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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。 2$FH+wuW  
插入排序: >Xw0i\G  
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package org.rut.util.algorithm.support; q@vqhE4  
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import org.rut.util.algorithm.SortUtil; QAX3*%h  
/** i7%`}t  
* @author treeroot 1h?QEZ,6a  
* @since 2006-2-2 fw)Q1"|  
* @version 1.0 4|;Ys-Q  
*/ 1H \  
public class InsertSort implements SortUtil.Sort{ 5:(/k\9+yv  
>35W{ d  
/* (non-Javadoc) <."KejXg-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U< <XeSp  
*/ ZP '0=  
public void sort(int[] data) { ]Hg6Mz>Mj  
int temp; U'@ ![Fp  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); B_ bZa  
} IYv.~IQO  
} 3%)@c P:?  
} J T6}m  
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} Vllxv6/_  
Yz#E0aTTA  
冒泡排序: ik1asj1  
!6,rN_a@Y  
package org.rut.util.algorithm.support; wV-9T*QrM  
9 !$&1|,*  
import org.rut.util.algorithm.SortUtil; Q" r y@ (I  
j8c5_&  
/** \,'4eV  
* @author treeroot (__$YQ-  
* @since 2006-2-2 g'cVsO)S  
* @version 1.0 KW$.Yy  
*/ Q]e]\J  
public class BubbleSort implements SortUtil.Sort{ ld3H"p rR  
kU,g=+ 2J  
/* (non-Javadoc) uU%Z%O  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L7R!,  
*/ #RbdQH !  
public void sort(int[] data) { l(Dr@LB~  
int temp; N;,zPWa  
for(int i=0;i for(int j=data.length-1;j>i;j--){ EIfqRRTA  
if(data[j] SortUtil.swap(data,j,j-1); }zxf~4 1  
} -v-kFzu  
} #!E`%' s]  
} P j,H]  
} RN|Bk  
mln4Vl(l2M  
} !#~KSO}zW2  
 Na@;F{  
选择排序:  JZ+6)R  
L>mM6$l  
package org.rut.util.algorithm.support; _iCrQJ0"T  
 v\CBw"  
import org.rut.util.algorithm.SortUtil; %hN(79:g  
FPkk\[EU  
/** $${3I4  
* @author treeroot .c&&@>m@.  
* @since 2006-2-2 v#d(Kj  
* @version 1.0 e$_gOwB  
*/ S>r}3,]S  
public class SelectionSort implements SortUtil.Sort { lNf);!}SM  
jSM`bE+"  
/* q,<l3rIn  
* (non-Javadoc) "" >Yw/'  
* -G@uB_Cs  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ms;zC/  
*/ >N2kWSa  
public void sort(int[] data) { e$P^},0/  
int temp; 3 !8#wn  
for (int i = 0; i < data.length; i++) { 1LSJy*yY  
int lowIndex = i;  maHz3:  
for (int j = data.length - 1; j > i; j--) { qo 7<g*kf~  
if (data[j] < data[lowIndex]) { )B +o F7  
lowIndex = j; X Db%-  
} R+0gn/a[G  
} fa,:d8  
SortUtil.swap(data,i,lowIndex); ,/GFD[SQ  
} Te~jYkCd  
} rir,|y,  
DJ7ak>"R  
} ;di .U,  
wJJ|]^0.  
Shell排序: #<B?+gzFM{  
+X+R8  
package org.rut.util.algorithm.support; E;4B!"Q8  
u/wX7s   
import org.rut.util.algorithm.SortUtil; IKnf  
^H2TSaJ;  
/** "PElQBLP:  
* @author treeroot Z:,\FB_U  
* @since 2006-2-2 K3h];F! ^  
* @version 1.0 9z{}DBA  
*/ :|S[i('  
public class ShellSort implements SortUtil.Sort{ D4(73  
17c`c.yP  
/* (non-Javadoc) %%n&z6w-  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^`dMjeF  
*/ `L <sZ;Cj  
public void sort(int[] data) { J Q*~le*  
for(int i=data.length/2;i>2;i/=2){ p=eSJ*  
for(int j=0;j insertSort(data,j,i); NX(IX6^y  
} \24'iYtqW  
} ]e5aHpgR=  
insertSort(data,0,1); >7X5/z  
} ? eI)m  
SJO*g&duQ  
/** :.l\lj0Yf  
* @param data J0e^v  
* @param j oNl-! W   
* @param i Sh-B!  
