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快速排序: q@;z((45
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package org.rut.util.algorithm.support; ")l_>y?
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import org.rut.util.algorithm.SortUtil; t83n` LC
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/** N'L3Oa\%
* @author treeroot '_z#}P<
* @since 2006-2-2 @"jV^2oY1
* @version 1.0 0Hz*L,Bh4
*/ giy4<
public class QuickSort implements SortUtil.Sort{ c\.8hd=<
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/* (non-Javadoc) qb+vptg@I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *QzoBpO<
*/ VP4W~;UV|\
public void sort(int[] data) { kaxAIk8l
quickSort(data,0,data.length-1); Pv.z~~lY
} u!([m;
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private void quickSort(int[] data,int i,int j){ ]M|Iy~
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int pivotIndex=(i+j)/2; ^O
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//swap `P&L. m]|
SortUtil.swap(data,pivotIndex,j); < PoRnx
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int k=partition(data,i-1,j,data[j]); pKrol]cth8
SortUtil.swap(data,k,j); ni#!Gxw
if((k-i)>1) quickSort(data,i,k-1); %J06]FG7
if((j-k)>1) quickSort(data,k+1,j); '-F
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} VWoxi$3v
/** f#:7$:{F1
* @param data _"8\k7S*
* @param i z.f~wAT@<
* @param j :^mfTj$
* @return )-FQ_K%
*/ !BHIp7p
private int partition(int[] data, int l, int r,int pivot) { sF?N vp
do{ oWVlHAPj
while(data[++l] while((r!=0)&&data[--r]>pivot); !$'s?rnh
SortUtil.swap(data,l,r); Xp]tL3-p
} O>^0}
while(l SortUtil.swap(data,l,r); n237%LH[
return l; L3M]06y
} oI9Jp`
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改进后的快速排序: QE7
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package org.rut.util.algorithm.support; F{cKCqI?
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