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快速排序: wg4Ol*y'
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; y7Nd3\v [\
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/** &W}6Xg(
* @author treeroot mgTzwE_\
* @since 2006-2-2 MnP+L'|
* @version 1.0 TSH'OW !b
*/ X.V4YmZ-;
public class QuickSort implements SortUtil.Sort{ */OKg;IMi
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/* (non-Javadoc) lf\^!E:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ; Kh!OBZFo
*/ G0h e'BR
public void sort(int[] data) { ^vJy<
quickSort(data,0,data.length-1); A: O"N
} L+CPT
private void quickSort(int[] data,int i,int j){ oS~;>]W
int pivotIndex=(i+j)/2; :_h#A}8Xd
//swap Ek60[a
SortUtil.swap(data,pivotIndex,j); q<K/q"0-l
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int k=partition(data,i-1,j,data[j]); 1/v#Z#3[
SortUtil.swap(data,k,j); V0G[f}tm'
if((k-i)>1) quickSort(data,i,k-1); rYM@e
if((j-k)>1) quickSort(data,k+1,j); dwouw*8
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} A@eR~Kp
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/** |_hIl(6F5N
* @param data tF6-@T\6
* @param i kz G W/
* @param j abp\Ih^b
* @return "-P z2QJY
*/ V@nZ_.
private int partition(int[] data, int l, int r,int pivot) { L9]d$ r"
do{ Fw8b^ew
while(data[++l] while((r!=0)&&data[--r]>pivot); DUwms"I,%
SortUtil.swap(data,l,r); (o^?i2)g
} !gcea?I
while(l SortUtil.swap(data,l,r); pq:[`
return l; rl
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} QZ+G2$
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} o?^Rw*u0/
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改进后的快速排序: nG-DtG^z
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package org.rut.util.algorithm.support; ?XV3Y3
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import org.rut.util.algorithm.SortUtil; V{fG~19
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/** x.sC015Id
* @author treeroot OlgM7Vrl
* @since 2006-2-2 0Bk-)z|V
* @version 1.0 7nsovWp
*/ q0b*#j
public class ImprovedQuickSort implements SortUtil.Sort { EMDYeXpV
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private static int MAX_STACK_SIZE=4096; {w@9\LsU
private static int THRESHOLD=10; PsZ>L
/* (non-Javadoc) av_ +M;G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MY^o0N
*/ e-%q!F(Bf
public void sort(int[] data) { /t*Q"0X5
int[] stack=new int[MAX_STACK_SIZE]; =&<d4'(Qk
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int top=-1; T^A[m0mk
int pivot; X]o"vx%C
int pivotIndex,l,r; ~[f`oC
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stack[++top]=0; 4_# (y^9
stack[++top]=data.length-1; QP<.~^ao
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while(top>0){ 8A}<-?>
int j=stack[top--]; 2%*\XPt)
int i=stack[top--]; 8m?cvI
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pivotIndex=(i+j)/2; j6j4M,UI43
pivot=data[pivotIndex]; xdVsbW)L2
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SortUtil.swap(data,pivotIndex,j); h6}rOchj
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//partition wk{]eD%
l=i-1; ~SmFDg$/m
r=j; [KCR@__
do{ )1YX+',"
while(data[++l] while((r!=0)&&(data[--r]>pivot)); X4+H8],)
SortUtil.swap(data,l,r); \#IKirf?
} `5"3Cj"M
while(l SortUtil.swap(data,l,r); X\>/'fC$
SortUtil.swap(data,l,j); KzJJ@D*4M]
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if((l-i)>THRESHOLD){ EB@rIvUi,
stack[++top]=i; ZAn9A>5_
stack[++top]=l-1; T%;NW|mH&
} ,gM:s}l!dJ
if((j-l)>THRESHOLD){ 6 !N2B[9
stack[++top]=l+1; @sW!g;\T
stack[++top]=j; :G]t=vr1
} oX'@,(6)
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} 9p1@Lfbj
//new InsertSort().sort(data); \(&&ed:
insertSort(data); TQPrOs?
} 9M;Y$Z
/** AX{7].)F
* @param data eKo=g|D
*/ ;),,Hk
private void insertSort(int[] data) { k8l7.e*
int temp; w9mAeGyE
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ~|N,{GaL
} /a9CqK
} 9MQjSNYzo
} id" l"
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} ]EUQMyR
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