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快速排序: 09McUR@
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package org.rut.util.algorithm.support; }S iR;2W
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import org.rut.util.algorithm.SortUtil; Wm1dFf.>
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/** ?"'+tZ=f6
* @author treeroot a;5clonB
* @since 2006-2-2 \i?bt0 bM
* @version 1.0 e<+)IW:
*/ h,y_^cf
public class QuickSort implements SortUtil.Sort{ In4VS:dD
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/* (non-Javadoc) Yv=L'0K&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NcbW"Qv3
*/ J#:`'eEG
public void sort(int[] data) { Tf=1p1!3
quickSort(data,0,data.length-1); WS6Qp`c)e
} ")9 ^
private void quickSort(int[] data,int i,int j){ `Cd!
int pivotIndex=(i+j)/2; i~E0p
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//swap t[;-gi,,
SortUtil.swap(data,pivotIndex,j); '-(Z.e~e
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int k=partition(data,i-1,j,data[j]); a`:F07r
SortUtil.swap(data,k,j); 3 }sy{Mx%9
if((k-i)>1) quickSort(data,i,k-1); E<D^j^T
if((j-k)>1) quickSort(data,k+1,j); #"oLz"{
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} d lAb`ne
/** CqWO 0
* @param data 3rMi:*?
* @param i [g`4$_9S
* @param j rR^o
* @return oNYFbZw
*/ 6Ik
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private int partition(int[] data, int l, int r,int pivot) { 'k}w|gNB
do{ 3-AOB3](
while(data[++l] while((r!=0)&&data[--r]>pivot); v6wg,,T
SortUtil.swap(data,l,r); [xb'73
} d" 0&=/
while(l SortUtil.swap(data,l,r); _J2?B?S/j
return l; GB Vqc!d
} OK-*TPrc
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} $mf O:%
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改进后的快速排序: toU<InN
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