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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。 e8#83|h  
插入排序: B2a#:E,6  
3:xKq4?  
package org.rut.util.algorithm.support; |I29m`  
#9F>21UU  
import org.rut.util.algorithm.SortUtil; Tj{3#?]Ho  
/** O .-n&U9  
* @author treeroot El: @l %  
* @since 2006-2-2 TdT`V f  
* @version 1.0 #TC}paIpj  
*/ Yl:[b{Py  
public class InsertSort implements SortUtil.Sort{ jA[Ir3  
o*ucw3s>  
/* (non-Javadoc) ek]nLN  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 ltW9^cF}  
*/ e+D]9wM8  
public void sort(int[] data) { }`%ks  
int temp; 9%"`9j~H>  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); k7;i^$@c  
} SM2N3"\  
} !pkIaCxs  
} !n P4S)A  
^FkB/j  
} *Ms"{+C  
XgM&0lVT  
冒泡排序: aM(#J7;  
{ 0&l*@c&  
package org.rut.util.algorithm.support; ';My"/ Z-  
ZoSyc--Bv  
import org.rut.util.algorithm.SortUtil; ! K_<hNG&  
V*5v JF0j  
/** yT5OFD|T  
* @author treeroot S'kgpF"bm  
* @since 2006-2-2 0NKgtH~+  
* @version 1.0 i3Bpim.  
*/ `9+R]C]z8  
public class BubbleSort implements SortUtil.Sort{ q=D8 Nz  
6H5o/)Q~  
/* (non-Javadoc) &5${k'  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hayJgkZ '  
*/ tHHJ|4C  
public void sort(int[] data) { k?TZY|_  
int temp; c@"FV,L>  
for(int i=0;i for(int j=data.length-1;j>i;j--){ /<IWdy]$3  
if(data[j] SortUtil.swap(data,j,j-1); / o I 4&W  
} B RskxyL&,  
} l|E4 7@#  
} (GC5r#AnS  
} N3aqNRwlk  
+,AzxP _y  
} |+::sL\r  
$u'"C|>8  
选择排序: FQ1B%u|  
sgGA0af  
package org.rut.util.algorithm.support; |iX>hJSl  
s%`l>#H  
import org.rut.util.algorithm.SortUtil; H.E=m0 np  
lS7L|  
/** )lJAMZ 5xp  
* @author treeroot q5=,\S3=  
* @since 2006-2-2 unew XHA  
* @version 1.0 JGTsVa2  
*/ Rvx 7}ZL!  
public class SelectionSort implements SortUtil.Sort { *<y9.\z Y<  
j/=Tj'S?D  
/* /|P{t{^WM  
* (non-Javadoc) k{{3nenAG  
* l9="ccM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Skg/iH"(  
*/ ".$kOH_:  
public void sort(int[] data) { &]RE 5!  
int temp; 6QbDU[  
for (int i = 0; i < data.length; i++) { zGyRzxFN  
int lowIndex = i; jll:Rh(b  
for (int j = data.length - 1; j > i; j--) { 2EZ7Vdz2  
if (data[j] < data[lowIndex]) { K8MET&  
lowIndex = j; rTR"\u7&H  
} 5X+`aB  
} ![\P/1p  
SortUtil.swap(data,i,lowIndex); UhL1Y NF_  
} .'_}:~  
} d~%7A5  
dVj2x-R)  
} Ys}^ hy  
`N.:3]B t  
Shell排序: D6Aa5&rO+  
KB|mtsi  
package org.rut.util.algorithm.support; .24z+|j  
u*P@Nuy6  
import org.rut.util.algorithm.SortUtil; E z}1Xse  
lGWz  
/** UCfouQCj  
* @author treeroot RH<2f5-sC!  
* @since 2006-2-2 pC,[!>0g8  
* @version 1.0 -sKtT 9o  
*/ i]? Eq?k  
public class ShellSort implements SortUtil.Sort{ eT3!"+p-F  
k89N}MA   
/* (non-Javadoc) ;5[ OS8  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {m~)~/z?  
