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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。 @W{VT7w  
插入排序: "s:eH"_s  
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package org.rut.util.algorithm.support; dtXA EL\q  
mX4u#$xs:  
import org.rut.util.algorithm.SortUtil; +Wr"c  
/** I U Mt^z  
* @author treeroot ^rHG#^hA  
* @since 2006-2-2 `|{6U"n  
* @version 1.0 {giKC)!  
*/ 3G4N0{i  
public class InsertSort implements SortUtil.Sort{ -uE2h[X|  
??4#)n k  
/* (non-Javadoc) LjE@[@d  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U\crp T`  
*/ 7W{xK'|]  
public void sort(int[] data) { 3 &aBU [  
int temp; /b$0).fj@,  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); V*$(Tt(  
} v#HaZT]u  
} hkK+BmMj\  
} 7wO0d/l_  
S:\a&+og  
} k|O?qE1hP  
pl-2O $  
冒泡排序: U c6]]Bbc  
5tSR2gG#K,  
package org.rut.util.algorithm.support; 7tEK&+H`  
y<53xZi  
import org.rut.util.algorithm.SortUtil; 3!+N} [$iy  
QN GICG-  
/** 5W T^;J9V  
* @author treeroot ` |L l  
* @since 2006-2-2 13:yaRo  
* @version 1.0 \Mi] !b|8  
*/ +PCsp'D d  
public class BubbleSort implements SortUtil.Sort{ Usa  
eHjna\C  
/* (non-Javadoc) 't3@dz_dG  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W7j-siWJ  
*/ -T s8y  
public void sort(int[] data) { &~%( RO  
int temp; n@hf{hA[a  
for(int i=0;i for(int j=data.length-1;j>i;j--){ Fj0a+r,h!  
if(data[j] SortUtil.swap(data,j,j-1); `]+-z +  
} H1FD|Q3  
} r35'U#VMk?  
} ~miRnW*x  
} o(2tRDT\_b  
P ~pC /z  
} &ye,A(4  
wRc=;f  
选择排序: Up(Jw-.  
Rk1B \L|M  
package org.rut.util.algorithm.support; ^m3[mY [a  
#Cwzk{p(  
import org.rut.util.algorithm.SortUtil; <`'^rCWI?  
&#AK#`&)0i  
/** .7BB*!CP  
* @author treeroot [P,/J$v^~  
* @since 2006-2-2 %LL*V|  
* @version 1.0 ylV.ZoY6  
*/ O_f+#K)  
public class SelectionSort implements SortUtil.Sort { #4?(A[]>H  
ndsu}:my  
/* |5ifgSZ  
* (non-Javadoc) f;Iaf#V_  
* H-*"%SJ  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Hs\q!5Q  
*/ M"E ]r=1  
public void sort(int[] data) { DeMF<)#  
int temp; <])w@QOA#  
for (int i = 0; i < data.length; i++) { f/FK>oUh  
int lowIndex = i; w&M)ws;$  
for (int j = data.length - 1; j > i; j--) { 1j_x51p  
if (data[j] < data[lowIndex]) { rm-6Az V  
lowIndex = j; l&]Wyaz@n  
} ,P?R 3  
} ?89ZnH2/  
SortUtil.swap(data,i,lowIndex); vYYLn9}5  
} :6,qp?/  
} A? =(q  
mXX9Aa>  
} $U uSrX&  
]^='aQ  
Shell排序: *kI1NchF  
*ybwl Lg  
package org.rut.util.algorithm.support; X j'7nj  
NwK(<dzG  
import org.rut.util.algorithm.SortUtil; )$# Ku2X  
G(4*e! aZ0  
/** WIe2j  
* @author treeroot SqiLp!Y`  
* @since 2006-2-2 /1Xji 0LK  
* @version 1.0 `kx+Kc  
*/ )u. ut8![T  
public class ShellSort implements SortUtil.Sort{ [7QIpt+FSo  
M5SAlj  
/* (non-Javadoc) ~MvLrg"i  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _` %z  
*/ hb6UyN  
public void sort(int[] data) { rKP;T"?;  
for(int i=data.length/2;i>2;i/=2){ Vd8BQB,Q  
for(int j=0;j insertSort(data,j,i); Hkc:B/6  
} 9$9Pv%F:j  
} nUAs:Q  
insertSort(data,0,1); c'9-SY1'~  
} HMUn+kk+  
.js@F/H p  
