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快速排序: @v'D9 ?
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package org.rut.util.algorithm.support; Lr^xp,_ n
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import org.rut.util.algorithm.SortUtil; DG-vTr
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/** %8tN$8P
* @author treeroot vP4Ij
* @since 2006-2-2 KCu6:)6'
* @version 1.0 9e&#;6l
*/ pd1m/:
public class QuickSort implements SortUtil.Sort{ :6/OU9f/R
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/* (non-Javadoc) V[M#qZS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ##_Za6/n
*/ ;40m goN
public void sort(int[] data) { 9O Q4\
quickSort(data,0,data.length-1); Zz-;jkX)
} /RC!Yi
private void quickSort(int[] data,int i,int j){ 9/M!S[N9
int pivotIndex=(i+j)/2; -X[[
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//swap rsv!mY,Em
SortUtil.swap(data,pivotIndex,j); G7;}309s
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int k=partition(data,i-1,j,data[j]); QL2y,?Mz7
SortUtil.swap(data,k,j); ?<?C*W_
if((k-i)>1) quickSort(data,i,k-1); %`1vIr(7
if((j-k)>1) quickSort(data,k+1,j); S7/v,E
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} Nj_sU0Dt
/**
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* @param data "T
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* @param i 1$VI\}
* @param j S1`0d9ds#
* @return .K1E1Z_
*/ 8VmN?"5v
private int partition(int[] data, int l, int r,int pivot) { p.] .M"A
do{ ?1:/
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while(data[++l] while((r!=0)&&data[--r]>pivot); 9sj W
SortUtil.swap(data,l,r); n E0~Y2
} (y=o]Vy
while(l SortUtil.swap(data,l,r); u2BW]T]
return l; TDE1z>h+"
} zZc@;S#
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} (+8xUc(w
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改进后的快速排序: So*Wk "
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package org.rut.util.algorithm.support; ^s~n[
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import org.rut.util.algorithm.SortUtil; yXV|4
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/** *t M7>
* @author treeroot -0o6*?[Z
* @since 2006-2-2 FgQ_a/*
* @version 1.0 QcG5PV
*/ MupW=3.38
public class ImprovedQuickSort implements SortUtil.Sort { n~ >h4=h
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private static int MAX_STACK_SIZE=4096; sp
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private static int THRESHOLD=10; :n4:@L<%H
/* (non-Javadoc) +#uNQ`1v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (d'j'U:C
*/ ;IuK2iDt<
public void sort(int[] data) { yEUNkZ5^
int[] stack=new int[MAX_STACK_SIZE]; b;J0'o^G|
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int top=-1; f;Bfh3
int pivot; a][pTC\ rb
int pivotIndex,l,r; b4)*<Zp`
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stack[++top]=0; s1Tl.p5
stack[++top]=data.length-1; a()6bRc~T
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while(top>0){ 'lN*Ys iDi
int j=stack[top--]; % O&m#)|
int i=stack[top--]; C^,4`OI
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pivotIndex=(i+j)/2; P~\a)Szy
pivot=data[pivotIndex]; +%
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SortUtil.swap(data,pivotIndex,j); rv,NQZ
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//partition :m*!?QGdL
l=i-1; vLBee>$
r=j; @L[PW@:SZ
do{ \[[TlB>
while(data[++l] while((r!=0)&&(data[--r]>pivot)); ^Y{6;FJ
SortUtil.swap(data,l,r); ]g>m? \'n
} Zk/' \(5
while(l SortUtil.swap(data,l,r); '&-5CpDUs
SortUtil.swap(data,l,j); {=bg5I0|a
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if((l-i)>THRESHOLD){ g[EM]q,
stack[++top]=i; k5aa>6K
stack[++top]=l-1; I|KY+k> /
} q GpP,
if((j-l)>THRESHOLD){ !,? <zg
stack[++top]=l+1; [$( sUc(%
stack[++top]=j; Rwc[:6;fn
} "x#]i aDjf
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} k9}Q7) @
//new InsertSort().sort(data); KInUe(g<9M
insertSort(data); ZnvEv;P
} pqyWv;
/** .'t (-eT,
* @param data :3KO6/+
*/ 6=ZRn gQ
private void insertSort(int[] data) { M82.khm~jM
int temp; S}oG.r
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for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); VHXI@UT*
} >_;kT y,
} K\RWC4
} On#;)35M
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} F&=I7i
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