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快速排序: TPak,h(1
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package org.rut.util.algorithm.support; BRM!g9
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import org.rut.util.algorithm.SortUtil; DuIXv7"[
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/** NFKvgd@
* @author treeroot /bPs0>5
* @since 2006-2-2
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* @version 1.0 9C0#K\
*/ +.OdrvN4)
public class QuickSort implements SortUtil.Sort{ $L?KNXHAF!
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/* (non-Javadoc) ivyaGAF}+o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RBBmGZ
*/ lk[Y6yE
public void sort(int[] data) { R<(xWH
quickSort(data,0,data.length-1); h72CGA|
} Z*Gf`d:
private void quickSort(int[] data,int i,int j){ C,GZ
int pivotIndex=(i+j)/2; n.z,-H17
//swap PB?2{Cj
SortUtil.swap(data,pivotIndex,j); Gh@~~\
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int k=partition(data,i-1,j,data[j]); -; J6S
SortUtil.swap(data,k,j); Poa&htxe1
if((k-i)>1) quickSort(data,i,k-1); `E?0jQ
if((j-k)>1) quickSort(data,k+1,j); YRFz]
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} $/B~ bJC
/**
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* @param data ,v,rY'
* @param i XM,slQ
* @param j OZnKJ<
* @return [uLsM<C
*/ q=V'pML
private int partition(int[] data, int l, int r,int pivot) { [.1MElM
do{ nosD1sS.K8
while(data[++l] while((r!=0)&&data[--r]>pivot); e}S+1G6r)
SortUtil.swap(data,l,r); LO>42o?/i
} / of K7/
while(l SortUtil.swap(data,l,r); TlRc8r|
return l; }v4dOGc?
} q!?*M?Oz
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} ?%}!_F`h%
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改进后的快速排序: J}:.I>
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package org.rut.util.algorithm.support; +a1iZ bh
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import org.rut.util.algorithm.SortUtil; #mA(x@:*
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/** ;%B9mM#p~
* @author treeroot 9|#cjHf
* @since 2006-2-2
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* @version 1.0 2R.LLE
*/ ~"CGur P
public class ImprovedQuickSort implements SortUtil.Sort { VL$
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private static int MAX_STACK_SIZE=4096; \'4~@
private static int THRESHOLD=10; ,1$F#Eh
/* (non-Javadoc) ]MosiMJF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;ryNfP%
*/ tmooS7\a
public void sort(int[] data) { U/QgO
int[] stack=new int[MAX_STACK_SIZE]; o1x1SH
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int top=-1; qul#)HI
int pivot; I}3F'}JV<
int pivotIndex,l,r; dQ.#8o=
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stack[++top]=0; g-~ _gt7
stack[++top]=data.length-1; ]f0'YLG
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while(top>0){ ,0. kg
int j=stack[top--]; czuIs|_K*
int i=stack[top--]; [ 49Cvde^
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pivotIndex=(i+j)/2; VNHceH
pivot=data[pivotIndex]; 7|DG1p9C
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SortUtil.swap(data,pivotIndex,j); 9Yv:6@. F
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//partition !m+Pd.4TaB
l=i-1; :_~.Nt
r=j; ir_XU/ve
do{ 'z(Y9%+a
while(data[++l] while((r!=0)&&(data[--r]>pivot)); 3SP";3+
SortUtil.swap(data,l,r); O -1O@:}c
} A iM ukd,
while(l SortUtil.swap(data,l,r); $Es\ld
SortUtil.swap(data,l,j); 10Ik_L='
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if((l-i)>THRESHOLD){ b0{i +R
stack[++top]=i; &*=!B9OBI
stack[++top]=l-1; ew~Z/ A
} ~oa}gJl:}-
if((j-l)>THRESHOLD){ CO='[1"_5
stack[++top]=l+1; o utJ/~9;
stack[++top]=j; $nO~A7
} 7~e,"^>T
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} H9/!oI1P?
//new InsertSort().sort(data); ^ `y7JXI:
insertSort(data); J:yv82
} =:gKh
/** | ys5.|
* @param data ^l!SIu
*/ cag 5w~Px
private void insertSort(int[] data) { ("2X8(3z
int temp; mqZH<.mn
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ,a?)O6?/
} tOiz tYu
} >GGM76vB=,
} j=l2\W#}
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} >^s2$@J?p
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