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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。 >Rs:Fw|jro  
插入排序: j*<H18^G  
cF3V{b|bU  
package org.rut.util.algorithm.support; vL{sk|2&  
^KhA\MzY  
import org.rut.util.algorithm.SortUtil; qYZX, x  
/** ?8fa/e  
* @author treeroot y} AkF2:  
* @since 2006-2-2 * Ibl+  
* @version 1.0 { :'#Ts<  
*/ 1XU sr;Wz  
public class InsertSort implements SortUtil.Sort{ ZJ'#XZpr  
w0x, ~  
/* (non-Javadoc) Wd?(B4{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SaMg)s~B  
*/ F#eZfj~  
public void sort(int[] data) { ihBlP\C  
int temp; :w:hqe|_  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); z{Z'2,#  
} lhva|  
} v1<3y~'f  
} .Ebg>j:\  
$(K[W}  
} TZTi:\nS  
v^0D  
冒泡排序: e<6fe-g9;  
Z0s}65BR  
package org.rut.util.algorithm.support; b/HhGA0  
/]=Ih  
import org.rut.util.algorithm.SortUtil; sxinA8  
?%dsY\  
/** P!3)-apP\  
* @author treeroot <V0]~3  
* @since 2006-2-2 1p=^I'#  
* @version 1.0 A-Be}A  
*/ rg64f'+Eug  
public class BubbleSort implements SortUtil.Sort{ ?j9J6=2  
ZpvURp,I  
/* (non-Javadoc) $ OB2ZS"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S#_g/3w  
*/ uP2e/a  
public void sort(int[] data) { :6~Nq/hZB  
int temp; 5&Al  
for(int i=0;i for(int j=data.length-1;j>i;j--){ FOVghq@  
if(data[j] SortUtil.swap(data,j,j-1); gpDH_!K  
} ui%B|b&&  
} ,r^zDlS<q  
} r0t4\d_&  
} U27YH1OK  
+ 2 v6fan  
} CAg~K[  
RQxL`7H  
选择排序: Tq{+9+  
rYez$e^r  
package org.rut.util.algorithm.support; /iURP-rl  
'/M9V{DD88  
import org.rut.util.algorithm.SortUtil; N$]B$vv  
1oU/gm$7\q  
/** (:Di/{i&r5  
* @author treeroot G#yv$LY#  
* @since 2006-2-2 *g7BR`Bt]z  
* @version 1.0 !2L?8oP-z  
*/ -wn ,7;  
public class SelectionSort implements SortUtil.Sort { w]L^)_'Th  
ayF+2(vch)  
/* wT\JA4  
* (non-Javadoc) D2}N6i  
* En!X}Owh  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $fifx>!  
*/ ? nx3# <  
public void sort(int[] data) { ((0nJJjz  
int temp; by}C;eN  
for (int i = 0; i < data.length; i++) { k-it#'ll{x  
int lowIndex = i; RvQa&r5l  
for (int j = data.length - 1; j > i; j--) { {:=sCY!  
if (data[j] < data[lowIndex]) { P=3mLz-  
lowIndex = j; V[DiN~H  
} 7:/gO~g I  
} M02 U,!di  
SortUtil.swap(data,i,lowIndex); w?#s)z4}g  
} &|9K~#LVS  
} _c!$K#Yl{  
Gxhr0'  
} '[WVP=M<XV  
<n1panS  
Shell排序: &&PXWR!%]  
X!xmto  
package org.rut.util.algorithm.support; 33},lNS|  
iW%~>`tT  
import org.rut.util.algorithm.SortUtil; gwGw  
ldFR%v> 9  
/** 6 2:FlW>  
* @author treeroot ,A%p9  
* @since 2006-2-2 )JrG`CvdU  
* @version 1.0 ]\Z8MxFD  
*/ C'7DG\pr  
public class ShellSort implements SortUtil.Sort{ a%nf )-}|  
Fy 1- >~  
/* (non-Javadoc) gNHS:k\"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i 558&:  
*/ $c {fPFe-  
public void sort(int[] data) { G^|!'V  
for(int i=data.length/2;i>2;i/=2){ F|a'^:Qs  
for(int j=0;j insertSort(data,j,i); (kTu6t*  
} xp?YM35  
} $ \+x7"pI  
insertSort(data,0,1); s(T0lul  
} )+Y"4?z~  
a]/KJn /B(  
/** ^H0#2hFa  
* @param data >PzZt8e  
* @param j ?W>`skQ  
* @param i b:5-0uxjs  
*/ *Z$W"JP  
private void insertSort(int[] data, int start, int inc) { #;[0:jU0  
int temp; dVs=*GEl9  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); -UM|u_  
} f(G1xw]]@Y  
} 5sANF9o!  
