMD  
if(data[j] SortUtil.swap(data,j,j-1); JH;\wfr D  
} 7 a}qnk %  
} DVq 5[ntG  
} .3.oan*i  
} gf8DhiB  
eD481r  
} L(2KC>GvA  
%kJ_o*"  
选择排序: pkL&j<{  
Yw\PmRL"p  
package org.rut.util.algorithm.support; fc #zhp5bX  
&u'$q  
import org.rut.util.algorithm.SortUtil; $fwv'  
2%Y]M%P  
/** KGsH3{r  
* @author treeroot 5 5_#?vw  
* @since 2006-2-2 `'{>2d%\g  
* @version 1.0 (0T6kD  
*/ VY5/C;0^h  
public class SelectionSort implements SortUtil.Sort { KPOr8=Rc  
_cY!\'  
/*  !Z'x h +  
* (non-Javadoc) |h; _r&  
* u!As?AD.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D^knN-nZ*  
*/ ,wN>,(  
public void sort(int[] data) { ?m?DAd~ZY  
int temp; 02_%a1g  
for (int i = 0; i < data.length; i++) { #FBq8iJ  
int lowIndex = i; U]Vu8$W  
for (int j = data.length - 1; j > i; j--) { :! h1S`wS  
if (data[j] < data[lowIndex]) { OXs-gC{b  
lowIndex = j; c.u$NnDU6  
} wYrb P11  
} m|)Mc VV  
SortUtil.swap(data,i,lowIndex); C[ ehw  
} I'h6!N"  
} 0P<bS?e<l  
Lii,L}  
} w{t2Oo6Q0+  
_BV'J92.  
Shell排序: 9oK#n'hjb  
=!b<@41  
package org.rut.util.algorithm.support; G02(dj  
|[ tlR`A$  
import org.rut.util.algorithm.SortUtil; PyD'lsV  
vPn(~d_  
/** *.UM[Wo  
* @author treeroot ,&;#$ b5  
* @since 2006-2-2 yu'2  
* @version 1.0 El~x$X*  
*/ F8J;L](Dq  
public class ShellSort implements SortUtil.Sort{ 8v},&rhPQq  
\o-Q9V  
/* (non-Javadoc) LP8Stj JP  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #[^?f[ 9r  
*/ v(? ^#C>6W  
public void sort(int[] data) { ,iXE3TN;W  
for(int i=data.length/2;i>2;i/=2){ C w<bu|?  
for(int j=0;j insertSort(data,j,i); .~+I"V{y F  
} <Q06<{]R8  
} 8$:4~:]/  
insertSort(data,0,1); >g!a\=-[  
} n1n1 }  
!4 4)=xW  
/** c5?;^a[  
* @param data #HD$=ECcw  
* @param j x:`]uOp  
* @param i sglYT!O  
*/ 5TqT`XTzm  
private void insertSort(int[] data, int start, int inc) { ~ N+bD  
int temp; +)C?v&N  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); QfuKpcT &  
} d~](S<k  
} ^FJ=/#@T  
} ;&Q8xC2  
P#/k5]g  
} IS`1}i$1%  
{%$eq{~m  
快速排序: xF'9`y^]!@  
t> J 43  
package org.rut.util.algorithm.support; ANNfL9:Jy  
OAu ?F}O  
import org.rut.util.algorithm.SortUtil; }LDH/# u  
_7(>0GY  
/** aHosu=NK  
* @author treeroot Ctpr.  
