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快速排序: HeCQF=R
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package org.rut.util.algorithm.support; :$lx]
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import org.rut.util.algorithm.SortUtil; -L}crQl.'c
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/** Xkk m~sM6
* @author treeroot Zu951+&`
* @since 2006-2-2 n(\5Z&
* @version 1.0 X!KjRP\\
*/ sluR@[l
public class QuickSort implements SortUtil.Sort{ -Zh`h8gX
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/* (non-Javadoc) `}Ssc-A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RoFy2A=_
*/ }J$Q
public void sort(int[] data) { x'tYf^Va28
quickSort(data,0,data.length-1); B[w~bW|K
} ,#@B3~giC
private void quickSort(int[] data,int i,int j){ :
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int pivotIndex=(i+j)/2; t>:2F,0K9
//swap nSdta'6
SortUtil.swap(data,pivotIndex,j); x>TH yY[sq
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int k=partition(data,i-1,j,data[j]); BR;f!
SortUtil.swap(data,k,j); l$=Y(Xk
if((k-i)>1) quickSort(data,i,k-1); n@r'b{2;l
if((j-k)>1) quickSort(data,k+1,j); Q[O[,Rk
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} Z6#}6Y{
/** L?T%;VdG'>
* @param data ?]+{2&&$
* @param i M}MXR=X,
* @param j O:3LA-vA
* @return %Aq+t&-BCX
*/ {PZNJ 2~
private int partition(int[] data, int l, int r,int pivot) { {L^b['h@
do{ }c?/-ab>
while(data[++l] while((r!=0)&&data[--r]>pivot); #&a-m,Y$sx
SortUtil.swap(data,l,r); 9&a&O
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} {fW(e?8)
while(l SortUtil.swap(data,l,r); PZmg7N
return l; /2Q@M>
} m08:EXP
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} gx~79;6
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改进后的快速排序: 0 UdAF
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package org.rut.util.algorithm.support; 1D159 NLB
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import org.rut.util.algorithm.SortUtil; AvnK?*5!@
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/** x@/ N9*
* @author treeroot h.+{cOA;n
* @since 2006-2-2 Gu?OyL
* @version 1.0 %GG:F^X#
*/
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public class ImprovedQuickSort implements SortUtil.Sort { f6@fi`U,
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private static int MAX_STACK_SIZE=4096; @y?<Kv}s
private static int THRESHOLD=10;
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/* (non-Javadoc) 4Rj;lAlwB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +s?0yH-%p
*/ _' KJ:3e
public void sort(int[] data) { e%.Xya#\
int[] stack=new int[MAX_STACK_SIZE]; Hg$t,\j
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int top=-1; R+,eX jz"
int pivot; m:U.ao6
int pivotIndex,l,r; gw[\7
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stack[++top]=0; <,/k"Y=
stack[++top]=data.length-1; CZaUrr
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while(top>0){ aBv3vSq>Q
int j=stack[top--]; "BSSA%u?c
int i=stack[top--]; i
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pivotIndex=(i+j)/2; ZuF"GNUC
pivot=data[pivotIndex]; g%z'#E97
}@Rq'VPZd
SortUtil.swap(data,pivotIndex,j); n/*BK;
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//partition ^Qrezl&
l=i-1; .u[hK
r=j; e_mUO"
do{ )c~1s
while(data[++l] while((r!=0)&&(data[--r]>pivot)); <k'JhMwN
SortUtil.swap(data,l,r); RW19I,d
} `
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while(l SortUtil.swap(data,l,r); ?S&pq?
SortUtil.swap(data,l,j); m2&"}bI{
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if((l-i)>THRESHOLD){ 5m2`$y-nb
stack[++top]=i; fT)u`voE,
stack[++top]=l-1; ia=eFWt.
} #m 2Ss
if((j-l)>THRESHOLD){ Np$peT[
stack[++top]=l+1; ':al4m"
stack[++top]=j; kT|{5Kn&s
} x0aPY;,N0
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} R1.No_`PHq
//new InsertSort().sort(data); n27df9L
insertSort(data); =R+z\`2
} dMkDNaH,
/** MZ" yjQ A
* @param data %N}OMc.W
*/ %{GYTc \'X
private void insertSort(int[] data) { |M&i#g<A;
int temp; qm30,$\c`~
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); `>M;f%s
} c6zghP3dR
} v.Fq.
} b'i-/l$
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} 2de[ yz
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