} 9W0*|!tQ,+  
ypgM&"eR  
} d_,Ql708f  
G6.lRaPu"m  
快速排序: C :An  
OxPl0-]t  
package org.rut.util.algorithm.support; O/U?Wq  
L+S)hgUH  
import org.rut.util.algorithm.SortUtil; ]>Ym   
#mU<]O  
/** HC} vO0X4  
* @author treeroot h w ^ V  
* @since 2006-2-2 74ho=  
* @version 1.0 h\p!J-V  
*/ c`/VYgcTqB  
public class QuickSort implements SortUtil.Sort{ <(@Z#%O9)  
_9]vlxgtG(  
/* (non-Javadoc) gV-*z}`U  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '}9 Nvr)+  
*/ Yj'9|4%+|  
public void sort(int[] data) { F b?^+V]9  
quickSort(data,0,data.length-1); 4 ob?M:S  
} 0 @!huk  
private void quickSort(int[] data,int i,int j){ 7~FHn'xt  
int pivotIndex=(i+j)/2; "-djA,`  
file://swap #6 vf:94  
SortUtil.swap(data,pivotIndex,j); ! d<R =L  
2Mk;r*FT  
int k=partition(data,i-1,j,data[j]); 2GORGS%  
SortUtil.swap(data,k,j); `kJ)E;v;3  
if((k-i)>1) quickSort(data,i,k-1); (~eS$8>.  
if((j-k)>1) quickSort(data,k+1,j); nShXY6bA  
@I-,5F|r  
} U#c Gd\b  
/** umWs8-'Uw  
* @param data @"` }%-b  
* @param i JH{/0x#+  
* @param j *1Bq>h:  
* @return ?IYu"UO<)|  
*/ .SjJG67OyA  
private int partition(int[] data, int l, int r,int pivot) { faDS!E' +  
do{ ,{!,%]bC  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); bS;_xDXd  
SortUtil.swap(data,l,r); z?<B@\~  
} I]` RvT  
while(l SortUtil.swap(data,l,r); Mib .,J~  
return l; Gn=b_!  
} {N>ju  
5"@>>"3U  
} {h|<qfH  
W]#w4Fp!  
改进后的快速排序: ,\J 8(,%L  
>U,&V%y  
package org.rut.util.algorithm.support; ,IyQmN y  
#?Kw y  
import org.rut.util.algorithm.SortUtil; 2L1y4nnbwo  
wYf\!]}'  
/** ~*7$aj  
* @author treeroot u0Wt"d-=  
* @since 2006-2-2 &Gh0f"?  
* @version 1.0 F<k+>e  
*/ ?VNtT/  
public class ImprovedQuickSort implements SortUtil.Sort {  >9!J?HA  
z )'9[t  
private static int MAX_STACK_SIZE=4096; v']_)  
private static int THRESHOLD=10; T4] 2R  
/* (non-Javadoc) gMI%!Y  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %jzTQ+.%]^  
*/ 4`Ud\Jm[s  
public void sort(int[] data) { 3A!a7]fW  
int[] stack=new int[MAX_STACK_SIZE]; ,fp+nu8,  
|-x-CSN  
int top=-1; s{@R|5  
int pivot; ot<d FvD  
int pivotIndex,l,r; :oZ<[#p"*  
_ l|%~  
stack[++top]=0; MvpJ0Y (  
stack[++top]=data.length-1; 9>&zOITTaL  
$_"u2"p  
while(top>0){ KAClV%jP  
int j=stack[top--]; p qz~9y~  
int i=stack[top--]; #"4ioTL2  
:|s8v2am  
pivotIndex=(i+j)/2; P:'wSE91  
pivot=data[pivotIndex]; :')[pO_FW*  
>Bb X:  
SortUtil.swap(data,pivotIndex,j); $XhMI;h  
$\BYN=#  
file://partition |T6K?:U7  
l=i-1; 7<xnE]jdq  
r=j; Q-w# !<L.  