*/ P| ?nx"c  
private void insertSort(int[] data, int start, int inc) { &WAU[{4W  
int temp; oa7 N6  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ? N]bFW"t|  
} bT9:9LP  
} QjJlVlp  
} X2| Z!  
#z.\pd  
} rk ,64(  
1 rbc}e  
快速排序: 1yU!rEH  
I 6<LKI/  
package org.rut.util.algorithm.support; n31nORx50  
l,A\]QDvl  
import org.rut.util.algorithm.SortUtil; d@cyQFX  
{/?{UbU  
/** Cx(HsJ! ,  
* @author treeroot 6OPNP0@r  
* @since 2006-2-2 Sqmjf@o$>  
* @version 1.0 e 1bV&  
*/ 4T&Jlu?:  
public class QuickSort implements SortUtil.Sort{ ^( C,LVP<  
rvnm*e,  
/* (non-Javadoc) +&_n[;   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *x 2u  
*/ R5uz<  
public void sort(int[] data) { Xe/7rhov  
quickSort(data,0,data.length-1); Mwj7*pxUh  
} .&^M Z8  
private void quickSort(int[] data,int i,int j){ l>HB0o  
int pivotIndex=(i+j)/2; zn*i  
file://swap MD>E0p)  
SortUtil.swap(data,pivotIndex,j); nu|odP  
.J5or  
int k=partition(data,i-1,j,data[j]); X)9|ZF2`  
SortUtil.swap(data,k,j); `wLmGv+V  
if((k-i)>1) quickSort(data,i,k-1); kwt;pxp i  
if((j-k)>1) quickSort(data,k+1,j); >6;RTN/P2  
!$o9:[B  
} 8Waic&lX~  
/** aO\@5i_r  
* @param data "rQ?2?  
* @param i ?* dfIc  
* @param j *;.:UR[i  
* @return ju"j?2+F  
*/ etP`q:6^c  
private int partition(int[] data, int l, int r,int pivot) { d k|X&)xTJ  
do{ Y:'c<k  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); VK4"  
SortUtil.swap(data,l,r); qRZLv7X*j  
} -f(< 2i  
while(l SortUtil.swap(data,l,r); @|~D?&<\  
return l; dFpP_U  
} 'BEM:1)  
)#cGeP A  
} ou&7v<)x4  
sE(mK<{pk  
改进后的快速排序: 3Q+THg3~?  
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package org.rut.util.algorithm.support; @L^30>?l  
!r0 z3^*N  
import org.rut.util.algorithm.SortUtil; pM@0>DVi  
VoUAFEcs  
/** Wuji'sxTs  
* @author treeroot JvLa@E)  
* @since 2006-2-2 r\{; ~V  
* @version 1.0 en gh3TZC  
*/ 4T#Z[B[  
public class ImprovedQuickSort implements SortUtil.Sort { #1f8A5<  
)'?@raB!  
