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快速排序: APuu_!ez1
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package org.rut.util.algorithm.support; ?M<|r11}
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import org.rut.util.algorithm.SortUtil; =+Tsknq
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/** &|] Fg5
* @author treeroot ^z?=?%{
* @since 2006-2-2 R7t
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* @version 1.0 gD40y\9r
*/ PDZ)*$EE
public class QuickSort implements SortUtil.Sort{ +2(PcJR~
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/* (non-Javadoc) d.1Q~&`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g[<uwknf
*/ ke</x+\F
public void sort(int[] data) { |vN$"mp^a
quickSort(data,0,data.length-1); B)d@RAk
} 9;:7e*x]lc
private void quickSort(int[] data,int i,int j){ A>y#}^l]
int pivotIndex=(i+j)/2; /
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//swap :O#gJob-%s
SortUtil.swap(data,pivotIndex,j); Q,TaJ]
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int k=partition(data,i-1,j,data[j]); "U{mMd!9L
SortUtil.swap(data,k,j); qZc)Sa.S
if((k-i)>1) quickSort(data,i,k-1); gU*I;s>
if((j-k)>1) quickSort(data,k+1,j); > hesxC!
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} vev8l\
/** ,XP@ pi
* @param data !j'guT&9]
* @param i m"1
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* @param j p!V)55J*
* @return L/%xbm~
*/ ;WPI+`-
private int partition(int[] data, int l, int r,int pivot) { E<P*QZ-C3
do{ 4t(QvIydA
while(data[++l] while((r!=0)&&data[--r]>pivot); *xho
SortUtil.swap(data,l,r); 0MhxFoFO
}
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while(l SortUtil.swap(data,l,r); akY6D]M
return l; -hm9sNox
} t"FRLC
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改进后的快速排序: Kjvs@~6t
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package org.rut.util.algorithm.support; 0c{Gr 0[>
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import org.rut.util.algorithm.SortUtil; Z 'Zd[."s
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/** KN|'|2/|
* @author treeroot Zj5NWzj
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* @since 2006-2-2 pzYG?9cwz
* @version 1.0 E ,Dlaq
*/ )z|_*||WU^
public class ImprovedQuickSort implements SortUtil.Sort { J\9jsx!WQ
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private static int MAX_STACK_SIZE=4096; iNMLYYq]l
private static int THRESHOLD=10; *GB$sXF
/* (non-Javadoc) 8~rT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .jy)>"h0
*/ P/HHWiD`D
public void sort(int[] data) { ],WwqD=
int[] stack=new int[MAX_STACK_SIZE]; SlM>";C\
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int top=-1; y;*My#
int pivot; AZ]Z,s6
int pivotIndex,l,r; C5d/)aC
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stack[++top]=0; nT(!HDH
stack[++top]=data.length-1; PP~CZ2Fze
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while(top>0){ /<Gyg7o0
int j=stack[top--]; (gv=P>:
int i=stack[top--]; GXGN;,7EV
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pivotIndex=(i+j)/2; )I^)*(}
pivot=data[pivotIndex]; zV9
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SortUtil.swap(data,pivotIndex,j); 4"rb&$E
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//partition %!1@aL]pQ
l=i-1; ]M02>=1
r=j; 6uv'r;U]
do{ X:iG[iU*
while(data[++l] while((r!=0)&&(data[--r]>pivot)); %l0_PhAB
SortUtil.swap(data,l,r); Z%(Df3~gmm
} OD>u$tI9
while(l SortUtil.swap(data,l,r); BIwgl@t!>
SortUtil.swap(data,l,j); lU>)n
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if((l-i)>THRESHOLD){ 0EF,uRb
stack[++top]=i; S8rW'}XJ=H
stack[++top]=l-1; 89?3,k
} pRb+'v&_k
if((j-l)>THRESHOLD){ YLr%vnO*NS
stack[++top]=l+1; >&4I.nA
stack[++top]=j; (Qw`%B
} ~QQEHx\4zZ
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} ([z<TS#Md
//new InsertSort().sort(data); 4'7
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insertSort(data); #w[q.+A
} _Y:Ja0,
/** C"V?yDy2~
* @param data X}ey0)g%
*/ hvwnG>m\
private void insertSort(int[] data) { (dw3'W
int temp; OoA5!HEh
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ?}!gLp
} W_Ws3L1;N
} t\E-6u
} Iltg0`
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} t(LlWd
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