/** =5JTVF  
* @param data Jy,Dcl  
* @param j =4;GIiF@  
* @param i ?0UzmJV?8  
*/ o'W[v0> L-  
private void insertSort(int[] data, int start, int inc) { x?ajTzMv  
int temp; ty8\@l  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); t/6t{*-w  
} =uZOpeviQ  
} 9w-V +Nf  
} ;2m<#~@0  
0A~zu K  
} . Q#X'j  
</K"\EU  
快速排序: LnN6{z{M  
hL\gI(B  
package org.rut.util.algorithm.support; HiBw==vlV  
KcGM=z?:  
import org.rut.util.algorithm.SortUtil; +["t@Q4IQ  
&{s`=IeN  
/** #&Zb8HAj  
* @author treeroot Y)x(+#  
* @since 2006-2-2 6J|Ee1Ez  
* @version 1.0 # j_<iy  
*/ P=)&]Pz  
public class QuickSort implements SortUtil.Sort{ ^#H%LLt  
1U"Fk3  
/* (non-Javadoc) pGZ I697  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t~xp&LQiY  
*/ [:HT=LX3  
public void sort(int[] data) { ]-o0HY2  
quickSort(data,0,data.length-1); GEg8\  
} ZMSP8(V  
private void quickSort(int[] data,int i,int j){ 0]dL;~0y.  
int pivotIndex=(i+j)/2; `Gl@?9,i  
file://swap RH,1U3?  
SortUtil.swap(data,pivotIndex,j); p,y(Fc~]g'  
R<}Yf[TQ  
int k=partition(data,i-1,j,data[j]); |%F[.9Dp  
SortUtil.swap(data,k,j); U]!D=+  
if((k-i)>1) quickSort(data,i,k-1); t83n`LC  
if((j-k)>1) quickSort(data,k+1,j); 8:j8>K*6  
u S$:J:Drx  
} $-dz1}  
/** 2 {lo  
* @param data `+~@VZ3m  
* @param i C<!%VHs  
* @param j V 0<>Xo%  
* @return 0Hz*L,Bh4  
*/ yqpb_h9  
private int partition(int[] data, int l, int r,int pivot) { EJ*  
do{ x,Im%!h  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); M(,npW  
SortUtil.swap(data,l,r); #ii,GN~N  
} JW!SrM xF  
while(l SortUtil.swap(data,l,r); t]Ey~-Rx  
return l; p]d3F^*i  
} DrD68$,QN  
^Zh YW  
} * \@u,[,  
r)jj]$0  
改进后的快速排序: _rQM[{Bkg  
u!([m; x|  
package org.rut.util.algorithm.support; su~_l[6  
L#'B-G4&y  
import org.rut.util.algorithm.SortUtil; ^O cM)Z6h  
' LT6%<|  
/** UR~9*`Z ,  
* @author treeroot lGa'Y  
* @since 2006-2-2 ?]S!-6:  
* @version 1.0 kLKd O0  
*/ ni#!Gxw  
public class ImprovedQuickSort implements SortUtil.Sort { z}'*zB>  
ER:)Fk>_  
private static int MAX_STACK_SIZE=4096; kcd~`+C  
private static int THRESHOLD=10; pZR KM<k  
/* (non-Javadoc) $ctY#:;pV{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VWoxi$3v  
*/ I|=$.i  
public void sort(int[] data) { t:m2[U_}  
int[] stack=new int[MAX_STACK_SIZE]; Wq!n8O1  
Lh~Ym<CeN  
int top=-1; ~ #Gu:  
int pivot; xF*C0B;QL  
int pivotIndex,l,r; $=8?@My<  
lZTD>$  
stack[++top]=0; wL]7d3t  
stack[++top]=data.length-1; n<;T BK  
sF?N vp  
while(top>0){ .7-Yu1{2  
int j=stack[top--]; f Q.ea#xh^  
int i=stack[top--]; pIh%5Z U  
uy~KJn?Tu  
pivotIndex=(i+j)/2; [@@Ovv  
pivot=data[pivotIndex]; *yGOm i  
Cc:m~e6r  
SortUtil.swap(data,pivotIndex,j); n237%LH[  
CErkmod{}e  
file://partition iw|6w,-)C  
l=i-1; pQaP9Y{OK  
r=j; i)V-q9\  
do{ PgZ~of&  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); U!sv6=(y@  
SortUtil.swap(data,l,r); 1]r+$L3  
} irNGURLm  
while(l SortUtil.swap(data,l,r); s}Q%]W  
SortUtil.swap(data,l,j); jP6;~[rl  
.^^YS$%%7  
if((l-i)>THRESHOLD){ F{ cKCqI?  
