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快速排序: /O}<e TR
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package org.rut.util.algorithm.support; UMR ?q0J
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import org.rut.util.algorithm.SortUtil; 8Rwk
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/** M&j|5UH%.
* @author treeroot <mE`<-$
* @since 2006-2-2 X n$ZA-
* @version 1.0 R,G*]/r`
*/ :R,M Y"(
public class QuickSort implements SortUtil.Sort{ s:}? rSI
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/* (non-Javadoc) }I&.xzJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZrTB%
*/ ? +L,
public void sort(int[] data) { \]V:>=ry>
quickSort(data,0,data.length-1); qK a}O*
} GYfOwV!zB
private void quickSort(int[] data,int i,int j){ RyJy%|\-S
int pivotIndex=(i+j)/2; O`9c!_lis
//swap );h(D!D,
SortUtil.swap(data,pivotIndex,j); 3NgXM
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int k=partition(data,i-1,j,data[j]); Bi:lC5d5?
SortUtil.swap(data,k,j); din,yHu~
if((k-i)>1) quickSort(data,i,k-1); ?b,>+v-w::
if((j-k)>1) quickSort(data,k+1,j); 3T)rJEN A
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/** J+`aj8_ B
* @param data ixu*@{<Z(
* @param i y|}~"^+T
* @param j $]We |
* @return yov~'S9
*/ ^
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private int partition(int[] data, int l, int r,int pivot) { 2+gbMd4n
do{ p H y
while(data[++l] while((r!=0)&&data[--r]>pivot); C7FQc{
SortUtil.swap(data,l,r); y4Jc|)
} Cy]=Y
while(l SortUtil.swap(data,l,r); js<d"m*
return l; @gD)pH
} dtC@cK/,D
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} wQ/* f9
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改进后的快速排序: sgp.;h'
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package org.rut.util.algorithm.support; WR)=VE
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import org.rut.util.algorithm.SortUtil; &J6`Q<U!
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/** /l*v *tl
* @author treeroot ^HSxE
* @since 2006-2-2 @.e X8~3=
* @version 1.0 R&Y_
*/ <
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public class ImprovedQuickSort implements SortUtil.Sort { HY)xT$/J
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private static int MAX_STACK_SIZE=4096; [tpiU'/Zl
private static int THRESHOLD=10; pbzFzLal
/* (non-Javadoc) 8}B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W`;;fJe
*/ kh
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public void sort(int[] data) { 8)X9abC
int[] stack=new int[MAX_STACK_SIZE]; c* {6T}VZr
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int top=-1; +.V+@!
int pivot; 9(N
int pivotIndex,l,r; %#x4wi
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stack[++top]=0; 2I-d.{
stack[++top]=data.length-1; o&?c,FwN
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while(top>0){ i.Rl&t
int j=stack[top--]; .11l(M
int i=stack[top--]; &kg^g%%
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pivotIndex=(i+j)/2; kv:9Fm\$
pivot=data[pivotIndex]; 0^ODJ7
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SortUtil.swap(data,pivotIndex,j); kamQZzPe
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//partition SyvoN,;Q
l=i-1; PM\Ju]
r=j; 0|P=S|%~
do{ =0)|psCsM
while(data[++l] while((r!=0)&&(data[--r]>pivot)); mTE(JZt
SortUtil.swap(data,l,r); (C!p2f
} V?u#WJy/
while(l SortUtil.swap(data,l,r); aA`eKy) \
SortUtil.swap(data,l,j); J2=4%#R!
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if((l-i)>THRESHOLD){ GcVQz[E
stack[++top]=i; ]8p{A#1
stack[++top]=l-1; b>07t!;
} v"G1vSx)BT
if((j-l)>THRESHOLD){ y]j.PT`Cw
stack[++top]=l+1; YN8x|DLi?
stack[++top]=j; g&$=Y7G
} 2)f_L|o,m
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} axC|,8~tq
//new InsertSort().sort(data); ,;g%/6X
insertSort(data); P@7>R7gS
} P(D>4/f3"
/** rnIjpc F
* @param data #A/OGi
*/ OyTK,i<n
private void insertSort(int[] data) { +4?Lwp'q
int temp; {iD/0q
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); <]rayUyaf
} tu
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} t+?Bb7p,H
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} l]]NVBA])
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