do{ 'Tm1Mh0Fso  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ZRxOXt&;  
SortUtil.swap(data,l,r); RE;A 0E_3  
} DEZww9T2Qs  
while(l SortUtil.swap(data,l,r); v8ap"9b  
SortUtil.swap(data,l,j); BX?DI-o^h  
#-;c!<2  
if((l-i)>THRESHOLD){ *&I>3;~%^}  
stack[++top]=i; TN0KS]^A3  
stack[++top]=l-1; cX-M9Cz  
} ",b:rgpRp  
if((j-l)>THRESHOLD){ w ~*@TG  
stack[++top]=l+1; ZIx-mC5  
stack[++top]=j; LU:xmDv  
} v1:.t  
XR+ SjCA  
} %)lp]Y33  
file://new InsertSort().sort(data); /]`@.mZ9:  
insertSort(data); OBAO(Ke  
} @)U.Dbm  
/** ~*iF`T6  
* @param data n-ffX*zA(  
*/ @N Yl4N  
private void insertSort(int[] data) { }emUpju<C  
int temp; AY/.vyS  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 9[.HWe,  
} ~n]5iGz  
} .==D?#bn  
} Q>{$Aqc,e  
FHOw ]"#  
} K}l3t2uk  
rt+4-WuK>  
归并排序: yzS^8,  
>-MnB  
package org.rut.util.algorithm.support; m# {'9 |  
?6:qAFw  
import org.rut.util.algorithm.SortUtil; v+nXKNL  
B"GC|}N )v  
/** U<j5s\Y,  
* @author treeroot 8 1Kf X {|  
* @since 2006-2-2 %OBW/Ti  
* @version 1.0 PF~@@j  
*/ VIp|U{  
public class MergeSort implements SortUtil.Sort{ s>>&3jfM  
!eyLh&]5  
/* (non-Javadoc) O=o}uB-*6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {xTq5`&gT  
*/ rRe5Q  
public void sort(int[] data) { #p(gB)o:l  
int[] temp=new int[data.length]; rbd0`J9fq  
mergeSort(data,temp,0,data.length-1); #`SAc`:n  
} [\ao#f0WR  
doanTF4Da  
private void mergeSort(int[] data,int[] temp,int l,int r){ <X8Urum  
int mid=(l+r)/2; ,j%\3g`  
if(l==r) return ; G+c&e:ip<  
mergeSort(data,temp,l,mid);  V(&L  
mergeSort(data,temp,mid+1,r); iE'_x$i  
for(int i=l;i<=r;i++){ 1TZ[i  
temp=data; ?IGp?R^j"  
} 6Ryc&z5  
int i1=l; M1Q&)am  
int i2=mid+1; P#A,(Bke3  
for(int cur=l;cur<=r;cur++){ XVs]Y'* x  
if(i1==mid+1) >|SIqB<%:  
data[cur]=temp[i2++]; $>/d)o  
else if(i2>r) 85E$m'0O  
data[cur]=temp[i1++]; g}+|0FTV  
else if(temp[i1] data[cur]=temp[i1++]; =IL\T8y09  
else \'y]mB~k  
data[cur]=temp[i2++]; :BxO6@>Xc  
} ;#Po}8Y=  
} =zn'0g, J4  
2O kID WcM  
} !td!">r46e  
]xvA2!) Q  
改进后的归并排序: t!\aDkxo %  
t=7Gfv  
package org.rut.util.algorithm.support; (U 'n1s/X  
oRbWqN`F.  
import org.rut.util.algorithm.SortUtil; ,3?=W/Um4  
!{l% 3'2  
/** j([b)k=  
* @author treeroot a#1r'z~]}  
* @since 2006-2-2 O8Mypv/C  
* @version 1.0 XGZZKvp  
*/ ;W{z"L;nX  
public class ImprovedMergeSort implements SortUtil.Sort { x;[)#>.'  
