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快速排序: x=pq-&9>B
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package org.rut.util.algorithm.support; B<SuNbR
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import org.rut.util.algorithm.SortUtil; Smzy EMT
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/** iq)4/3"6
* @author treeroot y/Fv4<X
* @since 2006-2-2 6J9^:gXW~
* @version 1.0 <5?.s<
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*/ FX`SaY>D
public class QuickSort implements SortUtil.Sort{ h|$.`$
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/* (non-Javadoc) 9+)5 #!0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aF7" 4^ P
*/ l ~kxt2&
public void sort(int[] data) { +Em+W#i%?
quickSort(data,0,data.length-1); vn}:$|r$J
} l`G .lM(
private void quickSort(int[] data,int i,int j){ Zg"g/I.+d
int pivotIndex=(i+j)/2; R=yn4>I
//swap `rzgC \
SortUtil.swap(data,pivotIndex,j); v_3r8My-
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int k=partition(data,i-1,j,data[j]); BUqe~E|I
SortUtil.swap(data,k,j); ~mP#V
if((k-i)>1) quickSort(data,i,k-1); W-ErzX
if((j-k)>1) quickSort(data,k+1,j); 5(R ./
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} N2[EdOJT_
/** w#_/CUL
* @param data PTfTT_t
* @param i 4loG$l+a1
* @param j H(GWC[tv
* @return 4,"%
*/ Lgw!S~0
private int partition(int[] data, int l, int r,int pivot) { ^"WrE(3
do{ d%FD=wm
while(data[++l] while((r!=0)&&data[--r]>pivot); Pb4%"9`
SortUtil.swap(data,l,r); &sleV5V
} ,_?P[~1
while(l SortUtil.swap(data,l,r); {gT2G*Ed^Z
return l; ys`"-o[*
} \ws<W7
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改进后的快速排序: 4+qoq$F</
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