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快速排序: hbn2(e;FZ
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package org.rut.util.algorithm.support; g&&5F>mF
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import org.rut.util.algorithm.SortUtil; iFpJ/L
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/** IE,xiV
* @author treeroot >=$( ,8"
* @since 2006-2-2
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* @version 1.0 @=:( b"Sg
*/ V
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public class QuickSort implements SortUtil.Sort{ y 1z4qSeM
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/* (non-Javadoc) r6JdF!\d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <$/'iRtRzW
*/ r65/O5F
public void sort(int[] data) { 66!cfpM
quickSort(data,0,data.length-1); |h4aJv
} >}Fe9Y.o
private void quickSort(int[] data,int i,int j){ X)x$h{ OE
int pivotIndex=(i+j)/2; HOBM?|37CU
//swap EN'}+E
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SortUtil.swap(data,pivotIndex,j); qE!.C}L+
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int k=partition(data,i-1,j,data[j]); J1KV?aR
SortUtil.swap(data,k,j); rISg`-
if((k-i)>1) quickSort(data,i,k-1); p78X,44xg
if((j-k)>1) quickSort(data,k+1,j); *+rO3% ;t
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} iW9G0Ay
/** '+JU(x{CCl
* @param data N8_
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* @param i rK7m(
* @param j 4:WN-[xX
* @return 3%p^>D\
*/ =*_T;;E
private int partition(int[] data, int l, int r,int pivot) { GB&<+5t2
do{ aOIE9wO
while(data[++l] while((r!=0)&&data[--r]>pivot); #+>8gq^5
SortUtil.swap(data,l,r); cA
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} vu Vcv
while(l SortUtil.swap(data,l,r); 5R"iF+p4
return l; t Y'fFz^Ho
} 2Sz?r d,0f
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} f_I6g uDPz
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改进后的快速排序: * `1W})
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package org.rut.util.algorithm.support; Wo+fMn(O
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import org.rut.util.algorithm.SortUtil; /?C}PM
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/** *.qm+#8W
* @author treeroot $q%r}Cdg
* @since 2006-2-2 mO=bq4!
* @version 1.0 .W>LEz'
*/ \W:~;GMeD
public class ImprovedQuickSort implements SortUtil.Sort { _!2bZ:emG
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private static int MAX_STACK_SIZE=4096; mhpaPin*JS
private static int THRESHOLD=10; Vz[tgb]-
/* (non-Javadoc) X+dLk(jI`u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1g<jr.
*/ -!4Mmp"2@u
public void sort(int[] data) { Jga;nrU
int[] stack=new int[MAX_STACK_SIZE]; JB[n]|
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int top=-1; m?*}yM
int pivot; p(vmMWR!
int pivotIndex,l,r; 8725ET
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stack[++top]=0; =cz^g^7
stack[++top]=data.length-1; <MdIQ;I8
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while(top>0){ {B|)!_M#
int j=stack[top--]; u2\QhP 9
int i=stack[top--]; &pCa{p
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pivotIndex=(i+j)/2; 9+S$,|9
pivot=data[pivotIndex]; ZMa@/\pf1
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SortUtil.swap(data,pivotIndex,j); |0^~S
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//partition ' ?tx?t
l=i-1; ]40@yrc
r=j; CmP_9M?ce
do{ VO
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while(data[++l] while((r!=0)&&(data[--r]>pivot)); ;[)O{%s
SortUtil.swap(data,l,r); ?E +[
} JO[7_*s
while(l SortUtil.swap(data,l,r); skeH~-`M@
SortUtil.swap(data,l,j); 9fQ[:Hl"
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if((l-i)>THRESHOLD){ {$AwG#kt
stack[++top]=i;
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stack[++top]=l-1; 5TynAiSD_>
} 9 ^+8b9y
if((j-l)>THRESHOLD){ {(#2G,
stack[++top]=l+1; +PAb+E|,
stack[++top]=j; ^GL>xlZ(
} {f1iys'Om
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} @y1:=["b
//new InsertSort().sort(data); /Pv
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insertSort(data); -F7P$/9
} &dsXK~9M>
/** 9u0<$UY%
* @param data 9Ib#A
*/ u,~/oTgO
private void insertSort(int[] data) { z ?L]5m`H
int temp; ?Z(xu~^/
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); pE4yx5r5
} !FA[
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} 2]:Z7Ji
} 'f_[(o+n
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} &iI5^b-P
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