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快速排序: fb 8t9sAI
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package org.rut.util.algorithm.support; z|V5/"
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import org.rut.util.algorithm.SortUtil; U Ux]
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/** |GvWHe`
* @author treeroot Z/wKUK;
* @since 2006-2-2 D{{ME8
* @version 1.0 %`P6a38j
*/ Y70[Nz
public class QuickSort implements SortUtil.Sort{ bJo)rM:m
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/* (non-Javadoc) 9aR-kcvJIJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9$ z|kwU
*/ E,[@jxP
public void sort(int[] data) { G' ~Z'
quickSort(data,0,data.length-1); mOb*VH
} =Kv*M@
private void quickSort(int[] data,int i,int j){ [`~E)B1Y
int pivotIndex=(i+j)/2; >h0iq
//swap R`wL%I!?f
SortUtil.swap(data,pivotIndex,j); pb(YA/
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int k=partition(data,i-1,j,data[j]); &;%z1b>F
SortUtil.swap(data,k,j); c7[<X<yk
if((k-i)>1) quickSort(data,i,k-1); <#s=78
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if((j-k)>1) quickSort(data,k+1,j); L*Mt/
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} (hB&OP5Fne
/** -Cjc~{B>7X
* @param data 2Qqk?;^1
* @param i }hralef #N
* @param j w(QU '4~
* @return (RR:{4I
*/ Awo H d7M
private int partition(int[] data, int l, int r,int pivot) { (6R^/*-o
do{ B>3joe}
while(data[++l] while((r!=0)&&data[--r]>pivot); |&+0Tg~ZE
SortUtil.swap(data,l,r); Fq6sl}b(On
} y\DR,$Py
while(l SortUtil.swap(data,l,r); 9 wun$!>&
return l; F_9e ju^|
} El;\#la
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} (c X;a/BR
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改进后的快速排序: R\%&Q|
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package org.rut.util.algorithm.support; 3[g%T2&[
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import org.rut.util.algorithm.SortUtil; d`he
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/** U[EM<5@I
* @author treeroot TBN0u k
* @since 2006-2-2 uT'}_2=:
* @version 1.0 x=g=e
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*/ RKu'WD?sdH
public class ImprovedQuickSort implements SortUtil.Sort { 2sj[hI
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private static int MAX_STACK_SIZE=4096; Q ke8BRBn
private static int THRESHOLD=10; }pJ6CW
/* (non-Javadoc) t6GL/M4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )[d?&GK
*/
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public void sort(int[] data) { 2lVJ"jg
int[] stack=new int[MAX_STACK_SIZE]; /;7\HZ$@/
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int top=-1; 3;@/`Z_\lt
int pivot; 'OIOl
int pivotIndex,l,r; !}Sf?nP#
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stack[++top]=0; G%{J.J41F
stack[++top]=data.length-1; >h^CC*&'pw
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while(top>0){ yrp5\k*{y
int j=stack[top--]; hk
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int i=stack[top--]; D#ZzhHHP
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pivotIndex=(i+j)/2; O)y|G%O
pivot=data[pivotIndex]; 6w3z&5DY|
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SortUtil.swap(data,pivotIndex,j); #wXq'yi
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//partition E+LAE/v@
l=i-1; \qx$h!<
r=j; kvWP[! j?)
do{ k3F*D
while(data[++l] while((r!=0)&&(data[--r]>pivot)); Y$3 &?LA
SortUtil.swap(data,l,r); r5U[jwP
} L *a:j
while(l SortUtil.swap(data,l,r); |'$E-[
SortUtil.swap(data,l,j); Tm!pAD
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if((l-i)>THRESHOLD){ ]ow$VF{y
stack[++top]=i; dNH6%1(s]0
stack[++top]=l-1; [D!-~]5
} k9>2d' Q
if((j-l)>THRESHOLD){ O$F<x,
stack[++top]=l+1; h^yLmRL
stack[++top]=j; ;VhilWaF-
} h(q,-')l_
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} }V20~ hi
//new InsertSort().sort(data); c/:d$o-
insertSort(data); ;DQ{6(
} W7bA#p(
/** asDk@Gcu
* @param data {y5v"GR{YM
*/ 05
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private void insertSort(int[] data) { Lp!4X1/|\
int temp; Y nD_:ZK
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); :c4iXK0_^?
} %N jRD|
} (OA-Mgyc
} F8u;C:^d
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} G~z=,72
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