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快速排序: azs lNL
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package org.rut.util.algorithm.support; [%0{7pz}
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import org.rut.util.algorithm.SortUtil; g3Xa b
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/** #`HY"-7m_
* @author treeroot 9a6ij*#
* @since 2006-2-2 8opd0'SNaB
* @version 1.0 rWP
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*/ 18HmS>Qo
public class QuickSort implements SortUtil.Sort{ !y$:}W?_
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/* (non-Javadoc) cXd?48O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ee}HQ.}Ja
*/ up@I,9C/
public void sort(int[] data) { 8PB 8h
quickSort(data,0,data.length-1); L0Ycf|[s,
} +W%3VV$
private void quickSort(int[] data,int i,int j){ *el~sor;S
int pivotIndex=(i+j)/2; {!L25
//swap NimW=X;c
SortUtil.swap(data,pivotIndex,j); G<$N*3
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int k=partition(data,i-1,j,data[j]); XkEJ_;:
SortUtil.swap(data,k,j); joRrsxFU
if((k-i)>1) quickSort(data,i,k-1); +%~/~1
if((j-k)>1) quickSort(data,k+1,j); q:/3uC7
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} W5^<4Ya!
/** *U mWcFoF
* @param data zR!p-7_w
* @param i <k'%rz
* @param j uxOeD%Z>
* @return &)$}Nk
*/ ?;YymD_
private int partition(int[] data, int l, int r,int pivot) { MS~+P'
do{ (M-Wea!q
while(data[++l] while((r!=0)&&data[--r]>pivot); ln2lFfz
SortUtil.swap(data,l,r); %K[u
} qRcY(mb
while(l SortUtil.swap(data,l,r); Q
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return l; JQ%D6b
} 7C>5XyyJ
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} YAsE,M+
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改进后的快速排序: TF%MO\!
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package org.rut.util.algorithm.support; V#,jUH|
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import org.rut.util.algorithm.SortUtil; >+FaPym
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/** M(Tlkr
* @author treeroot 'JRYf;9c
* @since 2006-2-2 T^DJ/uhd
* @version 1.0 m#,AD,s
*/ E;bv;RUio
public class ImprovedQuickSort implements SortUtil.Sort { u Wxl\+_i
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private static int MAX_STACK_SIZE=4096; mHF?t.y
private static int THRESHOLD=10; /Y`u4G()
/* (non-Javadoc) %F}i2!\<L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l<)k`lrMX4
*/ od-yVE&
public void sort(int[] data) { hd1aNaF-
int[] stack=new int[MAX_STACK_SIZE]; l3:2f-H
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int top=-1; !Z!X]F-fY
int pivot; j[${h,p?
int pivotIndex,l,r; -d4|EtN
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stack[++top]=0; 928uGo5
stack[++top]=data.length-1; ".7\>8A#a
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while(top>0){ Pk{%2\%&2
int j=stack[top--]; 61W[
int i=stack[top--]; ^N&@7s
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pivotIndex=(i+j)/2; WD >z
pivot=data[pivotIndex]; UBWUq
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SortUtil.swap(data,pivotIndex,j); `kYcTFk
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//partition )wNcz~
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l=i-1; (3? W)i
r=j; n.7-$1
do{ >zo_ }A!
while(data[++l] while((r!=0)&&(data[--r]>pivot)); rlQ=rNrG&E
SortUtil.swap(data,l,r); wE3fKG.
} LUzn7FZk
while(l SortUtil.swap(data,l,r); hjq@.5
SortUtil.swap(data,l,j); *t300`x
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if((l-i)>THRESHOLD){ 6E{(_i
stack[++top]=i; O?t49=uB}
stack[++top]=l-1; 9/JBn
} Wi@YJ
if((j-l)>THRESHOLD){ Vr:`?V9Q2(
stack[++top]=l+1; I+/fX0-Lib
stack[++top]=j; :E.T2na
} ;;K
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} qH(HcsgD
//new InsertSort().sort(data); 8?LHYdJ
insertSort(data); @xeJ$
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} E5yn,-GyE0
/** `>&K=C?
* @param data 8`z
*/ U&W/Nj
private void insertSort(int[] data) { snYyxi
int temp; j@R"AP}
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); * .g[vCy
} @a i2A|
} 9y*2AaxW
} 5KTPlqm0qF
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} { u3giB
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