*/ r|4D.O]  
public void sort(int[] data) { -"JmQ Fha  
for(int i=data.length/2;i>2;i/=2){ =LV-n  
for(int j=0;j insertSort(data,j,i); jIe /X]  
} &T0]tzk*,  
} hN!;Tny  
insertSort(data,0,1); 9GCK3  
} \zg R]|  
v9* +@  
/** ph6'(,  
* @param data JFX}))7  
* @param j x cAs}y}  
* @param i dLb$3!3  
*/ iY07lvG<  
private void insertSort(int[] data, int start, int inc) { Vlz\n  
int temp; :qbU@)p*  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 1-? i*C  
} q#mL-3OQ  
} c:.5@eq^  
} c:0n/DC  
7,p.M)t)  
} I1':&l^O  
Ly8=SIZ   
快速排序: r/AOgS  
L5 `k3ap|  
package org.rut.util.algorithm.support; 1] =X  
Bc }o3oc  
import org.rut.util.algorithm.SortUtil; 8\P,2RSnt  
CqC )H7A  
/** >YWK"~|i~  
* @author treeroot :stHc,  
* @since 2006-2-2 ;.sYE/ZVi  
* @version 1.0 z*jaA;#  
*/ o[_,r]%+D  
public class QuickSort implements SortUtil.Sort{ i4i9EvWp  
T~/>U&k}J  
/* (non-Javadoc) &t<g K D  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )e3w-es~4  
*/ lG'D/#  
public void sort(int[] data) { i *:QbMb  
quickSort(data,0,data.length-1); Gn^lF7yE  
} $%bd`d*S  
private void quickSort(int[] data,int i,int j){ `B3-#!2X  
int pivotIndex=(i+j)/2; CUH u=  
file://swap lBFKfLp&  
SortUtil.swap(data,pivotIndex,j); myX&Z F_9  
59 g//;35@  
int k=partition(data,i-1,j,data[j]); *Oy* \cX2[  
SortUtil.swap(data,k,j); SzB<PP2  
if((k-i)>1) quickSort(data,i,k-1); ^$'z#ZN1  
if((j-k)>1) quickSort(data,k+1,j); MnFrQC  
zuN(~>YH  
} ._tEDY/1m  
/** ps2j]g  
* @param data vv,<#4d  
* @param i a_}C*+D  
* @param j }(u:K}8  
* @return 7Ji'7$  
*/ U=KUx  
private int partition(int[] data, int l, int r,int pivot) { JjI1^FRd  
do{ .-HM{6J  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 9F 3,  
SortUtil.swap(data,l,r); l#v52  
} ',`Qx{tQ)  
while(l SortUtil.swap(data,l,r); ;6hoG(3 +  
return l; J1O1! .  
} ``g  
g`'!Vgd?M[  
} :F"IOPfU5[  
",aNYJR>*!  
改进后的快速排序: T;BFO5G@  
g$e|y#Ic$  
package org.rut.util.algorithm.support; =gSc{ i|  
6 M:?W"  
import org.rut.util.algorithm.SortUtil; g,iW^M  
OT$ Ne  
/** bnkZWw'9  
* @author treeroot a_+3, fP  
* @since 2006-2-2 DRRQ] eK0  
* @version 1.0 2 ^"j]g>mj  
*/ 1qAE)8ie  
public class ImprovedQuickSort implements SortUtil.Sort { |)>+& xk  
egA* x*8  
private static int MAX_STACK_SIZE=4096; R%n*wGi_6b  
private static int THRESHOLD=10; c0e[vrP:  
/* (non-Javadoc) A405igF  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I@VzH(da\  
*/ 2jhJXM=~  
public void sort(int[] data) { b 4^O=  
int[] stack=new int[MAX_STACK_SIZE]; s% R,]q  
c oZK  
int top=-1; -32P}58R  
int pivot; O{ 3X`xAf  
int pivotIndex,l,r; 4KxuSI^q  
M]Vi]s  
stack[++top]=0; dKEy6C"@  
stack[++top]=data.length-1; _oa*E2VN  
Ii}{{1N6  
while(top>0){ ua=7YG  
int j=stack[top--]; tR9iFv_  
int i=stack[top--]; pLF,rOb  
$A5O>  
pivotIndex=(i+j)/2; d5LBL'/o  
pivot=data[pivotIndex]; 4s%zvRu  
oVP,a r0G  
SortUtil.swap(data,pivotIndex,j); "h1ek*(?<  
~~&Bp_9QXN  
file://partition k9H}nP$F  
l=i-1; JDa_;bqL  
r=j; I8@leT\9M  
do{ QhTn9S:D  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); (  -q0!]E  
SortUtil.swap(data,l,r); zobFUFx  
} %/\sn<6C}  
while(l SortUtil.swap(data,l,r); -0;{  
SortUtil.swap(data,l,j); WRbdv{ 1E  
-@w}}BR  
if((l-i)>THRESHOLD){ 7~1Fy{tc  
stack[++top]=i; wO!>kc<  
stack[++top]=l-1; ncUhCp?'  
