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快速排序: mj@13$=
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package org.rut.util.algorithm.support; X[TR3[1}
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import org.rut.util.algorithm.SortUtil; t&DEb_"De
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/** 29q _BR *:
* @author treeroot `@|$,2[C
* @since 2006-2-2 ^sg,\zD 'X
* @version 1.0 b>9>uC@J15
*/ 01o4Th m
public class QuickSort implements SortUtil.Sort{ >-{Hyx
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/* (non-Javadoc) RCLeA=/N@0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~^b/(
*/ u>/ TE
public void sort(int[] data) { \5cpFj5%
quickSort(data,0,data.length-1); }4S6Xe
} ;6hOx(>`=
private void quickSort(int[] data,int i,int j){ Dn }Jxu'(
int pivotIndex=(i+j)/2; 2dgd~
//swap !5?<% *
SortUtil.swap(data,pivotIndex,j); C2)2)
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int k=partition(data,i-1,j,data[j]); c6/=Gq{.
SortUtil.swap(data,k,j); sUm'
if((k-i)>1) quickSort(data,i,k-1); W+1^4::+
if((j-k)>1) quickSort(data,k+1,j); B,fo(kG
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} 7vj2
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/** dGTsc/$
* @param data :p6M=
* @param i O<W_fx8_'
* @param j -s'-eQF J
* @return ?P c' C
*/ pFz`}?c0
private int partition(int[] data, int l, int r,int pivot) { !$>R j
do{ Nl(Foya%)
while(data[++l] while((r!=0)&&data[--r]>pivot); RY*U"G0#w
SortUtil.swap(data,l,r); F1Bq$*'N$w
} 5 + MS^H
while(l SortUtil.swap(data,l,r); $
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return l; b\+`e b8_
} [;sRV<
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} $7A8/#
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改进后的快速排序: 7 x?<*T
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package org.rut.util.algorithm.support; U|j`e5)
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import org.rut.util.algorithm.SortUtil; 5.J.RE"M
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/** mUx+Y ]Ep
* @author treeroot 63x?MY6
* @since 2006-2-2 R,=fv
* @version 1.0 iMRwp+$
*/ '(jG[ry&T
public class ImprovedQuickSort implements SortUtil.Sort { [;myHI`tw
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private static int MAX_STACK_SIZE=4096; % +\."eC
private static int THRESHOLD=10; Hg (Gl
/* (non-Javadoc) TrR8?-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]L}dzA?:
*/ j^2j&Ta
public void sort(int[] data) { v1,oilL
int[] stack=new int[MAX_STACK_SIZE]; gr-OHeid
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int top=-1; I[X772K
int pivot; &~U ] ~;@
int pivotIndex,l,r; B@
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stack[++top]=0; Tc3yS(aq
stack[++top]=data.length-1; ^\,E&=/}M
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while(top>0){ 0NX,QD
int j=stack[top--]; 4tmAzD
int i=stack[top--]; l0i^uMS
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pivotIndex=(i+j)/2; D*|Bb?
pivot=data[pivotIndex]; ! #2{hQRu
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SortUtil.swap(data,pivotIndex,j); .y:U&Rw4
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//partition b<gr@ WF
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r=j; Jma1N;d
do{ P\)iZiGc
while(data[++l] while((r!=0)&&(data[--r]>pivot)); cD'V>[h
SortUtil.swap(data,l,r); fw{gx
} Q6I:"2u1
while(l SortUtil.swap(data,l,r); n#_$\
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SortUtil.swap(data,l,j); C'}KTXiRW
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if((l-i)>THRESHOLD){ v^+Sh|z/
stack[++top]=i; "AGLVp.zT
stack[++top]=l-1; WX6&oy>
} L5:$U>H(
if((j-l)>THRESHOLD){ !0mI;~q| F
stack[++top]=l+1; U}j0D2
stack[++top]=j; 'F#KM1s
} $l&(%\pp
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} n^6j9FQ7
//new InsertSort().sort(data); fIv* T[
insertSort(data); -4_$lnw$
} x5 *!Wx
/** (qulwOt~w
* @param data ^eYVWQ'
*/ 0F><P?5
private void insertSort(int[] data) { Bh]P{H%
int temp; '$zIbQ:
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); RQu(Wu|m.
} (;^syJrh
} J!U}iD@occ
} S\!ana])
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} 7g}w+p>
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