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快速排序: 1-uxC^u?|#
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package org.rut.util.algorithm.support; ?=7cF
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import org.rut.util.algorithm.SortUtil; s c,Hq\$&
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/** (,\+tr8r8
* @author treeroot `?rSlR@+[I
* @since 2006-2-2 U}[d_f
* @version 1.0 NNR`!Pty
*/ qr^3R&z!}
public class QuickSort implements SortUtil.Sort{ xt*
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/* (non-Javadoc) {]!mrAjD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f}ji?p
*/ \)904W5R
public void sort(int[] data) { ah&D%8E
quickSort(data,0,data.length-1); Sv#XIMw{,
} XEp{VC@=
private void quickSort(int[] data,int i,int j){ [!uG1 GJ>
int pivotIndex=(i+j)/2; U$.@]F4&
//swap oulVg];
SortUtil.swap(data,pivotIndex,j); %XDc,AR[
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int k=partition(data,i-1,j,data[j]); P )"m0Lu<
SortUtil.swap(data,k,j); 2;`1h[,-^
if((k-i)>1) quickSort(data,i,k-1); b5I I/Y
if((j-k)>1) quickSort(data,k+1,j); )9G[dDeC
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} 6<SAa#@ey
/** %lhEM}Sm
* @param data c|y(2K)o[=
* @param i /{l$sBUL
* @param j }OR@~V{Gj
* @return G6P?2@
*/ H5B:;g@
private int partition(int[] data, int l, int r,int pivot) { iC32nY?
do{ ^ogt+6c
while(data[++l] while((r!=0)&&data[--r]>pivot); GW@;}m(
SortUtil.swap(data,l,r); iN\4gQ!
} N,AQsloL7
while(l SortUtil.swap(data,l,r); D,*3w'X!K
return l; rQs)O<jl
} 8 +/rlHp
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} iRbT/cc{
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改进后的快速排序: _ QI\
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package org.rut.util.algorithm.support; G@\1E+Ip
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import org.rut.util.algorithm.SortUtil; / }X1W
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/** K`WywH3-
* @author treeroot Wx}8T[A}
* @since 2006-2-2 ;(/ZO%h
* @version 1.0 u;"TTN
*/ DB|Y
public class ImprovedQuickSort implements SortUtil.Sort { \)N9aV
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private static int MAX_STACK_SIZE=4096; jl$ece5v
private static int THRESHOLD=10; A]0
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/* (non-Javadoc) K~{$oD7!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AaOuL,l
*/ *uf'zQ<9
public void sort(int[] data) { 8 &LQzwa
int[] stack=new int[MAX_STACK_SIZE]; +b<FO+E_
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int top=-1; A*2jENgci
int pivot; 7M!I8C0!aO
int pivotIndex,l,r; HxV=F66"
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stack[++top]=0; Y@vTaE^w3
stack[++top]=data.length-1; Nq[uoaT
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while(top>0){ C*_C;6.~Y
int j=stack[top--]; w^|*m/h|@u
int i=stack[top--]; !4RWYMV"
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pivotIndex=(i+j)/2; Y0@"fU35
pivot=data[pivotIndex]; GqvpA#
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SortUtil.swap(data,pivotIndex,j); zuad~%D<I
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//partition XbKYiy
l=i-1; r&JgLC(
r=j; 4y?n
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do{ u(>^3PJ+
while(data[++l] while((r!=0)&&(data[--r]>pivot)); p!7FpxZY
SortUtil.swap(data,l,r); XB^'K2
} Vpz\.]
while(l SortUtil.swap(data,l,r); <I\/n<*
SortUtil.swap(data,l,j); Uw. `7b>B
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if((l-i)>THRESHOLD){ QUc= &5 %
stack[++top]=i; <4si/=
stack[++top]=l-1; rdP[<Y9
} 4{U T!WIi
if((j-l)>THRESHOLD){ v5#jZ$<F
stack[++top]=l+1; uM IIYS
stack[++top]=j; ThajHK|U
} t7Iv?5]N
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} v6bGjVK[
//new InsertSort().sort(data); XkE`U5.
insertSort(data); JV^=v@Z3
} rNWw?_H-H(
/** 5h=}j
* @param data %~H-)_d20
*/ ?}tFN_X"
private void insertSort(int[] data) { kW Ml
int temp; p
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for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); x_N'TjS^{
} (l~AV9!m:
} RUnSC OdX
} _?m(V=z>
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} x:NY\._
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