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快速排序: 7Fb!;W#X
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package org.rut.util.algorithm.support; >bO}sx1?
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import org.rut.util.algorithm.SortUtil; =feVT2*
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/** G49`a*Jn
* @author treeroot !4$o*{9Lx:
* @since 2006-2-2 e\*N Lj_(
* @version 1.0 S3c%</'
*/ 0F&(}`V
public class QuickSort implements SortUtil.Sort{ `2HNQiK'@
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/* (non-Javadoc) DM(c :+K-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^X:g C9
*/ sHSg _/|
public void sort(int[] data) { 5hlS2fn
quickSort(data,0,data.length-1); N_VWA.JHt
} @4]dv> Z
private void quickSort(int[] data,int i,int j){ #/hXcF
int pivotIndex=(i+j)/2; IBh?vh
//swap )hfI,9I~
SortUtil.swap(data,pivotIndex,j); B+ZhQW
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int k=partition(data,i-1,j,data[j]); bp P3#~
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SortUtil.swap(data,k,j); -{$L`{|G
if((k-i)>1) quickSort(data,i,k-1); ,mt=)Ac
if((j-k)>1) quickSort(data,k+1,j); "Y=4Y;5q
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} ;!H]&2`'(
/** r+i=P_p
* @param data &^B;1ZMHD
* @param i .wQM_RZJ
* @param j >WY\P4)k
* @return z3yAb"1Hg
*/ ,T+.xB;Q@
private int partition(int[] data, int l, int r,int pivot) { [|L~" BB
do{ v)v`896S`
while(data[++l] while((r!=0)&&data[--r]>pivot); j[:Iu#VR
SortUtil.swap(data,l,r); &W>%E!F
} @dvb%A&Pur
while(l SortUtil.swap(data,l,r); .;;:t0PB
return l; s{0c.M
} XILreATK@
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} :g)`V4%
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改进后的快速排序: L#u!T)!zW
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package org.rut.util.algorithm.support; aByd,uSe)_
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import org.rut.util.algorithm.SortUtil; 7JLjA\k
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/** h09fU5l
* @author treeroot S&Sa~Oq<o
* @since 2006-2-2 KhNOxMZ
* @version 1.0 -Dr)+Y
*/ aq.Lnbi/X
public class ImprovedQuickSort implements SortUtil.Sort {
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private static int MAX_STACK_SIZE=4096; E~c>LF_]Q
private static int THRESHOLD=10;
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/* (non-Javadoc) RjGJfN{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &MP +
*/ T^
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public void sort(int[] data) { rL6Y4u0e%
int[] stack=new int[MAX_STACK_SIZE]; MtBoX*"
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int top=-1; U^9#uK6GM
int pivot; 3TNj*jo
int pivotIndex,l,r; #Dl=K<I
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stack[++top]=0; Hni?r!8r
stack[++top]=data.length-1;
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while(top>0){ t ;bU#THM
int j=stack[top--]; f^@DuI
int i=stack[top--]; kD_616
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pivotIndex=(i+j)/2; PsyXt5Dk
pivot=data[pivotIndex]; ^:^8M4:
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SortUtil.swap(data,pivotIndex,j); ]+@I]\S4
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//partition ^ <+V[=X
l=i-1; YiTVy/
r=j; -X,[NI3
do{ L~&r.81
while(data[++l] while((r!=0)&&(data[--r]>pivot)); h0zv@,u
SortUtil.swap(data,l,r); &&`-A6`p
} unAu8k^
while(l SortUtil.swap(data,l,r); 0GMov]W?i
SortUtil.swap(data,l,j); vQ1#Zgy
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if((l-i)>THRESHOLD){ p!H'JNG
stack[++top]=i; K&TO8
stack[++top]=l-1; +y9WJ
} Ag0)> PD^
if((j-l)>THRESHOLD){ &Q[|FO;[
stack[++top]=l+1; :o}LJc)|
stack[++top]=j; I+']av8e
} ~cb7]^#u1l
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} asKAHVT(
//new InsertSort().sort(data); nlR7V.
insertSort(data); NrWgaPO)i
} =4:]V\o):'
/** Q<2`ek
* @param data ZoT8
*/ s=83a{#K
private void insertSort(int[] data) { )wfqGkr=m!
int temp; C0
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for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 2~)r,.,
} %%hG],w
} ]seOc],4
} ?j@(1",=&
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} \'-E[xNcWI
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