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快速排序: xhq-$"B
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package org.rut.util.algorithm.support; qGezmkNFm
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import org.rut.util.algorithm.SortUtil; k+nfW]UNF
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/** M9*#8>
* @author treeroot xJ=@xfr$
* @since 2006-2-2 9|('*
* @version 1.0 wgETL|3-
*/ 98Dg[O
public class QuickSort implements SortUtil.Sort{ o=%pR|
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/* (non-Javadoc) 108cf~2&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ej;BI#gx=
*/ Wjf,AjL\
public void sort(int[] data) { <r`^iR)%
quickSort(data,0,data.length-1); 6$.I>8n
} tV'>9YVdG
private void quickSort(int[] data,int i,int j){ =uG}pgh0
int pivotIndex=(i+j)/2; BNj@~uC{
//swap p]lZ4#3
SortUtil.swap(data,pivotIndex,j); o$Jop"To
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int k=partition(data,i-1,j,data[j]); JI5%fU%O#n
SortUtil.swap(data,k,j); \x(ILk|'c
if((k-i)>1) quickSort(data,i,k-1); [v%j?
if((j-k)>1) quickSort(data,k+1,j); p$S\l] ,
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} 3=@lJ?Ym
/** 1Uy'TEk
* @param data iYPlgt/Y!
* @param i PKxI09B
* @param j GJeP~
* @return LtK= nK
*/ \H&8.<HJ
private int partition(int[] data, int l, int r,int pivot) { P #PRzt
do{ _G62E$=
while(data[++l] while((r!=0)&&data[--r]>pivot); 1x'H#
SortUtil.swap(data,l,r); hKjG/g:#G
} exP:lO_0n
while(l SortUtil.swap(data,l,r); aS
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return l; ag*5fBF
} R5b!Ao
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} .Xm?tC<
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