stack[++top]=i; %Uk]e5Hu  
stack[++top]=l-1; Z7&Bn  
} zmI?p4,  
if((j-l)>THRESHOLD){ XfF Z;ul  
stack[++top]=l+1; `, ?T;JRc  
stack[++top]=j; !*wK4UcX"  
} iG*3S)  
%J\1W"I?  
} ^+:_S9qst  
file://new InsertSort().sort(data); <o5+*X  
insertSort(data); q2}<n'o+  
} Lxm1.TOJ  
/** K#g)t/SZ  
* @param data JcxhI]E  
*/ <,,U>0?3  
private void insertSort(int[] data) { .IYE+XzV  
int temp; S2)rkX$  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ,,r%Y&:`6  
} -b-Pvw4  
} )2mi6[qs0l  
} v7VJVLH,I7  
#;'1aT  
} /ve8);cH\  
H"8+[.xBh  
归并排序: kStWsc$;+T  
B[F,D  
package org.rut.util.algorithm.support; x,"'\=|s*  
vB, X)  
import org.rut.util.algorithm.SortUtil;  hM2^[8  
z;UkK  
/** %k#Q) zWJ  
* @author treeroot dX0A(6  
* @since 2006-2-2 G0$ 1"9u\w  
* @version 1.0 Gnmj-'x  
*/ 6C>x,kU  
public class MergeSort implements SortUtil.Sort{ 9="i'nYp  
a3]'%kKp  
/* (non-Javadoc) 9PEjV$0E2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) krm&.J  
*/ Y;>0)eP  
public void sort(int[] data) { KLlo^1.<  
int[] temp=new int[data.length]; _$"qC[.  
mergeSort(data,temp,0,data.length-1); 8%Zl;;W  
} pDD0 QO  
[vpZ3;  
private void mergeSort(int[] data,int[] temp,int l,int r){ zw^jIg$  
int mid=(l+r)/2; ^1U2&S  
if(l==r) return ; V 0R;q  
mergeSort(data,temp,l,mid); r7sPFM  
mergeSort(data,temp,mid+1,r); Dm6WSp1|b  
for(int i=l;i<=r;i++){ Bsw5A7,-  
temp=data; 94"R&|  
} pU)wxv[~  
int i1=l; ]>K%,}PS  
int i2=mid+1; 7,ODh-?ez  
for(int cur=l;cur<=r;cur++){ ,dKcxp~[  
if(i1==mid+1) 5nzk Zw  
data[cur]=temp[i2++]; )` S,vF~  
else if(i2>r) HS| &["  
data[cur]=temp[i1++]; 68R[Lc9q5  
else if(temp[i1] data[cur]=temp[i1++]; .Vq-<c%  
else 0Z#&!xTb  
data[cur]=temp[i2++]; 3/o-\wWO  
} sj003jeko  
} rixNz@p'%  
D %~s  
} >1xlP/4jx  
he&*N*of:  
改进后的归并排序: 9 8bmia&H  
v#:#w.]-Y  
package org.rut.util.algorithm.support; YS k,kU  
<T:u&Ic  
import org.rut.util.algorithm.SortUtil; OUn,URI  
R@t?!`f!+  
/** UO8#8  
* @author treeroot Z2`(UbG}  
* @since 2006-2-2 e4Ol:V  
* @version 1.0 u*Eb4  
*/ /r Zj=  
public class ImprovedMergeSort implements SortUtil.Sort { "YHqls}c  
_OP75kv  
private static final int THRESHOLD = 10; h9LA&!  
%v:9_nwO)  
/* | "DQ^)3Pi  
* (non-Javadoc) Q u2W  
* 21M@z(q*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /og2+!  
