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快速排序: '[Ap/:/UY
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package org.rut.util.algorithm.support; QpxRYv
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import org.rut.util.algorithm.SortUtil; |`B*\\ 1
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/** S:aAR*<6
* @author treeroot w\ 4;5.$
* @since 2006-2-2 NCR4n_
* @version 1.0 !W4A9Th
*/ O9?t,1
public class QuickSort implements SortUtil.Sort{ A/ZZ[B-
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/* (non-Javadoc) a~ sU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iI\bD
*/ pBl'SQccp
public void sort(int[] data) { awxzP*6
quickSort(data,0,data.length-1); O<[h
} K9O%SfshF
private void quickSort(int[] data,int i,int j){ xV w9_il2a
int pivotIndex=(i+j)/2; 5#|D1A
//swap X$Eg(^L a
SortUtil.swap(data,pivotIndex,j); cLhHGwX=x
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int k=partition(data,i-1,j,data[j]); {BPNb{dBKr
SortUtil.swap(data,k,j); ?&A)%6` ~
if((k-i)>1) quickSort(data,i,k-1); w*#B_6bG
if((j-k)>1) quickSort(data,k+1,j); }x!=F<Q!r
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} qw?#~"Ca.
/** u-qwG/$E
* @param data eYNu78u
* @param i $]LhE:!G
* @param j OD{()E?1B
* @return m03D+@F
*/ JV_VF'
private int partition(int[] data, int l, int r,int pivot) { bvn%E
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do{ NN>E1d=
while(data[++l] while((r!=0)&&data[--r]>pivot); rG[iEY
SortUtil.swap(data,l,r); m-T@Og
} jR1t&UD3Y
while(l SortUtil.swap(data,l,r); '^mCLfo0}
return l; 9|BH/&$
} d ? Uj3G
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} @2(7
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改进后的快速排序: n92*:Y
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package org.rut.util.algorithm.support; .h c-uaL
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import org.rut.util.algorithm.SortUtil; m{#?fR=9
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/** X;:qnnO
* @author treeroot P'}WmE'B}F
* @since 2006-2-2 2:[
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* @version 1.0 J:D{5sE<|
*/ ({&