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快速排序: y!VL`xV
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package org.rut.util.algorithm.support; 1$)}EL
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import org.rut.util.algorithm.SortUtil; JLak>MS
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/** 8gxo{<,9
* @author treeroot |)y-EBZe\"
* @since 2006-2-2 KP)t,\@f!
* @version 1.0 %z6_ ,|%
*/ _%wB*u,X
public class QuickSort implements SortUtil.Sort{ `O]$FpO
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/* (non-Javadoc) S1o[)q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }z F,dst
*/ #Q"04'g
public void sort(int[] data) { (
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quickSort(data,0,data.length-1); 9Cs/B*3 )b
} wv
private void quickSort(int[] data,int i,int j){ 1 T}jK^"
int pivotIndex=(i+j)/2; NpH9},1i
//swap 2 b80b50
SortUtil.swap(data,pivotIndex,j); %)w7t[A2D
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int k=partition(data,i-1,j,data[j]); H5(:1
SortUtil.swap(data,k,j); ](^FGz
if((k-i)>1) quickSort(data,i,k-1); &S39SV
if((j-k)>1) quickSort(data,k+1,j); I23"DBR3
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} uN=f(-"
/** VA@
* @param data aUi^7;R&<
* @param i k'NP+N<M
* @param j `$MO;Fv,G
* @return @D$ogU,#
*/ zeD=-3
private int partition(int[] data, int l, int r,int pivot) { >avkiT2
do{ X]_9g[V
while(data[++l] while((r!=0)&&data[--r]>pivot); u{cb[M
SortUtil.swap(data,l,r); Y,?kS
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} d~q7!
while(l SortUtil.swap(data,l,r); n-{.7
return l; ?u5jXJ0L
} u%5 ,U-
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} _BoA&Ism
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改进后的快速排序: iD<}r?Z
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package org.rut.util.algorithm.support; p}e| E!
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import org.rut.util.algorithm.SortUtil; QT=i>X
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/** .O SQ8W}
* @author treeroot o$ #q/L
* @since 2006-2-2 5cb8=W-
* @version 1.0 b3ys"Vyn
*/ Z>~7|vl
public class ImprovedQuickSort implements SortUtil.Sort { :1;"{=Yx}
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private static int MAX_STACK_SIZE=4096; Z=
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private static int THRESHOLD=10; yZ)-=H
/* (non-Javadoc) V`rxjv}!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )d>Dcne
*/ &[
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public void sort(int[] data) { dM-~Qo
int[] stack=new int[MAX_STACK_SIZE]; U,lO{J[T
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int top=-1; ts;^,|h
int pivot; B%5"B} nG
int pivotIndex,l,r; /4}y2JVv)
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stack[++top]=0; k\RS L
stack[++top]=data.length-1; -XnOj2
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while(top>0){ R[rOzoNp0
int j=stack[top--]; FH{p1_kZ=
int i=stack[top--]; 'wWuR@e#&
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pivotIndex=(i+j)/2; c<sq0('`
pivot=data[pivotIndex]; 8T8]g M
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SortUtil.swap(data,pivotIndex,j); =}0$|@pl
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//partition v3(0Mu0J
l=i-1; ZiRCiQ/?
r=j; k"6v& O
do{ ?J-D6;
while(data[++l] while((r!=0)&&(data[--r]>pivot)); \YHl(
SortUtil.swap(data,l,r); AW'$5NF>
} Gzwb<e
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while(l SortUtil.swap(data,l,r); Lt
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SortUtil.swap(data,l,j); {Es1bO
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if((l-i)>THRESHOLD){ {;Oj
stack[++top]=i; ],{M``]q
stack[++top]=l-1; 24sQon
} E= .clA
if((j-l)>THRESHOLD){ P.jy7:dB,
stack[++top]=l+1; t>x!CNb'C
stack[++top]=j; WO6+r?0M2
} Htfq?\ FD
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} %-BwK
//new InsertSort().sort(data); yZ]?-7
insertSort(data); "
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} D={$l'y9p
/** ],vid1E
* @param data 2`> (LH
*/ w ~^{V4V
private void insertSort(int[] data) { orbz`IQc
int temp; JSx[V<7m
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 7PwH&rI
} shO4>Ha
} D[6wMep^n
} *1T~ruNqa
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} Wys$#pJ
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