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快速排序: y)gKxRaCS
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package org.rut.util.algorithm.support; r"R#@V\'1b
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import org.rut.util.algorithm.SortUtil; zv"Z DRW
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/** .GcKa024
* @author treeroot j8`BdKg
* @since 2006-2-2 u~-8d;+?y
* @version 1.0 +2j AC r
*/ $tS}LN_!
public class QuickSort implements SortUtil.Sort{ 9&ids!W~yx
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/* (non-Javadoc) 40<mrVl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +d;bjo 2
*/ PiYxk+N
public void sort(int[] data) { 1sH&
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quickSort(data,0,data.length-1); e 3TI|e_
} &8 x-o,
private void quickSort(int[] data,int i,int j){ yvYad
int pivotIndex=(i+j)/2; vZoaT|3
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//swap eGHaY4|
SortUtil.swap(data,pivotIndex,j); + ?!(G}5
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int k=partition(data,i-1,j,data[j]); C2Tyoza
SortUtil.swap(data,k,j); tNX|U:Y*
if((k-i)>1) quickSort(data,i,k-1); >e"#'K0?\
if((j-k)>1) quickSort(data,k+1,j); YUIi;
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} }Z,x~G
/** XvlU*TO~(~
* @param data # Vha7
* @param i Qz
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* @param j .VzT:4-<Q"
* @return 1y4
*/ 4_cqT/
private int partition(int[] data, int l, int r,int pivot) { 0_t`%l=
do{ U ZsH9
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while(data[++l] while((r!=0)&&data[--r]>pivot); 680o)hh4m>
SortUtil.swap(data,l,r); :Zz
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} N*&1GT#9
while(l SortUtil.swap(data,l,r); xK\d4"
return l; e@OX_t_
} {8%a5DiM
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} 9p2&)kb6
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改进后的快速排序: {,~3.5u
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package org.rut.util.algorithm.support; igR";OQk
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import org.rut.util.algorithm.SortUtil; ;BIY^6,7e
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/** j ?(&#
* @author treeroot ^M>P:~
* @since 2006-2-2 KMjhZap%
* @version 1.0 1PV'?tXp(
*/ xX4N4vb
public class ImprovedQuickSort implements SortUtil.Sort { "!%l/_p?
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private static int MAX_STACK_SIZE=4096; :A'y+MnK<
private static int THRESHOLD=10; '(L7;+E
/* (non-Javadoc) e;}7G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DZPPJ2 }
*/ nK%LRcAs
public void sort(int[] data) { QW(Mz Hg
int[] stack=new int[MAX_STACK_SIZE]; }@+:\
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int top=-1; C&rkvM8
int pivot;
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int pivotIndex,l,r; xx%j.zDI]
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stack[++top]=0; _8_R 1s
stack[++top]=data.length-1; psMvq@>
*6DB0X_-}
while(top>0){ g~A`N=r;h
int j=stack[top--]; HqT#$}rv
int i=stack[top--]; "mvt>X
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pivotIndex=(i+j)/2; DG:Z=LuJr
pivot=data[pivotIndex]; l&Q`wR5e
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SortUtil.swap(data,pivotIndex,j); 76h ,]xi
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//partition =w
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l=i-1; l#Y,R 0
r=j; XLOh7(
do{ "]b<uV
while(data[++l] while((r!=0)&&(data[--r]>pivot)); D!-g&HBTC
SortUtil.swap(data,l,r); FZslv"F
} <s<n
while(l SortUtil.swap(data,l,r); S2GxV/E
SortUtil.swap(data,l,j); p xa*'h"b^
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if((l-i)>THRESHOLD){ EVC]sUT
stack[++top]=i; R3&Iu=g
stack[++top]=l-1; 54R#W:t
} !_'ur>iR
if((j-l)>THRESHOLD){ '=8d?aeF
stack[++top]=l+1; MXNFlP
stack[++top]=j; uH- l%17
} LR.<&m%~.
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} A1>OY^p3%
//new InsertSort().sort(data); 70tH:Z)"
insertSort(data); WX|`1b
} ~^fZx5
/** j0evq+
* @param data G[I"8iS,
*/ JL}_72gs
private void insertSort(int[] data) { dV$gB<iS
int temp; Y;^l%ePuW
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ZyPVy
} .Una+Z
} ARwD~Tr
} HjD8u`qQ
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} Eq9x2
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