* @since 2006-2-2 #%4-zNS  
* @version 1.0 #{)=%5=c  
*/ =} Np0UP  
public class QuickSort implements SortUtil.Sort{ )1%l$W  
>5{Z'UWxh  
/* (non-Javadoc) lHBk&UN'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >yC1X|d~t  
*/ +$KUy>  
public void sort(int[] data) { Np4';H  
quickSort(data,0,data.length-1); Hmt} @  
} nYJ)M AG@  
private void quickSort(int[] data,int i,int j){ w(O/mUDX  
int pivotIndex=(i+j)/2; \$Xo5f<  
file://swap 12\h| S~  
SortUtil.swap(data,pivotIndex,j); !Pf_he  
T6[];|%W  
int k=partition(data,i-1,j,data[j]); ^YddVp  
SortUtil.swap(data,k,j); A"t~ )  
if((k-i)>1) quickSort(data,i,k-1); c <8s \2  
if((j-k)>1) quickSort(data,k+1,j); xEN""*Q  
C zKU;~D=B  
} *f8; #.Re  
/** COe"te  
* @param data C%ibIcm y  
* @param i eRkvNI  
* @param j -~O7.E(ok  
* @return <]6])f,y\  
*/ pp$WM\r  
private int partition(int[] data, int l, int r,int pivot) { 5;wA7@  
do{ 3okh'P%+  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); #9Z\jW6b  
SortUtil.swap(data,l,r); 0?} ),8v>  
} MA\"JAP/  
while(l SortUtil.swap(data,l,r); A`Vz5WB  
return l; `mTpL^f  
} xSFY8  
V)M+dhl  
} Q}p+/-U\  
TfaL5evio  
改进后的快速排序: L>~wcoB  
R=g~od[N_  
package org.rut.util.algorithm.support; 7iCH$}  
gs)wQgJ[  
import org.rut.util.algorithm.SortUtil; !|hxr#q=4  
t\ J5np  
/** M>+FIb(  
* @author treeroot &kKopJH  
* @since 2006-2-2 ?-CZJr  
* @version 1.0 ',L>UIXw  
*/ (Zi(6 T\z  
public class ImprovedQuickSort implements SortUtil.Sort { SoZ$1$o2  
tz&'!n}  
private static int MAX_STACK_SIZE=4096; h2g|D(u)  
private static int THRESHOLD=10; X~ n=U4s}O  
/* (non-Javadoc) $]IX11.m  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5)fEs.r0U  
*/ <[O8 {9j  
public void sort(int[] data) { |7Fe~TC  
int[] stack=new int[MAX_STACK_SIZE]; J;|r00M  
7`;55Se  
int top=-1; hGmJG,H  
int pivot; (q'w"qj  
int pivotIndex,l,r; -oo&8  
G+N &(:  
stack[++top]=0; T 9Jv  
stack[++top]=data.length-1; mM.-MIp  
%Q:i6 ~  
while(top>0){ X;Tayb  
int j=stack[top--]; o7"2"( =>  
int i=stack[top--]; mJT<  
DC4,*a~  
pivotIndex=(i+j)/2; ?4%'6R  
pivot=data[pivotIndex]; PjriAlxD  
ea-NqdGs;m  
SortUtil.swap(data,pivotIndex,j); @vWf-\  
 PZZTRgVc  
file://partition c,%9Fh?(  
l=i-1; mo1(dyjx  
r=j; 1vlRzkd  
do{ 5y07@x  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); YEF|SEon0  
SortUtil.swap(data,l,r); _:ypPR J  
} >[TB8  
while(l SortUtil.swap(data,l,r); RD_IGV   
SortUtil.swap(data,l,j);  B9IqX  
E6(OEC%,  
if((l-i)>THRESHOLD){ }t!,{ZryE1  
stack[++top]=i; ]Igd<  
stack[++top]=l-1; *sI`+4h[  
} 8 x$BbK  
if((j-l)>THRESHOLD){ "YbvI@pD  
stack[++top]=l+1; gJn|G#!  
stack[++top]=j; .a._WZF  
} N yT|=`;  
RUHQ]@d#T  
} @T53%v<5  
file://new InsertSort().sort(data); b~?FV>gl  
insertSort(data); m1DzU q;  
} :A%|'HxH3  
/** vJ9 6qX  
* @param data ~IvAnwQ'  
*/ iHy=92/Ww  
private void insertSort(int[] data) { kfaRN ^  
int temp; KLpu7D5(|  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); w'[lIEP 2$  
} ]$[J_f*x  
} ax{+7  k  
} ;O=tSEe  
W =YFe<Q  
} %Od?(m"&  
.>z)6S_G  
归并排序: )-$Od2u2c  
9-)D"ZhLe  
package org.rut.util.algorithm.support; [4uTp[U!r  
<4,hrx&.  
import org.rut.util.algorithm.SortUtil; ,4$ZB(\  
L{fKZ  
/** r )8[LN-  
* @author treeroot t,$4J6  
* @since 2006-2-2 vt0XCUnK  
* @version 1.0 .nCF`5T!  
*/ 7\*_/[B  
public class MergeSort implements SortUtil.Sort{ J6Uo+0S  
*,g|I8?%VD  
/* (non-Javadoc) j:'sbU  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g.-{=kZ   
*/ a4HUP*  
public void sort(int[] data) { }RX[J0Prq~  
int[] temp=new int[data.length]; L&3Ak}sh  
mergeSort(data,temp,0,data.length-1); l}-JtZ?[?  
