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快速排序: A9?h*/$
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package org.rut.util.algorithm.support; ;RmL'
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import org.rut.util.algorithm.SortUtil; PB
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/** }'"4q
* @author treeroot v0d<P2ix
* @since 2006-2-2 C6!P8qX
* @version 1.0 B!;qz[]I
*/ -F]0Py8(
public class QuickSort implements SortUtil.Sort{ FL,av>mV
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/* (non-Javadoc) uB`H9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wva| TZ
*/ :k-(%E](
public void sort(int[] data) { VSxls
quickSort(data,0,data.length-1); cNd;qO0$
} K;n5[o&c
private void quickSort(int[] data,int i,int j){ IK
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int pivotIndex=(i+j)/2; 6F@2:]W
//swap {m<NPtp910
SortUtil.swap(data,pivotIndex,j); EYsf<8cl
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int k=partition(data,i-1,j,data[j]); U#7moS'r
SortUtil.swap(data,k,j); ';CL;A ;
if((k-i)>1) quickSort(data,i,k-1); ?>\JX
if((j-k)>1) quickSort(data,k+1,j); A3!xYG=+
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} OLl?1
/** Dd=iYMm7
* @param data aS7%x>.A!
* @param i x+X^K_*
* @param j Y!+q3`-%T
* @return q%RPAe
*/ UTThl2=+
private int partition(int[] data, int l, int r,int pivot) { `akbzHOM
do{ pYtvenBy
while(data[++l] while((r!=0)&&data[--r]>pivot); Mzbbr57n
SortUtil.swap(data,l,r); ^<