private static int MAX_STACK_SIZE=4096; RD p(Ci  
private static int THRESHOLD=10; i+.bR.WO  
/* (non-Javadoc) qUp DmH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1hgmlY`  
*/ [k6 5i  
public void sort(int[] data) { X?.LA7)CK  
int[] stack=new int[MAX_STACK_SIZE]; !7[Rhk7bW  
;tLu  
int top=-1; rB%acTCz=[  
int pivot; .:s**UiDR  
int pivotIndex,l,r; s"]LQM1|  
uU00ZPS*G[  
stack[++top]=0; =zW.~(c{  
stack[++top]=data.length-1; BI6o@d;=4  
+Gvf5+ 5VR  
while(top>0){ hu qQ0  
int j=stack[top--]; M0%):P?x  
int i=stack[top--]; xlaBOKa%  
~A=Z/46*Z  
pivotIndex=(i+j)/2; dPRGL hWF  
pivot=data[pivotIndex]; PDssEb7  
-xf=dzm)  
SortUtil.swap(data,pivotIndex,j); G P/3r[MH  
O-vvFl#4  
file://partition '4qi^$|\  
l=i-1; t=ry\h{Pc  
r=j; aOj5b>>  
do{ 5fBW#6N/  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); EkqsE$52  
SortUtil.swap(data,l,r); =X2EF  
} %+9Mr ami  
while(l SortUtil.swap(data,l,r); .HG0%Vp  
SortUtil.swap(data,l,j);  g=:C/>g  
l>M&S^/s j  
if((l-i)>THRESHOLD){ /Et:',D  
stack[++top]=i; 2,<!l(X  
stack[++top]=l-1; A_@#V)D2  
} (byFr9z  
if((j-l)>THRESHOLD){ \^3\_T&6  
stack[++top]=l+1; z6R<*$4  
stack[++top]=j; R28h%KN  
} kf$0}T`  
jfHVXu^M  
} mi3yiR  
file://new InsertSort().sort(data); fN>o465I6  
insertSort(data); avk0pY(n  
} [N925?--S  
/** K$\]\qG6  
* @param data 3%xj-7z W  
*/ ?+b )=Z  
private void insertSort(int[] data) { *A O/$K@Ma  
int temp; 5o2;26c  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 1< ;<?  
} vh+Ih Gi  
} UMw1&"0:  
} O6;7'  
}S$]MY,*  
} rRL:]%POT  
y%\kgWV  
归并排序: h{kAsd8 G  
N/mTG2'<  
package org.rut.util.algorithm.support; Rg,pC.7;  
2|Hq[c=~  
import org.rut.util.algorithm.SortUtil; FU~ Ip  
PSNrY e  
/** =ex71qj)  
* @author treeroot {(A Ys*5  
* @since 2006-2-2 zN {'@B  
* @version 1.0 uJm9h(xq  
*/ x(&o=Pu  
public class MergeSort implements SortUtil.Sort{ y'pAhdF  
INE8@}e  
/* (non-Javadoc) CbA!  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gyJ$ Jp  
*/ 6fQNF22E  
public void sort(int[] data) { &hEtVkK  
int[] temp=new int[data.length]; o4,W!^ n2  
mergeSort(data,temp,0,data.length-1); m49GCo k+  
} kb ]PW Oz  
[ K;3Qf)  
private void mergeSort(int[] data,int[] temp,int l,int r){ 2}[)y\`t3  
int mid=(l+r)/2; ]i)m   
if(l==r) return ; t0d1? ?G  
mergeSort(data,temp,l,mid); lphQZ{8  
mergeSort(data,temp,mid+1,r); |[;9$Vn  
for(int i=l;i<=r;i++){ V.6h6B!vB  
temp=data; VlXUrJ9&  
} ds,NNN<HW  
int i1=l; VChNDHiH  
int i2=mid+1; /\hybx'  
for(int cur=l;cur<=r;cur++){ Ro`9Ibqr  
if(i1==mid+1) o nt8q8  
data[cur]=temp[i2++]; /\V-1 7-  
else if(i2>r) u;GS[E4  
data[cur]=temp[i1++]; x4Mq{MrWp  
else if(temp[i1] data[cur]=temp[i1++]; +1~Y2   
else *Fb]lM7D  
data[cur]=temp[i2++]; Ds? @ LE|  
} Jw)Uk< \  
} Tz[ck 'k  
]*|+06  
} I{U7BZy  
_8Cw_  
改进后的归并排序: )-%3;e<w  
nj$TdwZbK  
package org.rut.util.algorithm.support; U1}-]^\  
mZQW>A]iE  
import org.rut.util.algorithm.SortUtil; 7v3'JG1r-  
>7i&(6L  
/** SEa'>UG  
* @author treeroot Ybo:2e  
* @since 2006-2-2 Z:9xf:g *  
* @version 1.0 >zFk}/  
*/ u0 myB/`  
public class ImprovedMergeSort implements SortUtil.Sort { .\XFhOsa  
/.P9n9  
private static final int THRESHOLD = 10; U{/d dCf7  
vqO d`_)  
/* @lpo$lN0R  
* (non-Javadoc) '/8{Mx+  
* C+o1.#]JM  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0z&]imU  
*/ hOZ:r =%  
public void sort(int[] data) { }z%fQbw  
int[] temp=new int[data.length]; * -uA\  
mergeSort(data,temp,0,data.length-1); UMtnb:ek  
} :%G_<VAo!  