} p/jC}[$v  
@]r,cPx0Y  
private void mergeSort(int[] data,int[] temp,int l,int r){ H8d%_jCr  
int mid=(l+r)/2; *FoH '\=  
if(l==r) return ; ~"eos~AuW  
mergeSort(data,temp,l,mid); ZMO7 o 1"  
mergeSort(data,temp,mid+1,r); G+Ft2/+\  
for(int i=l;i<=r;i++){ A:$Qt%c  
temp=data; 5Ug.J{d  
} df_hmkyj  
int i1=l; X yi[z tN  
int i2=mid+1;  JvFd2@  
for(int cur=l;cur<=r;cur++){ g?,\bmHE  
if(i1==mid+1) 7b7~D +b  
data[cur]=temp[i2++]; J})G l  
else if(i2>r) f 7B)iI!  
data[cur]=temp[i1++]; =0,:w(Sb!  
else if(temp[i1] data[cur]=temp[i1++]; v'`VyXetl  
else hM~9p{O  
data[cur]=temp[i2++]; 2pR+2p`  
} `I|$U)'  
} (V2~txMh  
b77Iw%x7  
} &NbhQY`k  
|F)BKo D  
改进后的归并排序:  ismx evD  
,CiN@T \&  
package org.rut.util.algorithm.support; 0 XV8 B  
,PH;j_  
import org.rut.util.algorithm.SortUtil; ~,[<R  
``*iK  
/** r;}%} /IX  
* @author treeroot LIfQh  
* @since 2006-2-2 @=CN#D12  
* @version 1.0 = GUgb2TAT  
*/  + ]I7]  
public class ImprovedMergeSort implements SortUtil.Sort { ;&mefaFlWp  
_*\:UBZx6  
private static final int THRESHOLD = 10; Fc{M N"  
)C^ZzmB  
/* s;!TB6b@  
* (non-Javadoc) chw6_ctR>  
* r8.R?5F@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U .?N  
*/ MrXmX[1-  
public void sort(int[] data) { _P6e%O8C#  
int[] temp=new int[data.length]; 3[mVPV  
mergeSort(data,temp,0,data.length-1); %JUD54bBt  
} 5>z`==N)  
_a?c,<A  
private void mergeSort(int[] data, int[] temp, int l, int r) { \09m ?;^  
int i, j, k; RsnK B /  
int mid = (l + r) / 2; Nn/me  
if (l == r) Ql`N)!  
return; /)6+I(H  
if ((mid - l) >= THRESHOLD) quXL'g  
mergeSort(data, temp, l, mid); #mhR^60,  
else 7l Q@I}i  
insertSort(data, l, mid - l + 1); NDsF<2A4  
if ((r - mid) > THRESHOLD) `M0m`Up  
mergeSort(data, temp, mid + 1, r); ?` ?HqR0  
else H@ab]&  
insertSort(data, mid + 1, r - mid); |~)!8N.{  
sw<GlF"  
for (i = l; i <= mid; i++) { R_? Q`+X  
temp = data; ]w7wwU^^*U  
} R@ksYC3 F  
for (j = 1; j <= r - mid; j++) { Mn`);[  
temp[r - j + 1] = data[j + mid]; D^]g`V*N  
} .|ZO2MCd  
int a = temp[l]; IRWVoCc9/\  
int b = temp[r]; p7H0|>  
for (i = l, j = r, k = l; k <= r; k++) { g!/O)X3  
if (a < b) { Ife/:v  
data[k] = temp[i++]; >@Vap  
a = temp; =i'APeNaQ  
} else { 3a|I| NP  
data[k] = temp[j--]; Sfl. &A(  
b = temp[j]; be^+X[  
} -zn$h$N4  
} Z=c&</9e  
} ),DLrGOl  
~`Uil=  
/** =;HC7TUM&  
* @param data cp| q  
* @param l /6Bm <k%  
* @param i =r1-M.*a.M  
*/ X ? eCK,  
private void insertSort(int[] data, int start, int len) { |aD8  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aK|],L  
} =}F}XSvXH  
} d8N{sT  
} ,,}& Q%5  
} l~mC$>f  
eMHBY6<~=  
堆排序: $U*b;'o  
;RR\ Hwix  
package org.rut.util.algorithm.support; ~<Eu @8+_  
t=(d, kf  
import org.rut.util.algorithm.SortUtil; CdZS"I  
g \;,NW^  
/** SN#Cnu}  
* @author treeroot 8uh^%La8b.  
* @since 2006-2-2 ,8Eg/  
* @version 1.0 fYgEiap  
*/ rt8"U <~  
public class HeapSort implements SortUtil.Sort{ dbe\ YE  
f;{K+\T  
/* (non-Javadoc) 4:zyZu3fm  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rq(9w*MW:  
*/ bukdyo;l  
public void sort(int[] data) { s:/Wz39SY3  
MaxHeap h=new MaxHeap(); #[odjSb  
h.init(data); $j(laD#AR  
for(int i=0;i h.remove(); ]H {g/C{j  
System.arraycopy(h.queue,1,data,0,data.length); QgF2f/;!  