} :0%[u(  
if((j-l)>THRESHOLD){ )!VJ\  
stack[++top]=l+1;  = v?V  
stack[++top]=j; )L "Dt_t  
} n87Uf$  
l_04b];  
} m7A3i<6p  
file://new InsertSort().sort(data); F&7Z(  
insertSort(data); krlebPs[  
} 'Q]Wk75  
/** &uaSp, L  
* @param data PQF 40g1}  
*/ ".AW   
private void insertSort(int[] data) { Cv>~%<   
int temp; "IJ1b~j?  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); @pJ;L1sn  
} I WT|dA >  
} AYoTCi%7E  
} 4R01QSbd  
2C"i2/NH'  
} -; d{}F  
-`spu)  
归并排序: !3c+}j-j  
ESIeZhXVH  
package org.rut.util.algorithm.support; pXQ$n:e  
d{WOO)j  
import org.rut.util.algorithm.SortUtil; ) .V,zmI  
SFP?ND+7  
/** &jnBDr  
* @author treeroot GX.a!XQ@!  
* @since 2006-2-2 n sN n>{  
* @version 1.0 (yT&&_zY4  
*/ K-.%1d@$y  
public class MergeSort implements SortUtil.Sort{ 2=7[r-*E  
%[L/JJbP&Z  
/* (non-Javadoc) \Yv4 4*I`  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #MMp0  
*/ E.*wNah"U  
public void sort(int[] data) { #w^Ot*{!N  
int[] temp=new int[data.length]; RWDPsZC  
mergeSort(data,temp,0,data.length-1); -4J.YF>  
} B/~ubw  
Z]Z&PbP  
private void mergeSort(int[] data,int[] temp,int l,int r){ YD~(l-?"  
int mid=(l+r)/2; X2np.9hie  
if(l==r) return ; %f&Bt,xEo  
mergeSort(data,temp,l,mid); `J{{E,y @  
mergeSort(data,temp,mid+1,r); WdJeh:h  
for(int i=l;i<=r;i++){ .o<9[d"  
temp=data; kMa|V0  
} I.2>d_^<  
int i1=l; ~( rZ)  
int i2=mid+1; -s91/|n  
for(int cur=l;cur<=r;cur++){ rb>2l3g*  
if(i1==mid+1) 7{rRQ~s&g9  
data[cur]=temp[i2++]; PIsXX#`7;  
else if(i2>r) [H`5mY@  
data[cur]=temp[i1++]; 0V2~  
else if(temp[i1] data[cur]=temp[i1++]; ,mD$h?g  
else $nf %<Q  
data[cur]=temp[i2++]; z3fU|*_c  
} D/2;b;-  
} m&_!*3BAG  
J,`I>^G  
} b%j4W)Z  
q6 4bP4K  
改进后的归并排序: ar`}+2Qh0  
w-wJhc|  
package org.rut.util.algorithm.support; ;Q lb].td  
fAT M?  
import org.rut.util.algorithm.SortUtil; o107. s  
DeN$YE#*  
/** *+ O  
* @author treeroot uKT\\1Jrq  
* @since 2006-2-2 d\ Xijy  
* @version 1.0 MG,?,1_ &  
*/ $! UEpQ  
public class ImprovedMergeSort implements SortUtil.Sort { '&y+,2?;Y[  
 8U-<Q>  
private static final int THRESHOLD = 10; 7<F{a"5P  
E{B40E~4  
/* 4e|(= W`  
* (non-Javadoc) n{%[G2.A  
* UO>S2u  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3.04Toq!  
