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快速排序: zLjgCS<7
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package org.rut.util.algorithm.support; \Z)1 ?fq
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import org.rut.util.algorithm.SortUtil; lpQP"%q
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/** [_DPxM=V
* @author treeroot _[Gb)/@mM
* @since 2006-2-2 V:K;] h*!
* @version 1.0 <SXZx9A!
*/ -$Y8!5 4
public class QuickSort implements SortUtil.Sort{ (;o*eFC F
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/* (non-Javadoc) N}/>r D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uf,fX/:!
*/ Q49BU@xX
public void sort(int[] data) { 2JO-0j.
quickSort(data,0,data.length-1); 10N,?a
} ?_4^le[;
private void quickSort(int[] data,int i,int j){ f>iuHR*EXB
int pivotIndex=(i+j)/2; c;!g
//swap `bgb*Yaod
SortUtil.swap(data,pivotIndex,j); 2YQ#-M
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int k=partition(data,i-1,j,data[j]); g,lY ut
SortUtil.swap(data,k,j); IlZu~B9c
if((k-i)>1) quickSort(data,i,k-1); nsJ:Osq|
if((j-k)>1) quickSort(data,k+1,j); f'/ KMe%<
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} tW6#e(^l6
/** ~
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* @param data r%MyR8'k]
* @param i sWxK~Yg
* @param j 0<P(M: a
* @return }""p)Y&
*/ c8Pb
private int partition(int[] data, int l, int r,int pivot) { XL"=vbD
do{ |'w^ n
while(data[++l] while((r!=0)&&data[--r]>pivot); Z] { @H
SortUtil.swap(data,l,r); ?MZ:_'2p
} Qilj/x68
while(l SortUtil.swap(data,l,r); qpgU8f
return l; H1UL.g%d=
} b.Su@ay@(^
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} HYIRcY
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改进后的快速排序: q6)N*?
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package org.rut.util.algorithm.support; Uz>Yn&{y6
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import org.rut.util.algorithm.SortUtil; &t[|%c*D&
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/** b+$o4l/x
* @author treeroot !$E~\uT
* @since 2006-2-2 'wE\{1~_[+
* @version 1.0 `i4I!E
*/ 24|<<Xn
public class ImprovedQuickSort implements SortUtil.Sort { sA2o2~AmM
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private static int MAX_STACK_SIZE=4096; bw;iz,Z
private static int THRESHOLD=10; *^6k[3VY
/* (non-Javadoc) Q0SW;o7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cUM_ncYOP
*/ ORtg>az\%
public void sort(int[] data) { =#'+"+lQ }
int[] stack=new int[MAX_STACK_SIZE]; W:>J864!
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int top=-1; qa;EI ;8
int pivot; Ps |QW
int pivotIndex,l,r; G4);/#
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stack[++top]=0; 6NSO >/E
stack[++top]=data.length-1; a[JZ5D
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while(top>0){ nO:HB.&@
int j=stack[top--]; QS%,7'EG
int i=stack[top--]; e
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pivotIndex=(i+j)/2; S#hu2\9D,
pivot=data[pivotIndex]; c}8 -/P=
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SortUtil.swap(data,pivotIndex,j); jUZ[`f;
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//partition <JJkki
l=i-1; JN)"2}SE
r=j; r5Wkc$
do{ iF+S%aPd#
while(data[++l] while((r!=0)&&(data[--r]>pivot)); q>c+bo
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SortUtil.swap(data,l,r); UT% #K %
} 3me<~u
while(l SortUtil.swap(data,l,r); Jn60i6/
SortUtil.swap(data,l,j); AwA1&mh
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if((l-i)>THRESHOLD){ W3aXW,P. V
stack[++top]=i; a?l_-Fi
stack[++top]=l-1; s%hU*^ 8
} |\rSa^:5
if((j-l)>THRESHOLD){ +0SW ?#%
stack[++top]=l+1; EF0Pt
stack[++top]=j; yr (g~MQ
} 4$qNcMdz
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} _Eszr(zJ
//new InsertSort().sort(data); VoWA tNU
insertSort(data); eR(\s_`
} aViJ
/** k q/t]%(
* @param data ;,()wH
*/ \=$EmHF
private void insertSort(int[] data) { 0@JilGk1u
int temp; z0=Rp0_W
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 6sO
} <=#lRZW[z
} Qo]vpp^[#
} O-y6!u$6&
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} -ryDsq
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