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快速排序: >ZMB}pt`
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package org.rut.util.algorithm.support; M@$}Og
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import org.rut.util.algorithm.SortUtil; &u5OL?>
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/** y<7C!E#b8
* @author treeroot Ay7I_"%
* @since 2006-2-2 }*.S=M]y$
* @version 1.0 e~tgd8a2a
*/ %lVc7L2]
public class QuickSort implements SortUtil.Sort{ lej-,HX
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/* (non-Javadoc) 2NS(;tBB0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'n`+R~Kkh
*/ aRSGI ja<L
public void sort(int[] data) { b-pZrnZ!
quickSort(data,0,data.length-1); '6l4MR$j&m
} ^z&eD,
private void quickSort(int[] data,int i,int j){ -2NXQ+m ;
int pivotIndex=(i+j)/2; {)j~5m.,/o
//swap Oax*3TD
SortUtil.swap(data,pivotIndex,j); #+)AIf
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int k=partition(data,i-1,j,data[j]); "YU<CO;4VV
SortUtil.swap(data,k,j); 8bQ\7jb
if((k-i)>1) quickSort(data,i,k-1); l*^J}oY
if((j-k)>1) quickSort(data,k+1,j); W[trsFP1?
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} 3vx5dUgl,
/** )?35!s6
* @param data AF ,*bb
* @param i HUF],[N
* @param j Tb~|p_;o
* @return (,Zy2wr=
*/ y/}[S@4uB
private int partition(int[] data, int l, int r,int pivot) { W\mj?R
do{ N ] KS\
while(data[++l] while((r!=0)&&data[--r]>pivot); I'pOB
SortUtil.swap(data,l,r); 7.7aHt0
} ~>C@n'\lv
while(l SortUtil.swap(data,l,r); j8k5B"
return l; >b2j j+8
} 12
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改进后的快速排序: u6hDjN
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package org.rut.util.algorithm.support; Z(Styn/x
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import org.rut.util.algorithm.SortUtil; W+HiH`Qb]
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/** SU,S1C_q8
* @author treeroot gc~nT/lfK
* @since 2006-2-2 Z)
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* @version 1.0 Ul"9zTH
*/ 50,`=Z
public class ImprovedQuickSort implements SortUtil.Sort { 5^kLNNum
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private static int MAX_STACK_SIZE=4096; &72
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private static int THRESHOLD=10; |'mwr!
/* (non-Javadoc) O&DkB*-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iBCZx>![;
*/ 6T-h("t
public void sort(int[] data) { ]=X6*
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int[] stack=new int[MAX_STACK_SIZE]; [bE-Uu7q5P
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int top=-1; =;9
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int pivot; 9o)sSaTx=
int pivotIndex,l,r; UoDS)(i
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stack[++top]=0; 6"3-8orj
stack[++top]=data.length-1; p~(+4uA
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while(top>0){ UZcsMMKH
int j=stack[top--]; w'Y(doY,
int i=stack[top--]; OS$}ej\
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pivotIndex=(i+j)/2; 0tA~Y26
pivot=data[pivotIndex]; ?vA)F)MS
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SortUtil.swap(data,pivotIndex,j); Uc>kiWW
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//partition :/rl \woA>
l=i-1; n6A N
r=j; O}#Ic$38
do{ ^?+qNbK
while(data[++l] while((r!=0)&&(data[--r]>pivot)); |3LD"!rEx
SortUtil.swap(data,l,r); 7rIz
} 7j,-o
while(l SortUtil.swap(data,l,r); qq
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SortUtil.swap(data,l,j); W=E+/ZvPt
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if((l-i)>THRESHOLD){ Lzr&Q(mL
stack[++top]=i; F~bDA~
stack[++top]=l-1; v,T:V#f^
} DIqM\ ><
if((j-l)>THRESHOLD){ |}^me7C,[
stack[++top]=l+1; "|N58%
stack[++top]=j; 'SW%EVB
}
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} T]er_n
//new InsertSort().sort(data); /Pbytu);ds
insertSort(data); tLH:'"{zx
} m!22tpb
/** %
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* @param data ]izrr
*/ bEQy5AX
private void insertSort(int[] data) { %rFR:w`{
int temp; x3>ZO.Q
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); lw\+!}8(
} \eF_Xk[
} 9f#~RY|#m
} !+UU[uM
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} }l>\D~:M
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