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快速排序: ltNY8xrdGN
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package org.rut.util.algorithm.support; yF+mJ >kj
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import org.rut.util.algorithm.SortUtil; Ol|fdQ
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/** 4p6T0II_$
* @author treeroot M&H,`gm
* @since 2006-2-2 ocp
* @version 1.0 `G:hC5B
*/ t\Qm2Q)>
public class QuickSort implements SortUtil.Sort{ Vh]=sd<F
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/* (non-Javadoc) L;+e)I]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CUBL/U\=
*/ F6:LH,~8
public void sort(int[] data) { 2^:iU{
quickSort(data,0,data.length-1); 8E9k7
} ApplWa3
private void quickSort(int[] data,int i,int j){ (|3?wX'2U
int pivotIndex=(i+j)/2; B8!$?1*^a
//swap R"\(a
SortUtil.swap(data,pivotIndex,j); dX[Xe
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int k=partition(data,i-1,j,data[j]); r/HG{XH`
SortUtil.swap(data,k,j); Ea0EG>Y
if((k-i)>1) quickSort(data,i,k-1); \nL@P6X
if((j-k)>1) quickSort(data,k+1,j); cHVu6I?h
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} .SOCWznb
/** |W&K@g$
* @param data EZhk(LE
* @param i mGoC8t}iP
* @param j mD*!<<Sw
* @return P4c}@Mq3
*/ !FB2\hiM
private int partition(int[] data, int l, int r,int pivot) { 1 CV?
do{ 9[`\ZGWD
while(data[++l] while((r!=0)&&data[--r]>pivot); f2v~: u
SortUtil.swap(data,l,r); (#>Q#Izr
} ,jD-fL/:
while(l SortUtil.swap(data,l,r); .f!:@fX>=
return l; 47A[-&y*X
} j)juvat
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} ]5MT-qU
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改进后的快速排序: %+UTs'I
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package org.rut.util.algorithm.support; ]I;owk,
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import org.rut.util.algorithm.SortUtil; ww'B!Ml>F
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/** blaXAqe
* @author treeroot h_g"F@
* @since 2006-2-2 z@jKzyq
* @version 1.0 m}6>F0Kv
*/ "ZmxHMf
public class ImprovedQuickSort implements SortUtil.Sort { `H^
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private static int MAX_STACK_SIZE=4096; K;TTGK
private static int THRESHOLD=10; (@O,U
/* (non-Javadoc) >}u#KBedE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m&s;zQ
*/ gs~u8"B
public void sort(int[] data) { piIGSC
int[] stack=new int[MAX_STACK_SIZE]; (?.h<v1}
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int top=-1; " ;\EU4R
int pivot; +hH7|:JQ
int pivotIndex,l,r; &@PAv5iNf
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stack[++top]=0; 'p%w_VbI
stack[++top]=data.length-1; =H}}dC<)
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while(top>0){ !Uhc jfq`e
int j=stack[top--]; X-j<fX_
int i=stack[top--]; y35e3
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pivotIndex=(i+j)/2; ^6!8)7b
pivot=data[pivotIndex]; Lr`Gyl62
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SortUtil.swap(data,pivotIndex,j); Cth<x n(Q
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//partition bF +d_t
l=i-1; .ffr2\'*
r=j; 1 Va@w
do{ li}>xDSQ4
while(data[++l] while((r!=0)&&(data[--r]>pivot)); u (`7F(R
SortUtil.swap(data,l,r); mxwG~a'_
} sq8O+AWl
while(l SortUtil.swap(data,l,r); h{?f
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SortUtil.swap(data,l,j); 4k6:
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if((l-i)>THRESHOLD){ |CBJ8],mT
stack[++top]=i; KF`mOSP
stack[++top]=l-1; hm1.UE
} Imo?)dYK
if((j-l)>THRESHOLD){ :a( Oc'T
stack[++top]=l+1; T7M];@q
stack[++top]=j; BbzIQg:
} Ti#x62X{
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} 7~H$p X
//new InsertSort().sort(data); ;$4:
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insertSort(data); QCfR2Nn}
} AJP-7PPD
/** gO]8hLT
* @param data :1#$p
*/ +^4HCyW
private void insertSort(int[] data) { 2d&HSW
int temp; >R\!Qk
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 6%&w\<(SG
} 8%b-.O:_$
} i6^-fl
} o;pJjC]
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} (IAR-957pN
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