*/ =I)Ex)  
public void sort(int[] data) { 9q<?xO  
int[] temp=new int[data.length]; ur/:aI  
mergeSort(data,temp,0,data.length-1); Z&y9m@  
} @0%^\Qf2  
Ni61o?]Nj  
private void mergeSort(int[] data, int[] temp, int l, int r) { `S/;S<';  
int i, j, k; x):h|/B  
int mid = (l + r) / 2; d ?OsVT; U  
if (l == r) >Co5_sCe  
return; KrD?Z2x  
if ((mid - l) >= THRESHOLD) ^@xn3zJ  
mergeSort(data, temp, l, mid); q6N6QI8/  
else h@(S];.  
insertSort(data, l, mid - l + 1); JVNp= ikK  
if ((r - mid) > THRESHOLD) +C9 l7 q  
mergeSort(data, temp, mid + 1, r); RD'i(szi?  
else %3 $EV}dp  
insertSort(data, mid + 1, r - mid); {rZ )!  
kT4Tb%7KM  
for (i = l; i <= mid; i++) { 1bJrEXHXy  
temp = data; =xsTVT;sj  
} ;*8,PV0b_<  
for (j = 1; j <= r - mid; j++) { o51jw(wO  
temp[r - j + 1] = data[j + mid]; Z"'tJ3Y.~  
} nfjwWDH  
int a = temp[l]; [NIaWI,>  
int b = temp[r]; CN<EgNt1kN  
for (i = l, j = r, k = l; k <= r; k++) { .uu[MzMIu  
if (a < b) { 5KDN8pJN  
data[k] = temp[i++]; S -KHot ?  
a = temp; R8<P}mv  
} else { "~/O>.p  
data[k] = temp[j--]; JQ]A"xTIa*  
b = temp[j]; o@tc   
} \L{V|}"X  
} use` y^c  
} I9;,qd%<T  
/#I~iYPe  
/** rRzc"W}K+  
* @param data 3Ja1|;(2  
* @param l -7:_Dy  
* @param i Dk`(Wgk2  
*/ Sn!5/9Y  
private void insertSort(int[] data, int start, int len) { 8[xl3=  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _Kf8,|+  
} =S:Snk%  
} #J09Eka;J  
} .7|Iausv  
} |Y&&g=7  
 q,v)X  
堆排序: #[.aj2  
M"Q{lR  
package org.rut.util.algorithm.support; r>ca17  
o-_H+p6a  
import org.rut.util.algorithm.SortUtil; 8%Hc%T[RnT  
!{%BfZX<&  
/** q aZQ1<e  
* @author treeroot ;2jH;$HZ  
* @since 2006-2-2 `4kVe= {  
* @version 1.0 OT{cP3;0*o  
*/ ap|$8 G  
public class HeapSort implements SortUtil.Sort{ nBJ'ak   
!b4v}70,  
/* (non-Javadoc) !$L~/<&0g  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {~cM 6W]f  
*/ JsD|igqF-  
public void sort(int[] data) { SA[wF c  
MaxHeap h=new MaxHeap(); {k8R6l1  
h.init(data); ^ R7|x+  
for(int i=0;i h.remove(); ;Qq<5I"y  
System.arraycopy(h.queue,1,data,0,data.length); 5~GH*!h%;  
} o4F(X0  
7X`]}z4g  
private static class MaxHeap{ `b?o%5V2x  
]wm<$+@  
void init(int[] data){ N/6! |F  
this.queue=new int[data.length+1]; )wyC8`&-  
for(int i=0;i queue[++size]=data; 13K|=6si  
fixUp(size); It:,8  
} _ 2 oZhJ  
} 51-@4E2:l:  
(j?ckah%V  
private int size=0; ^aR^M\38  
hAU@}"=G  
private int[] queue; y/>IF|aX  
'@dk3:3t  
public int get() { F_-}GN%  
return queue[1]; )0?u_Z]w9  
} ,xI FF-[0  
]FEDAGu  
public void remove() { T^Ol=QCu  
SortUtil.swap(queue,1,size--); {uN-bl?o  
fixDown(1); Q6;bORN  
} >u+%H vzc  
file://fixdown >S>B tR l  
private void fixDown(int k) { MO@XbPZB  
int j; B$ jX%e{:S  
while ((j = k << 1) <= size) { KAg-M#  
if (j < size %26amp;%26amp; queue[j] j++; |[!7^tU*  
if (queue[k]>queue[j]) file://不用交换 `Wd4d2aLG  
break; apjoIO-<  
SortUtil.swap(queue,j,k); [ji')PCAi;  
k = j; I,W `s  
} bbT1p :RF  
} YI>9C 76L  
private void fixUp(int k) { XhUVDmeUMb  
while (k > 1) { gg/2R?O]  
int j = k >> 1; lvx[C7?  
