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快速排序: ,F?~'-K
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package org.rut.util.algorithm.support; lGnql 1(
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import org.rut.util.algorithm.SortUtil; }Uwkef.Q
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/** CVGOX z
* @author treeroot 93^(O8.
* @since 2006-2-2 .i3lG(
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* @version 1.0 17n+4J]
*/ /_:T\`5uO
public class QuickSort implements SortUtil.Sort{ }KD7 Y
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/* (non-Javadoc) 5&-j{J0iV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EBIa%,
*/ f1CMR4D
public void sort(int[] data) { ]w_
quickSort(data,0,data.length-1); X #p o|,Q
} ET,0ux9F
private void quickSort(int[] data,int i,int j){ %TW%|"v
int pivotIndex=(i+j)/2; hs{&G^!jo
//swap \`P2Yq
SortUtil.swap(data,pivotIndex,j); w;yiX<t<
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int k=partition(data,i-1,j,data[j]); \8>
SortUtil.swap(data,k,j); -40'[a9E
if((k-i)>1) quickSort(data,i,k-1); q:2aPfo&
if((j-k)>1) quickSort(data,k+1,j); ?ae[dif
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} 2,8/Cb
/** ;o-\. =l
* @param data b"R, p=M
* @param i H)`C ncB
* @param j D0Vyh"ua
* @return _C< 6349w
*/ D4=..;
private int partition(int[] data, int l, int r,int pivot) { fCt^FU
do{ SE,o7_k'S
while(data[++l] while((r!=0)&&data[--r]>pivot); >%uAQiU
SortUtil.swap(data,l,r); J{Y6fHFi
} _DPB?)!x
while(l SortUtil.swap(data,l,r); 9SRfjS{7
return l; Xmap9x
} NCowt|#t
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} <mv7HKVg
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改进后的快速排序: HG{&U:>)
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package org.rut.util.algorithm.support; &\;<t,3A~
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import org.rut.util.algorithm.SortUtil; <^,o$b
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/** BA~a?"HS
* @author treeroot |?OdV<5C
* @since 2006-2-2 "C_T]%'Wm
* @version 1.0 .ocx(_3G
*/ v-P8WFjca
public class ImprovedQuickSort implements SortUtil.Sort { E:u ReT
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private static int MAX_STACK_SIZE=4096; Ad dGB^7yl
private static int THRESHOLD=10; 6B7<
/* (non-Javadoc) zq,iLoY[R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [leW/2i
*/ "KMLk
public void sort(int[] data) { DRH'A!r!
int[] stack=new int[MAX_STACK_SIZE]; ^y:FjQC:
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int top=-1; Hu<p?mF#
int pivot; PV?]UUc'n<
int pivotIndex,l,r; +O)]^"TG
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stack[++top]=0; Dc5bkm
stack[++top]=data.length-1; }X=87ud
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while(top>0){ Wm<z?.lS
int j=stack[top--]; ~}h^38
int i=stack[top--]; #2h+dk$1
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pivotIndex=(i+j)/2; `'uUmyg
pivot=data[pivotIndex]; .
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SortUtil.swap(data,pivotIndex,j); ]\OWZ{T'j
b& V`<'{
//partition 3AK(dC[ri
l=i-1; U);OR
r=j; N6h1|_o
do{ $Z/klSEf
while(data[++l] while((r!=0)&&(data[--r]>pivot)); mKV'jm0
SortUtil.swap(data,l,r); #e*X0;m
} =K:(&6f<t
while(l SortUtil.swap(data,l,r); mV<i JZh
SortUtil.swap(data,l,j); sYI~dU2H
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if((l-i)>THRESHOLD){ Mec{_jiH&D
stack[++top]=i; )7W6-.d
stack[++top]=l-1; WE")xhV6
} 5^>n5u/
if((j-l)>THRESHOLD){ rnu
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stack[++top]=l+1; Gfv(w=rr?
stack[++top]=j; hm3jpWi8
} Id%_{),HX
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} job[bhK'Jt
//new InsertSort().sort(data); co/7l sW
insertSort(data); VpSEVd:n
} DF'8GF&Rp
/** +vz`go
* @param data X/Y#U\
*/ R uLvG+
private void insertSort(int[] data) { NY@"&p'Q
int temp; W<NmsG})_g
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); Ib1e#M3
} rs:Q%V
^
} IZ 8y}2
} RlsVC_H\
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} A
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