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快速排序: Um15@p;
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package org.rut.util.algorithm.support; 5qG7LO.
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import org.rut.util.algorithm.SortUtil;
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/** f*5=,$0
* @author treeroot ?e]4HHgU]
* @since 2006-2-2 FNmIXpAn*@
* @version 1.0 s/sH",
*/ ZQl[h7c/N
public class QuickSort implements SortUtil.Sort{ ~z|/t^
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/* (non-Javadoc) qI;k2sQR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 ,D2][
*/ tk}qvW.Ii
public void sort(int[] data) { 8CA4gnh
quickSort(data,0,data.length-1); ,Z>Rv Ll
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private void quickSort(int[] data,int i,int j){ {,s:vPoiA
int pivotIndex=(i+j)/2; W11_MTIU
//swap fU)hn
SortUtil.swap(data,pivotIndex,j); kmov(V
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int k=partition(data,i-1,j,data[j]); zG&
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SortUtil.swap(data,k,j); ,~G _3Oz
if((k-i)>1) quickSort(data,i,k-1); \=yg@K?"AJ
if((j-k)>1) quickSort(data,k+1,j); 3\mFK$#sr
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} G =< KAJ
/** um3
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* @param data 7)_0jp~2
* @param i Nb]qY>K
* @param j S$JM01
* @return ZQ20IY|,
*/ #v(+3Hp
private int partition(int[] data, int l, int r,int pivot) { 9=<
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do{ 1Kc*MS
while(data[++l] while((r!=0)&&data[--r]>pivot); UBC[5E$
SortUtil.swap(data,l,r); `+zr PpX
} })!n1kt
while(l SortUtil.swap(data,l,r); @KS:d\l}U
return l; t1ZZru'r
} Rut6m5>
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改进后的快速排序: /pb7
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package org.rut.util.algorithm.support; 6 #{=
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