{txW>rZX  
private void mergeSort(int[] data, int[] temp, int l, int r) { 9o%k [n  
int i, j, k; y5/frJ  
int mid = (l + r) / 2; slUnB6@Q  
if (l == r) 5j'7V1:2  
return; ZHu"& &  
if ((mid - l) >= THRESHOLD) 4eVQO%&2  
mergeSort(data, temp, l, mid); 3yGo{uW  
else &/dYJv$[9  
insertSort(data, l, mid - l + 1); U{1%ldOJ%  
if ((r - mid) > THRESHOLD) Me;XG?`  
mergeSort(data, temp, mid + 1, r); Q1kZ+b&  
else 9w3KAca  
insertSort(data, mid + 1, r - mid); |D*a"*1+A  
-gn!8G1  
for (i = l; i <= mid; i++) { |L9p.q  
temp = data; \ -n&z;`  
} ]{Y7mpdB  
for (j = 1; j <= r - mid; j++) { :m]KVcF.  
temp[r - j + 1] = data[j + mid]; oYx4+xH/  
} /1@py~ZX  
int a = temp[l]; i.Rxx, *?  
int b = temp[r]; +{~ cX] |  
for (i = l, j = r, k = l; k <= r; k++) { *@;bWUJ  
if (a < b) { _tlr8vL  
data[k] = temp[i++]; hTc :'vq  
a = temp; Xsk/U++  
} else { q$7w?(Lk  
data[k] = temp[j--]; xe"A;6H  
b = temp[j]; &s#OiF8  
} P*|qbY  
} }|UTwjquBD  
} rS>@>8k2,  
&?@gCVNO,  
/** /9b+I/xY"  
* @param data C>A} e6o  
* @param l x)R1aq  
* @param i B#]:1:Qn  
*/ 0VnRtLnqI  
private void insertSort(int[] data, int start, int len) { t/lQSUip  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \E {'|  
} lLur.f  
} `#*`hH8  
} }wB!Bx2  
} &E]<KbVx  
s .@Szq  
堆排序: _RNP_$a  
ZU$QwI8  
package org.rut.util.algorithm.support; FM=XoMP q  
E]Q d5l  
import org.rut.util.algorithm.SortUtil; 9=J 3T66U  
:*M2@  
/** W K(GR\@  
* @author treeroot y*Gq VA[  
* @since 2006-2-2 s"`Oj5  
* @version 1.0 \WqC^Di  
*/ z57q |  
public class HeapSort implements SortUtil.Sort{ DaBy<pGb?  
e= XC$Jv  
/* (non-Javadoc) 8Ow#W5_3|  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y1h3Ch>Y  
*/ 2K^xN]]rG  
public void sort(int[] data) { 4Wu(Tps  
MaxHeap h=new MaxHeap(); KBoW(OP4'  
h.init(data); \=[38?QOY  
for(int i=0;i h.remove(); de9e7.(2  
System.arraycopy(h.queue,1,data,0,data.length); .E 9$j<SP-  
} tb>Q#QB&u  
9e7):ZupO  
private static class MaxHeap{ pxI[/vS N  
NxzAlu  
void init(int[] data){ RT2&^9-  
this.queue=new int[data.length+1]; cJ>^@pd{  
for(int i=0;i queue[++size]=data; j*FpQiBoT  
fixUp(size); rM4Ri}bS  
} v+i==vxg  
} ]M 2n%9  
)afH:  
private int size=0; *&5./WEOH  
uF{l`|b'  
private int[] queue; mqBX1D`e2  
a *bc#!e  
public int get() { BwYR"  
return queue[1]; {qm5H7sL  
} Bnz}:te}  
uG/b Cb+V  
public void remove() { ?'>[n m  
SortUtil.swap(queue,1,size--); ,!^g8zO  
fixDown(1); .B! L+M< [  
} PKev)M;C+  
file://fixdown %+dRjG~TB  
private void fixDown(int k) { =T$2Qo8  
int j; rm<`H(cT  
while ((j = k << 1) <= size) { )LL.fPic  
if (j < size %26amp;%26amp; queue[j] j++; 2{G7ignv  
if (queue[k]>queue[j]) file://不用交换 q#0yu"<  
break; G&yF9s)Lvs  
SortUtil.swap(queue,j,k); BO 3z$c1yU  
k = j; ZV!*ZpTe~  
} (OG>=h8?  
