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快速排序: D"5~-9<
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package org.rut.util.algorithm.support; S@-X?Lu
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import org.rut.util.algorithm.SortUtil; ]HT>-Ba;{h
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/** dU n#'<g5
* @author treeroot @cNI|T
* @since 2006-2-2 @},k\Is
* @version 1.0 L6qA=b~iz
*/ T8
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public class QuickSort implements SortUtil.Sort{ WG4|Jf Y
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/* (non-Javadoc) l%/,Ef*3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $"1&!
*/ U?yXTMD
public void sort(int[] data) { u{G6xuPWf
quickSort(data,0,data.length-1); '11h Iu=:
} Hb4rpAeP
private void quickSort(int[] data,int i,int j){ (b!DJ;(O9
int pivotIndex=(i+j)/2; BtZm_SeA
//swap -ZJ:<
SortUtil.swap(data,pivotIndex,j); gRSG[GMV
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int k=partition(data,i-1,j,data[j]); 5@5="lNjS
SortUtil.swap(data,k,j); N`fY%"5U>
if((k-i)>1) quickSort(data,i,k-1); Fd'L:A~
if((j-k)>1) quickSort(data,k+1,j); <h0ptCB
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} Rvo<ISp
/** 8yl/!O,v
* @param data tJ3s#q6
* @param i 2Z |kf9
* @param j |3@]5f&
* @return [r'M_foga*
*/ B9\o:eY
private int partition(int[] data, int l, int r,int pivot) { $R4\jIewV
do{ ,pepr9Yd
while(data[++l] while((r!=0)&&data[--r]>pivot); 4f5$^uN$qA
SortUtil.swap(data,l,r); ttrp|(
} hG)lVo!L4j
while(l SortUtil.swap(data,l,r); euK!JZ
return l; UzXbaQQ2g
} g`8|jg0]`I
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} beoMLHp
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改进后的快速排序: }o.ZCACYg
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package org.rut.util.algorithm.support; CPG %*E*
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import org.rut.util.algorithm.SortUtil; 9G9lSj5>
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/** zvWQ&?&o2
* @author treeroot =?hlgQ
* @since 2006-2-2 #'oKkrl
* @version 1.0 [g_@<?zg
*/ 7)#/I
public class ImprovedQuickSort implements SortUtil.Sort { 4B]a8
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private static int MAX_STACK_SIZE=4096; -Zh+5;8g
private static int THRESHOLD=10; Qfi5fp=f
/* (non-Javadoc) *']RYu?X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @ck2j3J/
*/ 6dp~19T^
public void sort(int[] data) { LV0{~g(!%
int[] stack=new int[MAX_STACK_SIZE]; *lSIT]1
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int top=-1; `P~RG.HO
int pivot; nq;)!Wry
int pivotIndex,l,r; ,58[WZG
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stack[++top]=0; tuSgh!
stack[++top]=data.length-1; `,O^=HBM
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while(top>0){ s zg1.&
int j=stack[top--]; rO~D{)Nu
int i=stack[top--]; t30V_`eQ
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pivotIndex=(i+j)/2; t Ks0]8tc
pivot=data[pivotIndex]; mB\|<2
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SortUtil.swap(data,pivotIndex,j); qeYr= %)c
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//partition vL7}0n>tz
l=i-1; 5+r#]^eQY-
r=j; !p2&$s"N.
do{ n8Fi?/
while(data[++l] while((r!=0)&&(data[--r]>pivot)); -e ya$C
SortUtil.swap(data,l,r); 4^5s\f B
} {+MMqJCa
while(l SortUtil.swap(data,l,r); \BDNF<_
SortUtil.swap(data,l,j); ]_h"2|
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if((l-i)>THRESHOLD){ 4 ET
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stack[++top]=i; In
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stack[++top]=l-1; K67x.P Z
} MX34qJ9k
if((j-l)>THRESHOLD){ 0=04:.%D
stack[++top]=l+1; J=sQ].EK
stack[++top]=j; 4_ 3\4
} |@+
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} PHoW|K_e
//new InsertSort().sort(data); $8Zw<aEJ
insertSort(data); Jad'8}0J
} !O\r[c
/** '*pq@|q;t
* @param data {`: !=
*/ R]dB Uu
private void insertSort(int[] data) { laAG%lq/'
int temp; )}R0'QGd
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 2Y,s58F
} @`3)?J[w
} '=r.rW5
} k$zDofdfp
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} 3^Ex_jeB
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