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快速排序: YSMAd-Ef-
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package org.rut.util.algorithm.support; )7@0[>
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import org.rut.util.algorithm.SortUtil; "@kaHIf[
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/** 3`HV(5U[
* @author treeroot gw(z1L5
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* @since 2006-2-2 K3C <{#r
* @version 1.0 <@}9Bid!o
*/ al0L&z\
public class QuickSort implements SortUtil.Sort{ jIyQ]:* p
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/* (non-Javadoc) nN;u,}e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zs;JJk^
*/ a*;b^Ze`v
public void sort(int[] data) { ?2a $*(
quickSort(data,0,data.length-1); /reX{Y
} u2I Cl
private void quickSort(int[] data,int i,int j){ BUFv|z+H
int pivotIndex=(i+j)/2; =a!=2VN9y
//swap & kIFcd@
SortUtil.swap(data,pivotIndex,j); }u|q0>^8
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int k=partition(data,i-1,j,data[j]); 6*?F @D2&
SortUtil.swap(data,k,j); $>gFf}#C
if((k-i)>1) quickSort(data,i,k-1); E^PB)D(.
if((j-k)>1) quickSort(data,k+1,j); i4Jc.8^9$
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} 8t`?#8D}
/** 0x7'^Z>-oe
* @param data $kgVa^
* @param i e!`i3KYn"
* @param j !k%#R4*>
* @return <{pz<io)
*/ ijcm2FJcG
private int partition(int[] data, int l, int r,int pivot) { c,22*.V/
do{ zi:BF60]=
while(data[++l] while((r!=0)&&data[--r]>pivot); ax2B ]L2
SortUtil.swap(data,l,r); ]Dzlp7Y}
} -di o5a
while(l SortUtil.swap(data,l,r); mmsPLv6
return l; VL^EHb7
} d _
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改进后的快速排序: BY*Q_Et
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package org.rut.util.algorithm.support; v<;Md-<
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import org.rut.util.algorithm.SortUtil; 'S~5"6r
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/** *=n:-
* @author treeroot l~.-e^p?
* @since 2006-2-2 JRFtsio*
* @version 1.0 )+M0Y_r
*/ g>sSS8RO
public class ImprovedQuickSort implements SortUtil.Sort { z2c6T.1M
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private static int MAX_STACK_SIZE=4096; ddo#P%sH'
private static int THRESHOLD=10; BHw, 4#F1;
/* (non-Javadoc) -/k 3a*$/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &~!Wym
*/ }%z
public void sort(int[] data) { aT<q=DO
int[] stack=new int[MAX_STACK_SIZE]; "ta x?
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int top=-1; jal-9NV)!
int pivot; HThcn1u~^b
int pivotIndex,l,r; J;%Xfx]
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stack[++top]=0; G`zm@QL
stack[++top]=data.length-1; .2pK.$.
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while(top>0){ $"&JWT!#
int j=stack[top--]; {)"vN(mX
int i=stack[top--]; xpI wrJO
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pivotIndex=(i+j)/2; {T8Kk)L
pivot=data[pivotIndex]; @KA4N`
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SortUtil.swap(data,pivotIndex,j); S$k&vc(0
+{>=^9%X
//partition K>9 ()XT)
l=i-1; fatf*}eln
r=j; >MK98(F
do{ 9Ee'Cm
while(data[++l] while((r!=0)&&(data[--r]>pivot)); sr}E+qf
SortUtil.swap(data,l,r); H1T.(M/"
} 6Iw\c
while(l SortUtil.swap(data,l,r); TKjFp%
SortUtil.swap(data,l,j); ~4"dweu?
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if((l-i)>THRESHOLD){ !wp3!bLp
stack[++top]=i; <1pEwI~
stack[++top]=l-1; }i2V.tVB-
} E e]-qN*8
if((j-l)>THRESHOLD){ B;WCTMy}
stack[++top]=l+1; KU;9}!#
stack[++top]=j; _FEFx
} L]Mo;kT<Q
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} 2[CdZ(k]5
//new InsertSort().sort(data); iO[<1?
insertSort(data); I l.K"ll
} >f'g0g
/** Ve=b16H
* @param data %bfZn9_m
*/ 'n|5ZhXPB
private void insertSort(int[] data) { 6^Sa;
int temp; kN>!2UfNS
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); `"~%bS
} QM]YJr3rE
} @P"p+
} T)})
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} ipILG4
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