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快速排序: aNDpCpy
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package org.rut.util.algorithm.support; W'!
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import org.rut.util.algorithm.SortUtil; Q$58K9
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/** q~6a$8+t
* @author treeroot Nf!WqD* je
* @since 2006-2-2 VxW>XxG0
* @version 1.0 8{DW$ZtR
*/ Ge^(Ag}vE
public class QuickSort implements SortUtil.Sort{ %pj T?G7
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/* (non-Javadoc) tb/`*Yl@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9(pF!}1%\
*/ (;cKv
public void sort(int[] data) { c0f8*O4i
quickSort(data,0,data.length-1); W'{o`O=GGr
} 4)Ab]CdD
private void quickSort(int[] data,int i,int j){ E>isl"
int pivotIndex=(i+j)/2; 'BX
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//swap D $&6 8
SortUtil.swap(data,pivotIndex,j); B+4WnR1%T
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int k=partition(data,i-1,j,data[j]); $Y?[[>u
SortUtil.swap(data,k,j); -58Sb"f
if((k-i)>1) quickSort(data,i,k-1); 1qm
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if((j-k)>1) quickSort(data,k+1,j); {xu~Dx
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} #ja6nt8GC
/** &6&$vF65c
* @param data l&{+3 aC:
* @param i OICH:(t_
* @param j MmH(dp+
* @return Y$0K}`{
*/ r*f:%epB%
private int partition(int[] data, int l, int r,int pivot) { d$B+xW
do{ WXFCe@
while(data[++l] while((r!=0)&&data[--r]>pivot); 3eN(Sw@p
SortUtil.swap(data,l,r); 4Ul*`/d
} ~tZy-1
while(l SortUtil.swap(data,l,r); t*wV<b
return l; Q5 =
} [PH56f
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} }e-D&