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快速排序: `S((F|Ty=;
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package org.rut.util.algorithm.support; [Z/P[370
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import org.rut.util.algorithm.SortUtil; A/=cGE
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/** P7}w^#x
* @author treeroot w-WAgAch
* @since 2006-2-2 k`>qb8,
* @version 1.0 R,D/:k'~k
*/ '~b
public class QuickSort implements SortUtil.Sort{ Ut~YvWc9
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/* (non-Javadoc) Z|@-=S(.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lJAzG,f
*/ `P\H{
public void sort(int[] data) { `{YOl\d_
quickSort(data,0,data.length-1); X#axCDM-
} EO+Ix7w
private void quickSort(int[] data,int i,int j){ TQeIAy
int pivotIndex=(i+j)/2; ;VCV%=W<
//swap MMa`}wSs
SortUtil.swap(data,pivotIndex,j); E*)A!2rlK
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int k=partition(data,i-1,j,data[j]); _~Od G
SortUtil.swap(data,k,j); aEdMZ+P.
if((k-i)>1) quickSort(data,i,k-1); MkVv5C
if((j-k)>1) quickSort(data,k+1,j); ^'Lp<YJs6
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} ;0_T\{H"nR
/** %pg)*>P h
* @param data Z=-#{{bv
* @param i w#9.U7@.
* @param j f|~'(~Sr
* @return =X'EDw
*/ ;woK96"{t
private int partition(int[] data, int l, int r,int pivot) { 1Mq"f7X8
do{ suQ`a_zJ
while(data[++l] while((r!=0)&&data[--r]>pivot); KUX6n(u
SortUtil.swap(data,l,r); L'
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} q#Otp\f
while(l SortUtil.swap(data,l,r); q:up8-LAr
return l; !pe[H*Cy
} XKp(31])
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改进后的快速排序: b7xOm"X,N
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package org.rut.util.algorithm.support; xz@*V>QT
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import org.rut.util.algorithm.SortUtil; *W2] Kxx*
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/** q:vN3#=^qf
* @author treeroot aEQrBs
* @since 2006-2-2 dG3?(}p+
* @version 1.0 w2 (}pz:
*/ i{:?Iw 'ay
public class ImprovedQuickSort implements SortUtil.Sort { 3|e~YmZx
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private static int MAX_STACK_SIZE=4096; x2~fc
private static int THRESHOLD=10; r_ 9"^Er
/* (non-Javadoc) zGO_S\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;,/G*`81B
*/ P[`>*C\9c
public void sort(int[] data) { p^{yA"MQ
int[] stack=new int[MAX_STACK_SIZE]; f3,Xb
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int top=-1; ViOXmK"
int pivot; 4u p7:?
int pivotIndex,l,r; V'.gE6we
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stack[++top]=0; `h'Ab63
stack[++top]=data.length-1; %,N-M]Jf
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while(top>0){ WFug-#;e
int j=stack[top--]; V!e`P
int i=stack[top--]; DS|x*w'I
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pivotIndex=(i+j)/2; ENYc.$r
pivot=data[pivotIndex]; w0>5#jq#r
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SortUtil.swap(data,pivotIndex,j); 6(Cjak+~!
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//partition K/(Z\lL
l=i-1; T/L\|_:'
r=j; ^y&2N
do{ kYS\TMt,C
while(data[++l] while((r!=0)&&(data[--r]>pivot)); u 8~5e
SortUtil.swap(data,l,r); l 9rN!Q|
} 48GaZ@v
while(l SortUtil.swap(data,l,r); F
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SortUtil.swap(data,l,j); $iy(+}
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if((l-i)>THRESHOLD){ [di&N!Ao
stack[++top]=i; ]w8h#p
stack[++top]=l-1; S@L%X<Vm
} IgF#f%|Q
if((j-l)>THRESHOLD){ >vfLlYx
stack[++top]=l+1; )/v`k>E
stack[++top]=j; b!;WF
} 1kc{`oL
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} K!88 Nox(
//new InsertSort().sort(data); WdrMp
insertSort(data); B8-Y)u1G
} MIv,$
/**
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* @param data 6`'K M/
*/ kdm@1x
private void insertSort(int[] data) { 7sJGB^vM
int temp; n{F&GE="
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); 4,6?sTuX
} xO
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} Ac,bf 8C
} PPtJ/
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