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快速排序: Ta0Ln
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package org.rut.util.algorithm.support; I<v:xTor
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import org.rut.util.algorithm.SortUtil; SA1|7
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/** [LcHO] _^M
* @author treeroot /ZcqKC
* @since 2006-2-2 :% o32
* @version 1.0 `_*NFv1_
*/ 6gSo>F4=
public class QuickSort implements SortUtil.Sort{ _t+.I9kQ
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/* (non-Javadoc) `VB]4i}u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =5PNH 2
*/ f-M 9OI
public void sort(int[] data) { D. _*p
quickSort(data,0,data.length-1); |`
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} U:[#n5g
private void quickSort(int[] data,int i,int j){ Z[&7NJo(
int pivotIndex=(i+j)/2; ,m^@S
//swap w)u6J,
SortUtil.swap(data,pivotIndex,j); D-GI rw{>5
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int k=partition(data,i-1,j,data[j]); y66V`,e0
SortUtil.swap(data,k,j); F_ Cp,
if((k-i)>1) quickSort(data,i,k-1); FN)vFQ#J
if((j-k)>1) quickSort(data,k+1,j); kq m$a
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} k&kx%skz
/** k'hJ@6eKS
* @param data Gx.iZOOH/
* @param i 9sR?aW^$,/
* @param j g/2e Y$6Z
* @return :Jz@` s1n
*/ AzwG_XgM)
private int partition(int[] data, int l, int r,int pivot) { Sjogv
do{ pP`KI'aUN
while(data[++l] while((r!=0)&&data[--r]>pivot); ^9 g+\W
SortUtil.swap(data,l,r); .@(+.G
} sdWu6?B_
while(l SortUtil.swap(data,l,r); :mpR}.^hv
return l; .^Z^L F
} !x, ;&
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} tCw.wDq3=
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改进后的快速排序: >>'t7U##
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package org.rut.util.algorithm.support; HalkNR-eEm
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import org.rut.util.algorithm.SortUtil; +/L "A
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/** j|N8"8"
* @author treeroot l_Ffbs_6t
* @since 2006-2-2 qBkI9H
* @version 1.0 tmCm54
*/ |6mDooTy
public class ImprovedQuickSort implements SortUtil.Sort { :YAxL J
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private static int MAX_STACK_SIZE=4096; =h#3D?b0n
private static int THRESHOLD=10; m^O9G?
/* (non-Javadoc) WrS|$: 0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }.uB6&!:
*/ U!0 Qf7D
public void sort(int[] data) { JMnk~8O
int[] stack=new int[MAX_STACK_SIZE]; %Q0J$eC
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int top=-1; yLo{^4a.
int pivot; ##6_kcL:6G
int pivotIndex,l,r; R-8/BTls7
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stack[++top]=0; s /?&H-
stack[++top]=data.length-1; cP4K9:k
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while(top>0){ PhS`,I^Z
int j=stack[top--]; NVTNjDF%s
int i=stack[top--]; cvf@B_iN9
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pivotIndex=(i+j)/2; #..-!>lY
pivot=data[pivotIndex]; ]T3dZ`-(
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SortUtil.swap(data,pivotIndex,j); S;582H9D
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//partition I^5T9}>Q
l=i-1; ]G0`W6;$]
r=j; YEEgDw]BQ
do{
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while(data[++l] while((r!=0)&&(data[--r]>pivot)); '}`|QJ
SortUtil.swap(data,l,r); V
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} /<HEcB
while(l SortUtil.swap(data,l,r); Y[A`r0
SortUtil.swap(data,l,j); 1D,$Az~.
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if((l-i)>THRESHOLD){ S<hj6A
stack[++top]=i; GS%i<HQ3
stack[++top]=l-1; suh@
} n.[0#Ur&}
if((j-l)>THRESHOLD){ {L!w/Ie X
stack[++top]=l+1; Bh9O<|E
stack[++top]=j; !Cm<K*c"&E
} M>mk=-l
v}=3
} reyN5n~4U
//new InsertSort().sort(data); zS@"ITy
insertSort(data); $GzTDq
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} e$k]z HlQ
/** >bf29tr
* @param data 0 L34)W
*/ -XVC,.Ly
private void insertSort(int[] data) { hSgfp
int temp; ZWC-<QO"<
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 6,"fH{Bd
} ^lqcF.
} AxaabS$\
} Pez 7HKW:
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} iY=M67V
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