*A9v8$  
private static final int THRESHOLD = 10; 8J,^O04<  
0j$=KA  
/* bm;iX*~  
* (non-Javadoc) >.SO2w  
* pqg2#@F.  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $l ,U)  
*/ *$7^.eHfdd  
public void sort(int[] data) { Y's=31G@  
int[] temp=new int[data.length]; 1'~+.92Y  
mergeSort(data,temp,0,data.length-1); -, +o*BP  
} }<G a e5  
UusAsezm:  
private void mergeSort(int[] data, int[] temp, int l, int r) { ky !Z JR  
int i, j, k; 5{-Hg[+9  
int mid = (l + r) / 2; U$D:gZ  
if (l == r) ,8*A#cT B  
return; -}@C9Ja[?  
if ((mid - l) >= THRESHOLD) f.ua,,P.  
mergeSort(data, temp, l, mid); 7_Vd%<:  
else ${Lrj}93  
insertSort(data, l, mid - l + 1); (l][_6Q  
if ((r - mid) > THRESHOLD) 0uKm)t/  
mergeSort(data, temp, mid + 1, r); tln}jpCw  
else i.9}bw 9u@  
insertSort(data, mid + 1, r - mid); L e~D"d8  
tqA-X[^  
for (i = l; i <= mid; i++) { !o'a]8  
temp = data; ?z`yNx6  
} '\H & EJ'  
for (j = 1; j <= r - mid; j++) { (QFZM"G  
temp[r - j + 1] = data[j + mid]; )cN=/i  
} bIt{kzuQC  
int a = temp[l]; mC ]Krnx  
int b = temp[r]; ,9|7{j|u  
for (i = l, j = r, k = l; k <= r; k++) { \ bNDeA&l  
if (a < b) { 1|*%  
data[k] = temp[i++]; pC 4uar  
a = temp; $xvwnbq#y  
} else { S@\&^1;4Hv  
data[k] = temp[j--]; ,DKW_F|  
b = temp[j]; 6wiuNGZb  
} .O5|d+S  
} )$Fw<;4  
} @zR_[s  
q+YK NXI  
/** /\jRr7 Cd  
* @param data N}bZdE9F  
* @param l 1i Y?t  
* @param i '@^<c#h]=  
*/ j~2t^Qz  
private void insertSort(int[] data, int start, int len) { "(F:'J} X  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d#,   
} /4BYH?*  
} IOUzj{G#  
} nNM)rW  
} e]jzFm~  
mpCKF=KL.  
堆排序: @(st![i+  
>*w(YB]/$V  
package org.rut.util.algorithm.support; am WIA`n=  
ctC! b{S"@  
import org.rut.util.algorithm.SortUtil; .Wyx#9  
eR1]<Z$W\  
/** ZONe}tv:  
* @author treeroot 9T;l*  
* @since 2006-2-2 N'5!4JUI  
* @version 1.0 BYDOTy/%nJ  
*/ &_6B{Q  
public class HeapSort implements SortUtil.Sort{ T8QRO%t  
BI)$aR  
/* (non-Javadoc) -,xsUw4  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9%uJ:c?  
*/ Y1F P |  
public void sort(int[] data) { dJg72?"ka  
MaxHeap h=new MaxHeap(); /?8rj3  
h.init(data); a_(vpD^  
for(int i=0;i h.remove(); 78+PG(Q_M  
System.arraycopy(h.queue,1,data,0,data.length); *j= whdw%J  
} hz+x)M`Y  
b{d@:"  
private static class MaxHeap{ sz b],)|18  
r(qU~re'  
void init(int[] data){ 5SY(:!  
this.queue=new int[data.length+1]; a)8M'f_z  
for(int i=0;i queue[++size]=data; {#1}YGpiVM  
fixUp(size); '.DFyHsq  
} wg,w;Gle  
} RV:%^=V-  
-z4pI=  
private int size=0; 1vBXO bk  
jkIgEF2d*  
private int[] queue; O}#h^AU-BS  
n P4DHb&5  
public int get() { 4jl-?  
