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快速排序: ),53(=/hl
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package org.rut.util.algorithm.support; a3?D@@Qnw
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import org.rut.util.algorithm.SortUtil; 1w|C+m/(
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/** [l%6wIP&{
* @author treeroot -w#*~Q{'*
* @since 2006-2-2 XzV:q!e-
* @version 1.0 p.50BcDg
*/ ?r"QJa>
public class QuickSort implements SortUtil.Sort{ vD@=V#T
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/* (non-Javadoc) }63Qh}_Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0S}ogU[k
*/ ^w1&A3=6
public void sort(int[] data) { +*AdSzX
quickSort(data,0,data.length-1); `N.^+Mvx-
} 8kA2.pIk
private void quickSort(int[] data,int i,int j){ (|kcSnF0
int pivotIndex=(i+j)/2; 2$OI(7b=
//swap _t'S<jTI
SortUtil.swap(data,pivotIndex,j); rm"C|T4:V
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int k=partition(data,i-1,j,data[j]); qzbpLV|
SortUtil.swap(data,k,j); R_|Sg
if((k-i)>1) quickSort(data,i,k-1); EJ&aT etQ
if((j-k)>1) quickSort(data,k+1,j); X4z6#S58
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} F
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/** byrK``f
* @param data { t1|6R0
* @param i R<-u`uXnP
* @param j hnf7Q l}
* @return F4T}HY>nZ
*/ d \[cFe1d
private int partition(int[] data, int l, int r,int pivot) { ,k=1'7d
do{ Yc]
while(data[++l] while((r!=0)&&data[--r]>pivot); G,]%dZHe
SortUtil.swap(data,l,r); S="teH[
} miCW(mbO8
while(l SortUtil.swap(data,l,r); g~#HiBgWq[
return l; V <;vy&&
} PRo;NE
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} U!xOJ
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改进后的快速排序: n@
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package org.rut.util.algorithm.support; tOQura
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import org.rut.util.algorithm.SortUtil; O,>`#?
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/** (w+dB8)X
* @author treeroot K@DK4{
* @since 2006-2-2 vI)-Zz[3
* @version 1.0 `VB]4i}u
*/ fsr0E=nV
public class ImprovedQuickSort implements SortUtil.Sort { }>|!Mf]W?R
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private static int MAX_STACK_SIZE=4096; Ie14`'
private static int THRESHOLD=10; w)u6J,
/* (non-Javadoc) JC[G5$E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/ r'C(+E (
public void sort(int[] data) { 5/m^9@A
int[] stack=new int[MAX_STACK_SIZE]; 6,D)o/_
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int top=-1; fNkN
int pivot; j!oD9&W4~
int pivotIndex,l,r; G{8>
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stack[++top]=0;
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stack[++top]=data.length-1; GdxMHnn=
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while(top>0){ :W++`f&
int j=stack[top--]; g'F{;Ur
int i=stack[top--]; $d[ xSwang
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pivotIndex=(i+j)/2; ~S='~ g)
pivot=data[pivotIndex]; 9w%|Nk>=>
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SortUtil.swap(data,pivotIndex,j); tmCm54
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//partition KG5h$eM'
l=i-1; [J6*Q9B<V&
r=j; WrS|$: 0
do{ r-ldqj
while(data[++l] while((r!=0)&&(data[--r]>pivot)); g7-=kmr|V
SortUtil.swap(data,l,r); iyRB}[y
} K1F,M9 0]
while(l SortUtil.swap(data,l,r); 2`-y zm
SortUtil.swap(data,l,j); vw'`t6
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if((l-i)>THRESHOLD){ 7:Jyu/*]
stack[++top]=i; 41d,<E
stack[++top]=l-1; Mk*&CNo3
} /Ww_fY
if((j-l)>THRESHOLD){ q
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stack[++top]=l+1; N<xf=a+j
stack[++top]=j; fCA/
} X CjYm
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} *acN/Ca1
//new InsertSort().sort(data); }WN0L?h.E
insertSort(data); tPT\uD#t
} GYx_9"J\5
/** y5X HJUTu
* @param data rt7Ma2tK
*/ 9Yh0'
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private void insertSort(int[] data) { QFI8|i@
int temp; Pgy&/-u
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); H?dmNwkPY
} _L6WbRu|
} Wp0e?bK_
} GP%83T
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} 5$r`e+Nf'
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