} #MyF 1E  
8wH1x .  
private static class MaxHeap{ }uFV\1  
\281X  
void init(int[] data){ ka c-@  
this.queue=new int[data.length+1]; (C9{|T+h  
for(int i=0;i queue[++size]=data; :|&S7 &l]  
fixUp(size); ~pt#'65}:  
} ]broU%#"  
} F2)\%HR  
TdKo"H*C  
private int size=0; ^ }kqAmr  
#Fkn-/nL  
private int[] queue; G=( ja?d  
tNf_,]u  
public int get() { q;Rhx"x>T  
return queue[1]; 1sNZl&  
} ]K-B#D{P  
7X{@$>+S  
public void remove() { WupONrH1e  
SortUtil.swap(queue,1,size--); $ ?*XPzZ  
fixDown(1); Q$^)z_jai  
} 49!(Sa_]j  
file://fixdown  i|!D  
private void fixDown(int k) { ?{]"UnyVE*  
int j; Yc`PK =!l  
while ((j = k << 1) <= size) { INNTp[  
if (j < size %26amp;%26amp; queue[j] j++; WQ1K8B4  
if (queue[k]>queue[j]) file://不用交换 VJbn/5+P  
break; O5v~wLx9e  
SortUtil.swap(queue,j,k); FT;I|+H*P  
k = j; os[i  
} cv7.=*Kb;  
} rD!UP1Nb  
private void fixUp(int k) { _m@+d>f_  
while (k > 1) { ALi3JU  
int j = k >> 1; Iy;bzHXs  
if (queue[j]>queue[k]) /4>|6l=  
break; yD yMI  
SortUtil.swap(queue,j,k); ' JAcN@q~z  
k = j; 4<btWbk5u*  
} Uqd2{fji=#  
} ~Q2,~9Dkc  
h[& \ OD,P  
} L"It0C  
[P3 Z"&  
} WNp-V02l  
ekPn`U  
SortUtil: ,|^ lqY  
H=@S+4_bK  
package org.rut.util.algorithm; S<o\.&J  
\E8CC>Jd  
import org.rut.util.algorithm.support.BubbleSort; S{S.H?{F  
import org.rut.util.algorithm.support.HeapSort; 8,&pX ga  
import org.rut.util.algorithm.support.ImprovedMergeSort; 1$v1:6  
import org.rut.util.algorithm.support.ImprovedQuickSort; `ZPV.u/  
import org.rut.util.algorithm.support.InsertSort; um=qT)/D  
import org.rut.util.algorithm.support.MergeSort; /g\m7m)u  
import org.rut.util.algorithm.support.QuickSort; !{S HlS  
import org.rut.util.algorithm.support.SelectionSort; ' fka?lL  
import org.rut.util.algorithm.support.ShellSort; 9RQw6rL  
{SwvUWOf"  
/** CuA A)Bj  
* @author treeroot V\/5H~L  
* @since 2006-2-2 yIf>8ed]#  
* @version 1.0 J%1 2Ey@6  
*/ i{MzQE+_^  
public class SortUtil { pIgjo>K  
public final static int INSERT = 1; ` 7jdV  
public final static int BUBBLE = 2; D {N,7kT  
public final static int SELECTION = 3; qM9> x:V  
public final static int SHELL = 4; ]}9D*V  
public final static int QUICK = 5; aMO+ y91Y(  
public final static int IMPROVED_QUICK = 6; - -ZSl  
public final static int MERGE = 7; %&&;06GU}  
public final static int IMPROVED_MERGE = 8; `y*o -St3  
public final static int HEAP = 9; ZJ'FZ8Sx  
_8s1Wh G  
public static void sort(int[] data) { 8?[#\KgH1  
sort(data, IMPROVED_QUICK); 6B&ERdoX  
} G0Wv=tX|  
private static String[] name={ K&;;{~md.  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]GmXZi  
}; j9 O"!9$vQ  
T?EFY}f  
private static Sort[] impl=new Sort[]{ tS sDW!!M  
new InsertSort(), #RTiWD[o  
new BubbleSort(), _Bq[c  
new SelectionSort(), Qe4"a*l-r  
new ShellSort(), Wu U_R E  
new QuickSort(), 4L/8Hj#g  
new ImprovedQuickSort(), (E<QA  
new MergeSort(), /u pDbP.O  
new ImprovedMergeSort(), h%!N!\  
new HeapSort()  &DX  
}; i4\m/&of3y  
[8rl{~9E  
public static String toString(int algorithm){ X.)D"+xnH  
return name[algorithm-1]; tRmH6  
} &BkdC,o  
gB}UzEj^<  
public static void sort(int[] data, int algorithm) { $LJCup,1"  
impl[algorithm-1].sort(data); b:YyzOqEu  
} #RVN 7-x  
vF .Ml  
public static interface Sort { A9C  
public void sort(int[] data); #]e](j>]  
} O_[]+5.TX  
$ v~I n  
public static void swap(int[] data, int i, int j) { #( o(p  
int temp = data; [a\>"I\[  
data = data[j]; RtScv  
data[j] = temp; BV512+M  
} b(?A^ a  
} +I_p\/J?w/  
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