*/ l,HMm|oU  
public void sort(int[] data) { Ra[{K@  
int[] temp=new int[data.length]; L~SM#?z:ue  
mergeSort(data,temp,0,data.length-1); jR\&2;T  
} OOs Y{8xM  
#/!a=0  
private void mergeSort(int[] data, int[] temp, int l, int r) { OT{wqNI  
int i, j, k; ;OTD1=  
int mid = (l + r) / 2; ZffK];D  
if (l == r) 4&~1|B{Z  
return; Zz= +?L  
if ((mid - l) >= THRESHOLD) v! uD]}  
mergeSort(data, temp, l, mid); 3,e^; {w  
else Hn0 ,LH$/  
insertSort(data, l, mid - l + 1); y^=\w?d  
if ((r - mid) > THRESHOLD) &V$_u#<  
mergeSort(data, temp, mid + 1, r); BdB/`X*  
else zn&NLsA  
insertSort(data, mid + 1, r - mid); qYZX, x  
BftW<1,U^  
for (i = l; i <= mid; i++) { i}N'W V`!  
temp = data; ([iMOE[D3  
} `Q^G k{9P  
for (j = 1; j <= r - mid; j++) { >%x7-->IB  
temp[r - j + 1] = data[j + mid]; ] 7_ f'M1F  
} C4&yC81Gm  
int a = temp[l]; 9a"[-B:  
int b = temp[r]; `] ;*k2  
for (i = l, j = r, k = l; k <= r; k++) { N^xnx<  
if (a < b) { ])egke\!  
data[k] = temp[i++]; o X )r4H?  
a = temp; ?@6N EfQf  
} else { 5X4; (Qj  
data[k] = temp[j--]; L|EvI.f  
b = temp[j]; nJY#d;  
} 7"w r8  
} y|Tb&XPD  
} :w:hqe|_  
w4<1*u@${  
/** %fnL  
* @param data 6%~ Z^>`N  
* @param l q3TAWNzI0  
* @param i 3qE2mYK  
*/ eaCv8zdX  
private void insertSort(int[] data, int start, int len) { 1|l'oTAA  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y` Oz\W  
} 7RM$%'n \  
} lX/s Q  
} uV`r_P  
} _@;t^j+l  
K[PH#dF5,x  
堆排序: UUc{1"z{  
R$k4}p  
package org.rut.util.algorithm.support; _Je<_pl!D  
zMxHJNQ\D  
import org.rut.util.algorithm.SortUtil; wZ6LiYiHl  
|jH- bm  
/** kL\ FY  
* @author treeroot S*VG;m #  
* @since 2006-2-2 ?%dsY\  
* @version 1.0 ET;YAa*  
*/ *cz nokq6  
public class HeapSort implements SortUtil.Sort{ +KgLe>-}  
FY+0r67]  
/* (non-Javadoc) w4P?2-kB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .w/w] Eq  
*/ Q^>"AhOiU  
public void sort(int[] data) { / CEnyE/  
MaxHeap h=new MaxHeap(); 8+5# FC7  
h.init(data); 9`VgD<?v  
for(int i=0;i h.remove(); fT.18{'>  
System.arraycopy(h.queue,1,data,0,data.length); pyYm<dn  
} ^0p y  
N}Q%y(O^  
private static class MaxHeap{ 0Am&:kX't  
uP2e/a  
void init(int[] data){ dU<\ FW_  
this.queue=new int[data.length+1]; =+;l>mn?O  
for(int i=0;i queue[++size]=data; 8Y?zxmwn]  
fixUp(size); N^z4I,GV(  
} }5 ^2g!M  
} gpDH_!K  
y:u7*%"  
private int size=0; 4v9jGwnzt  
kk#%x#L[  
private int[] queue; R?Zv  
EK`}?>'  
public int get() { KK$t3e)  
return queue[1]; ea[vzD]  
} -d5b,leC^  
p)v|t/7  
public void remove() { pW$ZcnU  
SortUtil.swap(queue,1,size--); Ey96XJV  
fixDown(1); F|pM$Kd`  
} 2*;qr|h,  
file://fixdown $2uk;&"?A=  
private void fixDown(int k) { 7niZ`doBA  
int j; >L[n4x\  
while ((j = k << 1) <= size) { 3}R}|Ha J#  
if (j < size %26amp;%26amp; queue[j] j++; 36"-cGNr{  
if (queue[k]>queue[j]) file://不用交换 S"hA@j  
