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快速排序: v[|iuOU
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package org.rut.util.algorithm.support; ;dWqMnV
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import org.rut.util.algorithm.SortUtil; ;,A\bmC
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/** 7uDUZdJy
* @author treeroot T#BOrT>V
* @since 2006-2-2 @!MbPS
* @version 1.0 foFn`?LF
*/ X%-4x
public class QuickSort implements SortUtil.Sort{ wd]Yjr#%Ii
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/* (non-Javadoc) <7&b|f$CL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k@Tt,.];
*/ "_l[4o[D
public void sort(int[] data) { 0PfFli`2;
quickSort(data,0,data.length-1); @<PL
} 4Oy
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private void quickSort(int[] data,int i,int j){ |s^ar8)=)
int pivotIndex=(i+j)/2; vLke,MKW
//swap s=nds"J
SortUtil.swap(data,pivotIndex,j); kp$ILZ
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int k=partition(data,i-1,j,data[j]); ?~K2&eo
SortUtil.swap(data,k,j); P:=ADW c
if((k-i)>1) quickSort(data,i,k-1); fr?eOigbl
if((j-k)>1) quickSort(data,k+1,j); 'I~dJEW7
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/** }Q=Zqlvz
* @param data f
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* @param i Vg+SXq6G
* @param j {k*_'0
* @return lV
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*/ CL*%06QyE
private int partition(int[] data, int l, int r,int pivot) { 9mnON~j5
do{ |l|]Tw
while(data[++l] while((r!=0)&&data[--r]>pivot); (NQ[AypMI
SortUtil.swap(data,l,r); <