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快速排序: YMyfL8bO
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package org.rut.util.algorithm.support; Ib!R D/
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import org.rut.util.algorithm.SortUtil; Y Uc+0
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/** gaxsv[W>^
* @author treeroot bP#:Oi0v`
* @since 2006-2-2 Po;W'7"Po`
* @version 1.0 Q} JOU
*/ (Rh,,
public class QuickSort implements SortUtil.Sort{ hag$GX'2k
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/* (non-Javadoc) "{+QW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c]<5zyl"j1
*/ 0o4XUW
public void sort(int[] data) { k'Hs}z eNn
quickSort(data,0,data.length-1); &B;~
} p>N(Typ0b
private void quickSort(int[] data,int i,int j){ *R,5h2;
int pivotIndex=(i+j)/2; `hm-.@f,9
//swap ?<,l3pwqa
SortUtil.swap(data,pivotIndex,j); bs&43Ae
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int k=partition(data,i-1,j,data[j]); dDMJ'
SortUtil.swap(data,k,j); {?0lBfB"
if((k-i)>1) quickSort(data,i,k-1); ]q[D>6_
if((j-k)>1) quickSort(data,k+1,j); i"FtcP^
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} [aLI
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/** @bLy,Xr&
* @param data B@))8.h]
* @param i
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* @param j R^fPIv`q
* @return jd"@t*ZV
*/ J{<X7uB
private int partition(int[] data, int l, int r,int pivot) { T<>,lQs(a
do{ G_tCmu\
while(data[++l] while((r!=0)&&data[--r]>pivot); e{H=dIa+
SortUtil.swap(data,l,r); =I5>$}q_&,
} (L:>\m&NO
while(l SortUtil.swap(data,l,r); n&/
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return l; DfD&)tsMQ
} N>1em!AS
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} H41?/U,{
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改进后的快速排序: Qel9G($=
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package org.rut.util.algorithm.support; BOX2O.Pm
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import org.rut.util.algorithm.SortUtil; Yh7t"=o
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/** Dy&i&5E.-l
* @author treeroot = svN#q5s
* @since 2006-2-2 q<<v,ihh
* @version 1.0 wJqMa9|
*/ o/)h"i0P
public class ImprovedQuickSort implements SortUtil.Sort { JR|ck=tq
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private static int MAX_STACK_SIZE=4096; r;2^#6/Z
private static int THRESHOLD=10; .Hm>i
/* (non-Javadoc) >:!5*E5?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /N.b%M]!
*/ M_f:A
public void sort(int[] data) { r5/0u(\LB
int[] stack=new int[MAX_STACK_SIZE]; T>Z<]s
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int top=-1; t@;p
int pivot; 6MW{,N
int pivotIndex,l,r; !<";cw(q
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stack[++top]=0; D_7,m%Z:
stack[++top]=data.length-1; q2j{tP#
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while(top>0){ Or+U@vAnk
int j=stack[top--]; _[3D
int i=stack[top--]; }X6m:#6
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pivotIndex=(i+j)/2; BO&bmfp7,
pivot=data[pivotIndex]; 3hH<T.@)
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SortUtil.swap(data,pivotIndex,j); #!#
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//partition B9 uoVcW
l=i-1; WH} y"W
r=j; / SB;Von
do{ Y.UFbrv
while(data[++l] while((r!=0)&&(data[--r]>pivot)); e !Y~Qy
SortUtil.swap(data,l,r); tk`v:t!6U
} X_h}J=33Q
while(l SortUtil.swap(data,l,r); ~mxO7cy5Cg
SortUtil.swap(data,l,j); Kc-W&?~y#1
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if((l-i)>THRESHOLD){ * u>\57W
stack[++top]=i; o.!Dq7R
stack[++top]=l-1; M }D}K\)
} 2ilQXy
if((j-l)>THRESHOLD){ vE?G7%,
stack[++top]=l+1; HV|,}Wks6s
stack[++top]=j; 6{b>p+U
} t~XN}gMxw
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} oPM96
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//new InsertSort().sort(data); T5h
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insertSort(data); 4[eXe$
} zF<R'XP
/** `;C V=,M
* @param data 5;EvNu
*/ L4HI0Mx
private void insertSort(int[] data) { /4Gt{ygSr
int temp; jLluj
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); R/YqyT\SM
} 4B.*g-L
} :o3N;*o>)0
} VPo".BvG6
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} rILYI;'o
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