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快速排序: c3gy{:lb
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package org.rut.util.algorithm.support; }57wE$9K
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import org.rut.util.algorithm.SortUtil; GfAt-huL(
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/** `eIX*R
* @author treeroot ^@
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* @since 2006-2-2 {d\erG(
* @version 1.0 $X%GzrN
*/ ;SzOa7
public class QuickSort implements SortUtil.Sort{ OCzWP,
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/* (non-Javadoc) zaX!f~;"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J}7iXTh
*/ H!Y`?Rc
public void sort(int[] data) { R|T_9/#)
quickSort(data,0,data.length-1); M%wj6!5
} D<[4}og&]
private void quickSort(int[] data,int i,int j){ J9oGwP
int pivotIndex=(i+j)/2; krTH<- P
//swap 5|ih>? C/(
SortUtil.swap(data,pivotIndex,j); % Ke:%##Y
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int k=partition(data,i-1,j,data[j]); kb?QQ\e
SortUtil.swap(data,k,j); &0O1tM*v
if((k-i)>1) quickSort(data,i,k-1); A2z%zMlZc
if((j-k)>1) quickSort(data,k+1,j); )-824?Nl:
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} J!,5HJh1
/** uG\+`[-{0
* @param data E+$vIYq:W
* @param i qoBm!|q
* @param j im^G{3z
* @return S] Gw}d]4
*/ 22L#\qVkl
private int partition(int[] data, int l, int r,int pivot) { t_&FK A
do{ ;m}lmq,
while(data[++l] while((r!=0)&&data[--r]>pivot); Hw34wQX
SortUtil.swap(data,l,r); Y%$57,Bu n
} VdR5ZP
while(l SortUtil.swap(data,l,r); 6uQfe?aD
return l; yzhr"5_
} JBdZ]
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改进后的快速排序: b1>%%#
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; ~130"WQ;
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/** F]3iL^v
* @author treeroot MJ>9[hs
* @since 2006-2-2 xaWd\]UF
* @version 1.0 \>w[#4`m
*/ 6
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public class ImprovedQuickSort implements SortUtil.Sort { F#@Mf?#2
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private static int MAX_STACK_SIZE=4096; 3|RfX
private static int THRESHOLD=10; )Y@
/* (non-Javadoc) \$s<G|<P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Py6c=&*
*/ Zi/l.=9n
public void sort(int[] data) { DY?`Y%"
int[] stack=new int[MAX_STACK_SIZE]; ]j0v.[SX
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int top=-1; 38Lc|w
int pivot; Zb`}/%\7
int pivotIndex,l,r; w:Fes
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stack[++top]=0; zt!mx{l'
stack[++top]=data.length-1; .@.,D% 7<
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while(top>0){ ["GC
int j=stack[top--]; %MgQ.
int i=stack[top--]; {<&I4V@+
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pivotIndex=(i+j)/2; $k*E^~qT
pivot=data[pivotIndex]; !l@IG C
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SortUtil.swap(data,pivotIndex,j); ]*U\ gm%
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//partition AV AF!Z
l=i-1; q~.\NKc
r=j; K9}ppgL'$
do{ pox\Gu~.0
while(data[++l] while((r!=0)&&(data[--r]>pivot)); .Xh ^L
SortUtil.swap(data,l,r); "$PbpY
} ;PI=jp
while(l SortUtil.swap(data,l,r); mkTf}[O
SortUtil.swap(data,l,j); w``t"v4
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if((l-i)>THRESHOLD){ BqK|4-Pf
stack[++top]=i; k}l5v)m
stack[++top]=l-1; e{.2*>pH
} "m ):"
if((j-l)>THRESHOLD){ _Qs)~
stack[++top]=l+1; p0? XR
stack[++top]=j; +wwpaR`
} <6U{I '
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} XCoN!~
//new InsertSort().sort(data); R>BI;IcX
insertSort(data); =El.uBz{
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/** WZdA<<,:o
* @param data 8(q4D K\5u
*/ I5>HB;Q
private void insertSort(int[] data) { W}+Q!T=
int temp; O[3J Px
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); UL$^zR3%d
} "lx}.
} o\1"ux;b
} `Z>4}<~+
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} #JeZA0r5
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