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快速排序: K[
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package org.rut.util.algorithm.support; fm`V 2'Rm
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import org.rut.util.algorithm.SortUtil; 01n132k
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/** ggiy{CdR
* @author treeroot oP9 y@U
* @since 2006-2-2 ?Pp*BB,*y
* @version 1.0 IVkB)9IW
*/ pf107S
public class QuickSort implements SortUtil.Sort{ ]@b9m
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/* (non-Javadoc) $B_%MfI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gua7<z6=eh
*/ (ie%zrhS
public void sort(int[] data) { P.5l9Ns(O
quickSort(data,0,data.length-1); jU7[z$GX
} * Ogf6
private void quickSort(int[] data,int i,int j){ ,a,2I
int pivotIndex=(i+j)/2; )5LT!14
//swap 6_])(F3+w.
SortUtil.swap(data,pivotIndex,j); y(MB_B7j
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int k=partition(data,i-1,j,data[j]); ,ofE*Wt
SortUtil.swap(data,k,j); -egnMc67
if((k-i)>1) quickSort(data,i,k-1); DyCzRkH
if((j-k)>1) quickSort(data,k+1,j); R y#C#0
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} ~59lkr8
/** ooUVVp
* @param data JO0o@M5H
* @param i E:ci/09wD
* @param j Ul9^"o
* @return K%+4M#jj5
*/ W dD889\
private int partition(int[] data, int l, int r,int pivot) { oKCy,Ot<
do{ /\b*
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while(data[++l] while((r!=0)&&data[--r]>pivot); *jbPy?%oY
SortUtil.swap(data,l,r);
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} N`,\1hHMT
while(l SortUtil.swap(data,l,r); ;Tp9)UP)
return l; `6J7c;:
} (lVMy\
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} $x+7.%1m)~
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改进后的快速排序: y|KQ`;
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package org.rut.util.algorithm.support; g:a[N%[C
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import org.rut.util.algorithm.SortUtil; ;"x+V gS'
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/** l^nvwm`f#:
* @author treeroot B K+P
* @since 2006-2-2 9N'fU),I
* @version 1.0 2=n`z)R
*/ [B+F}Q^;
public class ImprovedQuickSort implements SortUtil.Sort { 1x;@BV
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private static int MAX_STACK_SIZE=4096; Se'SDJl=
private static int THRESHOLD=10; 4n6AK`E
/* (non-Javadoc) =<3HOOC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &RARK8^
*/ xS tsw5d
public void sort(int[] data) { 9QXsbd6
int[] stack=new int[MAX_STACK_SIZE]; ]"uG04"Vk
*>:phs~r{
int top=-1; GZu12\0nZ
int pivot; .=J- !{z
int pivotIndex,l,r; ocW~I3
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stack[++top]=0; 7;AK=;
stack[++top]=data.length-1; I V#8W
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while(top>0){ .Iqqjk
int j=stack[top--]; xm1di@
int i=stack[top--]; pXO09L/nv
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pivotIndex=(i+j)/2; Lk,q~
pivot=data[pivotIndex]; SDO:Gma
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SortUtil.swap(data,pivotIndex,j); te-xhJ&K
+] ;WN
//partition 6`Tx meIP
l=i-1; 3=sBe HL
r=j; 3`%E;?2
do{ %'s_=r`
while(data[++l] while((r!=0)&&(data[--r]>pivot)); CO@G%1#
SortUtil.swap(data,l,r); YZ+G7D>
} AZc=Bbh
while(l SortUtil.swap(data,l,r); By8SRWs
SortUtil.swap(data,l,j); ;!S5P(
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if((l-i)>THRESHOLD){ 2K};-}eW
stack[++top]=i; <hCO-r#
stack[++top]=l-1; n]$rLm%^
} VtI`Qcjc
if((j-l)>THRESHOLD){ [(x*!,=
stack[++top]=l+1; {:!>Y1w>
stack[++top]=j; M9R'ONYAa
} 9gw;MFP)D
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} uc@4fn
//new InsertSort().sort(data); ^.8~}TT-U
insertSort(data); sk3 9[9
} OS@uGp=
/** ]dNNw`1\V
* @param data I*.nwV<
*/ U[x$QG6 m!
private void insertSort(int[] data) { .cJoNl'q
int temp; tW|0_m>{
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); B;(U?gC
} 1Y $%| `
} 9n\>Yieu
} Jk(V ]
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} w6!97x
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