} i;J*9B_U  
private void fixUp(int k) { `J}FSUn\  
while (k > 1) { [5]* Be  
int j = k >> 1; ^.[+)0I  
if (queue[j]>queue[k]) WWA!_  
break; 1! R:}r3t  
SortUtil.swap(queue,j,k); .Zx7+`i  
k = j; fM<g++X  
} } d7o-  
} U6M&7 l8  
Bn Nu/02.=  
} mTa^At"  
)1&,khd/u  
} "'c =(P  
}& 01=nY  
SortUtil: ,oj)`?Vh  
1gH>B5`  
package org.rut.util.algorithm; +B OuU#  
lW@i,1  
import org.rut.util.algorithm.support.BubbleSort; \'x?VVw  
import org.rut.util.algorithm.support.HeapSort; i^/D_L.  
import org.rut.util.algorithm.support.ImprovedMergeSort; q%FXox~b  
import org.rut.util.algorithm.support.ImprovedQuickSort; G]I^zd&P  
import org.rut.util.algorithm.support.InsertSort; pB79#4  
import org.rut.util.algorithm.support.MergeSort; YfH+kDT  
import org.rut.util.algorithm.support.QuickSort; -KCQ!0\F  
import org.rut.util.algorithm.support.SelectionSort; E2|c;{ c  
import org.rut.util.algorithm.support.ShellSort; EJO6k1  
o(5 ( ]bJ  
/** S]DYEL$  
* @author treeroot =A^VzIj(  
* @since 2006-2-2 $@L}/MO  
* @version 1.0 dRLvej,  
*/ @RS|}M^4  
public class SortUtil { +tFl  
public final static int INSERT = 1; &M+fb4:_  
public final static int BUBBLE = 2; ,m.IhnCV\  
public final static int SELECTION = 3; T8J[B( )L  
public final static int SHELL = 4; J+8T Ie  
public final static int QUICK = 5; qXQ7Jg9  
public final static int IMPROVED_QUICK = 6; 9@z"~H  
public final static int MERGE = 7; U*Pi%J  
public final static int IMPROVED_MERGE = 8; #3Jn_Y%P.  
public final static int HEAP = 9; MQGR-WV=5  
54, (;  
public static void sort(int[] data) { ( cqVCys  
sort(data, IMPROVED_QUICK); {KalVZX2R  
} )3~):+  
private static String[] name={ p'IF2e&z  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fRd^@@,[  
}; OO+QH 2j  
@I|gA  
private static Sort[] impl=new Sort[]{ qU,u(El  
new InsertSort(), #Y9~ Xp^.  
new BubbleSort(), {QTnVS't 0  
new SelectionSort(), V3$Yr"rZ;  
new ShellSort(), `>cBR,)r  
new QuickSort(), Ox1#}7`0>  
new ImprovedQuickSort(), [Dq!t1  
new MergeSort(), m`Ver:{  
new ImprovedMergeSort(), ULkhTB  
new HeapSort() 7B,a xkr  
}; pT`oC&  
+1%7*2q,  
public static String toString(int algorithm){ G\1\L*+0  
return name[algorithm-1]; %Cz&7qf"  
} qx~-(|s`H  
&z(E-w/S  
public static void sort(int[] data, int algorithm) { -r5JP[0kP  
impl[algorithm-1].sort(data); 5J4'\M  
} 9I;d>%  
CQx#Xp>=s  
public static interface Sort { ub/9T-#l  
public void sort(int[] data); C.[abpc  
} :_FnQhzg  
MIJ^ n(-G  
public static void swap(int[] data, int i, int j) { O+^l>+ZGj?  
int temp = data; "ebm3t@C  
data = data[j]; hY@rt,! 8  
data[j] = temp; 9=J+5V^qD<  
} |99/?T-QW  
} S_VZ^1X]  
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