return queue[1]; A|d(5{:N  
} DrB PC@^  
!N1DJd  
public void remove() { oUBn:Ir@  
SortUtil.swap(queue,1,size--); !8O*)=RA  
fixDown(1); 8FThu[  
} H?>R#Ds-  
file://fixdown _YW1Mk1  
private void fixDown(int k) { 0xM\+R~,  
int j; _ZfJfd~  
while ((j = k << 1) <= size) { /K9Tn  
if (j < size %26amp;%26amp; queue[j] j++; qJN2\e2~f  
if (queue[k]>queue[j]) file://不用交换 }Z_w8+BZ  
break; -P<e-V%<  
SortUtil.swap(queue,j,k); ]QS? fs Z  
k = j; m. G}# /  
} d-=/@N!4e  
} S]3t{s#JW7  
private void fixUp(int k) { x\Bl^1&  
while (k > 1) { RAQi&?Ko  
int j = k >> 1; --S2lN/:T  
if (queue[j]>queue[k]) @<tkwu  
break; v'*#P7%Kf  
SortUtil.swap(queue,j,k); pN"d~Z8  
k = j; mh"&KX86W  
} LuB-9[^<  
} hSq3LoHV  
DDT)l+:XP  
}  DKu4e  
8=H!&+aGh  
} s HSZIkB-r  
H\7Qf8s|{  
SortUtil: t%wC~1  
jX79Nm|  
package org.rut.util.algorithm; $UAmUQg)}_  
t/\J  
import org.rut.util.algorithm.support.BubbleSort; #=@( m.k:s  
import org.rut.util.algorithm.support.HeapSort; .AOf-a  
import org.rut.util.algorithm.support.ImprovedMergeSort; pDO&I]S`q0  
import org.rut.util.algorithm.support.ImprovedQuickSort; o })k@-oL  
import org.rut.util.algorithm.support.InsertSort; Q"KD O-t  
import org.rut.util.algorithm.support.MergeSort; mYf7?I~  
import org.rut.util.algorithm.support.QuickSort; F'DO46  
import org.rut.util.algorithm.support.SelectionSort; qr[H0f]  
import org.rut.util.algorithm.support.ShellSort; mr]IxTv  
f\FubL  
/** SyFO f  
* @author treeroot TOp|Qtn  
* @since 2006-2-2 b/:&iG;  
* @version 1.0 gwtR<2,p  
*/ FOxMt;|M  
public class SortUtil { y-qbK0=X4  
public final static int INSERT = 1; ^T83E}  
public final static int BUBBLE = 2; >L F y:a  
public final static int SELECTION = 3; dHV3d'.P  
public final static int SHELL = 4; s+;J`_M  
public final static int QUICK = 5; A` x_M!m  
public final static int IMPROVED_QUICK = 6; (a0q*iC%  
public final static int MERGE = 7; L|Zja*  
public final static int IMPROVED_MERGE = 8; G j[`r  
public final static int HEAP = 9; pZ?7'+u$L  
i#o:V/Z .  
public static void sort(int[] data) { @0cQ4}  
sort(data, IMPROVED_QUICK); [;3` Aw  
} ]03+8 #J  
private static String[] name={ $Cw> z^}u  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J0@<6~V6o  
}; ##~";j  
JX%B_eUlAs  
private static Sort[] impl=new Sort[]{ B2\R#&X.  
new InsertSort(), @C]]VE  
new BubbleSort(), 42X N*br  
new SelectionSort(), :r%H sur(  
new ShellSort(), Gq_rZo(@  
new QuickSort(), by z2u  
new ImprovedQuickSort(), a g Za+a  
new MergeSort(), 0F$;]zg  
new ImprovedMergeSort(), PMER~}^  
new HeapSort() ^V]DQ%v"I  
}; <BoDLvW>  
nX,2jT;@L  
public static String toString(int algorithm){ *k)v#;B  
return name[algorithm-1]; FV>j !>Y  
} kigq(a  
X=O}k&  
public static void sort(int[] data, int algorithm) { DA'A-C2  
impl[algorithm-1].sort(data); VJ1(|v{D4[  
} 6q^Tq {I  
>iefEv\  
public static interface Sort {  g wM~W  
public void sort(int[] data); _jkH}o '  
} W\xM$#)m  
T8|aFoHCK  
public static void swap(int[] data, int i, int j) { .yp"6S^b  
int temp = data; Xq"@Z  
data = data[j]; d5?"GFy  
data[j] = temp; TNY d_:j  
} ^zjQ(ca@"x  
} a o_A %?Ld  
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