if (queue[j]>queue[k]) Irui{%T  
break; wZVLpF+7  
SortUtil.swap(queue,j,k); Va[t'%~&zR  
k = j; Y`."=8R~  
} ^l<!:SS  
} T: SqENV  
kD(#LM<9s  
} 2!R+5^Iy  
3&6sQ-}*  
} CEAmb[h  
| {Q}:_/q  
SortUtil: tz5\O}  
m d `=2l  
package org.rut.util.algorithm; 0BH-kr  
-]t>'Q?  
import org.rut.util.algorithm.support.BubbleSort; dQ_hlx!J  
import org.rut.util.algorithm.support.HeapSort; ^1yD&i'q  
import org.rut.util.algorithm.support.ImprovedMergeSort; Y]7 6y>|e  
import org.rut.util.algorithm.support.ImprovedQuickSort; j2%fAs<  
import org.rut.util.algorithm.support.InsertSort; {eVv%sbq  
import org.rut.util.algorithm.support.MergeSort; gVrfZ&XF84  
import org.rut.util.algorithm.support.QuickSort; axOEL:-|Bu  
import org.rut.util.algorithm.support.SelectionSort; E 02Y,C  
import org.rut.util.algorithm.support.ShellSort; C-\3,  
B<ue}t  
/** C80< L5\  
* @author treeroot (\'$$  
* @since 2006-2-2 n5z|@I`S_  
* @version 1.0 [RY Rt/?Q  
*/ |*DkriYY  
public class SortUtil { HYL['B?Wid  
public final static int INSERT = 1; vCXmu_S4^>  
public final static int BUBBLE = 2; $f%om)  
public final static int SELECTION = 3; `F]  
public final static int SHELL = 4;  56MY@  
public final static int QUICK = 5; 3.1%L"r[)  
public final static int IMPROVED_QUICK = 6; v^)B [e!  
public final static int MERGE = 7; _z J /z  
public final static int IMPROVED_MERGE = 8; OL%}C*Zq  
public final static int HEAP = 9; $E.Fgy:G  
0b['{{X(  
public static void sort(int[] data) { @;x*~0GZ  
sort(data, IMPROVED_QUICK); Y`(~eNX^%  
} @biU@[D  
private static String[] name={ CRD=7\0(D+  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" | KY-kRN7  
}; g5RH:]DV  
gVe]?Jva`  
private static Sort[] impl=new Sort[]{ )8oN$2 0  
new InsertSort(), C"$~w3A k  
new BubbleSort(), BzS\p3&  
new SelectionSort(), $ 7W5smW/  
new ShellSort(), !v(^wqna\  
new QuickSort(), cGR)$:  
new ImprovedQuickSort(), "LJV}L  
new MergeSort(), gcB hEw  
new ImprovedMergeSort(), H=\Tse_.  
new HeapSort() ^*.+4iHx  
}; seRf q&  
:U *8S\$  
public static String toString(int algorithm){ dpK -  
return name[algorithm-1]; o"FR% %  
} znSlSQpTv  
5IOGH*'U8  
public static void sort(int[] data, int algorithm) { Qc)i?Z'6  
impl[algorithm-1].sort(data); Kn<+Au_]L  
} c~O Lr  
KeRC8mYp  
public static interface Sort { r>7 +&s*yk  
public void sort(int[] data); u|T]Ne  
} wu><a!3`=o  
^)I}#  
public static void swap(int[] data, int i, int j) { )QRT/, ;c  
int temp = data; X d o\DQn  
data = data[j]; `/'p1?Z"  
data[j] = temp; F\^8k/0  
} K *{RGE  
} $v[mIR  
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