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快速排序: `9$?g|rB
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package org.rut.util.algorithm.support; n|^-qy'w
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import org.rut.util.algorithm.SortUtil; ,L_p"A
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/** JQbI^ef_;
* @author treeroot +F67g00T|
* @since 2006-2-2 OjZ+gl}
* @version 1.0 v3aiX
*/ Vwv O@G7A
public class QuickSort implements SortUtil.Sort{ :.sK:W("v
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/* (non-Javadoc) lYy0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]bS\*q0Zf(
*/ nC`=quM9
public void sort(int[] data) { }25{"R}K
quickSort(data,0,data.length-1); %oN^1a'&)
} {OQ sGyR?
private void quickSort(int[] data,int i,int j){ q .?D{[2
int pivotIndex=(i+j)/2; #UGbSOoCtn
//swap 8SKDL[rN
SortUtil.swap(data,pivotIndex,j); mXa1SZnE
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int k=partition(data,i-1,j,data[j]); xp,H5
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SortUtil.swap(data,k,j); j[Et+V?
if((k-i)>1) quickSort(data,i,k-1); )ns;S
if((j-k)>1) quickSort(data,k+1,j); o.j;dsZ
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} Vxk0oIk`
/** R?]>8o,
* @param data *W i(%
* @param i eL-92]]e
* @param j W 6jB!W
* @return !0zM@p
*/ @zPWu}&m
private int partition(int[] data, int l, int r,int pivot) { Y4b"(ZhM_
do{ sQt@B#;
while(data[++l] while((r!=0)&&data[--r]>pivot); 2f~s$I&l#
SortUtil.swap(data,l,r); 8@Y@5)Oc
} bg 7b!t1F
while(l SortUtil.swap(data,l,r); zM)o^Fn2
return l; %7L'2/Y2x
} ~}TVM%0RTq
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} ?DpMR/
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改进后的快速排序: cvc.-7IO
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package org.rut.util.algorithm.support; |pJ.73
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import org.rut.util.algorithm.SortUtil; }*+ca>K
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/** 5@Rf]'1B0
* @author treeroot KL -8Aj~
* @since 2006-2-2 wGbD%=
* @version 1.0 7AtJ6
*/ ]bX.w/=
public class ImprovedQuickSort implements SortUtil.Sort { b},OCVT?
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private static int MAX_STACK_SIZE=4096; W]reQ&<Z
private static int THRESHOLD=10; eBBh/=Zc
/* (non-Javadoc) lYq
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B%r)~?6DM
*/ R':a,6O
public void sort(int[] data) { )~!Gs/w6
int[] stack=new int[MAX_STACK_SIZE]; N(F9vZOs
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int top=-1; !q$IB?8
int pivot; ~IlgcCF
int pivotIndex,l,r; McA,
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stack[++top]=0; w`i3B@w
stack[++top]=data.length-1; b}k`'++2,
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while(top>0){ |n* I}w^
int j=stack[top--]; (\SxG\`
int i=stack[top--]; #mtlgK'
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pivotIndex=(i+j)/2; ~/gqXT">
pivot=data[pivotIndex]; ;.m"y-
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SortUtil.swap(data,pivotIndex,j); q}+9$v
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//partition \t )Zk2
l=i-1; c)lMi}/
r=j; ]Ub?Wo7F?
do{ qzV:N8+,`
while(data[++l] while((r!=0)&&(data[--r]>pivot)); 2uqdx'^"
SortUtil.swap(data,l,r); H%sbf&
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} &o)j@5Y?
while(l SortUtil.swap(data,l,r); g3"`b)M
SortUtil.swap(data,l,j); |-Y,:sY:
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if((l-i)>THRESHOLD){ 9n44 *sZ
stack[++top]=i; `_z8DA}E
stack[++top]=l-1; Riu0;U( \
} GndF!#?N(
if((j-l)>THRESHOLD){ V=1Y&y
stack[++top]=l+1; ^bS&[+9E
stack[++top]=j; My=p>{s
} `ZNzDr
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} v')T^b
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//new InsertSort().sort(data); ~
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insertSort(data); o- GHAQ
} @u$4{sjgf\
/** /|hKZTZJdN
* @param data _H@S(!
*/ uvZ|6cM
private void insertSort(int[] data) { "EhA _ =i
int temp; 6XB9]it6
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); "EHwv2Hm>
} oXb}6YC
} [% YCupr#
} o^5xCK:Oi2
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} 72luTR Q
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