break; )tYu3*'  
SortUtil.swap(queue,j,k); " E+V >V+  
k = j; Cge@A'2  
} yTJ Eo\g/@  
} G#yv$LY#  
private void fixUp(int k) { !jlLF:v|1A  
while (k > 1) { %PA#x36  
int j = k >> 1; c"D%c(:4|  
if (queue[j]>queue[k]) ? 1Os%9D*  
break; DS;,@$N_N  
SortUtil.swap(queue,j,k); X<G"Ga L  
k = j; `|kW%L4  
} ?-M?{De   
} )1?#q[x  
ls[0X82F  
} {<ms;Oi'  
p1t qwV  
} IE*eDj  
xs#g  
SortUtil: >,%or cN  
? nx3# <  
package org.rut.util.algorithm; K(jo[S  
k7,   
import org.rut.util.algorithm.support.BubbleSort; U<<@(d%T  
import org.rut.util.algorithm.support.HeapSort; ozaM!ee\z  
import org.rut.util.algorithm.support.ImprovedMergeSort; PU8>.9x  
import org.rut.util.algorithm.support.ImprovedQuickSort; "06t"u<%  
import org.rut.util.algorithm.support.InsertSort; I;xSd.-  
import org.rut.util.algorithm.support.MergeSort; {:=sCY!  
import org.rut.util.algorithm.support.QuickSort; [}>!$::Y  
import org.rut.util.algorithm.support.SelectionSort; \dAs<${(  
import org.rut.util.algorithm.support.ShellSort; suOWmqLs  
,bTpD!  
/** _43'W{%  
* @author treeroot lV%oIf[OB  
* @since 2006-2-2 ,J;Cb}  
* @version 1.0 F/%M`?m"ie  
*/ B^;"<2b*  
public class SortUtil { +/+>:  
public final static int INSERT = 1; P;8nC:zL  
public final static int BUBBLE = 2; e|-&h `[  
public final static int SELECTION = 3; KBC?SxJSJc  
public final static int SHELL = 4; trx y3k;  
public final static int QUICK = 5; ?Vre" 6U  
public final static int IMPROVED_QUICK = 6; [D%(Y ~2  
public final static int MERGE = 7; ^(F@#zN}  
public final static int IMPROVED_MERGE = 8; 76oJCNY  
public final static int HEAP = 9; s5s'[<  
-v %n@8p  
public static void sort(int[] data) { uH{oJSrK  
sort(data, IMPROVED_QUICK); %eOO8^N  
} gOy;6\/  
private static String[] name={ l+nT$IPF  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wn-1fz <d  
}; *Jwx,wF}4  
ldFR%v> 9  
private static Sort[] impl=new Sort[]{ zgNzdO/B  
new InsertSort(), J7;8 S  
new BubbleSort(), <uG6!P  
new SelectionSort(), 5Z@0XI  
new ShellSort(), )L/0X40<.  
new QuickSort(), ;kD UQw  
new ImprovedQuickSort(), \>$3'i=mQ  
new MergeSort(), 6?(yMSKa  
new ImprovedMergeSort(), 3N[Rrxe2  
new HeapSort() Ce/l[v  
}; 8bJj3vr  
% * k`z#b  
public static String toString(int algorithm){ H\fsyxM7  
return name[algorithm-1]; (b;Kl1Ql]  
} zC,c9b  
X $2f)3  
public static void sort(int[] data, int algorithm) { zJ6""38Pr  
impl[algorithm-1].sort(data); OwCbv j0 #  
} oGRd ;hsF  
6gs0Vm  
public static interface Sort { 6Ki!j<  
public void sort(int[] data); +)hxYLk&I  
} uf^HDr r<L  
`r'$l<(4WV  
public static void swap(int[] data, int i, int j) { =`ZRPA!aY  
int temp = data; i!{A7mo  
data = data[j]; \Up~ "q>Kb  
data[j] = temp; Xf#+^cQ  
} NDUH10Y:[  
} 9.%t9RM^  
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