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快速排序: jn._4TQ*}
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package org.rut.util.algorithm.support; 7*(K%e"U
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import org.rut.util.algorithm.SortUtil; !n`Y^
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/** n _eN|m?@
* @author treeroot ftRzgW);
* @since 2006-2-2 s0/y> ok
* @version 1.0 Q7(I'
*/ 'tJ@+(tqw
public class QuickSort implements SortUtil.Sort{ vC%Hc/&.}
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/* (non-Javadoc) I!u fw\[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bF c
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*/ ve*m\DU
public void sort(int[] data) { &d@N3y
quickSort(data,0,data.length-1); O)D+u@RhH
} @,;VMO
private void quickSort(int[] data,int i,int j){ KvNw'3Ua
int pivotIndex=(i+j)/2; gV;9lpZ2
//swap H|s,;1#
SortUtil.swap(data,pivotIndex,j); 5NN`tv
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int k=partition(data,i-1,j,data[j]); 7CSd}@71\
SortUtil.swap(data,k,j); (
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if((k-i)>1) quickSort(data,i,k-1); zw}Wm4OH
if((j-k)>1) quickSort(data,k+1,j); a]t| /Mq
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} '"]QAj?N
/** B
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* @param data j%Wip j;c
* @param i m:]60koz]o
* @param j dw3H9(-lp
* @return `s~[q
*/ u$
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private int partition(int[] data, int l, int r,int pivot) { ';KZ.D
do{ !Nx'4N`&l
while(data[++l] while((r!=0)&&data[--r]>pivot); DlxL:
SortUtil.swap(data,l,r); Ybp';8V
} pe>[Ts`2F
while(l SortUtil.swap(data,l,r); &b=OT%D~FU
return l; Z>_F:1x
} M&5De{LS}
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} ;bYLQ
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改进后的快速排序: cb`ik)=K%
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package org.rut.util.algorithm.support; -jcgxQH53
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import org.rut.util.algorithm.SortUtil; 9e0t
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/** 4N_iHe5U
* @author treeroot g$^I/OK?
* @since 2006-2-2 U^d!*9R
* @version 1.0 ?7\$zn)v#
*/ *5q_fO
public class ImprovedQuickSort implements SortUtil.Sort { w~Jy,[@n
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private static int MAX_STACK_SIZE=4096; ?^!:
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private static int THRESHOLD=10; WNo< 0|X
/* (non-Javadoc) sO0j!;N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^9
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*/ b9"HTQHl
public void sort(int[] data) { MBO>.M$B
int[] stack=new int[MAX_STACK_SIZE]; VZCCMh-
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int top=-1; yN9setw*,M
int pivot; a"whg~
int pivotIndex,l,r; e8VtKVcY
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stack[++top]=0; |s, Add:S
stack[++top]=data.length-1; j[Oh>yG
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while(top>0){ aJSBG|IC
int j=stack[top--]; 9
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int i=stack[top--]; ]Aa.=
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pivotIndex=(i+j)/2; baz~luM
pivot=data[pivotIndex]; v|GDPq
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SortUtil.swap(data,pivotIndex,j); y9X1X{
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//partition ^8{:RiN6e~
l=i-1; i~uoK7o|G
r=j; ]=jpqxlx
do{ 0`
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while(data[++l] while((r!=0)&&(data[--r]>pivot)); DW0UcLO
SortUtil.swap(data,l,r); DRmN+2I
} 1LonYAHF
while(l SortUtil.swap(data,l,r); iU "{8K,
SortUtil.swap(data,l,j); %-#rzeaW
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if((l-i)>THRESHOLD){ ER)to<k
stack[++top]=i; V J]S"
stack[++top]=l-1; SEsLJ?Dv0
} _>(qQ-Px
if((j-l)>THRESHOLD){ |5#iPw_wMY
stack[++top]=l+1; #uCE0}N@
stack[++top]=j; !R3ZyZcX
} TY]-L1$
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} A&7~]BR\
//new InsertSort().sort(data); +hzS'z)n&
insertSort(data); %TS8 9/
} EbMG9
/** TY*uK
* @param data @Xl/<S&
*/ V8+8?5'l
private void insertSort(int[] data) { /6nj
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int temp; }TsND6Ws3
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); Is#w=s}2
} ;}QM#5Xdt
} |QxT"`rT
} 3FE=?Q
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} _l$X![@6=
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